Raymarine Apelco 5200, Руководство пользователя

Страница: 31 / 49

PLL Adjustment (TRANSMITTER/RECEIVER)
1) Connect the power supply (13.6 A)to the power line and the PTT switch to the micro-
phone terminal.
2) Connect a digital voltmeter or high impedance tester (positive lead to negative to
ground) and adjust on the RF module as shown in Table 5-l (See Fig 5-2)
Sequence
Item Condition point Adj. volt.
1
TX transmit CH.60 USA
3.5
0.1 Vdc
RX receive CH.60
check for
R X
receive CH.WXO
---
check for
Table 5-l
53.2 Frequency Adjustment (TRANSMITTER)
1) Connect the coupler output to a frequency counter, set the radio on
key
the transmitter,
and read the indication on the frequency counter.
2) Adjust trimmer capacitor on the RF module for the desired
Hz on the frequency counter.
5.3.3 Modulation Adjustment (TRANSMITTER)
1) Connect the coupler output to an FM linear detector.
Connect an audio oscillator to the microphone connector and key to
the transmitter,
2) Set the audio oscillator output to-20 Hz and adjust RV 3 on the RF module for a
deviation of 4.5 KHz 300 Hz.
3) Set the audio oscillator output to 43 KHz and read the deviation meter KHz
KHz).
23