Service manual

Functional Verification Test
The Functional Verification Test for the multiplexer modules consists of
sending the
*IDN? command and checking the response. This test can be
used to verify that the multiplexer is connected properly and is responding
to a basic command.
Procedure 1. Verify that the multiplexer is properly installed in mainframe
2. Verify that the mainframe has passed its power-on test.
3. Send
*IDN? to the multiplexer (see example following)
4. The return should be as follows (revision number may vary):
HEWLETT-PACKARD,SWITCHBOX,0,A.06.00
NOTE If the primary address setting, secondary address setting, or the interface
select code is set incorrectly, the multiplexer will not respond. Verify
proper address selection before troubleshooting.
Example An example follows which uses an HP 9000 Series 300 computer with
HP BASIC and a multiplexer address of 70914.
10 DIM A$[100]
20 OUTPUT 70914;"*IDN?" !Send the ID query command
30 ENTER 70914;A$ !Get response
40 PRINT A$ !Print response
50 END
Operation Verification Test
The procedures in this section are used to provide a high level of confidence
that the multiplexer is meeting published specifications. The Operation
Verification Test is a subset of the Performance Verification Tests and is
suitable for checkout after performing repairs.
The Operation Verification Test is performed by completing the Closed
Channel Resistance Test (Test 2-1) as described in the Performance
Verification Test procedures. This test is usually sufficient to verify that the
multiplexer is meeting its specifications.
22 Verification Tests Chapter 2