President Grant

CB-Radio


ALIGNMENT PROCEDURE


RECEIVER ADJUSTMENT


Test equipment required:

       
Power Supply: 13,8 V RF Signal Generator Dummy Load 8 ohm Oscilloscope
AF VTVM      


Preparation alignment:

   
Clarifier Mid.
SQ GAIN Max.
AF GAIN Max.
RF GAIN Max.
MIC GAIN Max.
MOD, S/RF S/RF
NB/ANL Off
RF SSG Modulation: 30% AM 1000Hz
Step Condition Adjustment Procedure
1 Mode: RX AM
Band: Mid.
Channel: 19
L8 Set RF SSG on 27.185MHz, 1kHz 30% AM-mod. Adjust L8 for maximum reading on oscilloscope.
2 Same as STEP 1 L7 L9 L11 L12 L13 L52 L3 L4 L5 Adjust level of RF SSG to obtain 2V on AF VTVM then adjust coils for maximum reading on meter.
3 Same as STEP 1 L8 Adjust to obtain minimum difference between Ch. 40 and Ch. 1
4 Same as STEP 1 VR1 Set the level of RF SSG to 100mV. Adjust VR1 for "5-9" reading on tranceiver meter.
5 Same as STEP 1 VR4 Set SQ on max. Adjust level of RF SSG to 1000mV, adjust VR4 so that the radio signal will apper on tranceiver. Set SQ on minimum.
6 Same as STEP 1
Mode: USB
L14 L15 Set RF SSG on 27.186MHz. Adjust coils to obtain maximum reading on oscilloscope.
7 Same as STEP 1 VR2 Set level of RF SSG to 100uV. Adjust VR2 to obtain "S9" on transmitter meter.
8 Same as STEP 1
SQ: Max.
VR3 Set level of RF SSG to 1000mV. Adjust VR3 so that the audio signal will apper on tranceiver
9 Same as STEP 1
NB/ANL: ON
MID, Ch.18, USB
L1 L2 Set RF SSG on 27.185MHz, 0% Mod., 10uV Level. Connect oscilloscope on D2 and adjust the coils to obtain maximum deviation.
10 Same as STEP 1 L6 Set RF SSG on 27.185MHz with 1 kHz deviation, 1000mV Level. Adjust L6 to obtain maximum.
       


#DréCB { } 1999

- o - Member of the Free Radio Campaign - o -