Service manual

ALIGNMENT PROCEDURE AND PERFORMANCE TESTS
7-6
April 2001
Part No. 001-9800-203
3. Remove the top cover. Connect a DC voltmeter to
J201, pin 19
(see Figure 7-4).
4. Set the generator output level for –80 dBm (22 µV)
at the antenna jack. Manually adjust L213 and L215
for a maximum meter reading.
5. Set the generator output level for –47 dBm (1.0 mV)
at the antenna jack. Connect the DC voltmeter to
J201, pin 20
. Manually adjust L218 for a meter
reading of 2.9 V ±0.1 V.
7.3.9 SQUELCH LEVEL ADJUST
The tune software automatically detects if the
transceiver has the improved RSSI squelch or standard
squelch and then selects the applicable squelch tuning
procedure (see “NOTE” in Section 7.2.1). Proceed as
follows:
1. Manually select “Squelch Adjustments” or
automatically select “Receiver Squelch Setting”.
2. Connect an RF signal generator to the antenna jack
(see Section 7.1.3). Set the generator output for the
displayed frequency, output level, and modulation.
3. Connect a 4.7-ohm speaker load to the external
speaker jack as shown in Figure 7-1. Connect a
SINAD meter across the load (make sure it has
floating inputs).
4. Adjust the volume control to approximately 1/3 of
maximum. Adjust the generator output level for
SINAD level indicated on the screen.
5. Follow the instructions on the screen to complete
the squelch adjustment.