UNIDEN 2020
Sid 13 (26)
LOCAL OSCILLATOR CIRCUITS ALIGNMENT
1.
VFO UNIT (PC-083, PC-084) ALIGNMENT
1-1.
Test Equipment Required
(
1
) Frequency Counter
(
2
) RF voltage Meter (RF VTVM)
1-2.
Oscillator Frequency Adjustment.
(
1
) Set FUNCTION SWITCH to INT
(
2
) Set R.I.T SWITCH to OFF
(
3
) Connect Frequency Counter to Pin 5 J701.
(
4
) Turn the main dail nd set it to 00 KHz (toward 90 kHz, 100 kHz), then adjust
L702 to get 9,038 kHz counter reading.
(
5
) Then turn the dial to 00 kHz (toward 10 kHz), and adjust trimmer C707 to
get 9,138 kHz counter readings.
(
6
) Repeat (4) and (5) adjustments until both readings are made correctly.
1-3.
Output Voltage Adjustment.
(
1
) Set switches to same as 1-2 adjustment.
(
2
) Connect RF meter to Pin 5 of J701.
(
3
) Turn and set the dial to 50 (center) readings.
(
4
) Adjust L706 and L707 to get maximum meter readings. It will indicate
around 0.4 – 0.5V r.m.s.
Содержание 2020
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