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3.
ALIGNMENT
SETUP
AND
SPECIFICATIONS
To align the radio using the
Radio Service Software,
do the following:
a. Turn the
radio off.
b
Connect the
radio to
be aligned
to the
test equipment
as
shown
in
Figure 2.
c.
Connect the
output of
the
RIB
box
(0180353A74)
to
the serial
port of
an IBM
PC
computer or 100% IBM
PC
compatible computer.
d
Connect the 0180357A57 RIB
box power supply to the
RIB
box, and plug the
RIB
box power supply
into
an
ac
outlet.
ea.
Set
the radio power supply to 7.5 volts de.
f
Connect the
radio remote
antenna cable (part
of the
RTK-4203
programming/test
cable)
to the
rf
power input
of the communications monitor.
Turn on the radio to be aligned.
h
Refer
to
the Radio
Service
Software
(RSS)
manual,
68P81060C25,
for the alignment procedure.
Refer
to
Table 5, Alignment
Setup
and Specifications, while performing the
RSS
alignment procedure.
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TEST
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AC/DC
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RTX-40058
AUDIO
INPUT
1
MOD
OUTPUT
AUX
MOD
IN
COMPUTER INTERFACE
CABLE
71
POWER
SUPPLY
RADIO
INTERFACE
BOK
|
TAY
01-80357A57
01-80959A74
Figure 2, Alignment Setup
Table
5.
Alignment Setup and
Specifications
Refer
to
the Radio
Service
Software manual, 68P81060C25,
for detailed alignment procedure.
Note:
During alignment, the radio is controlled by the
Radio Service Software. Do not operate
the radio's
controls during alignment, since this may
result
in
improper tuning.
Test
Name
Test Setup
Tune Target
Test Limits
Tx
RF
Power
Set
communications
monitor to
measure
rf
power
H33 Models
Low
output level:
1.28 Watts
1.0
-
2.0 Watts
High output level:
2.8 Watts
2.5
-
3.5 Watts
H43 Models
Low
output
level:
2.8 Watts
2.5
-
3.5 Watts
High output level:
6.25 Waits
5.8
-
7.0 Watts
H43
Model with
H366
Option:
5.3 Watts
49
-
6.0 Watts
Oscillator Adjust
Set
communications
monitor to
Error
<120Hz
Error
<500 Hz
measure
rf
frequency
Deviation Limit
Connect audio generator
to
AUDIO
4.4 kHz
Nominal
3.9
-
4.8 kHz
INPUT
on
test set.
Set
frequency
to
1000Hz.
Set
input
level to
2 Volts rms.
Deviation
Connect audio generator
to
AUX
Within
0.35 dB
Within 1.0
dB
Balance
MODULATION
connector on
(4.1%)
(12.2%)
RTK-4203A
test cable. Set audio
output level for
350
mV.
Set
audio
«
generator
frequency to 1000 Hzor,
_
20 Hz
as
specified
in
the alignment
procedure.
Signalling Deviations
Deviation
limits and deviation
balance
must be aligned before tuning
signalling deviations. External
modulation inputs
are not
used
during
these alignments. Disconnect any
external modulation inputs.
Set
communications
monitor to
measure
deviation.
DTMF
with
Connect Tone:
4.0 kHz
Nominal
3.3
-
4.7 kHz
DTMF
Only:
3.0 kHz
Nominal
2.5
-
3.5 kHz
DTMF
with
PL:
3.75 kHz
Nominal
3.0-
4.5 kHz
ISW
Only:
3.0 kHz
Nominal
2.4
-
3.6
kHz
DVP
Only:
4.0 kHz
Nominal
3.5
-
4.5 kHz
Threshold Squelch
Set
communications
monitor
rf
output
Per
RSS
Manual
0.5
pV
Maximum
e000
e000
TEST
BOX
METER
INPUT
IBM
PC
En
POWER SUPPLY
(Air Test Mode
or
frequency to
the
recsive
Conventional Channels)
frequency.
Set
rf
output level to
<-140
dBm or no output while
adjusting squelch setting per
RSS
manual alignment procedure.
Once
squelch value has been sot, increase
communications
monitor
rf
output level
until
squelch opens. This level is
called
"threshold squeich."
82
MAEPF-20712-0
13
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