Repair procedures, tests, and adjustments
64 Manpack Transceiver 2110 series Repair Guide
1 Switch the 0208 speaker to Speaker.
1 Return the antenna to the 50 connector ( ).
1 Return the Cfg Auto Tune Mode to ATU/50 Ohm/Codan.
1 Return to the Repair flowchart (see Figure 29 on page 95).
Performing the Sensitivity test
To test the sensitivity of the transceiver to received signals:
1 Set up the equipment (see page 56, Setting up the test equipment).
1 Select a channel to test, preferably near the centre of one of the designated bands
(see page 60, Examining the profile in the transceiver).
1 Adjust the volume via the front panel to full volume.
1 Set the RF signal generator to 1.0 kHz above the SCF of the selected USB channel
or 1.0 kHz below the SCF of the selected LSB channel.
1 Switch off the RF output from the RF signal generator.
1 Set the 0 dB reference on the AC voltmeter to the level of the background noise
(approximately –28 dBm).
1 Set the RF output level of the RF signal generator to –120 dBm.
1 Switch on the RF output from the RF signal generator.
1 Record your results and actions (see page 109, Test sheet for the 2110 series
Manpack Transceiver).
1 Switch off the RF pre-amp in the transceiver.
1 Repeat the test, this time setting the 0 dB reference on the AC voltmeter to the level
of the background noise (approximately –31 dBm).
1 Set the RF output level of the RF signal generator to –114 dBm.
1 Switch on the RF output from the RF signal generator.
1 Record your results and actions (see page 109, Test sheet for the 2110 series
Manpack Transceiver).
1 Switch off the RF output from the RF signal generator.
1 Switch on the RF pre-amp in the transceiver.
1 Return to the Repair flowchart (see Figure 29 on page 95).
NOTE Meter damping may be required in noisy environments.
Pass A reading on the AC voltmeter that is an increase of > 10 dB from
the 0 dBm reference point.
Pass A reading on the AC voltmeter that is an increase of > 10 dB from
the 0 dBm reference point.
To Next Page
Loading...
Need help?
General
