I-Fagc Threshold Adjustment - Motorola MSF 5000 Instruction Manual

MSF
5000
Instruction Manual
Chapter
4
Alignment
Alignment Procedures
5.
Key
the station
by setting
the
LOC PTT MUXbus
bit
(A1/D1)
or
by
setting
the
PL Dis/Xmit
switch
to
Xmit.
6.
Measure the transmitter carrier frequency.
NOTE
If the station contains an External
Reference
Option
(C574) or
a
High Stability Oscillator
Option
(C573), and
the
frequency is out of alignment, refer
to the
appropriate alignment procedure. Otherwise proceed
to
step
8.
7.
If
necessary, adjust the
Fo Freq
Adj
warp
control
to set the
measured
transmit frequency
to the
nominal station transmit
frequency.
For UHF,
800 MHz, and 900
MHz
Analog Plus
stations, the
Fo Freq
Adj
warp
control
is
located on the
RF
Tray front panel. For
VHF
stations,
the
Fo Freq
Adj
warp control
is accessed through the top cover of the
RF
Tray. Refer to
Figure
4-14 for the
location of
the
Fo Freq
Adj.
8.
Dekey
the
station
by clearing
the
LOC PTT MUXbus
bit
(A1/D1).
9.
Set the
Acc Dis/Reset switch
to the center (normal) position.
I-F
AGC
Threshold Adjustment
The following procedure
is
only performed
on 800
MHz
and 900
MHz
Analog Plus
stations.
This
procedure adjusts the
I-F
AGC
Threshold.
This
adjustment is performed
by
the
tuning channel frequency (channel 0/
mode
0).
This allows
the station to be tuned for
all programmed
frequencies.
The I-F
AGC
Threshold adjustment (R191) is located on
the
Uniboard, and is
accessed from the top of the
RF
Tray
cover.
1.
Set the Ace Dis/Reset switch
to
Acc Dis.
2.
Using
the
Select/Set switch,
set the station to the
tuning
channel.
68P81092E04
3/19/94
4-23
MSF
5000
Instruction Manual
Chapter
4
Alignment
Alignment Procedures
5.
Key
the station
by setting
the
LOC PTT MUXbus
bit
(A1/D1)
or
by
setting
the
PL Dis/Xmit
switch
to
Xmit.
6.
Measure the transmitter carrier frequency.
NOTE
If the station contains an External
Reference
Option
(C574) or
a
High Stability Oscillator
Option
(C573), and
the
frequency is out of alignment, refer
to the
appropriate alignment procedure. Otherwise proceed
to
step
8.
7.
If
necessary, adjust the
Fo Freq
Adj
warp
control
to set the
measured
transmit frequency
to the
nominal station transmit
frequency.
For UHF,
800 MHz, and 900
MHz
Analog Plus
stations, the
Fo Freq
Adj
warp
control
is
located on the
RF
Tray front panel. For
VHF
stations,
the
Fo Freq
Adj
warp control
is accessed through the top cover of the
RF
Tray. Refer to
Figure
4-14 for the
location of
the
Fo Freq
Adj.
8.
Dekey
the
station
by clearing
the
LOC PTT MUXbus
bit
(A1/D1).
9.
Set the
Acc Dis/Reset switch
to the center (normal) position.
I-F
AGC
Threshold Adjustment
The following procedure
is
only performed
on 800
MHz
and 900
MHz
Analog Plus
stations.
This
procedure adjusts the
I-F
AGC
Threshold.
This
adjustment is performed
by
the
tuning channel frequency (channel 0/
mode
0).
This allows
the station to be tuned for
all programmed
frequencies.
The I-F
AGC
Threshold adjustment (R191) is located on
the
Uniboard, and is
accessed from the top of the
RF
Tray
cover.
1.
Set the Ace Dis/Reset switch
to
Acc Dis.
2.
Using
the
Select/Set switch,
set the station to the
tuning
channel.
68P81092E04
3/19/94
4-23