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Chapter
4
Alignment
MSF
5000
Instruction Manual
Alignment Procedures
RF TRAY COVER
Digital
Modulator
Reference
ofo
Frequency
TX VCO
EXTERNAL REFERENCE
INTERCONNECT BOARD
TUNING
SCREW
RF TRAY
CONNECTOR
PRESELECTOR
FILTER
NOTE:
External Reference Connector
is
included only
on
External Reference
Base Stations.
MSFI021
022894JNM
Figure 4-4
TX
VCO Tuning Screw
10.
Adjust
the
RX VCO
tuning
screw until Meter
5
on the
metering panel
indicates
38
+
2 WA.
11.
Rotate both
VCO
locking
cams
to
Operate.
Injection Filter Adjustment
The following procedure aligns
the
Injection
Filter
for the
tuning channel
frequency (channel
0/mode
0).
By adjusting
the Injection
Filter
to the
tuning
channel, the station
is
tuned for
a
all programmed frequencies.
The Injection Filter tuning screws
are accessed
through
the
RF
Tray
cover.
The
tuning screws
are
adjusted until
a
maximum reading
is obtained on the metering
panel.
1.
Connect
a
metering panel
to the
Rx
metering jack
on the front
left-hand side
of
the
RF
Tray using
the
metering
cable.
2.
On
the
metering panel,
set the
Meter switch
to 3
and
verify
the
reversing
switch
(+) is
set to the
+ (positive).
4-8
68P81092E04
3/19/94
CONNECTOR
Chapter
4
Alignment
MSF
5000
Instruction Manual
Alignment Procedures
RF TRAY COVE
Digital
Modulator
Reference
Frequency
O O
TX VCO
EXTERNAL REFERENCE
CONNECTOR
INTERCONNECT BOARD
TUNING
SCREW
RF TRAY
PRESELECTOR
FILTER
NOTE:
External Reference Connector
is
included only
on
External Reference
Base Stations
MSFI021
022894JNM
Figure 4-4
TX
VCO Tuning Screw
10.
Adjust
the
RX VCO
tuning
screw until Meter
5
on the
metering panel
indicates
38
+2
UA
11.
Rotate both
VCO
locking
cams
to
Operate
Injection Filter Adjustment
The following procedure aligns
the
Injection
Filter
for the
tuning channel
frequency (channel
0/mode
0).
By adjusting
the Injection
Filter
to the
tuning
channel, the station
is
tuned for
a
all programmed frequencies
The Injection Filter tuning screws
are accessed
through
the
RF
Tray
cover.
The
tuning screws
are
adjusted until
a
maximum reading
is obtained on the metering
panel
Connect
a
metering panel
to the
Rx
metering jack
on the front
left-hand side
1.
of
the
RF
Tray using
the
metering cable
2.
On
the
metering panel,
set the
Meter switch
to 3
and
verify
the
reversing
switch
(4) is
set to the
+
(positive)
4-8
68P81092E04
3/19/94
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