Plladjusment; Frequency Adjustment; Modulation Adjustment - Raymarine Apelco 5200 User Manual

1) Connect the power supply (13.6 V,lO 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 TPl negative to
ground) and adjust Tl on the RF module as shown in Table 5-l (See Fig 5-2)
Item
Sequence
TX
1
RX
R X
53.2 Frequency Adjustment (TRANSMITTER)
1) Connect the coupler output to a frequency counter, set the radio on CH16(156800MHz),
key and read the indication on the frequency counter.
the transmitter,
2) Adjust trimmer capacitor CVI on the RF module for the desired frequency(l56800MHz)
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
2) Set the audio oscillator output to-20 dBm,300 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 dBm,l KHz and read the deviation meter (k2.8 KHz
KHz).
Condition
transmit CH.60 USA
receive CH.60
receive CH.WXO
Table 5-l
23
Adj. volt.
3.5
check for 1.652 0.3Vdc
---
check for 3.4+ 0.3Vdc
the transmitter,