Kenwood NX-700 Service Manual page 109

Radio Frequency
–118dBm –120.0dBm –109.5dBm
ANT
D213 RF AMP 1st MIX DBM
D207~D210
D216~218 Q210
BPF BPF ATT
Buff AMP Buff AMP Buff AMP
Q9 Q10 Q208
RX VCO BPF
0dBm
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
58.05MHz
–121.5dBm –104dBm
–112.5dBm –118.0dBm
IF AMP IF AMP FM SYSTEM IC
XF202
IC204 Q205 Q204
MCF
W: –85.5dBm
0dBm
N: –83.0dBm
SG input level for 12dB SINAD are obtained Measured by
connecting SG to each point via a 0.01µF capacitor.
W: 244mVrms W: 241mVrms
69.2mVrms N: 122mVrms N: 121mVrms
(ASIC) (MOD SMF)
1 K2 K3 6 1 2
IC510 IC702
450kHz
–72.0dBm –82.0dBm –82.0dBm
IF AMP
CF203
IC202 IC201
E1
CF
CF
CF201
CF202
W: –92.0dBm
N: –93.0dBm
W: 358mVrms W: 222mVrms
N: 174mVrms
(EVOL)
DEV, BAL
(MOD SUM)
1 1
IC709 IC712
MOD TX VCO
VCTCXO
MB
19.2MHz
Audio Frequency
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).
W: 222mVrms
N: 111mVrms N: 111mVrms
(VCO_MOD) (TX VCO)
3 6 7
IC5 Q10
5.5dBm 6.7dBm +18.5dBm
Buff AMP Drive AMP Drive AMP Drive AMP
Q13 Q14 Q101 Q102
PC
DC
AMP
MP
IC101
96mVrms 4.00Vrms
(EVOL)
VOL=20
(SP AMP)
13 14 1 4
IC712 IC715 J701
30W : K
50W : HK
ANT
D103 : HK
Final AMP D104,D105,
IC102 D215
SW ANT Filter
Gate
bias
D107 D108 D109
DET DET DET
DC
AMP
IC103