Level Diagram - Kenwood TK-8100H Service Manual

Receiver Section
Center Frequency
W : –121.0dBm W : –119.0dBm W : –105.5dBm
N : –120.5dBm N : –118.5dBm N : –105.5dBm
Q353
D
G2
ANT
BPF BPF
G1
S
Transmitter Section
Display
Unit
X54-343 W/N
5.0mVrms
W/N W/N W/N
0.10Vrms 1.40Vrms 1.16Vrms
MIC
IC201 IC201 IC202
2 1 6 7 3
To make measurements in the AF section, connect the AC level meter.
AG is set so that MIC input becomes 3kHz/1.5kHz (Wide/Narrow) DEV at 1kHz MOD.
TK-8100H
49.95MHz
W : –85.0dBm
N : –80.5dBm
W : –106.0dBm W : –117.5dBm W : –103.0dBm
N : –105.0dBm N : –117.0dBm N : –101.5dBm
Q352
XF1
Q351
D
G2
G1
S
To make measurements in the RF section, connect the RF level meter.
In the RF section, use a 0.01µF coupling capacitor.
(The display shows the SSG input value required to obtain 12dB SINAD.)
TX-RX Unit
W/N W/N W : 1.05Vrms W : 0.49Vrms
1.26Vrms 1.04Vrms N : 0.44Vrms N : 0.20Vrms
IC202 IC203 IC203 IC161
1 5 7 2 1 9 8 9
TK-8100H

LEVEL DIAGRAM

450kHz
W : –93.0dBm
N : –91.0dBm
CF1
W/N W/N
/CF2
0.34Vrms 0.33Vrms
IC301 IC251 IC251
20 11
12
9 8
To make measurements in the AF section, connect the AC level meter.
(ANT input : –53dBm, 1kHz FM, 3kHz DEV (Wide)/1.5kHz DEV (Narrow))
The AF output level is adjusted for a 0.45V/4Ω by the front panel AF VOL control.
TX-RX Unit (VCO)
–5dBm 0dBm
D409
Q406 Q410 Q411
10
To make measurements in the RF section,
connect the RF Wattmeter (50Ω).
49
Audio Frequency
W/N W/N W/N W/N
0.27Vrms 0.31Vrms 0.33Vrms 10mVrms
IC251 IC251 IC161
Q251
14
3 1 5 7 12
TX-RX Unit
7dBm 14dBm 15dBm 16dBm
Q502 Q503
Q500 Q501
D
D
G G
S S
W/N W/N
0.55Vrms 0.45Vrms
IC252
11 10 1
J1
FINAL Amp TX-RX Unit
45W
Q504
D601
D
ANT
D602
G
S
50