Step
Input
Signal
Level
DC
VTVM
Connection
Adjustment & Function
Must
be
kept
as
low
as
Front
End I
FT
&
1 possible
to
avoid
limit-
IF
Amp
I FT101
ing
point
(Bottom
Core)
Disc. CAN.
Bottom
IF
Amp
P.C.B
IF
Amp
I FT101
2
At
No
Input
Signal
(R121, R123) (Top Core)
Disc. CAN.
3
At
No
Input
Signal
#8
Pin
VR101
IF Board
4 100µV
STEPS
5: OSCILLOSCOPE CONNECTION: FM
QUAD
Terminal
Input
Level 1 000µV
Adjust
VR102
for
flat
base
line composite MPX Signal
IF
Amp
IFT101
(Bottom Core)
Disc. CAN.
Adjust
for
Maximum
Amplitude
and
Undistortion Sine
Wave
On
Oscilloscope
OV
DC
OV
DC
Distortion Minimum
Harmonic Analyzer
VR102 UNDER
COMPENSATED
VR102 OVER
COMPENSATED
VR102 CORRECT
FM
METER
ALIGNMENT
PROCEDURE
INSTRUMENT:
FM
Signal Generator, FM Stereo Generator, AC
VTVM,
DC
VTVM
& Oscilloscope
NOTE: Set Function Switch
to
"FM
STEREO"
Set Mode Switch
to
"STEREO"
Set Volume Control
to
"MINIMUM"
The FM
Front
End the FM IF
Amplifier
must
be
completed .
. GENERATOR CONNECTION: Connect
FM
Signal Generator
to
FM
Ant
Terminal
GENERATOR FREQUENCY: 98MHz (400Hz, 75KHz Deviation)
TUNING
DIAL
SETTING: 98MHz
AC
VTVM'
OSCILLOSCOPE & DISTORTION METER CONNECTION: L,
or
R Channel Tape
Out
Terminal
FM Muting in OFF Position and Muting Threshold in
CCW
Position
Step
Input
Signal
Level
DC
VTVM
Connection Adjustment & Function
Adjust
for
1
At
No
Input
Signal
#16
Pin
VR206
DC
Minimum
Meter Board
2
40µV
#16
Pin
VR205
DC
Minimum
Meter Board
VR201
In Tune Light Turn
On
3
At
No
Input
Signal
VR202 Meter Pointer
To
Maximum
0 Quieting
4 30µV
VR203
Stereo Light Turn
On
(Stereo Signal)
-4-
To Next Page
Loading...
