Realistic STA-85 - Page 7

ALIGNMENT
PROCEDURES
Do
not
attempt
alignment
unless the
following equipment
is
available.
Note: Remove line
cord antenna
from FM external antenna
terminal
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
when aligning.
AM IF
&
RF ALIGNMENT
RECEIVER
Loop Antenna
L451
Fis. 1 AM
ALIGNMENT
CONNECTION
TAPE
OUT
--l
Output
of signal
generator
should be no higher
than necessary to
obtain an output reading.
Signal Generator
Modulation: 30%
Set SELECTOR switch SWl to AM.
STEP
SIGNAL
GENERATOR
COUPLING
SIGNAL
GENERATOR
FREOUENCY
R
ECEIVER
DIAL
SETTING
INDICATOR
ADJUSTMENT
Refer Fig. 4.
REMARKS
1
Refer Fig. 1
455 kHz
(400
Hz Mod.)
Point
of non-
i nterference
(on/about
600 kHz)
AC Voltmeter
to
TAPE
OUT
jack
T402
flFT)
Adjust
for
maxi-
mum reading.
2 Same
as Step
1
600 kHz
(400
Hz
Mod.)
600 kHz
Same as Step
1
L402
(OSC
Coil)
1451
(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.)
1
000 kHz Same as Step 1 vR402
Adjust for 160
mV Audio
output.
5
Same as Step 1
1000 kHz
(400
Hz Mod.)
1000 kHz
Receiver's
SIGNAL
Meter
VR4O1
Adjust
lor 70o/o
reading of
full
scale with input
of 5 mV/m.
Note: Remove line
cord antenna
from
FM external
antenna
terminal when
aligning.
'7