7.
Stereo
separation
Set
F
M
generator output
to
1000
juV, modulate
in
mono only.
8.
Adjust
VR
4
for identical
outputs
in the
two channels.
TOLERANCE
+/-
20
mV.
9.
Modulate
FM
generator left channel
only
and
adjust
VR 5
for
minimum
on right channel
VTVM.
10.
Modu
late
FM generator right
channel only
and
adjust
VR 5
for
minimum
on
left channel
VTVM.
11.
If
the
minimum
in step 9 and 10
are different,
adjust VR 5 so that the readings
are
the
same
in both channels.
SPECIFICATION
better than
40 dB
separation.
12.
MPX
filter
Turn
off audiomodulation, leaving pilot
tone
only. Disable
IMF filter or external
19
kHz filter if used.
1
3.
Adjust
LPF 1 left channel and LPF 2
right
channel for minimum
output.
SPECIFICATION more than
60 dB
suppression.
14.
Release
the
DYN
SEP
DEFEAT
switch
(out),
DYIM
SEP
ADJUSTMENTS.
1.
Turn
VR
6
—
VR 7
and
VR
8 fully clockwise.
2
DYN
SEP
separation
effect.
Observe
output from left channel with FM generator output
level
1000
/iV
and
mdoulated
1
kHz left channel
only.
Reduce
audiomodulation
only from
stereo
generator
so that
left channel output is reduced by
6
dB
(50%
stereo
modulation).
The.
19
kHz
pilot signal
MUST REMAIN modulated
8
-
10%.
3.
Set
FM
generator output to
50
/iV
and adjust
VR 7 for
-
30
dB separation
left to right channel.
TOLERANCE
+/-
2 dB
4.
Switch
modulation to right
channel
only
while
maintaining
the
same
modulation
level.
Adjust
VRSfor
—
30dB
separation right
to
left
channel.
TOLERANCE
+/-
2 dB.
5.
DYN
SEP auto
defeat
level.
Set
generator
output
to
200
juV
and
adjust
VR 6
so that
separation starts increasing when
watching left
channel
VTVM.
Adjust
FM generator output
up and down
around
200
iiW
and make
sure switching occurs
around
200 fJLV.
TOLERANCE
+
100
/
-
30
juV.
SYNTHESIZER
FREQUENCY.
1.
Tune
to a
known
accurate
frequency
source,
i.e.
broadcasting station
or synthesized
/
digital
display FM
generator,
preferably
in the midband
(95
—
100
MHz),
2.
Connect
DMM
acrosTP2 (negative) and
TP
1
(positive).
3.
Adjust
VC 2 so that DMM
reads the same
as
recorded
in E
—
7,
TOLERANCE
+/-
10
mV.
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