Kenwood NX-800 Service Manual page 161

Receiver Section / 接收部分
Radio Frequency / 射频频率
–118dBm –120.5dBm –114.5dBm
ANT
RF AMP 1st MIX DBM
D212,D213 Q210 D207~D210
BPF BPF
Buff AMP Buff AMP Buff AMP
Q9 Q10 Q208
RX VCO LPF
0dBm
Transmitter Section / 发射部分
5.2mVrms
4.0mVrms 48.2mVrms
MIC
(MIC SUM1) (MIC SUM2)
6 7 6
IC709 IC706
MIC input : 3kHz DEV. (Wide), 1.5kHz DEV. (Narrow) at 1kHz MOD.
Transmitting frequency : Center frequency
麦克风输入：3kHz DEV. (宽)，1.5kHz DEV. (窄) (1kHz MOD时)
发射频率：中心频率
W : Wide / 宽
N : Narrow / 窄
58.05MHz
–121.5dBm –104dBm
–112.5dBm –118.0dBm
IF AMP IF AMP FM SYSTEM IC
IC204 XF202 Q205 Q204
MCF
W: –85.5dBm
0dBm
N: –83.0dBm
SSG input level for 12dB SINAD are obtained Measured by
connecting SSG to each point via a 0.01µF capacitor.
获得12dB SINAD的SSG输入电平。
将SSG连接到通过0.01μF电容器的每个点后测得。
W: 244mVrms W: 244mVrms
N: 122mVrms N: 122mVrms
69.2mVrms
(ASIC) (MOD SMF)
1 K2 K3 6 1 2
IC510 IC702
450kHz
–72.0dBm –82.0dBm –82.0dBm
IF AMP
IC202 CF203 IC201
E1
CF
CF
CF201
CF202
W: –92.0dBm
N: –93.0dBm
W: 354mVrms
N: 177mVrms
(EVOL)
DEV, BAL
(MOD SUM)
1 1
IC709 IC712
MOD TX VCO
VCTCXO
MB
19.2MHz
Audio Frequency / 音频频率
186mVrms 226mVrms 226mVrms
(ASIC) (RXAF SMF) (RX SUM)
K1 3 4 6 7
IC510 IC701 IC711
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) (TX VCO)
3 6 7
IC5 Q6
–2.5dBm 6.5dBm +17.5dBm
Buff AMP Drive AMP Drive AMP Drive AMP
Q9 Q10 Q101 Q102
PC DC
AMP
MP
IC101
96mVrms 4.00Vrms
(EVOL)
VOL=20
(SP AMP)
13 14 1 4
IC712 IC715 J701
25W
ANT
Final AMP D103,D104
IC102 D106,D216
SW ANT Filter
Gate
bias
D108 D109 D110
DET DET DET
DC
AMP
IC103