Kenwood TM-631A Service Manual page 52

TM-631A
ADJUSTMENT
Measurement
Adjustment
Test
Item Condition
Specification/Remarks
equip-
ment Unit Terminal
Unit Part
Method
4, S-meter FREQ:
146.040
MHz
SSG
Rear
TX-RX TX-RX
VR2 Set
to S.1 position.
sP
SSG
-3
dBg panel,
(144) (144)
Front
panel
SSG
25
dBu
All LED light
up.
5.
Receiving
FREQ: 146.040 MHz
Oscillo-
SINAD
12 dB or more
sensitivity
SSG
-9
dBz
scope
Millivolt-
Adjust the
band
edge
in
the same
way.
meter
FREQ: 144.040
MHz
147.940 MHz
Distortion
meter
6. Signal-to- FREQ:
146.040
MHz
S/N ratio of
46
dB or better
noise (S/N)
SSG 60
dBu
ratio with
AF 0.63
V/8
Q
high-level
signal
Common Frequency Adjustments
Measurement
Adjustment
Item
Condition
Test
equip-
Specification/Remarks
ment Unit Terminal Unit Part Method
Transmission FREQ: 222.500
MHz
I.counter
Rear
ANT2
TX-RX
TC1 222.500
MHz
+
100 Hz
frequency
HI/LO
switch: LO
Dummy
panel
(144)
Make transmission.
load
144 MHz Transmitter Adjustments
Measurement
Adjustment
Test
item Condition
Specification/Remarks
equip-
ment Unit Terminal Unit Part
Method
1-1. Transmis- FREQ:
146.000
MHz
Power
Rear ANT1 Final
VR2 POWER MAX.
55
W
or more
sion out- HI/LO
switch:
HI meter panel
(144) (144)
put
(HI
Make transmission.
Ammeter
power)
(Use
DC
power
52W
52
W+1
W, less than
11.0A
supply
having
lammeter)
1-2 Transmis- FREQ:
146.000
MHz
Final
VR4
5W
Check
+0.5
W
sion out- HI/LO
switch
:
LO (144)
put (LO (When
"LOW"
appears
on
the dis-
power)
play, start transmitting.)
FREQ: 144.000
MHz
48 ~
56
W,
less than
11.0A
147.980
MHz
HI/LO
switch
:
HI
Make transmission.
2.
RF meter
1)
FREQ: 146.000 MHz
Power
RF
"7"
digit light up
HI/LO
switch:
LO
meter or
Make transmission.
dummy
load
(50
2) HI/LO
switch:
HI
All LED light
up
Transmit
ohms)
51
TM-631A
ADJUSTMENT
Measurement
Adjustment
Test
Item Condition
Specification/Remarks
equip-
ment Unit Terminal
Unit Part
Method
4, S-meter FREQ:
146.040
MHz
SSG
Rear
TX-RX TX-RX
VR2 Set
to S.1 position.
sP
SSG
-3
dBg panel,
(144) (144)
Front
panel
SSG
25
dBu
All LED light
up.
5.
Receiving
FREQ: 146.040 MHz
Oscillo-
SINAD
12 dB or more
sensitivity
SSG
-9
dBz
scope
Millivolt-
Adjust the
band
edge
in
the same
way.
meter
FREQ: 144.040
MHz
147.940 MHz
Distortion
meter
6. Signal-to- FREQ:
146.040
MHz
S/N ratio of
46
dB or better
noise (S/N)
SSG 60
dBu
ratio with
AF 0.63
V/8
Q
high-level
signal
Common Frequency Adjustments
Measurement
Adjustment
Item
Condition
Test
equip-
Specification/Remarks
ment Unit Terminal Unit Part Method
Transmission FREQ: 222.500
MHz
I.counter
Rear
ANT2
TX-RX
TC1 222.500
MHz
+
100 Hz
frequency
HI/LO
switch: LO
Dummy
panel
(144)
Make transmission.
load
144 MHz Transmitter Adjustments
Measurement
Adjustment
Test
item Condition
Specification/Remarks
equip-
ment Unit Terminal Unit Part
Method
1-1. Transmis- FREQ:
146.000
MHz
Power
Rear ANT1 Final
VR2 POWER MAX.
55
W
or more
sion out- HI/LO
switch:
HI meter panel
(144) (144)
put
(HI
Make transmission.
Ammeter
power)
(Use
DC
power
52W
52
W+1
W, less than
11.0A
supply
having
lammeter)
1-2 Transmis- FREQ:
146.000
MHz
Final
VR4
5W
Check
+0.5
W
sion out- HI/LO
switch
:
LO (144)
put (LO (When
"LOW"
appears
on
the dis-
power)
play, start transmitting.)
FREQ: 144.000
MHz
48 ~
56
W,
less than
11.0A
147.980
MHz
HI/LO
switch
:
HI
Make transmission.
2.
RF meter
1)
FREQ: 146.000 MHz
Power
RF
"7"
digit light up
HI/LO
switch:
LO
meter or
Make transmission.
dummy
load
(50
2) HI/LO
switch:
HI
All LED light
up
Transmit
ohms)
51