MLS MLSH041 Manuale di Installazione Scaricare il pdf (Pagina 14)

LBI-38425A ALIGNMENT AND TROUBLESHOOTING PROCEDURES

5.1.3 Transmitter Frequency Adjustment

STEP

METERING

POINT

TUNING

CONTROL

METER

READING PROCEDURE

NOTE

This step assumes the frequency

is measured when the

transmitter is first keyed. If

delayed, the rapidly rising

ambient temperature must be

taken into consideration. The

Oscillator frequency should be

set at 25°C ambient

temperature.

1 J201 (or J1) FREQ TRIM

Control on

TCXO

(XU201)

Channel

Operating

Frequency

Press the PTT switch while

monitoring RX/EX injection

frequency at J201. Adjust FREQ

TRIM Control on TCXO

(XU201) for the assigned channel

frequency ±0.5 PPM.

Figure 6 – Synthesizer Adjustment

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MLS MLSH041 Manuale di Installazione Pagina 14