Icom IC-725 Service Manual page 28

RECEIVER ADJUSTMENT
(CONTINUED)
MEASUREMENT
ADJUSTMENT
POINT
ADJUSTMENT ADJUSTMENT CONDITIONS VALUE
UNIT
,LOCATION UNIT ADJUST
NOISE 1 •Displayed frequency: 14.10000 MHz MAIN Connect the Adjust for maximum
MAIN L25, L26
BLANKER •Mode
: USB
oscilloscope to the waveform on the
•[NB] switch :ON cathode of 013. oscilloscope.,
•Apply an RF signal including th\
following pulse noise to the antenna
connector.
RF signal level :3.2 µV
(-97 dBm)
•Receiving
~
-11-
4 msec.
MAIN UNIT
013 Noise blanker C P - - - - - - - - - - - - - ,
~----------R266 BFO CP
Noise blanker adjustment
---C
L26
L25
L33
Sensitivity--1---
adjustment
L21
6-5
L823-
L83 BFO adjustment
C294
R110
=_J--s-meter
R116 adjustment
~---R138 Sensitivity
pre-setting/Total
gain adjustment
L77~
~---L78---1-----Sensitivity
~-----L?g
adjustment