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3.
C.
Sp
belo
. �eas
S
7
5
3
·
·
•
3
= 1-
•
AF
Millivolt-
meter
od la ion check
a
imum
de
iation.:
With
1KHz 12 0mV shall be
odula ion
sensitivity:
Mic
S
Ra io:
Connect he
output
of
the deviation
a
e he
oltmeter
reading . Now
e er reading. The ratio should be greater than 40dB.
ious Radiation
undamental
signal less than
·
re
e
harmonic
wave
output, adjust RF-ATT until noise level just appears.
o
I
be less
than
-6 0dB below the fundamental signal.
R EC E I V E R
e c annel
select
switch at a programmed channel (center frequency of the operating fre
e
cy
ange
is
recommended).
ed o R257 .
e procedure .
e procedures to obtain the same reading on the RF voltmeter on either channel.
ol age should be about 200mV.
pJ
E
Coil
djustment.
connec ing
point
of measuring
nel
selec s
i
2
•
""ec:
a sig
al
gene
a
or
•
speaker and
inimum
ile
set
·
or
outpu
o speaker output maximum. After that, adjust L 1 07 for maximum output .
AF
Oscillator
0
Power
Supply
(8.4V)
4. SKHz
input
voltage 12mV ± 3dB at 1 KHz. Deviation should be 3. 5KHz.
meter to a millivoltmeter. With no audio input to the mic
apply 1 KHz 4 0mV audio into
-6 0dB
.
Adjust L217 and L218 for maximum output on an RF voltmeter
instruments
and the setting of the knob.
ch
at a
programmed
channel.
o the
antenna
connector.
AF millivoltmeter to the
range)
to Pin 16 on IC101
ing
the
input
from the signal generator as low as possible. Then
he
signal
generator ±1
OK Hz.
er 3dB. readjust L 105.
to - 80dBm
to -90dBm and deviation to 3. 5KHz.
7-8
Dummy
Load
Directional
Coupler
Deviation
Meter
±10%.
the
mic connector. Take
EXT SP
term inal.
in
the IF , adjust L101 through L105
Check if rippling (change in output
vary
Set signal
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