Skanti TRP 9250, Technical Manual, Page: 175 / 289

SELF TEST INTRODUCTION
The ’SELF TEST’ BITE (Built-In Test Equipment) of the TRP 9250 is used as a fault diagnosing
tool for the service technician. It may also be used by the operator to obtain additional information
on a problem when ordering service.
The ’SELF TEST’ checks the vital functions of the TRP 9250 by performing and monitoring a
sequence of operations. The program controls the analog and digital set ups necessary to perform
each test step in the line of tests executed during the ’SELF TEST’. These set ups will result in a
digital feed back from the ’Check Detectors’ located on most of the PCBs in the TRP 9250. The
test-result from each test step will be displayed on the Receiver display of the Transceiver Control
Unit
SELF TEST DESCRIPTION
The self test is performed in two different modes : ’Automatic Mode’ and ’Manual Mode’.
’Automatic Mode’ is used for verification of all functions, except the ones where PA power is applied.
All tests will automatically be performed succesively until the last test has passed or an error
condition has occurred.
The ’Manual Mode’ is used to test the transmitter or for service purposes. In this mode the tests
are performed one by one. Tests may be repeated several times giving a technician the opportunity
to make measurements.
A ’Self Test’ should always be initiated in ’Automatic Mode’ as this will start the test at ’Test 1’ and
automatically proceed until an error is encountered. Note. If a ’Self Test’ is started in ’Manual Mode’
on an arbitrary test number this may provide false indication to where the problem lies as the ’Self
Test’ assumes that all previous test numbers has been performed and found OK.
During the ’Self Test’ the test number is displayed in the ’RX’ display and the test result is displayed
in the ’TX’ display. "Passed" is displayed when the test has passed and "Bypass" is displayed if the
module to test is optional and not installed. If an error is encountered the ’TX’ display shows an
’Error Code’. Explanations to the ’Error Codes’ are listed on the following pages.
RX display
3 types of test result may be
displayed for each test step:
1. This test is OK. TX display
2. This test has failed.
Refer to Error Code description.
3. This test is not performed because
the module to be tested is not installed.
SELF TEST SERVICE
TRP 9250 TECHNICAL MANUAL 5-25