MLS MLSH041 Manual de Instalação descarregar pdf (Página 13)

ALIGNMENT AND TROUBLESHOOTING PROCEDURES LBI-38425A

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

between +2 and +8 dBm.

NOTE: Refer to Figure 6 for location of tuning and adjustment controls

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MLS MLSH041 Manual de Instalação Página 13

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