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Alan 9001 CB-Radio


ALIGNMENT PROCEDURE


PLL and CARRIER OSCILLATOR PORTION


Test equipment required:
Power Supply: 13,8 VOscilloscopeFrequency CounterDC Voltmeter

Preparation alignment:
PA SWOff
RITMiddle position
ModeAM
Frequency28.000 MHz

StepConditionAdjustmentProcedure
1AM
RX
Connect the Oscilloscope and Frequency Counter to TP. Adjust for 6.200 MHz +/- 20 Hz
2AM
RX
Connect the Oscilloscope and Frequency Counter to TP. Adjust for 38.6950 MHz +/- 20 Hz.
Check:
USB : 38.6975MHz
LSB : 38.6925MHz
3AM
RX
Connect the DC Voltmeter to TP. Adjust for 6.5 V +/- 0.1 V
4CW
RX
Connect the Oscilloscope and Frequency Counter to TP. Adjust for 10.695 MHz +/- 20 Hz
5LSB
RX
Connect the Oscilloscope and Frequency Counter to TP. Adjust for 10.6925 MHz -40 Hz to + 0 Hz
6USB
RX
Connect the Oscilloscope and Frequency Counter to TP. Adjust for 10.6975 +/- 20 Hz
7USB
RX
Connect the Oscilloscope and Frequency Counter to TP. Adjust for 38.6975 +/- 20 Hz

To get 26.500MHz to 27.999MHz plus the 'FCC' Bands in nine bands, remove resistor E and C.

BandFrequency Range (Without Modification)
A28.000 to 28.4999 MHz
B28.500 to 28.999 MHz
C29.000 to 29.4999 MHz
D29.5000 to 29.699 MHz

Output Frequency from PLL-PCB to Analog-PCB

Fvco = F + 10.6950MHz + a
F = Transmitting and Receiving frequency
Fvco = VCO Output frequency
a = 0kHz for CW/FM/AM
a = +2.5kHz for USB
a = -2.5kHz for LSB

ALIGNMENT PROCEDURE


TRANSMITTER PORTION


Test equipment required:
Power Supply: 13,8 VAF SSGRF VTVMDC AM-meter
AF VTVMFM Linear DetectorOscilloscopeRF Power Meter
Dummy Load, 50 ohm

Preparation alignment:
Clockwise
Counter Clockwise
Clockwise
SWR/CALClockwise
RF GainMiddle position
PA SWOff
INDIC SWRF
Mic Gain SwOff
RF PowerMax.
Frequency28.000 MHz

StepConditionAdjustmentProcedure
1USB
No Mod.
Remove the PCB between TP101, TP102 and TP103 from Main PCB. Connect a DC AM Meter to TP (+) and TP (-). Adjust DRIVER for 50 mA reading on the DC AM Meter.
2USB
No Mod.
Remove the PCB between TP101, TP102 and TP103 from Main PCB. Connect the DC AM Meter to TP (+) and TP (-). Adjust FINALE for 50 mA reading on the DC AM Meter
3USB
1 mV Mod.
Connect a RF Power Meter to Ant.jack. Connect a RF VTVM, an Oscilloscope and an RF Linear Dectector across an Dummy Load to the RF Power meter. Adjust for maximum reading en the RF VTVM. During this step, set the AF Oscillator so that the output is less than 20 V. Repeat this step two times.
4USB
30 mV Mod.
Adjust XXX for 32.5 V reading on the RF VTVM.
5USB
30 mV Mod.
Adjust MOD Bal so that the carrier leakage at USB and LSB become minimum and almost equal.
6CW
No Mod.
Connect a SW between Pin 8 and 9 of ACC connector. When turn on the SW, adjust for 21 Watt reading on the RF Power Meter.
7AM
No Mod.
Adjust CW PWR for 10 Watt reading on the RF Power Meter
8AM
No Mod.
S-METERAdjust S-METER so that "9" LCD just light on.
9AM
1 kHz 30 mV Mod.
AM MODAdjust AM MOD to obtain the 85% negative reading on the Oscilloscope.
10AM
1 kHz 1 mV Mod.
RF METERINDIC: MOD. Adjust RF METER so that "9" LCD just light on.
11FM
1 kHz 30 mV Mod.
FM DEVAdjust for +/- 3 kHz deviation on the FM Linear Detector.
12CW
No Mod.
Vol.: Max.
CW PWRConnect an AF VTVM across a Dummy Load (8 ohm) between Pin 1 and Pin 2 of ACC connector. When turn on the SW, adjust CW PWR for 0.4 V reading on the AF VTVM.


ALIGNMENT PROCEDURE


RECEIVER PORTION


Test equipment required:
Power Supply: 13,8 VDummy Load 8 ohmAF VTVMOscilloscope
HF SSG:28.000 MHz1 kHz30% Mod.

Preparation alignment:
NB SWOff
PA SWOff
Beep SWOff
VOLUMEMax.
RITMiddle position
ModeAM
SquelchMin.
DX/LOCDX
Frequency28.000 MHz

StepConditionAdjustmentProcedure
1AM
SSG 40dB
1 kHz Mod.
Alignment of sensitivity. Adjust coils for maximum reading on the AF VTVM.
2AM
SSG 66dB
1 kHz Mod.
Alignment of Squelch. Set Squelsch to maximum. Adjust VR102 so that the squelch just breaks.
3AM
SSG 46dB
No Mod.
Alignment of S-meter. Adjust so that "9" LCD just lights on.
4FM
SSG 1 mV
1.5 kHz Dev.
Adjust for maximum reading on the AF VTVM.
5AM
SSG 1 mV
Noise Gen.
Adjust for maximum reading on the AF VTVM. Noise Generator output: 50 Hz SQ wave 2 V P-P.


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Microphone Connection

PinDescription
1Microphone
2Ground
3TX Key (Connect to Ground)
4Program Up (Connect to Ground)
5Program Down (Connect to Ground)