Codan 2110 series, Руководство по ремонту

Страница: 95 / 164

Repair procedures, tests, and adjustments
Manpack Transceiver 2110 series Repair Guide 63
Receive tests
Performing the Basic Receive test
To test if the transceiver can receive:
1
Set up the equipment (see page 56, Setting up the test equipment ).
1
Select a channel to test.
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
Set the RF output level of the RF signal generator to –20 dBm.
1
Switch on the RF output from the RF signal generator.
1
Switch the 0208 speaker to
Load
.
1
Adjust the volume via the front panel to full volume.
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 the 0208 speaker to
Speaker
.
1
Return to the Repair flowchart (see Figure 29 on page 95 ).
Performing the Antenna Tuner test (receive)
To test the antenna tuner in receive:
1
Set up the equipment (see page 56, Setting up the test equipment ).
1
Connect the signal generator to the antenna stud on the front panel of the transceiver
using a BNC-to-banana plug/clip adaptor and the screw-on adaptor.
1
Set the Cfg Auto Tune Mode to
ATU
.
1
Select a channel in Band 1 (see page 60, Examining the profile in the transceiver ).
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 the 0208 speaker to Load .
1
Adjust the volume via the front panel to full volume.
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.
Pass A 1 kHz tone is audible from the 0208, –6 dB at full volume.
Pass A reading on the AC voltmeter that is approximately –20 dBm.