Kenwood NX-3720HG Service Manual page 180

NX-3820/3820H
Receiver Section
RF (Center Frequency)
5
-120dBm -121dBm -121.5dBm
ANT D205
D206
C262 D207 C337
ANT
LPF
SW
4
To make measurements in the AF section, connect the AC level meter.
(ANT input: –53dBm, 1kHz FM, 3kHz DEV (Wide). SP output: 4W@4ohm Load)
In the RF section, use 470pF coupling capacitor.
(The display shows the SSG input value required to obtain 12dB SINAD.)
3
Transmitter Section
AF (1kHz)
5.8mVrms
2
IC607
MIC
CODEC
1
A B
-107.5dBm
C311
C306 IC302
HPF Transceiver IC
C145
-5dBm~+5dBm
VCO
AF (1kHz)
149.4mVrms
-5~5dBm
(Mod) (Local)
IC404 C327 C145
MPU/ IC303
DSP
Transceiver IC
C
(No.RA054<Rev.001>) 2-12
141mVrms 72.1mVrms 77.4mVrms
IC607
IC404 C655 IC412 C661 IC608 C627 IC601
MPU/DSP
VOL
CODEC
RF (Center Frequency)
2dBm 14.2dBm K,K2:18.2dBm
E:14.5dBm
C216 IC202 C225 Q201 C238 IC201
Pre-
Drive
Drive
* Transmit frequency : 435MHz (K2,E), 485MHz (K)
D E
2-12 (No.RA054<Rev.001>)
AF (1kHz)
K,K2:45W
K,K2:47.7dBm K,K2:47.5dBm
E:45dBm E:25W
E:45.2dBm
D205 ANT
D206
C250 D207 C262
ANT
Final LPF
SW
F G