Operating Manual for COMMUNICATIONS SERVICE MONITOR

Self tests and acceptance tests
Self tests
Contact Function Contact Function
1 Data I/O 1 13 Data I/O 5
2 Data I/O 2 14 Data I/O 6
3 Data I/O 3 15 Data I/O 7
4 Data I/O 4 16 Data I/O 8
5 EOI 17 REN
6 DAV 18 Pair with 6
7 NRFD 19 Pair with 7
8 NDAC 20 Pair with 8
9 IFC 21 Pair with 9
10 SRQ 22 Pair with 10
11 ATN 23 Pair with 11
12 Ground shield 24 Logic ground
12 1
24 13
OPERATING MANUAL 2945A
Fig. 2-5 IEEE488 parallel port connections (as seen facing panel)
The service monitor incorporates a self test program which allows users to verify its condition at
any time. This program is described below.
When it is necessary to prove that the performance of the Service Monitor meets the published
performance data, the Acceptance tests, described in Chapter 5, should be carried out.
The built in Self Test program measures the output parameters of the RF generator using the
transmitter test functions. The RF generator output is coupled internally and no external
connections are required.
The self test program is accessed through the help/set-up menu and comprises 17 tests, which are
listed on the display when the [Self Test] key is pressed.
Before running the program, the Service Monitor should be reset to the factory preset state. This is
done by pressing the [MEM] key, to display the STORE/RECALL screen and menu. The message
’Recall Store No ’is shown. key in and enter the digits ’01’. The Service Monitor will now be ready
to run the self test program.
To run the program the [GO] key is pressed and the tests are carried out consecutively. The legend
‘ACTIVE’ is displayed against each test as it is carried out, which changes to ‘PASS’ or ‘FAIL’ as
each test is completed. If a particular test fails, the reason is given alongside the ‘FAIL’ legend,
together with the measurement.
The tests carried out, the related set-ups and the functions verified are listed below.
Test No 1 Broadband power. 500 MHz
Test No 2 Transmitter Frequency. 500 MHz
Test No 3 Broadband power. 1 GHz
Test No 4 Transmitter Frequency. 1 GHz
Test No 5 Broadband power. 10 MHz
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