Vco And Rx Adjustment Specification; Tx Adjustment Specification - Alinco DR-235 Service Manual

2) VCO and RX Adjustment Specification

ITEM
CONDITION
Adjustment 145.90MHz
Frequency TX
VCO 136.00MHz
Adjustment RX
VCO 173.99MHz
Confirmation RX
Rx Signal 146.05MHz
Sensitivity
Adjustment
136.05MHz
146.05MHz
173.95MHz
Squelch 146.05MHz
Adjustment SSG OFF
Indication 01
S Meter 146.05MHz
Adjustment SSG20dBu 1KHz
3.5KHz/DEV

3) Tx Adjustment Specification

ITEM
CONDITION
HI POWER 146.00MHz
Adjustment HI POWER
MID POWER 146.00MHz
Adjustment MID POWER
LOW POWER 146.00MHz
Confirmation LOW POWER
Maximum 146.00MHz
Deviation MOD
Adjustment 1KHz40mVemf
WIDE
Maximum 146.00MHz
Deviation MOD
Adjustment 1KHz40mVemf
NARROW
Mic Gain 146.00MHz
Adjustment MOD
1KHz4mVemf
WIDE
CTCSS 146.00MHz
Modulation 88.5Hz
Level
Confirmation
DCS 146.00MHz
Modulation 255 Code
Level
Adjustment
1750Hz 146.00MHz
Modulation 1750Hz
Level
Confirmation
DTMF 146.00MHz
Modulation
DTMF
Level
Press the V/M
Confirmation
key during TX
UNIT ADJ.SPOT
MAIN TC101
MAIN L123
MAIN
MAIN L105, L104
L103, L102
MAIN VR101
MAIN VR102
UNIT ADJ.SPOT
MAIN VR103
MAIN VR104
MAIN
MAIN VR107
MAIN VR105
MAIN VR106
MAIN
MAIN VR108
MAIN
MAIN
1
ADJUSTING METHOD
Adjust so that Tx Frequency
becomes within 145.90MHz±100Hz
Adjust so that PD voltage becomes
1.5V
Confirm if PD voltage becomes less
than 7.3 V
Repeatedly adjust so that the Rx
sensitivity becomes in maximum.
Confirm:
At -7dBu SINAD more than 12dB
At -8dBu SINAD more than 12dB
At -6dBu SINAD more than 12dB
Adjust so that the squelch stops at
perfectly close location
Adjust so that all the indicator
appears
ADJUSTING METHOD
Adjust to 50.0±1.0W
Adjust to 10.0±1.0W
Confirm if it becomes 4.0 ±1.0W
4.5±0.1KHz/DEV
2.2±0.1KHz/DEV
3.0±0.1KHz/DEV
800±200Hz/DEV 3KHz LPF ON
800±50Hz/DEV 3KHz LPF ON
3.0±0.5KHz/DEV
3.0 ±0.5KHz/DEV
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