UNIDEN 2020
Sid 14 (26)
2.
PLL UNIT (PC-086, PC-087) ALIGNMENT.
2-1.
Test Equipment Required
(
1
) Frequency Counter
(
2
) RF voltage Meter (RF VTVM)
2-2.
VCO Unlocked-oscillation Frequency Adjustment.
(
1
) Set FUNCTION SWITCH to R. EXT.
(
2
) Connect Frequency Counter to the DRAIN of Q807.
(
3
) Adjust L801 so as to get 16.000 MHz counter readings.
CAUTION
Don’t use magnetized tools when adjusting PLL unit because
magnetization of VCO coil core may make C/N of oscillation
output worse extremely.
2-3.
Bandpass Amplifier Alginment.
(
1
) Set FUNCTION SWITCH to INT.
(
2
) Set SEGMENT SWITCH to 200/700 kHz.
(
3
) Turn and set the dial to 50 (center) readings.
(
4
) Connect RF voltage meter to the BASE of Q817.
(
5
) Adjust L804 – L807 to get maximum meter readings. It will indicate
about 0.5V r.m.s.
Содержание 2020
Страница 20: ...UNIDEN 2020 Sid 20 26 0 1 uS DIV 0 1 uS DIV 5 uS DIV 5 uS DIV 0 5 uS DIV 0 5 uS DIV 1 A 1 B 1 A 1 C 1 D 1 D 1 C...
Страница 21: ...UNIDEN 2020 Sid 24 26 PLL Unit PC 086 Operation Unit PC 085...
Страница 22: ...UNIDEN 2020 Sid 21 26 1 E 1 F 1 G 1 H 1 H...
Страница 23: ...UNIDEN 2020 Sid 22 26 5 uS DIV 0 1 uS DIV 0 1 mS DIV 5 uS DIV 0 1 mS DIV 1 I 1 I 1 J 1 J 1 K...
Страница 24: ...UNIDEN 2020 Sid 23 26 2 C 2 B 2 D 2 A 2 D 20 Us DIV 0 1 Us DIV 1 Us DIV 0 1 Us DIV 20 Us DIV 20 Us DIV...
Страница 25: ...UNIDEN 2020 Sid 25 26...
Страница 26: ...UNIDEN 2020 Sid 26 26...