Level Diagram - Kenwood NX-900 Service Manual

NX-900
Receiver Section
–120.5dBm
–119.0dBm
ANT
LPF
AMP AMP
Q9 Q10
RX VCO
Transmitter Section
5.3mVrms
4.2mVrms
MIC
(MIC SUM1)
6
MIC input : 3kHz DEV. (Wide 5k), 2.4kHz DEV. (Wide 4k), 1.5kHz DEV. (Narrow) at 1kHz MOD.
Transmitting frequency : Center frequency
100

LEVEL DIAGRAM

Radio Frequency
–107.5dBm
–122.5dBm
RF AMP
L906 L907
Q2
BPF BPF
AMP
Q420
Wilkinson
/
BPF
Coupler
8.0dBm
44.0mVrms
(MIC SUM2)
7 6
IC709 IC706
58.05MHz
–122.0dBm
–117.5dBm –120.5dBm
1st Mixer IF AMP
XF202
IC716 Q205
MCF
0dBm
AMP
Q208
LPF/
ATT
0dBm
SG input level for 12dB SINAD are obtained Measured by
connecting SG to each point via a 0.01μF capacitor.
W5k: 190mVrms
W4k: 152mVrms
N: 95mVrms
65.6mVrms
(ASIC)
1 K2 K3
IC510
–106.0dBm
IF AMP FM SYSTEM IC
Q204 IC202
CF
CF201
CF202
W5k: –97.0dBm W5k: –102.5dBm
W4k: –97.0dBm W4k: –102.5dBm
N: –97.0dBm N: –103.5dBm
W5k: 190mVrms
W4k: 152mVrms
N: 95mVrms
(MOD SMF) (MOD SMF)
6 1 2
IC702 IC709
MOD TX VCO
VCTCXO
X1
19.2MHz
450kHz
–8
–74.0dBm –82.0dBm
IF AM
CF203
IC20
CF
1
AMP
Q9