AR-3300 & AR-3500 Alignment Procedures
SYNTHESIZER
1. - Set radio to 29.9000 Mhz. FM mode.
2. -
Connect DVM to TP-1 and adjust T-13 for 3.8 VDC.
3. -
Set the radio to 28.0000 Mhz
.
( Clarifier Center )
4. -
Connect Scope to
TP-2.
Adjust
T-12
for Max in AM mode.
5. -
Connect Scope to cathode of
D-77.
Adjust
T-11
for Max in AM mode.
NOTE : Step 2 of SSB Transmitter Alignment should be done at this time as it effects
10.695 Mhz. Oscillator adjustment.
Please note that radios with the optional 2.6 Khz. SSB filter use different offset
frequency adjustments. The filter can be identified by the markings on the top.
( 10M2.6D
is the 2.6 filter ).
6. -
Connect frequency counter to
TP-3
( High impedence probe ).
4.2 Khz
.
2.6 Khz
.
A. -
Adjust
T-16
for
10.6925
-- or -
10.6935
in
USB
mode.
B. -
Adjust
T-17
for
10.6975
-- or -
10.6965
in
LSB
mode.
C. -
Adjust
T-15
for
10.6943
-- or -
10.6943
in
CW
mode.
D. -
Adjust
T-14
for
10.6950
-- or -
10.6950
in
AM TX
mode.
7. -
Connect frequency counter to
TP-2
.
4.2 Khz
.
2.6 Khz
.
A. -
Adjust
VR-3
for
17.3050
-- or --
17.3050
in
FM
mode.
B. -
Adjust
VR-1
for
17.3075
-- or --
17.3065
in
USB
mode.
C. -
Adjust
VR-2
for
17.3025
-- or --
17.3035
in
LSB
mode.
8. -
Adjust
T-14
for output freq. of
28.0000 Mhz.
FM mode.
RECEIVER
IF ( 10.695 Mhz.)
1. -
Set radio in
AM
mode. Apply a
10.6950 Mhz. ( AM modulated at 60% )
signal from
signal generator through a 10 to 1 probe to the
emitter of Q-2.
( Output of Signal
Generator should be just enough to produce output at speaker, about
12 db. Sinad.)
2. -
Adjust
T-4, T-5, T-8, T-9, and T-10
for Max AF output.
NOTE : Any excessive Signal Generator output will activate AGC and cause a false
alignment.
3. -
Set radio to CW mode, Signal generator to 0% modulation. Adjust T-6 & T-7 for max
audio output.
NOISE BLANKER
1. -
Connect a noise generator ( Sencore NL 204 or equivalent ) in series with signal
generator output. Connect Scope to
TP-4.
Set signal generator for
20 uV.
output. Adjust
T-400 & T-401
for Max peaks.
HIGH FREQUENCY
1. -
Set radio to
28.0000 Mhz. on AM mode.
2. -
Apply a 28.0000 Mhz.
( AM modulated at 60% )
signal to antenna.
