When instrument modules are being installed, the mainframe should be turned off and unplugged from its power source. Damage to the module's circuitry may occur if the module is installed while the mainframe is receiving power.
DO NOT PRESS ON MODULE COMPONENTS. Use care when handling the 91A04A and 91AE04A modules or the circuitry may be damaged.
FIRMWARE COMPATIBILITY
91 A04A modules only operate in a mainframe containing firmware version 1.11 or higher. The firmware version of the mainframe can be found in the upper right-hand corner of the DAS power-up menu. If your DAS does not contain firmware version 1.11, contact your Tektronix representa-tive for a firmware update kit.
91 AE04A modules operate with 91 A04 modules in mainframes containing firmware versions 1.11 or lower. 91 AE04A modules operate with 91 A04A modules in mainframes containing firmware version 1.11 or higher.
Operating Instructions--DAS9100 Series 91A04A/91AE04A Service
CONFIGURATION REQUIREMENTS
The power and configuration requirements for 91 A04A, 91 A04, 91 AE04A and 91 AE04 modules are as follows:
1 . Only one 91 A04A or 91 A04 module may be operated in the mainframe at one time.
2. Because of the power consumption of the 91 A04A and 91A04 modules, a 91 A04A or 91A04 module can only share a +5 V Power Supply with the modules indicated in Table 3-1. These modules may also share their supply with an empty slot. Table 3-1 also has a sample list of modules that draw too much power to share a supply with a 91 A04A or 91 A04 module.
Table 3-1 91A04A AND 91A04
+
5 V POWER SUPPLY RESTRICTIONSDescription Module
Modules that can share a +5 V Power Supply with a 91A04A or 91A04 91A08 91P32 91AE24 Some modules that cannot share a
+
5 V Power Supply with a 91 A04A or 91 A04 91 AE04A91AE04 91A24 91A32 91P16
~
The 91A04A or 91A04 may only share a power supply with one of the three modules declared acceptable in Table 3-1. Otherwise, neither module sharing the supply will operate correctly.
When positioning modules around the 91 A04A or 91 A04, be sure to allow for the power supply restriction. One possible positioning of 91 A04A and 91 AE04A modules is shown in Table 3-2.
You can see which power supplies are present in the mainframe by checking the chrome pins visible through the power supply area cover.
3-3
Table 3-2 91A04A AND 91AE04A SAMPLE BUS SLOT PLACEMENT
Bus Slot Module
o
1 2 3 4 5 6 7
Controller
91 A24 Data Acquisiton Module 91 AE24 Data Acquisition Module 91 AE24 Data Acquisition Module 91 A04A Data Acquisition Module 91 AE04A Data Acquisition Module 91 AE04A Data Acquisition Module Trigger/Time Base Module
Note that the 91 A04A module is sharing its power supply with a 91 AE24. Also note that both 91 AE04A modules are on the same side of the 91 A04A module.
Word Recognizer and Clock Cables
Each 91 AE04A module comes with two 3-inch coaxial cables. These cables are used to transmit word recognition and clock signals between master 91 A04A or 91 A04 modules and expander 91 AE04A and 91 AE04 modules. The cables must be correctly attached for the expander modules to work properly.
Figure 3-1 illustrates how to attach these coaxial cables.
Connecting the Cables to the 91AE04A or 91AE04. Attach the two cables to the two coaxial con-nectors located on top of the 91 AE04A and 91 AE04 modules.
The connector on top and closest to the front of the module (J141) is for word recognition signals.
The connector on top and toward the rear of the module (J138) is for clock signals.
Connecting the Cables to the 91 A04A or 91A04. Attach the cables to the six coaxial connectors located on top of the 91 A04A or 91 A04 module.
The three connectors on top and toward the front of the 91 A04A or 91 A04 module (J145, J143, and J141) are all for word recognition signals. Plug the cable that is attached to the forward connector of the expander 91 AE04A or 91 AE04 module into one of these three connectors.
The three connectors on the top and toward the rear of the 91 A04A or 91 A04 module (J138, J135 and J131) are all for clock signals. Plug the cable that is attached to the rear connector of the ex-pander 91 AE04A or 91 AE04 modules into one of these three connectors.
91 A04A and 91 A04 modules provide enough connectors for a total of up to three 91 AE04A or 91AE04 modules.
Operating Instructions--DAS9100 Series 91A04A/91AE04A Service
91AE04A
1 '
-WORD RECOGNIZER
CLOCK
\.
4676-01
Figure 3-1. Connecting the word recognizer and clock cables between the 91A04A and 91AE04A modules.
Threshold Cables
All 91 AE04A and 91 AE04 expander modules come with one 3.5-inch jumper cable that is used to obtain threshold information from the master 91 A04A or 91 A04 module.
NOTE
You only need to connect the threshold cables if you have
a
91AE04 (non-A version) module in your system.These threshold cables are attached in a daisy-chain fashion, going from the 91 AE04A or 91 AE04 expander module positioned farthest from the master to the next expander module, then to the next expander module, and finally to the master module.
Attach the first cable in the chain to J125 Pin 3 of the 91 AE04A or 91 AE04 expander module posi-tioned farthest from the master, and to J125 Pin 2 of the second expander module (going toward the master). Attach the second cable to J125 Pin 3 of the second expander module and to J125 Pin 2 of the third expander module (the module nearest the master). Attach the third cable to J125 Pin 3 of the third expander module and to J125 Pin 1 of the master 91 A04A or 91 A04.
Figure 3-2 illustrates how the threshold jumper cables are connected. This illustration shows one master 91 A04A module and three expander 91 AE04A modules.
3-5
3-6
Figure 3-2. Connecting the threshold jumper cables.
Required Adjustments
91 A04A modules, 91 AE04A modules, and certain 91 AE04 modules require some adjustment when they are first installed in a mainframe. These adjustments tune the modules to operate with the mainframe and with the other 91 A04-type modules.
If your modules were installed in their mainframe at the factory, they arrived properly adjusted. If you received modules that were not installed in a mainframe, you must perform these adjustments yourself. Table 3-3 indicates conditions in which the adjustments must be performed.
NOTE
91A04A, 91AE04A, and 91AE04 specifications are not guaranteed unless all adjustments are properly performed.
The 91 AE04A and 91 AE04 adjustments require a 3.S-digit digital multimeter. The adjustment procedure for all three modules is given in Module Adjustment Procedures at the end of this section.
Operating Instructions--DAS9100 Series 91A04A/91AE04A Service
Table 3-3
MODULE ADJUSTMENT CONDITIONS
Module Name Conditions Requiring Adjustment 91 A04A 91 A04A just installed in mainframe,
or 91 A04A, that was previously operating alone, is operated with expanders,
or 91 A04A, that was previously operating with expanders, is operated alone.
91 AE04A 91 AE04A just installed in mainframe,
or 91AE04A has changed its +5 V Power Supply,
or the master module has changed its + 5 V Power Supply 91 AE04 with se- 91 AE04 just installed in mainframe,
rial number be- or 91 AE04 clock cable connection changed,
low 8010118 or 91 AE04 driven by a new master 91 A04A or 91 A04 module,
or the 91 AE04 has changed its + 5 V Power Supply, or the master module has changed its + 5 V Power Supply