Icom IC-H12 Maintenance Manual page 24

C. 2
Con
•
Connec
: e a
a
c.
:e
•
•
Frequency Check
d
ec a 10. 24 Hz ampl ifier
loose couple. It should be:
1 a
ecei er Spurious Response
a spea er and millivoltmeter
a erminal. All receiver
ecei e udio Output
oscilloscope, an
a illivoltmeter ,
inal connect a signal generator
z. Turn the AF VO L control clockwise . Read the millivoltmeter when the distortion is 10%
to a frequency counter, check the frequency of X 101 (2nd OSC)
10.240MHz ±400Hz.
to the EXT SP terminal. Connect a 50 ohm dummy load to
spurious should be supressed less tha 3dB, over entire frequency
�
a distortion meter to the EXT SP terminal. To the ANT
and set the signal generator to -80 to - 90dBm and deviation to
7- 9
.