Operating instructions

INSTALLATION
2-10
Self tests and acceptance tests
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.
Self tests
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 consists of 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
Test No 6
Transmitter Frequency. 10 MHz
The above tests compare the generated power and frequency against the broadband power meter
and the frequency meter at each of the frequencies specified.
Related set-up. Manual tune
The functions verified by the above tests are:-
Signal generator frequency and level accuracy.
Power meter accuracy.
Test No 7 to 14
Narrow band power meter. Power level +10 dBm. (Test No 7) to -60 dBm. (Test No 14)
These tests compare the generated power levels against the narrowband power meter readings.
Related set-ups. Frequency, 10 MHz, IF Bandwidth, 30 kHz.
The functions verified by the above tests are:-
Signal generator level accuracy.
Signal generator attenuators.
Spectrum analyzer level accuracy.
Receiver attenuators.