Motorola MSF 5000 Instruction Manual page 211

MSF
5000
Instruction Manual
Chapter
4
Alignment
Alignment Procedures
High/Low End Adjustment
The following procedure is only performed when
a
station is configured
voting
purposes.
This
adjustment provides an increase in level
at the
high and low
end
frequency response of
the
receiver audio to compensate for phone line loss.
All
voting
receivers must
be
equalized
to
provide proper voting.
This
procedure requires
a
technician at the comparator end of the
phone line and
the station
being aligned.
NOTE
Perform this procedure only
if
the
station is equipped
with
a
Spectra-TAC/DIGITAC
Encoder Option (C269)
and
will
be used for
voting. Otherwise, proceed
to the
Status Tone Adjustment.
1.
Adjust
the
STAC
Encoder Level
(EEPOT 8) to the
minimum level
(00) to
cause
a
minimum wireline status
tone output.
2.
With
an audio generator, inject
a
1
kHz
tone at
1
mV
into
the
MIC AUDIO
input
(J812-4) on the control connector or into
TP8
on the
SSCB.
NOTE
The generator must remain at
a
constant output level
from 400
Hz
to 4
kHz.
3.
Set the Intercom switch
to
On.
4.
Monitor
across
Line
2
(+) and Line
2
(-) and adjust the
Line
2
Output Level
(EEPOT C)
for -10 dB.
5.
Measure and record
the
level
at the
input
to the
comparator
(DIGITAC
input).
The difference between
the -10
dBm input and measurement at the
comparator is the phone line loss
at
1
kHz.
6.
Set the audio generator frequency to
3
kHz.
7.
Adjust
the
STAC High End Equalization Level
(EEPOT 9) so
that the
level
measured at the comparator is the same
level
recorded in step
5.
8.
Repeat steps 5 through
7
until
the
level
difference between
1
kHz
and
3
kHz
is
within +/-
1
dB. The
1
kHz
reference
level must remain
at -10 dB.
9.
Set the generator frequency to 400
Hz.
68P81092E04
3/19/94
4-45
MSF
5000
Instruction Manual
Chapter
4
Alignment
Alignment Procedures
High/Low End Adjustment
The following procedure is only performed when
a
station is configured
voting
purposes.
This
adjustment provides an increase in level
at the
high and low
end
frequency response of
the
receiver audio to compensate for phone line loss.
All
voting
receivers must
be
equalized
to
provide proper voting.
This
procedure requires
a
technician at the comparator end of the
phone line and
the station
being aligned.
NOTE
Perform this procedure only
if
the
station is equipped
with
a
Spectra-TAC/DIGITAC
Encoder Option (C269)
and
will
be used for
voting. Otherwise, proceed
to the
Status Tone Adjustment.
1.
Adjust
the
STAC
Encoder Level
(EEPOT 8) to the
minimum level
(00) to
cause
a
minimum wireline status
tone output.
2.
With
an audio generator, inject
a
1
kHz
tone at
1
mV
into
the
MIC AUDIO
input
(J812-4) on the control connector or into
TP8
on the
SSCB.
NOTE
The generator must remain at
a
constant output level
from 400
Hz
to 4
kHz.
3.
Set the Intercom switch
to
On.
4.
Monitor
across
Line
2
(+) and Line
2
(-) and adjust the
Line
2
Output Level
(EEPOT C)
for -10 dB.
5.
Measure and record
the
level
at the
input
to the
comparator
(DIGITAC
input).
The difference between
the -10
dBm input and measurement at the
comparator is the phone line loss
at
1
kHz.
6.
Set the audio generator frequency to
3
kHz.
7.
Adjust
the
STAC High End Equalization Level
(EEPOT 9) so
that the
level
measured at the comparator is the same
level
recorded in step
5.
8.
Repeat steps 5 through
7
until
the
level
difference between
1
kHz
and
3
kHz
is
within +/-
1
dB. The
1
kHz
reference
level must remain
at -10 dB.
9.
Set the generator frequency to 400
Hz.
68P81092E04
3/19/94
4-45