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KS-RF40
Adusting the FM modulator
| item
|
Conditions _| Adjustment&Confirmation Methods
| adjust | STD value
Adjusting of
Measuring
modulation
instrument:
balance
Oscilloscope
With no signal applied adjust VR301 so | Minimize the
that the signal waveform amplitude at
peak-to-peak
TP (lead of C401) is minimized.
level
[Minimize the peak-to-park level
(amplitude) of the 38kHz waveform]
Adjustment of
| Measuring
Wile inputting an audio signal of 1 kHz | Degree of
modulation
instrument:
316mVrms, adjust VR303 so that the
modulation:
sensitivity
modulation meter]
degree of modulation at the antenna
40+ 3kHz
outut terminal is 40+ 3kHz
(provided that Fref=88.1MHz with
VR302 positioned at the mechanical
center).
Do not perform this adjustment without
a modulation meter.
Location of dijustment points
Adjusting modulation
balance VR301.
M.sencitivity T.P.
Adjusting modulation
M.balance T-P.
sencitivity VR303.
(J43)
17
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