UNIDEN 2020
Sid 2 (26)
3.
R.I.T CIRCUIT ALIGNMENT
3-1
Test Equipment Required
(
1
) None
3-2
Adjustment Procedures
(
1
) Set the main dial at 50, on any BAND or SEGMENT selection.
(
2
) Pull out RF ATT knob and make the marker oscillator work to obtain about
1,000 Hz beat.
(
3
) Set R.I.T knob to 0 at the WIDE (normal) position.
(
4
) Adjust potentiometer R665 in AVR unit to obtain the same beat at ON or
OFF of the R.I.T SWITCH.
(
5
) Again try the same adjustment on R664 in AVR at the NARROW (pull)
position of R.I.T.
4.
S-METER ADJUSTMENT
4-1
Test Equipment Required
(
1
) Standard Signal Generator (SSG)
4-2
Adjustment Procedures
(
1
) Connect SSG output to antenna jack.
(
2
) Set MODE SWITCH to USB.
(
3
) Set BAND SWITCH to 14.0, SEGMENT SWITCH at 200/300, and tune the
main dial to recive 14.200 MHz signal.
(
4
) Turn RF GAIN CONTROL fully clockwise.
(
5
) Turn RF ATT CONTROLL fully clockwise.
(
6
) Tune PRESELECT knob to obtain maximum nois output.
(
7
) Set SSG frequency at other than 14.200 MHz and keep minimum output
level.
(
8
) Turn potentiometer R387 in the IF unit fully counterclockwise. Then, return
it slowly clockwise and stop just befor S-Meter start moving.
(
9
) Feed 40 dB of 14.200 MHz unmodulated output to tranciver, and turn the
dial to obtain maximum S-Meter readings.
(
10
) Adjust potentiometer R389 on the IF unit, so that the S-Meter indicator S-9
readings.
(
11
) Set SSG Output at 80 dB.
(
12
) Adjust potentiometer R392 on the IF unit, so that the indicator shows full-
scale readings.
(
13
) Repeat (
9
) – (
12
) adjustment until both prospected readings ar available.
Summary of Contents for 2020
Page 21: ...UNIDEN 2020 Sid 24 26 PLL Unit PC 086 Operation Unit PC 085...
Page 22: ...UNIDEN 2020 Sid 21 26 1 E 1 F 1 G 1 H 1 H...
Page 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...
Page 25: ...UNIDEN 2020 Sid 25 26...
Page 26: ...UNIDEN 2020 Sid 26 26...