Realistic STA-95 - Alignment Procedures; AM IF & RF Alignment

ALIGNMENT
PROCEDURES
Do not
attempt
alignment unless the following equipment is
available.
1. AM Signal Generator
2. Oscilloscope
3. AC Voltmeter
4. FM Signal Generator
5. Stereo Modulator
6. Audio Generator
7. Distortion
meter
8.
DC Voltmeter
9.
Frequency
Counter
Note: Bemove
line cord
antenna
from FM external
antenna terminal when aligning.
AM IF
&
RF ALIGNMENT
Note: Remove line cord
antenna from FM external
antenna
terminal
when aligning
RECEIVER
L451
TAPE OUT
Output of signal
generator
should be no higher than necessary to
obtain an output
reading.
Signal Generator Modulation: 30%.
Set SELECTOR switch SW1 to AM.
STEP
SIGNAL
GENE BATOR
COUPLING
SIGNAL
GENERATOR
F R EOUENCY
RECEIVER
DIAL
SETTI NG
INDICATOR
ADJUSTMENT
Refer Fig. 4.
REMARKS
1 Refer Fig. 1
455
kHz
(400
Mz Mod.)
Point
of
non-
i nterference
(on/about
600 kHz)
AC Voltmeter
to TAPE
OUT
jack
T401
flFT)
Adjust for
maxi-
mum reading.
2
Same as Step
1
600 kHz
(400
Hz Mod.)
600 kHz
Same as Step 1
L401
L451
(OSC
Coil)
(ANT
Coil)
Same as
Step
1
3
Same as Step
1
1400
kHz
(400
Hz Mod.)
1400 kHz Same as Step 1
TC1
05
(OSC
Trimmer)
TC1 04
(ANT
Trimmer)
Same
as Step 1
4
Same as Step 1
1000 kHz
(400
Hz Mod.)
1000
kHz Same as Step 1
VR402
Adjust
for
250
mV Audio
output.
5
Same as Step 1
i000
kHz
(400
Hz Mod.)
1000 kHz
Receive
r's
SIGNAL
Meter
VR4O1
Adjust for
70o/o
reading of full
scale with
input
of 5
mV/m.
Fig. 1
AM ALIGNMENT
CONNECTION
I
I