Comnet MLS II MLSH041, Руководство по обслуживанию

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ALIGNMENT AND TROUBLESHOOTING PROCEDURES LBI-38425A
13
5.1.2 TX VCO & RX VCO Alignment
STEP
METERING
POINT
TUNING
CONTROL
METER
READING PROCEDURE
1 TP201 Control
Voltage
Monitor
CV202 4.0 VDC
7.0 VDC
In case that highest transmit
frequency is < 156.8 MHz
.
Select lowest frequency transmit
channel. With 50 ohm load on the
antenna connector J1, key the
radio. Monitor TP201 with digital
voltmeter and tune CV202 for 4.0
VDC ±0.1 V. Unkey the radio.
In case that highest transmit
frequency is 156.8 MHz.
Select
highest frequency transmit
channel. With 50 ohm load on the
antenna connector J1, key the
radio. Monitor TP201 with a
digital voltmeter and tune CV202
for 7.0 VDC ±0.1 V. Unkey the
radio.
2 TP201 CV201 7.0 VDC Select the highest frequency
receive channel. Monitor TP201
with digital voltmeter and tune
CV201 for 7.0 VDC ±0.1 V.
3 TP201 3.5-7.5 VDC Select lowest frequency channel.
Voltage should be between 3.5 –
7.5 VDC transmit and receive for
lowest and highest frequency
channels.
4 J201 +2 to +8 dBm RX/EX injection level should be
b2 and +8 dBm.
NOTE: Refer to Figure 6 for location of tuning and adjustment controls
.