Furuno FS-1503 Service Manual page 82

Board Item
Ref. OSC,
Frequency
3rd Local
OSC.
1st Local
OSC.
S-meter
S/N Ratio
Total Gain
NB
Function
LINE OUT
TX/RX
Level
(05P0666)
MIC GAIN
TX GAIN
Adjustment
Output
Level
H3E MOD
Adjustment
LINE IN
Level
Table 5-2 Adjustment (2/2)
Setting Adjuster
30 minutes after
power-on
MODE: J3E
MODE: TLX
RX SIG: 4 MHz/J3E
RX SIG: 4 MHz/J3E
RF GAIN
MAX/AGC ON
RX SIG: 4 MHz/J3E
FR/AF GAIN
MAX/AGC ON
External pulse noise
mixed
RX SIG: 4 MHz/TLX
RF GAIN MAX/
AGC ON
MIC IN: 600 Ω/
-40 dBm/1500 Hz
MIC IN: 600 Ω/
-40 dBm/1500 Hz
MIC IN: 600 Ω /
-54 dBm/1500 Hz
4 MHz/J3E/P.Data:
220
2-TONE ALM:
[ALM] + [ENT]
4 MHz/J3E/P.Data:
220
MIC IN: -40 dBm/
600 Ω /1500 Hz
2182 kHz/
H3E/P.Data: 200
LINE IN: 0 dBm/
1700 Hz
4 MHz/ TLX/
P.Data: 220
5-13
Check Point
OSC Circuit
TP3 (H) -
C554
TP4 (C)
TP7 (H) -
-
TP6 (C)
TP1 (H) -
-
TP2 (C)
RX circuit
R210 S meter
- -
- -
CR11/12 (A) -
GND
REMOTE
Connector
10 (H) -11 (C)
TX Circuit
TP8 (H) -
-
TP9 (C)
TP5 (H)-
R156
TP6 (C)
Output from
R156
main unit
J2
-
(EXC OUT)
Output from
R101
main unit
J2
-
(EXC OUT)
Level Remarks
54 MHz ±
1 Hz 2Lo output
1.1 Vp-p to (54 MHz)
1.5 Vp-p
more than
456.5 kHz
1.0 Vp-p
0.8 Vp-p to Fo +
1.2 Vp-p 54.455 kHz
SSG Level
+10 dBµV
SSG Level
+2 dBµV ??
(S/N = 20 dB)
SSG Level
+1 to
(AF output of
-5 dBµV
1 W)
Negative
pulse
600 Ω Load
+3 to +9 dBm
1.6 ±
0.2 Vp-p
0.4 Vp-p
40 W
about 20 Vp-p OUT 50 Ω
Load
100 % MOD
OUT 50 Ω
about 20 Vp-p
Load