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Midland SYN-TECH 70-050 - Page 18

Midland SYN-TECH 70-050
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ALIGNMENT
INSTRUCTIONS
70-050/055
POWER
AMPLIFIER
ALIGNMENT
5.
Adjust
R
V
50
2
(PA)
maximum
clockwise
and
adjust
CV501,
CV502
and
CV
503
for
maximum
RF
output
power.
Readjust.
RV502
for
50
watts
RF
output.
MODULATION
ADJUSTMENT
6.
If
the
CTCSS
option
is
installed,
select
any
channel
programmed
for
CTCSS
encode.
Key
the
transmitter
and
adjust
RV1
on
the
CTCSS
board
for
the
desired
CTCSS
modulation.
7.
Input
audio
modulation
of
2500
Hz
and
adjust
RV101
(TX)
for
5
kHz
deviation.
Adjust.
L101,
L102
and
L105
for
maximum
deviat.on
and
balance.
Vary
the
modulating
signal
level
to
insure
deviation
does
not
exceed
+_
5
kHz.
OSCILLATOR
FREQUENCY
ADJUSTMENT
8.
Monitor
the
frequency
of
the
transmitted
signal
and
adjust
CV701
for
the
correct
frequency.
NOTE:
RV
102
and
LI
18
are
factory
set
and
should
not
require
field
adjustment..
If
adjustment,
is
necessary,
see
the
supplementary
alignment,
instructions.
9.
Pivot
the
PA
assembly
to
its
original
position
and
tighten
the
4
retaining
screws.
RECEIVER
ALIGNMENT
L.
0.
AMPLIFIER
ALIGNMENT
1
Select
a
channel
with
a
receive
frequency
near
the
center
of
the
programmed
frequencies.
Monitor
CM202
Pin
1
(
p
o
s
i
t
i
o
n
2)
and
adjust
L209
and
L210
for
a
maximum
indication.
RF-IF
ALIGNMENT
2.
Connect
an
on-channel
signaL
generator
to
the
antenna
connector.
Adjust
L201
,
L
20
2
,
L204
and
L205
for
maximum
indication
at.
CM202
Pin
2
(
posit
ion
(3).
3.
Adjust
L208
and
L251
for
minimum
audio
distortion.
QUADRATURE
COIL
ALIGNMENT
4.
Adjust
L
2
5
2
for
maximum
audio
output.
TIGHT
SQUELCH
ADJUSTMENT
5.
Adjust
RV
2
51
for
the
desired
light
squelch
sensitivity.
18

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