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ADJUSTMENT
I
I
I
2. TRANSMITTING
(BASE STATION)
Test
(1)
(2)
(3)
(4)
(5)
(6)
Equipment
RF Electronic
Voltmeter
Linear detector
Frequency
Counter
AF Oscillator
Dummy Load (50 ohm)
AC Adaptor (DC 9V --- center minus)
1. TX LEVEL
(1)
(2)
(3)
Connect a RF electronic
voltmeter
with 50 ohm pro-
be, and switch S104 to the CNIO1.
Set switch S104 to the CARR position.
Adjust T201 so that the reading
of the RF electronic
voltmeter
is maximum
at 50 ohm scale (about 4 dBm
typical).
2. TX FREQUENCY
(1) Connect a frequency
counter and switch S104 to the
CN101.
(2) Set switch S104 to the FREQ position.
(3) Adjust
CT101 so that the reading
of the frequency
counter is 30.225 MHz iO.5 kHz.
Unit
Condition
(1)
(2)
Set a
S403 "RINGER" to OFF
position.
Set a S404 "CPC" to OFF position.
Setting band :4 channel (30.225 MHz)
(3)
Select
channel
4 by "FFWD"
button
pushed
fout
times at speedy. Confirm at Frequency
Counter
Push "PLAY"
button.
3. TX LINE MODULATION
(1)
(2)
(3)
Connect
a Linear detector
and switch
S104 to CN
101.
Set switch S104 to the MOD position.
Connect
an AF oscillator
(1 kHz) and AF-VTVM
to
(4)
(5)
TEL line.
Adjust an AF oscillator
so that the reading of the AF-
VTVM is -20 dBm.
Adjust VR603 so that the reading of the linear detec-
tor is 2.0 kHz fO.1 kHz dev.
4. TX DATA MODULATION
(1) After
TX
LINE
MODULATION
adjustment,
push
"REW"
button.
(2) Adjust VR602 so that the reading of the linear detec-
tor is 4.5 kHz tO.1 kHz dev.
t
STEP
CONDITION
ADJUST
ADJUST
VALUE
SPECIFICATION
1.
TX LEVEL
S104
: CARR
SIDE
T201
Maximum
Level
-4.0 dBm
t 1.5 dBm
1
[
1
2.
TX FREQUENCY
I S104
: FREQ
SIDE
CT101
30.225 MHz
\ 30.225 MHz t 0.5 kHz
1
3.
TX LINE
S104 : MOD
SIDE
VR603
2.0 kHz Dev.
2.o
to.1
kHz dev. (1
kHz)
MODULATION
OSC OUT : -20dBm
4.
TX
DATA
S104
: MOD
SIDE
VR602
4.5 kHz Dev.
4.5 f
0.1
kHz
dev. (1 kHz)
MODULATION
OSC OUT : -20dBm
CARR
L101(H)
RF
AF
Loop
TEL
LINE
(DPX side)
S104
o
Oscillator
Simulator
Electronic
MOD
TEST
GND
Voltmeter
T
Dummy
Mod : lkHz
(IEij
q.L)
='-
50 Otlln
Linear
Detector
–23-
.
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