WIRE LINE REMOTE BASE MODULA
nON
1.
Set-up this station in two steps:
Transmitter
modulation
and
phone
line levels.
2. Connect the Analyzer
to
the transmitter under test as shown in figure 4-16.
3. Set
DISPLAY
to DVM,
FUNCTION
switch to
Monitor,
and
MODULATION
switch to
off.
Set
MONITOR
BW
switch to
narrow
and
squelch control
to
threshold.
4. Set the
attenuator
to
-30
dB.
For
low-power transmitters, it may be necessary to reduce the
attenuator
setting
to
un-
squelch the
monitor.
Too
high
an
attenuator
setting
or
too
tight a squelch setting inhibits the
modulation
deviation
display.
5.
Enter
the
proper
transmitter
frequency. Move the display
cursor
down
to
DVM
and
enter 1 for
AC
mode.
Adjust
the
1
KHz
Level control for 1 VAC indicated
on
the display,
to
put
1 volt
of
1
KHz
test
tone
into the transmitter modula-
tion limiter.
6. Set
DISPLAY
to
Oen/Mon
Mtr. Key the transmitter
and
adjust
the transmitter.
IDC
control for 5
KHz
DEV in-
dicated
on
the display. Un-key the transmitter.
7. Follow
the
base station
phone
level setting outlined in
the
next procedure.
4-28
'--./
~
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