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(2)
ALIGNMENT FOR AM 2ND LOCAL OSCILLATOR
a.
Required Instrument
RF Signal Generator (RFSG)
Frequency Counter
DVM
b.
Alignment Procedure
Setting
RECEIVING
15.1 MHz
FREQUENCY
BAND
SW
AM MODE
LSB
TONE
NORM
WIDE / NARR.
WIDE
MONO
RF GAIN
MAX.
ADJUSTMENT
T7
c.
Instrument Connection
Frequency Counter
0.000 KHz
(1)
Set RFSG output level to 80 emf/dBµ and frequency to 55.845MHz
with modulation 1KHz 30%.
(2)
Turn the radio to ON and set AM mode to "AM".
(3)
Turn the radio receiving frequency to 15.1MHz.
(4)
Connect RFSG output to ANT IN (TP2).
(5)
Adjust T7 to get 1KHz maximum level output of the speaker.
(6)
Change RFSG output frequency to 55.843MHz.
(7)
Change AM mode to "LSB" mode.
(8)
Check TP3 to have a reading on DVM 1.5V
(9)
Set key lock function to ON.
(10) Adjust T7 to get the speaker output tone beat below 50Hz.
SSVM
TP4
TP8
Procedure
T7
RFSG
30%
55.845 MHz
1 0
0.05.
80
dBµ
TP2
RF OUT
TP5
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