Alinco DR-620, Service Manual

Page: 45 / 56

3) VHF Adjustment Specification
ITEM CH No CONDITION UNIT ADJ.SPOT ADJUSTING METHOD
P D ADJ. CH1
1 4 6 .0 0 M H z
R X
M A IN L25
Adjust so that P D V vo ltag e beco m es
2 .7 V
Freq u en cy C H 2
4 4 0 .0 0 M H z
T X
M A IN V R 6
Adjust so that T x Freq u en cy
b eco m es within 1 4 6 .0 0 M H z ± 1 0 0 H z
HI
P O W E R
C H 3
1 4 6 .0 0 M H z
H IG H
F R O N T R E 601
Adjust to 5 0 .0 ± 1 .0 W
M ID
P O W E R
C H 4
1 4 6 .0 0 M H z
M ID
F R O N T R E 601
Adjust to 1 0 . 0 ± 1 .0 W
L O W
P O W E R
C H 5
1 4 6 .0 0 M H z
L O W
F R O N T R E 601
Adjust to 5 .0 ± 0 .5 W
R X
Distortion
C H 6
1 4 6 .0 5 M H z
S S G 60dB u
M A IN L101
It is adjusted to b eco m e m axim um .
Confirm : Less than 3 %
Rx Signal
Sensitivity
C H 7 1 3 6 .0 5 M H z F R O N T
F U N C - 1
R E 6 0 1 -1
F U N C
Adjust so that th e Rx sensitivity
beco m es in m axim um .
At - 8 d B u S IN A D m ore than 12dB
Rx Signal
Sensitivity
C H 8 1 4 6 .0 5 M H z F R O N T
F U N C - 1
R E 6 0 1 -1
F U N C
Adjust so that th e Rx sensitivity
b eco m es in m axim um .
At - 8 d B u S IN A D m ore than 12dB
Rx Signal
Sensitivity
C H 9 1 7 3 .9 5 M H z F R O N T
F U N C - 1
R E 6 0 1 -1
F U N C
Adjust so that th e Rx sensitivity
b eco m es in m axim um .
At - 4 d B u S IN A D m ore than 12dB
S -m e te r(1 ) C H 1 0
1 4 6 .0 5 M H z
S S G - 3 d B u
F R O N T F U N C It is confirm ed by th e F U N C key.
S -m e te r
(F U L L )
C H 11
1 4 6 .0 5 M H z
S S G 15dBu
F R O N T F U N C It is confirm ed by th e F U N C key.
Squelch C H 1 2
1 4 6 .0 5 M H z
S S G O F F
Ind : 01
M A IN V R 8
Adjust so that th e squelch stops at
perfectly close location
R X
Distortion
C H 1 3
8 7 .5 M H z
6 0 d B u /1 k H z
2 2 K H z /D E V
M A IN L53
It is adjusted to b eco m e m axim um .
Confirm : Less than 3 %
S G O U T 2 0 ~ 80dB u : Less than 5 %
S -m e te r(1 ) C H 1 4
8 7 .7 M H z
-3 d B u /1 K H z
2 2 K H z /D E V
F R O N T F U N C It is confirm ed by th e F U N C key.
S -m e te r
(F U L L )
C H 1 5
8 7 .7 M H z
1 5 d B u /1 K H z
2 2 K H z /D E V
F R O N T F U N C It is confirm ed by th e F U N C key.
M axim um
Deviation
C H 1 6
1 4 6 .0 0 M H z
M O D
1 K H z 4 0 m V e m f
M A IN V R 3
4 .5 ± 0 .1 K H z /D E V
M axim um
Deviation
C H 1 7
1 4 6 .0 0 M H z
M O D 1K H z
4 0 m V e m f
(narrow )
2 .2 ± 0 .3 K H z /D E V
Mic G ain C H 1 8
1 4 6 .0 0 M H z
M O D
1 K H z 4 m V e m f
M A IN V R 5
2 .8 5 ± 0 .1 K H z /D E V
C T C S S
Modulation
C H 1 9
1 4 6 .0 0 M H z
8 8 .5 H z
8 0 0 ± 4 0 0 H z /D E V 3 K H z LP F O N
D C S
Modulation
C H 2 0
1 4 6 .0 0 M H z
2 5 5 C o d e
M A IN V R 7
8 0 0 ± 5 0 H z /D E V 3 K H z L P F O N
1 7 5 0 H z
Modulation
C H 21
1 4 6 .0 0 M H z
1 7 5 0 H z
3 .0 ± 0 .5 K H z /D E V
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