Kenwood NX-800 Service Manual page 149

–82.0dBm –82.0dBm
IF AMP
3
IC201
E1
W: 354mVrms
N: 177mVrms
(EVOL)
DEV, BAL
1
IC712
TX VCO
MOD
VCTCXO
MB
19.2MHz
LEVEL DIAGRAM /
186mVrms 226mVrms
(ASIC) (RXAF SMF)
K1 3 4
IC510 IC701
AF VTVM
AF level obtained when the AF output level is adjusted for 4.00V/4Ω
with the front panel AF VOL control. Measured with AF voltmeter
connected to the external speaker jack, receiving a –53dBm SSG signal
modulated at 1kHz, DEV (Wide 3kHz, Narrow 1.5kHz).
用前面板AF VOL控制器将AF输出电平调整为4.00V/4Ω时获得的AF电平。
将AF电压表连接到外部扬声器插孔，正在接收调制为1kHz,DEV(宽3kHz，窄1.5kHz)
的-53dBm SSG信号时测得。
W: 198mVrms W: 198mVrms
N: 99mVrms N: 99mVrms
(VCO_MOD)
3 6 7
IC5
–2.5dBm
Buff AMP Drive AMP Drive AMP
Q9 Q10
电平图
Audio Frequency / 音频频率
226mVrms
(EVOL)
VOL=20
(RX SUM)
6 7 13
IC711 IC712
(TX VCO)
Q6
6.5dBm +17.5dBm
Drive AMP Final AMP
Q101 Q102 IC102
Gate
bias
PC
DC DC
AMP AMP
MP
IC101 IC103
NX-800
96mVrms
(SP AMP)
14 1 4
IC715 J701
D103,D104
D106,D216
SW ANT Filter
D108 D109 D110
DET DET DET
4.00Vrms
25W
ANT
149