HP Hewlett Packard Switch SB Series User Manual

SB SERIES  
FIBEROPTIC SWITCH  
User’s Manual  
 
Contents  
Safety Information, Instructions, and Symbols.......................................................................1  
Safety Information...........................................................................................................1  
Classification .......................................................................................................1  
Disconnecting from Line Power...........................................................................1  
Line Power Requirements ...................................................................................1  
Fuse Type............................................................................................................1  
Safety Instructions...........................................................................................................2  
Before Initializing and Operating the Unit ............................................................2  
Operating the Unit ...............................................................................................2  
Safety Symbols ...............................................................................................................4  
Compliance .....................................................................................................................5  
CE Compliance....................................................................................................5  
General Information and Specifications ..................................................................................6  
General Information ........................................................................................................6  
Single-Common (SB-C) Switch Configuration .....................................................6  
Dual-Common (SB-D) Switch Configuration........................................................7  
Single Step Dual Common (SB-E) Switch Configuration.....................................7  
Dual-Common Blocking (SB-F) Switch Configuration..........................................8  
Key Features .......................................................................................................8  
Applications .........................................................................................................8  
Standard Accessories..........................................................................................8  
Optional Accessories...........................................................................................8  
Specifications..................................................................................................................9  
Getting Started........................................................................................................................11  
Before Initializing and Operating the Unit......................................................................11  
Initial Inspection.............................................................................................................11  
Operating Environment .................................................................................................11  
Temperature......................................................................................................12  
Humidity.............................................................................................................12  
Ventilation..........................................................................................................12  
Storing and Shipping.....................................................................................................12  
Claims and Repackaging...................................................................................12  
Returning Shipments to JDS Uniphase .............................................................12  
Cleaning Connectors.....................................................................................................13  
Installing the Switch.......................................................................................................14  
Operating and Maintenance Instructions ..............................................................................15  
Front Panel....................................................................................................................15  
Operating Keys..................................................................................................15  
Status LEDs.......................................................................................................15  
Rear Panel ....................................................................................................................16  
External Switch Module Connections............................................................................16  
External Switch Module without TTL Input Controls...........................................16  
External Switch Module with TTL Input Controls................................................17  
SD000153 Rev. J  
May 2000  
 
Sample Driver Application: Electrical Equivalent of Driver.............................................17  
Powering Up the Switch ................................................................................................18  
Using and Selecting a Channel.....................................................................................18  
Setting the GPIB Address .............................................................................................19  
Setting the Interface Command Set for SC and SX Switches.......................................19  
Controlling the Drivers...................................................................................................19  
Controlling the Switch Locally .......................................................................................20  
Controlling the Switch Remotely by GPIB Interface ......................................................20  
Controlling the Switch Remotely by RS232 Interface....................................................20  
Calibrating the Switch....................................................................................................21  
Maintaining the Switch ..................................................................................................21  
Programming Guide................................................................................................................23  
GPIB Pin Assignment....................................................................................................23  
Setting the GPIB Address .............................................................................................23  
GPIB Interface Functions ..............................................................................................24  
RS232 Pin Assignment .................................................................................................24  
RS232 Interface Specifications.....................................................................................24  
RS232 Driver Pin Assignment.......................................................................................25  
Operation and Query Commands .................................................................................25  
Command Parser Rules.....................................................................................25  
Operation Commands........................................................................................26  
Query Commands..............................................................................................27  
Status Reporting and Service Request Control.............................................................29  
Condition Register.............................................................................................29  
Status Register ..................................................................................................29  
SRQ Mask Register ...........................................................................................30  
GPIB Programming Examples.......................................................................................30  
Sending Commands ..........................................................................................31  
Serial Polling the Status Register ......................................................................31  
Generating a Service Request Interrupt ............................................................32  
Learn Query (LRN?) ..........................................................................................32  
RS232 Programming Examples....................................................................................32  
Sending Commands ..........................................................................................33  
Querying Status.................................................................................................33  
Reading the Status Register..............................................................................33  
Setting the Interface Command Set..............................................................................33  
SC Series Switch Command Set (SCXXX-0XXX Models) .................................34  
SX Series Switch Command Set .......................................................................34  
SD000153 Rev. J  
May 2000  
 
For sales and service information,  
contact JDS Uniphase or your local representative.  
JDS Uniphase Corporation  
570 West Hunt Club Road  
Nepean, Ontario, Canada  
K2G 5W8  
Phone: 613 727-1303  
Fax: 613 727-8284  
SD000153 Rev. J  
May 2000  
 
Safety Information, Instructions, and Symbols  
Safety Information  
Classification  
The unit consists of an exposed metal chassis that is connected directly to earth via a power  
cord and, therefore, is classified as a Class 1 instrument. Class 1 refers to equipment relying  
on ground protection as a means of shock protection.  
The following symbol is used to indicate a protective conductor terminal in the unit.  
Disconnecting from Line Power  
Some of the circuits are powered whenever the unit is connected to the AC power source (line  
power). To ensure that the unit is not connected to the line power, disconnect the power cord  
from either the power inlet on the unit’s rear panel or from the AC line-power source  
(receptacle). The power cord must always be accessible from one of these points. If the unit is  
installed in a cabinet, the operator must be able to disconnect the unit from the line power by  
the system’s line-power switch.  
Line Power Requirements  
The unit can operate from any single-phase AC power source that supplies between 100 and  
240 V at a frequency range of 50 to 60 Hz. The maximum power consumption is 80 VA.  
Fuse Type  
The fuse type used by the unit is (5x20) mm, T1A / 250 V (slow).  
Safety – 1  
 
Safety Instructions  
The following safety instructions must be observed whenever the unit is operated, serviced, or  
repaired. Failure to comply with any of these instructions or with any precaution or warning  
contained in the user’s manual is in direct violation of the standards of design, manufacture,  
and intended use of the unit. JDS Uniphase assumes no liability for the customer’s failure to  
comply with any of these safety requirements.  
Before Initializing and Operating the Unit  
Inspect the unit for any signs of damage, and read the user’s manual thoroughly.  
Install the unit as specified in the Getting Started section.  
Ensure that the unit and any devices or cords connected to it are properly grounded.  
Operating the Unit  
Warning  
To avoid the risk of injury or death, always observe the following precautions  
before initializing the unit:  
If using a voltage-reducing autotransformer to power the unit, ensure that  
the common terminal connects to the earthed pole of the power source.  
Use only the type of power cord supplied with the unit.  
Connect the power cord only to a power outlet equipped with a protective  
earth contact. Never connect to an extension cord that is not equipped with  
this feature.  
Willfully interrupting the protective earth connection is prohibited.  
Never look into the end of an optical cable connected to an optical output  
device that is operating. Laser radiation is invisible, and direct exposure can  
severely injure the human eye. For more information, see the user’s manual  
of the laser source in use.  
Turning off the power to the device does not always block the externally  
supplied radiation to the connector at the output of the unit.  
Do not use the unit outdoors.  
To prevent potential fire or shock hazard, do not expose the unit to any  
source of excessive moisture.  
Do not operate the unit when its covers or panels have been removed.  
Do not interrupt the protective earth grounding. Any such action can lead to  
a potential shock hazard that can result in serious personal injury.  
Do not operate the unit if an interruption to the protective grounding is  
suspected. In this case, ensure that the unit remains inoperative.  
Use only the type of fuse specified by the manufacturer as appropriate for  
this unit. Do not use repaired fuses, and avoid any situations that can short-  
Safety – 2  
 
circuit the fuse.  
Unless absolutely necessary, do not attempt to adjust or perform any  
maintenance or repair procedure when the unit is opened and connected to  
a power source.  
Repairs are to be carried out only by a qualified professional.  
Do not attempt any adjustment, maintenance, or repair procedure to the  
unit’s internal mechanism if immediate first aid is not accessible.  
Disconnect the power cord from the unit before adding or removing any  
components.  
Operating the unit in the presence of flammable gases or fumes is  
extremely hazardous.  
Do not perform any operating or maintenance procedure that is not  
described in the user’s manual.  
Some of the unit’s capacitors can be charged even when the unit is not  
connected to the power source.  
Safety – 3  
 
Safety Symbols  
The following symbols and messages can be marked on the unit (Table 1). Observe all safety  
instructions that are associated with a symbol.  
Table 1: Safety Symbols  
Symbol  
Description  
Laser safety. See the user’s manual for instructions on handling and operating  
the unit safely.  
See the user’s manual for instructions on handling and operating the unit  
safely.  
Electrostatic discharge (ESD). See the user’s manual for instructions on  
handling and operating the unit safely.  
Frame or chassis terminal for electrical grounding within the unit.  
Protective conductor terminal for electrical grounding to the earth.  
The procedure can result in serious injury or loss of life if not carried out  
in proper compliance with all safety instructions. Ensure that all  
conditions necessary for safe handling and operation are met before  
proceeding.  
WARNING  
CAUTION  
The procedure can result in serious damage to or destruction of the unit if not  
carried out in compliance with all instructions for proper use. Ensure that all  
conditions necessary for safe handling and operation are met before  
proceeding.  
Safety – 4  
 
Compliance  
CE Compliance  
The unit has been designed and tested to comply with directive 73/23/EEC and its subsequent  
amendments by the European Community (EC or CE). The directive relates to electrical  
equipment designed for use within certain voltage limits. It ensures that electrical equipment is  
constructed with good engineering practice in safety matters.  
The unit has been designed and tested to comply with directive 89/336/EEC, exclusive of the  
1997 amendment. The directive relates to electromagnetic compatibility. It demands that  
electromagnetic disturbance does not exceed a prescribed level; that the equipment be  
immune to a prescribed level of ambient level of interference; that the equipment be protected  
against electrostatic discharges; and that the equipment be immune to all electrical shock  
wave disturbances.  
The requirements specified by directive 89/336/EEC are as follows. CE compliance requires  
that the manufacturer or its authorized representative established within the Community affix  
the EC conformity mark to the apparatus or else to the packaging, instructions for use, or  
guarantee certificate. The EC conformity mark shall consist of the letters CE as specified and  
the figures of the year in which the mark was affixed. This mark should, where appropriate, be  
accompanied by the distinctive letters used by the notified body issuing the EC type-  
examination certificate. Where the apparatus is the subject of other Directives providing for the  
EC conformity mark, the affixing of the EC mark shall also indicate conformity with the relevant  
requirements of those other Directives.  
Safety – 5  
 
General Information and Specifications  
General Information  
This user’s manual for the SB Series Fiberoptic Switch contains complete operating  
instructions.  
The SB Series 1xN programmable switches are designed to connect a single fiberoptic input  
channel to any of N (up to 48) output channels (Figure 1). The performance, configuration,  
flexibility, and portable enclosure are suitable for a wide range of applications, including  
fiberoptic component testing systems, remote fiber test systems in telecommunications, and  
research and development. Single-mode and multimode versions of the switches are available.  
The SB Series switches are bidirectional.  
Figure 1: SB Switch  
The SB switch connects the input to a selected output channel. The terminations are precisely  
aligned by a processor-controlled stepper motor. Collimating lenses terminate the fiberoptic  
attachments, minimizing the insertion loss of the switch and improving the repeatability and  
stability of its parameters.  
The SB switch is equipped with IEEE 488.1 parallel and RS232 serial interfaces for remote  
operation. The switch also is operated manually using the front-panel controls. The switch  
status is displayed on the front-panel indicators.  
The SB switch is available in single-common (SB-C) and dual-common (SB-D, SB-E, and SB-  
F) configurations. The dual-common units support two (paired) fiberoptic input channels.  
Single-Common (SB-C) Switch Configuration  
The common input channel (C) is connected to the output channel (1). The reset position (0) of  
the switch is an open circuit. This configuration is shown in Figure 2.  
General Information and Specifications – 6  
 
Figure 2: Single-Common Configuration  
Dual-Common (SB-D) Switch Configuration  
The D configuration provides simultaneous connection of a bank of inputs to outputs (Figure  
3). The input A can be connected to 1A of 1B or …(N/2)A. In this dual-common configuration,  
channel connections are stepped in pairs. The channel displayed is the current channel pair (A  
and B). The number of channel pairs is equal to one-half of the total number of channels (N).  
Figure 3: Dual-Common Configuration  
Single Step Dual Common (SB-E) Switch Configuration  
This non-blocking configuration allows any input to be connected to any output, but at the  
same time, adjacent inputs align with adjacent outputs (Figure 4). This configuration allows for  
single-step movement of paired input channels (A and B). The channel connection displayed is  
B path; A input channel is connected to B path minus one.  
General Information and Specifications – 7  
 
Figure 4: Single-Step Dual-Common Configuration  
Dual-Common Blocking (SB-F) Switch Configuration  
This configuration allows one of the inputs to be aligned with an output in a blocking sense,  
with reduced output channel counts available (Figure 5).  
Figure 5: Dual-Common Blocking Configuration  
Key Features  
Up to 48 channels  
Typical insertion loss 0.4 dB  
Typical repeatability 0.003 dB  
Typical return loss 65 dB  
Local control and remote control via IEEE 488 and RS232 interfaces  
Applications  
Remote fiber test systems in telecommunication networks  
Fiberoptic component testing  
Transmitter/receiver measurement  
Research and development  
Standard Accessories  
AC power cord  
User’s manual  
Optional Accessories  
Rack-mount kit  
General Information and Specifications – 8  
 
Specifications  
The following optical specifications describe the warranted characteristics of the unit ( Table 2).  
Supplementary specifications describe the typical non-warranted performance of the unit  
(Table 3 and Table 4).  
Table 2: Optical Specifications  
Parameter  
Typical  
0.4 dB  
Maximum  
Insertion loss  
single-mode1  
multimode1  
0.7 dB  
0.6 dB  
0.3 dB  
Return loss  
single-mode2 standard/analog  
multimode3 standard/analog  
65 dB/>65 dB  
25 dB/35 dB  
60 dB/65 dB (minimum)  
20 dB/30 dB (minimum)  
Polarization dependent loss (single-mode) 0.02 dB  
0.05 dB  
Insertion loss stability4  
±0.03 dB  
±0.05 dB  
Repeatability5  
sequential switching  
random switching  
±0.003 dB  
±0.01 dB  
±0.005 dB  
±0.025 dB  
Crosstalk (single-mode)  
-100 dB  
300 mW  
-80 dB  
Input power (continuous wave)  
Channel options  
front-panel FC or ST connectors  
front-panel SC connectors  
5 m rear-panel pigtail  
20 (maximum)  
24 (maximum)  
48 (maximum)  
Switching time  
one channel  
each additional channel  
300 ms (typical)  
+12 ms (typical)  
1
2
3
4
Insertion loss does not include connectors. Include 0.2 dB (typical), 0.5 dB (maximum) for each connector.  
Excluding connectors.  
Values shown for 62.5 µm diameter maximum fiber core.  
Drift of any channel relative to one assigned reference channel at ±3 °C deviation of ambient temperature over  
a seven-day period.  
5
Optimum repeatability after one hour warm-up.  
General Information and Specifications – 9  
 
Table 3: Operating Specifications  
Local control  
Step-up, step-down channel selection  
Control of one external relay driver  
IEEE 488.1 address selection  
Return-to-local function  
Language selection  
Remote  
control  
GPIB interface:  
IEEE 488.1 1987 capability SH1, AH1, T6, L4, SR1, PP0, DC1, C0, E1  
RS232 interface:  
setting 8 bits, 1200 baud, 1 stop bit, no parity  
Command set Revised command set. Capable of emulating command set of JDS  
Uniphase SC-0 and SX-0 Series switch models.  
Drivers  
Eight open collector outputs, sink current 100 mA maximum per output  
(driver):  
Drivers 1, 2, 3, 4, +5V, and GND (ground) are accessible from back  
panel connector  
Drivers 5, 6, 7, and 8 are internal  
Driver 1 can also be controlled from the DRIVER1 key on the front panel  
Warm-up time1 1 hour at 25 °C ambient temperature  
1
Applicable for optimum repeatability performance.  
Table 4: Other Specifications  
Electrical  
Input voltage  
Power consumption  
Physical  
100 to 240 V AC, 50 to 60 Hz  
80 VA maximum  
Dimensions (W x H x D)  
standard  
21.2 x 8.9 x 35.5 cm  
48.3 x 8.9 x 35.5 cm  
with rack-mount kit1  
Weight  
3.75 kg  
Environmental  
Operating temperature  
Storage temperature  
Humidity  
0 to 55 °C  
-40 to 70 °C  
maximum 95% RH from 0 to 55 °C  
1
Rack-mount kit is optional.  
General Information and Specifications – 10  
 
Getting Started  
The SB Series Fiberoptic Switch consists of the switch unit and an AC power cord. The rack-  
mount kit is optional.  
Before Initializing and Operating the Unit  
Inspect the unit for any signs of damage.  
Read the user’s manual thoroughly, and become familiar with all safety symbols and  
instructions to ensure that the unit is operated and maintained safely.  
Initial Inspection  
Warning  
To avoid electrical shock, do not initialize or operate the unit if it bears any sign  
of damage to any portion of its exterior surface, such as the outer cover or  
panels.  
Check that the unit and contents are complete:  
1. Wear an anti-static wrist strap, and work in an electrostatic discharge (ESD) controlled  
area.  
2. Inspect the shipping container for any indication of excessive shock to the contents, and  
inspect the contents to ensure that the shipment is complete.  
3. Inspect the unit for structural damage that can have occurred during shipping.  
4. Connect the unit to a power source, using the AC power cord provided.  
5. Set the power switch to I (on) to initialize the SB switch. All key lamps and status LEDs  
light. If no malfunction is detected during power-up, all lamps and LEDs turn off and the  
display reads 0. If a malfunction is detected during the power-up sequence, an error  
message is displayed.  
6. Set the power switch to O (off), and disconnect the AC power cord from the power supply  
and from the unit.  
7. Keep the packaging.  
Immediately inform JDS Uniphase and, if necessary, the carrier if the contents of the shipment  
are incomplete, if the unit or any of its components are damaged or defective, or if the unit  
does not pass the initial inspection.  
Operating Environment  
In order for the unit to meet the warranted specifications, the operating environment must meet  
the following conditions for temperature, humidity, and ventilation.  
Getting Started – 11  
 
Temperature  
The unit can be operated in the temperature range of 0 to 55 °C.  
Humidity  
The unit can be operated in environments with up to 95% humidity (0 to 55 °C). Do not expose  
it to any environmental conditions or changes to environmental conditions that can cause  
condensation to form inside the unit.  
Ventilation  
The unit contains a built-in cooling fan. Do not install it in any location where the ventilation is  
blocked. For optimum performance, the unit must be operated from a location that provides at  
least 75 mm (3 inches) of clearance at the rear and at least 25 mm (1 inch) of clearance at the  
bottom. Blocking the air circulation around the unit can cause the unit to overheat,  
compromising its reliability.  
Warning  
Do not use the unit outdoors.  
To prevent potential fire or shock hazard, do not expose the unit to any  
source of excessive moisture.  
Storing and Shipping  
To maintain optimum operating reliability, do not store the unit in locations where the  
temperature falls below -40 °C or rises above 70 °C. Avoid any environmental condition that  
can result in internal condensation. Ensure that these temperature and humidity requirements  
can also be met whenever the unit is shipped.  
Claims and Repackaging  
Immediately inform JDS Uniphase and, if necessary, the carrier, if  
The contents of the shipment are incomplete  
The unit or any of its components are damaged or defective  
The unit does not pass the initial inspection  
In the event of carrier responsibility, JDS Uniphase will allow for the repair or replacement of  
the unit while a claim against the carrier is being processed.  
Returning Shipments to JDS Uniphase  
JDS Uniphase only accepts returns for which an approved Return Material Authorization  
(RMA) has been issued by JDS Uniphase sales personnel. This number must be obtained prior  
to shipping any material to JDS Uniphase. The owner’s name and address, the model number  
and full serial number of the unit, the RMA number, and an itemized statement of claimed  
defects must be included with the return material.  
Getting Started – 12  
 
Ship return material in the original shipping container and packing material. If these are not  
available, packaging guidelines are as follows:  
1. Wear an anti-static wrist strap and work in an ESD controlled area.  
2. Cover the front panel with a strip of cardboard.  
3. Wrap the unit in anti-static packaging. Use anti-static connector covers, if applicable.  
4. Pack the unit in a reliable shipping container.  
5. Use enough shock-absorbing material (10 to 15 cm or 4 to 6 in on all sides) to cushion the  
unit and prevent it from moving inside the container. Pink poly anti-static foam is the best  
material.  
6. Seal the shipping container securely.  
7. Clearly mark FRAGILE on its surface.  
8. Always provide the model and serial number of the unit and, if necessary, the RMA number  
on any accompanying documentation.  
9. Ship the unit only to the address given at the beginning of this document.  
Cleaning Connectors  
Caution  
Connecting damaged or dirty fibers to the unit can damage the connectors  
on the unit.  
Never force an optical connector. Some connectors have a ceramic ferrule  
that can easily be broken.  
Optical cable ends need to be cleaned before using them with the unit.  
The following items are required for cleaning:  
Filtered compressed air or dusting gas (for example, Tech Spray Envi-Ro-Tech Duster  
1671 gas, available from http://www.techspray.com/1671.htm)  
Lint-free pipe cleaners (for example, from 3M1) or lint-free swab  
Lint-free towels (for example, 10 x 10 cm or 4 x 4 in HydroSorb III wipers, available from  
http://www.focenter.com/acctech/hydrosobr_wipers.htm)  
Optical grade isopropyl alcohol or optical grade 200° ethanol (do not use rubbing alcohol,  
which contains 30% water)  
To clean the connectors:  
1 3M is a trademark of 3M.  
Getting Started – 13  
 
1. Blow the sleeve with filtered compressed air (Figure 6).  
Figure 6: Connector Cleaning (connector type can vary)  
2. Apply optical grade isopropyl alcohol or optical grade ethanol (do not use rubbing alcohol)  
to a small area of a lint-free towel and rub the end of the ferrule over the wet area.  
3. Wipe the ferrule on a dry area of the lint-free towel.  
4. Using the dusting gas or compressed air, blow the end of the ferrule.  
5. Apply the alcohol or ethanol to a lint-free pipe cleaner or swab and wipe off the remaining  
parts of the connector.  
6. With the other end of the pipe cleaner or swab, dry the areas cleaned.  
7. Using the dusting gas or compressed air, blow the areas cleaned.  
Installing the Switch  
Warning  
In sensitive applications, to avoid shock and vibration, do not mount the switch  
in non-rigid racks or on top of raised floors or tables. Avoid use with high-  
impact doors that lack impact-reducing bumpers upon closing.  
To install the switch:  
1. Place the SB switch into its intended operating location.  
2. Avoid blocking the ventilation holes at the back and at the bottom of the instrument.  
3. Do not pull on the fibers exiting through the rear-panel strain relief. Excessive force can  
damage the optics.  
4. Route the fiber cables in such a way as to avoid creating bends that have a radius of less  
than 1.5 cm; do not lay cables across sharp corners or tie bundles of cables together  
tightly.  
5. Reattach the AC power cord and reinitialize the switch.  
Getting Started – 14  
 
Operating and Maintenance Instructions  
Front Panel  
The front of the switch is shown in Figure 7.  
Figure 7: Front of the Switch  
Operating Keys  
The operating keys are described in Table 5.  
Table 5: Operating Keys  
Key  
Description  
I / O  
Turns the power on (I) and off (O)  
Toggles driver 1 on and off  
DRIVER 1  
GPIB ADDR  
Sets the switch to GPIB Address (IEEE 488.1) mode  
Returns the switch to Local mode from Remote mode  
Channel increment key  
LOCAL  
Channel decrement key  
Status LEDs  
The status LEDs are described in Table 6.  
Operating and Maintenance Instructions – 15  
 
Table 6: Status LEDs  
LED  
Description  
REM  
Indicates that the GPIB or RS232 interface is in Remote mode. All front-panel  
keys except Local are locked out.  
LOCK  
Indicates that the SB switch is in Local Lockout mode. This mode prevents the  
Local key from returning the SB switch to Local mode.  
ADDR  
SRQ  
Indicates that the GPIB interface is in talk or listen state  
Indicates that the interrupt logic of the SB switch has generated a service request  
interrupt on the GPIB interface  
Rear Panel  
The back of the switch is shown in Figure 8.  
Figure 8: Back of the Switch  
External Switch Module Connections  
External Switch Module without TTL Input Controls  
The setup for a switch without transistor-to-transistor logic (TTL) is shown in Figure 9.  
Operating and Maintenance Instructions – 16  
 
Figure 9: Switch Setup without TTL  
External Switch Module with TTL Input Controls  
The setup for a switch with TTL is shown in Figure 10.  
Figure 10: Switch Setup with TTL  
Sample Driver Application: Electrical Equivalent of Driver  
A sample driver application is shown in Figure 11.  
Operating and Maintenance Instructions – 17  
 
Figure 11: Sample Driver Application: Electrical Equivalent of Driver  
Caution  
Do not exceed 100 mA per driver.  
Powering Up the Switch  
To power up the switch:  
1. Connect the switch to the AC power source with the AC power cord provided.  
2. Set the power switch to I (on) to initialize the SB switch. All key lamps and status LEDs  
light. If no malfunction is detected during power-up, all lamps and LEDs turn off, and the  
display reads 0.  
Using and Selecting a Channel  
To use the switch:  
1. Connect a channel to the front of the switch (Figure 12).  
Figure 12: Using a Channel  
Operating and Maintenance Instructions – 18  
 
To select a channel:  
1. Press the or key to scroll to the channel number required. The switch mechanism  
advances to the channel when the key is released.  
In SB-C models (SB1CXXXXX+2XXXXXXXX), the channel number displayed is the current  
channel number connected to the common fiber C (the switch has one common fiber).  
In the SB-D models (SB2DXXXXX+2XXXXXXXX), the channel number displayed is the current  
channel pair (the switch has two common fibers).  
In the SB-E models (SB2EXXXXX+2XXXXXXXX), the channel number displayed is the  
channel connected to the common fiber B. The channel connected to the common fiber A is B  
- 1 (the switch has two common fibers).  
In SB-F models (SB2FXXXXX+2XXXXXXXX), the channel number displayed is the channel  
connected to the common fiber B. A blocked connection with B shows as an even-numbered  
channel and the connected channels with B show as odd-numbered. The path connected to  
common fiber A is B - 1.  
In all configurations, channel 0 is an open circuit, that is, the switch is in an unconnected state.  
Setting the GPIB Address  
Set the SB switch to GPIB mode to display and edit the GPIB address:  
1. Press the GPIB ADDR key. The current GPIB address is displayed.  
2. To change the address, press the or key to scroll to the required address.  
3. Press the GPIB ADDR key to store the new address. Or, to exit GPIB mode without  
changing the address, press the DRIVER 1 key.  
Setting the Interface Command Set for SC and SX Switches  
The SB switch can be set to emulate the interface command sets of earlier models of JDS  
Uniphase SC Series and SX Series switches.  
To set the interface command set:  
1. Press and hold the GPIB ADDR key while the SB switch powers up. The active interface  
command set is displayed.  
2. Press the key to scroll to the required command set, for example, SB, SC, or SX.  
3. Press the GPIB ADDR key to save the setting.  
Controlling the Drivers  
The SB switch has four drivers (drivers 1, 2, 3, and 4) for driving the external switch modules  
and four drivers (drivers 5, 6, 7, and 8) for driving internal switch modules in custom  
Operating and Maintenance Instructions – 19  
 
applications. All drivers are controlled by remote commands (use the Driver port at the back of  
the switch). Driver 1 can also be controlled locally by the Driver 1 key.  
To control driver 1 locally:  
1. Press the Driver 1 key to toggle driver 1 on and off for manual control. The status LED of  
the key is lit when on.  
Controlling the Switch Locally  
To operate the switch using the front panel:  
1. If the REM status LED is lit, press the Local key once to set the SB switch to Local mode.  
2. Press the or key to select the switch position required. In SB-E configurations, the  
display shows the common B switch position. Common A is set to the display reading  
minus one.  
3. To toggle external relay driver 1, press the Driver 1 key. This driver can be used to operate  
a 1x2 source select switch. The status LED key is lit when on.  
Controlling the Switch Remotely by GPIB Interface  
To control the switch by GPIB interface:  
1. Connect a user-supplied GPIB cable to the controlling computer and to the IEEE 488  
(GPIB) port at the back of the switch.  
2. Verify that the interface command set is set to SB and that the GPIB address is set to 7. To  
do this, turn the SB switch off and then on again. The display reads SB when set to SB  
mode. See the Setting the Interface Command Set section for instructions on changing  
the interface command set.  
3. At the computer that controls the GPIB, set the message terminating character sequence  
to carriage return and line feed (<CR><LF>), for example, ASCII character code 13, 10.  
The <CR><LF> characters must be appended to the end of any messages sent to the SB  
switch. Similarly, the switch appends these characters to all messages it returns.  
4. Send a sample command to the SB switch; for example, use an OUTPUT statement (or  
equivalent) to send the command CLOSE 10 at GPIB address 7. The channel setting  
changes to 10. Most programming languages automatically append the terminating  
sequence to the message.  
5. Send a sample query command, for example, CLOSE?; then use an INPUT statement to  
receive the message 10 from GPIB address 7.  
Controlling the Switch Remotely by RS232 Interface  
To control the switch by RS232 interface:  
1. Connect an RS232 cable to the RS232C port of the SB switch and to a computer.  
Operating and Maintenance Instructions – 20  
 
2. At the computer, initialize the serial port to 1200 baud, eight bit ASCII character code, one  
stop bit, and no parity. Use the following MS-DOS2 Qbasic program as an example:  
OPEN "COM2;1200,N,8,1" FOR RANDOM AS #1  
PRINT #1, "CLOSE 5"  
PRINT #1, "CLOSE? "  
INPUT #1,A$  
PRINT A$  
END  
Calibrating the Switch  
No calibration is required.  
Maintaining the Switch  
Clean the connector ends with a lint-free tissue and alcohol before every mating. See the  
Cleaning Connectors section.  
Clean the internal connectors and the panel-mounted connector bulkheads periodically or  
when high losses are suspected. The internal connectors can be accessed by removing the  
connector panel:  
1. Remove the retaining screws of the connector panel.  
2. Slowly pull the panel out to the full extent of its guide rails (Figure 13).  
Figure 13: Removing the Connector Panel  
3. Remove the connectors from the connector bulkheads.  
4. Clean the connector ends and the bulkhead mating sleeves with a lint-free tissue and  
alcohol.  
5. Reinstall the connectors into the bulkheads.  
2 MS-DOS is a registered trademark of Microsoft Corporation.  
Operating and Maintenance Instructions – 21  
 
6. Reinstall the connector panel, guiding the fibers back to ensure that they do not bend  
sharply.  
Operating and Maintenance Instructions – 22  
 
Programming Guide  
The following programming instructions for the SB switch are intended for users who are  
familiar with the GPIB interface and how to send or receive messages over a device. A  
detailed description of the GPIB interface is contained in ANSI/IEEE Std. 488.1-1987 IEEE  
Standard Digital Interface for Programmable Instrumentation, published by the Institute of  
Electrical and Electronics Engineers.  
The SB switch is equipped with a GPIB parallel interface and an RS232C serial interface. The  
switch accepts the same device dependent commands (commands that control the instrument)  
over either interface.  
The SB switch can be set to emulate the interface command sets, status reporting, and service  
request control of the SC Series and SX Series switches. The active interface command set is  
displayed when the switch is powered on. See the Setting the Interface Command Set  
section for instructions on changing the interface command set.  
GPIB Pin Assignment  
The GPIB pin assignment is shown in Figure 14.  
Figure 14: GPIB Pin Assignment  
Caution  
Tighten the connector lock screws by hand. Do not use a screwdriver.  
Setting the GPIB Address  
To display or edit the GPIB interface address:  
1. Press the GPIB ADDR key to set the switch to GPIB mode. The current GPIB address is  
displayed. (The factory-set GPIB address is 7.)  
2. To change the address, press the or key to scroll to the required address.  
Programming Guide – 23  
 
3. Press the GPIB ADDR key. The new address is activated and stored. To leave the GPIB  
address unchanged, press the Driver 1 key.  
GPIB Interface Functions  
The GPIB interface functions are listed in Table 7.  
Table 7: GPIB Interface Functions  
Mnemonic  
SH1  
Function  
source handshake, complete capability  
acceptor handshake, complete capability  
basic talker, serial poll, not addressed if MLA  
basic listener, not addressed if MTA  
service request capability  
AH1  
T6  
L4  
SR1  
RL1  
PP0  
DC1  
DT0  
C0  
remote/local, complete capability  
parallel poll, no capability  
device clear, complete capability  
device trigger, no capability  
controller, no capability  
E1  
electrical interface, open collector drivers  
RS232 Pin Assignment  
The RS232 pin assignment is shown in Figure 15.  
Figure 15: RS232 Pin Assignment  
RS232 Interface Specifications  
Table 8 lists the RS232 interface specifications.  
Programming Guide – 24  
 
Table 8: RS232 Interface Specifications  
Name  
transmitted data  
received data  
Symbol  
TxD  
Pin Number  
Signal Direction  
2
3
8
7
6
5
out  
in  
RxD  
RTS  
CTS  
DTR  
SG  
request to send  
clear to send  
out  
in  
data terminal ready  
signal ground  
out  
The data protocol is permanently set to 1200 baud ASCII character code, with eight bits per  
character, one stop bit, and no parity bit. The serial port of the controlling computer must be  
configured with the same settings.  
RS232 Driver Pin Assignment  
The RS232 driver pin assignment is shown in Figure 16.  
Figure 16: Driver Pin Assignment  
Caution  
Do not exceed 100 mA per driver.  
Operation and Query Commands  
Operation and query commands control instrument functions and are interface-independent.  
Command Parser Rules  
A command consists of a mnemonic (for example, CLOSE) and, if required, a data  
parameter. The mnemonic and the data parameter must be separated by at least one  
space.  
Parameters can be entered in various formats; for example, 10, 10.0, and 1.0e1 are all  
recognized as the same value.  
Commands can be sent in uppercase or lowercase characters.  
Programming Guide – 25  
 
A command is contained in a message, and messages can contain more than one  
command, each one separated by a semicolon (;). For example, CLOSE 6;XDR 2 1 <CR>  
<LF> contains two commands.  
All GPIB commands must end with the terminating sequence <CR> <LF>.  
All RS232 commands must be terminated with a single <CR> character.  
The input buffer of the switch can hold as many as 100 characters. If the buffer becomes  
full, the switch holds the handshaking line on the GPIB interface until space is available.  
Similarly, over the RS232 interface, the switch sets the Clear To Send line low. Any  
characters received after the line goes low are ignored.  
Commands are executed as they are parsed; consequently, a command can be executed  
before the entire message in which it is contained is received.  
The switch delays accepting new characters sent over the GPIB interface while the switch  
mechanism is moving, but no data are lost. The SB switch is always ready to accept  
characters over the RS232 interface.  
A query command is used to extract status information from the switch. For example,  
SRE? <CR> <LF> returns the contents of the status register.  
Multiple-command messages can contain only one query command. A query must be the  
last command in the message, for example, CLOSE 20; XDRS? <CR> <LF>.  
Operation Commands  
RESET  
Reset  
Returns the switch to the power-up state, for example, channel 0, relay drivers off.  
CLOSE i  
Closes the optical path represented by the integer i.  
XDR i k Driver Control  
Sets the specified external driver on or off.  
Set Optical Channel  
i = driver number (1 to 8)  
k = 1 (on)  
k = 0 (off)  
Programming Guide – 26  
 
XDRS i  
Drivers Control  
Sets all eight relay drivers according to the binary conversion of i. The binary weight of the  
drivers is as follows:  
Driver 1 = 1  
Driver 2 = 2  
Driver 3 = 4  
Driver 4 = 8  
Driver 5 = 16  
Driver 6 = 32  
Driver 7 = 64  
Driver 8 = 128  
Add together the weights of the drivers to be activated, and send the total. For example, when  
i = 255, all eight relay drivers are turned on.  
SRE i  
SQR Mask  
Writes a decimal number to the SRQ mask register (see the Status Reporting and Service  
Request Control section). Setting a bit to 1 generates an SRQ interrupt when the  
corresponding bit in the status register changes from 0 to 1.  
CSB  
Clear Status Byte  
Resets the status byte.  
CLR  
Clear Device  
Clears the SRQ mask register and the status register.  
Query Commands  
CLOSE?  
Optical Switch Path  
Returns the current optical path number. If the switch has two common input fibers (A and B),  
CLOSE? returns the position of fiber B. CLOSE? MAX returns the maximum channel number.  
XDR? i  
Driver  
Returns the state of an external relay driver (i).  
0 = relay driver is off  
1 = relay driver is on  
Programming Guide – 27  
 
XDRS?  
Returns the states of all drivers in a binary-coded integer.  
LRN? Learn  
Drivers  
Returns a string containing three commands that, if sent, reset the switch to its current state,  
for example, CLOSE i;XDRS k;SRE l, where i represents the current path number, k  
represents the states of the external drivers, and l represents the value of the service request  
enable register.  
STB?  
Returns a three-digit integer and automatically clears the status register if the SRQ bit is set.  
SRE? SRQ Mask  
Returns the contents of the SRQ mask register.  
CNB? Condition Register  
Returns the contents of the condition register.  
TST? Self-Test  
Status Register  
Executes a self-test operation. An error code that can be queried with ERR? or LERR? is  
placed in an error queue. The query TST? also sets bit 7 in the status register.  
0 = self-test passed  
1 = self-test failed  
ERR?  
Error Number  
Returns an error number if the self-test fails.  
330 = self-test failed  
0 = self-test did not fail  
LERR?  
Last Number Error  
Returns a three-digit error number from the error queue. The queue can contain as many as  
five error numbers. The first error read is the last error that occurred. LERR? returns 000 if the  
error queue is empty.  
Programming Guide – 28  
 
OPC?  
Operation Complete  
Returns the status of the input buffer.  
1 = the input buffer is empty, for example, all commands have been executed  
0 = the input buffer is not empty, for example, commands are still pending  
IDN?  
Identifier  
Returns a string that identifies the manufacturer, the switch series, and the firmware level, for  
example, JDS Uniphase, SB Switch, 2.00  
Status Reporting and Service Request Control  
The SB switch maintains three eight-bit registers that are used for status reporting and for  
enabling the GPIB service request interrupt:  
Condition register  
Status register  
SRQ mask register  
Condition Register  
The condition register monitors the current state of the switch mechanism (Table 9). Bit 2, the  
settled condition bit, is 1 when the switch mechanism has stopped at the desired channel and  
0 when the switch is moving to a new output channel. The CNB? query command returns the  
value of the condition register. When the settled bit is true, CNB? query returns 4.  
Table 9: Condition Register  
Condition Register  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
0
0
0
0
0
settled  
0
0
Status Register  
The status register records errors and other events that have occurred in the switch (Table 10).  
When an event occurs, the switch status logic sets the corresponding bit to 1. The status  
register can be read at any time because the bits stay set until the register is read at least  
once.  
Table 10: Status Register  
Status Register  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
self-test  
service  
syntax  
message  
0
settled  
0
parameter  
Programming Guide – 29  
 
error  
request  
error  
available  
error  
Bit 7 (self-test error) is set if a calibration error is detected after power-up or after the  
self-test query (TST?) is executed. At all other times it is 0.  
Bit 6 (service request) is set when the interrupt request logic of the switch detects a reason  
to generate a service request interrupt on the GPIB interface.  
Bit 5 (syntax error) is set when the parser detects a syntax error in a command mnemonic.  
Bit 4 (message available) is set when a message is available in the output buffer.  
Bit 2 (settled) is set when bit 2 in the condition register changes from 0 to 1.  
Bit 0 (parameter error) is set when a parameter value is out of the range of the SB switch.  
The status register can be read with the status register query (STB?) or by serial polling the  
GPIB interface. During power-up, the status register contains 0 and can only be read by serial  
polling. After initial power-up, only the settled bit (bit 2) is set to 1. The clear status byte  
command (CSB) and the clear device command (CLR) clear the status register. STB? also  
clears the status register, but only if the service request bit (bit 6) is set to 1.  
SRQ Mask Register  
The SRQ mask register unmasks specific events in the status register that generate service  
request interrupt on the GPIB interface (Table 11). The SRQ mask command (SRE) writes to  
the SRQ mask register. When a bit in the SRQ mask register is set to 1, the interrupt logic of  
the switch monitors the corresponding event bit in the status register. When a bit changes from  
0 to 1, a service request interrupt is generated and bit 6 in the status register is set.  
Table 11: SRQ Mask Register  
SRQ Mask Register  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
self-test  
error  
n/a  
syntax  
error  
message  
available  
n/a  
settled  
n/a  
parameter  
error  
The SRQ mask register can unmask more than one event at a time. The first unmasked event  
to change from 0 to 1 causes an interrupt. To acknowledge this interrupt, the GPIB interface  
can be serial polled or the status register can be read with STB?. The first time the SB switch  
is serial polled after an SRQ is generated, bit 6 is on. Subsequent serial polling returns a value  
with bit 6 off. Similarly, STB? returns the status register with the SRQ bit set, but then the  
switch logic automatically clears the register. As a result, subsequent STB? queries return 0.  
The SRQ mask register is cleared by powering up the SB switch, by the clear device command  
(CLR), or by the universal device clear command (DC1).  
GPIB Programming Examples  
This section provides programming samples for controlling the SB switch over the GPIB  
interface. The samples were written in MS-DOS Qbasic and run on a personal computer  
Programming Guide – 30  
 
equipped with a National Instruments3 GPIB interface board, with National Instruments  
Universal Language Interface drivers loaded. The commands that control the GPIB are similar  
to Hewlett Packard4 HP Basic commands. Most other controller board manufacturers provide  
basic output and input statements for communicating messages to a GPIB instrument.  
Before using any of these samples, ensure that the GPIB address is set to 7, the interface  
command set is SB, the ULI.EXE driver is loaded, and the switch is connected to the computer  
via a GPIB cable.  
The GPIB commands provided in this section do not always show the terminating sequence  
<CR><LF>; however, it is implied.  
Sending Commands  
This example sets the SB switch to channel 6 and turns on all the external relay drivers.  
' set up the interface card and drivers  
OPEN "GPIB0" FOR OUTPUT AS #1  
OPEN "GPIB0" FOR INPUT AS #2  
PRINT #1, "ABORT"  
' set terminating character to CR LF sequence  
PRINT #1, "GPIBEOS OUT CR LF"  
PRINT #1, "GPIBEOS IN CR LF"  
' sample commands"close 6; xdrs 255"  
PRINT #1, "OUTPUT 07;CLOSE 6;XDRS 255"  
' sample queries  
PRINT #1, "OUTPUT 07;CLOSE?"  
PRINT #1, "ENTER 07"  
INPUT #2, a  
PRINT "channel ",a  
PRINT #1, "OUTPUT 07;XDRS?"  
PRINT #1, "ENTER 07"  
INPUT #2, a  
PRINT "driver state ",a  
END  
Serial Polling the Status Register  
This example changes the channel setting and reads the status register continuously until the  
output has settled.  
PRINT #1, "OUTPUT 07;csb"  
bit  
' clearing the status byte clears the settling  
PRINT #1, "OUTPUT 07;CLOSE 12"  
sr = 0  
WHILE ((sr AND 4 ) =0)  
PRINT #1, "SPOLL 07"  
INPUT #2, sr  
' change channel  
' initialize sr variable to enter the while loop  
' loop until settled bit is true  
' serial poll SB switch  
3
National Instruments is a trademark of National Instruments.  
Hewlett Packard is a registered trademark of Hewlett-Packard Co.  
4
Programming Guide – 31  
 
WEND  
PRINT sr  
END  
' print final value of sr  
Generating a Service Request Interrupt  
This example tests the service request interrupt function. It unmasks the settled bit in the  
SRQ mask register and selects a channel. An interrupt is generated when the switch reaches  
the channel.  
ON PEN GOSUB SPOLL  
PEN ON  
' enable SRQ interrupt  
PRINT #1, "OUTPUT 07;CSB;SRE 4"  
' clear status register and unmask  
' settled bit in SRQ mask register  
' change channel  
PRINT #1 "OUTPUT 07;CLOSE 6"  
' More code executed while switch channel set  
'
'
WHILE (INKEY$ = "")  
WEND  
' endless loop to simulate bigger program  
' ends when any key is pressed  
PEN OFF  
END  
SPOLL:  
PRINT #1, "SPOLL 07"  
INPUT #2, sr  
PRINT sr  
' serial poll the switch  
' read status register  
' verify SRQ bit is set  
PRINT #1, "SPOLL 07"  
INPUT #2, sr  
PRINT sr  
' serial poll again to verify SRQ bit is now cleared  
' read status register  
RETURN  
Learn Query (LRN?)  
This example demonstrates the use of the learn query.  
DIM LEARN$[100]  
PRINT #1, "OUTPUT 07;LRN?"  
' send the learn query command  
PRINT #1, "ENTER 07"  
LINE INPUT #2, LEARN$  
' The above variables can be saved in a data file before quitting the program and  
' then later read back and used to restore the switch to a same state.  
' Like this...  
PRINT#1, "OUTPUT 07;"LEARN$  
' SB settings are now restored  
END  
RS232 Programming Examples  
This section provides programming examples for controlling the SB switch over the RS232  
interface. The examples were written in MS-DOS Qbasic and run on a personal computer  
Programming Guide – 32  
 
equipped with a serial port. COM port 2 of the computer is designated as the serial port and is  
connected to the switch.  
Before using any of these examples, ensure that the active interface command set is SB.  
The RS232 interface cannot receive an SRQ interrupt.  
The RS232C commands that appear in this section do not always show the terminating  
character <CR>; however, it is implied.  
Sending Commands  
OPEN "COM2:1200,N,8,1" FOR RANDOM AS #3  
A = 10  
PRINT#3, "CLOSE ";A  
PRINT#3, "XDRS 255"  
END  
Querying Status  
This example queries and displays the current channel setting.  
PRINT#3, "CLOSE?"  
INPUT#3, A  
PRINT A  
END  
Reading the Status Register  
The serial polling function is not supported on any RS232 interface, but STB? can be used to  
query the status register since the query command performs the same function as serial  
polling.  
This example changes the channel setting and reads the status register continuously until the  
output has settled.  
OPEN "COM2:1200,N,8,1" FOR RANDOM AS #3  
PRINT#3, "CSB"  
PRINT#3, "CLOSE 5"  
DO  
' clear status register  
' loop until motor settles  
PRINT#3, "STB?"  
INPUT#3, SR1  
LOOP UNTIL (SR1 AND 4)  
PRINT SR1  
END  
Setting the Interface Command Set  
The SB switch can be set to emulate the interface command sets of earlier models of JDS  
Uniphase SC Series and SX Series switches.  
Programming Guide – 33  
 
To change the command set:  
1. Press and hold the GPIB ADDR key while the SB switch powers up. The active interface  
setting is displayed.  
2. Press the key to scroll to the required command set, for example, SB, SC, or SX.  
3. Press the GPIB ADDR key to save the setting.  
SC Series Switch Command Set (SCXXX-0XXX Models)  
The syntax and functions for the SC series switch commands are provided in Table 12.  
Table 12: SC Switch Command Set  
Syntax  
AnE  
FE  
Function  
switch to channel n  
verify channel  
XE  
turn external driver on  
turn external driver off  
YE  
Response messages (Table 13) are formatted as qn, where q is the switch status (A = normal,  
I = syntax error, C = calibration error), and n is the channel number.  
Table 13: Response Messages for SC Switch Commands  
Status Byte Register  
Bit 7  
Bit 6  
0
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Message  
BUSY  
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
0
1
1
1
1
0
NORMAL  
RQS  
RQS  
RQS  
CAL ERROR  
BAD DATA  
UNIT FAILURE  
SX Series Switch Command Set  
The syntax and functions for the SX Series switch commands are provided in Table 14.  
Programming Guide – 34  
 
Table 14: SX Switch Command Set  
Syntax  
Function  
An  
Sn  
Cn  
Bk  
E
switch to channel n  
set driver n  
clear driver n  
configure drivers with binary code k  
enable unit to assert SRQ interrupt after completing each command  
disable SRQ interrupt except when an error occurs  
D
R
remote mode: lock out front panel keys;  
not implemented in SB switch (RS232 only)  
L
local mode: enable front panel keys;  
not implemented in SB switch (RS232 only)  
Response messages (Table 15) are formatted as qn Rm, where q is the unit status (A =  
normal, C = command error, S = system error); n is the channel number (0 to N); R is the letter  
R; and m is the state of the external relay drivers (0 to 255).  
Table 15: Response Messages for SX Switch Commands  
Status Byte Register  
Bit 7  
Bit 6  
RQS  
RQS  
RQS  
RQS  
Bit 5  
Bit 4  
Bit 3  
Bit 2 Bit 1  
Bit 0  
Message  
BUSY  
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
1
0
NORMAL  
BAD DATA  
UNIT FAILURE  
These bits are usually set to 0. Bit 6 (RQS) is set to 1 when the SB switch generates a service  
request interrupt.  
Programming Guide – 35  
 

Graco High Chair PD162117B User Manual
Graham Field Camping Equipment AQ1000 AQ2000 User Manual
Hotpoint Microwave Oven JES636 User Manual
Hotpoint Microwave Oven MW12P User Manual
Hotpoint Refrigerator FFA46W User Manual
Hotpoint Ventilation Hood HTN40 User Manual
HP Hewlett Packard Calculator scientific calculator User Manual
Husqvarna Lawn Mower 216 User Manual
Husqvarna Trimmer HEDGE TRIMMER ATTACHMENT User Manual
Image Treadmill IMTL99600 User Manual