2) VCO and RX Adjustment Specification
ITEM CONDITION UNIT ADJ.SPOTADJUSTING METHOD
Adjustment 439.00MHz MAIN TC101 Adjust so that Tx Frequency
Frequency TX becomes within 439.00MHz?100Hz
VCO 425.00MHz VCO L503 Adjust so that PD voltage becomes
Adjustment RX 1.7V
VCO 511.95MHz VCO Confirm if PD voltage becomes less
Confirmation RX than 9.0 V
Rx Signal 440.05MHz MAIN TC103 It is a tracking generator from an
Sensitivity TC102 antenna connector. -30dBm is
Adjustment L103, L102 inputted.And when CN109 is seen
with a spectrum analyzer, by the
maximum gain, it becomes as it is
shown in the following figure, and
appearance adjustment is carried
out.
430.00M 450.00M
430.05MHz At -7.5dBu SINAD more than 12dB
440.05MHz At -7.5dBu SINAD more than 12dB
450.05MHz At -7.5dBu SINAD more than 12dB
Squelch 440.05MHz MAIN VR101 Adjust so that the squelch stops at
Adjustment SSG OFF perfectly close location
Indication 01
S Meter 440.05MHz MAIN VR102 Adjust so that all the indicator
Adjustment SSG20dBu 1KHz appears
3.5KHz/DEV
3) Tx Adjustment Specification
ITEM CONDITION UNIT ADJ.SPOTADJUSTING METHOD
HI POWER 440.00MHz MAIN VR103 Adjust to 35.0?1.0W
Adjustment HI POWER
MID POWER 440.00MHz MAIN VR104 Adjust to 10.0?1.0W
Adjustment MID POWER
LOW POWER 440.00MHz MAIN Confirm if it becomes
Confirmation LOW POWER 5.0?1.0W
Maximum 440.00MHz MAIN VR107 4.5?0.1KHz/DEV
Deviation MOD
Adjustment 1KHz40mVemf
WIDE
Maximum 440.00MHz MAIN VR105 2.2?0.1KHz/DEV
Deviation MOD
Adjustment 1KHz40mVemf
NARROW
Mic Gain 440.00MHz MAIN VR106 3.0?0.1KHz/DEV
Adjustment MOD
1KHz4mVemf
WIDE
CTCSS 440.00MHz MAIN 800?200Hz/DEV 3KHz LPF ON
Modulation 88.5Hz
Level
Confirmation
DCS 440.00MHz MAIN 800?200Hz/DEV 3KHz LPF ON
Modulation 255 Code
Level
Confirmation
1750Hz 440.00MHz MAIN 3.0?0.5KHz/DEV
Modulation 1750Hz
Level
Confirmation
DTMF 440.00MHz MAIN3.0 ?0.5KHz/DEV
Modulation DTMF1
Level Press the V/M
Confirmation key during TX
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