President Herbert CB-Radio


ALIGNMENT PROCEDURE


CARRIER OSCILLATOR PORTION


Test equipment required:
Power Supply: 13,8 VOscilloscopeDummy Load 50 ohmFrequency Counter

Preparation alignment:
Channel:40
StepConditionAdjustmentProcedure
1RX Band C
Channel 20
L701Connect DC-Voltmeter to TP1. Adjust for 2,4Volt +/-0,1Volt
2TX Band C
Channel 20
L702Connect DC-Voltmeter to TP1. Adjust for 2,4Volt +/-0,1Volt
3RX Band C
Channel 20
CT701Connect Frequency Counter to TP 3. Adjust for 37.900MHz


RECEIVER PORTION


Test equipment required:
Power Supply: 13,8 VRF Signal GeneratorAF Signal GeneratorOscilloscope
Dummy Load 8 ohm

Preparation alignment:
Channel:19
StepConditionAdjustmentProcedure
1RX AM Band C
Channel 20
L1, L4, L5, L6, L7Connect RRF SSG with 6%mod., -107dBm to ant. jack. Adjust for maximum signal utput at speaker.
2RX FM Band C
Channel 20
L9Connetc RF SSG with -47dBm, no mod. to ant. jack. Connect DC-Voltmeter to TP2. Adjust for 3,5Volt +/- 0,1Volt.
3RX FM Band C
Channel 20
RT2Connetc RF SSG with -73dBm, no mod. to ant. jack. Adjust for LED "7" on RF S-Meter.
4RX AM Band C
Channel 20
RT1Connetc RF SSG with -47dBm, 60% 1kHz mod. to ant. jack. Adjust SQ.


TRANSMITTER PORTION


Test equipment required:
Power Supply: 13,8 VRF Power MeterDeviation MeterOscilloscope
Audio OscillatorDummy Load 50 ohm

Preparation alignment:
Channel:19
StepConditionAdjustmentProcedure
1TX FM Band C
Channel 20
L16Adjust for maximum RF Output
2TX FM Band C
Channel 20
RT5Adjust for 4 Watt RF Output
3TX AM Band C
Channel 20
RT4Adjust for 4 Watt RF Output
4TX FM Band C
Channel 20
RT3Adjust for LED "7" on RF Output Meter
5TX FM Band C
Channel 20
RT6Connect 100ohm Dummy Load to Ant. jack. Adjust for LED "4" on SWR-Meter
6TX AM Band C
Channel 20
RT8Adjust for 90% Modulation
4TX FM Band C
Channel 20
RT7Adjust for +/- 2kHz FM-Deviation


This counter shows the number of hits since the 7th November 1999


Go Back To The Alignments Page

Go Back To The Main Home Page

Copyright © RadioMods 1997-2016

http://www.radiomods.co.nz/