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ADJUSTMENT
k
Adjustment (T-2)
600!2
Unit
7
RF IN
CNIOI (H)
AF
Loop
(TEL line)
Linear
Oscillator
Simulator
Detector
CN101 (E)
I
IC301 17pin
GND
Power
+w–
J
w
supply
2201JF/10V
48V~C
I
I
(FIG-3)
STEP
CONDITION
ADJUST
ADJUSTED VALUE
SPECIFICATION
I
1
1
3. LINE Mod.
OSC OUTPUT:
1kHz
VR601
2.OkHz dev.
2.0 * 0.1 kHz dev.
I
77.5mV
(at 7th)
I
(-20dBm)
I
300Hz
I
-----
I
-----
I
1.4 A0.3kHzdev
1
!
1'
3kHz
...-.
-----
3.0 * 0.5kHz dev.
I
I
I
1
1
4. DATA Mod.
-----
-----
-----
3.8 k 1.OkHz dev.
(at 7th)
(TABLE-3)
1-3.
RECEVING
(See FIG-4, TABLE-4)
Test Equipment
FM SSG (50Q : OPEN TYPE)
AF Voltmeter (AFVM)
AC Adaptor (DC 9.OV ..... CENTER MINUS)
Unit Condition
a)
b)
c)
d)
e)
f)
9)
h)
Distortion Meter
Dummy Load (600Q)
Disconnect IC401 pin23 and ground.
Select TEST CH '8' by pushing "PAGE key.
Disconnect AF oscillator from TEL line, and connect AF voltmeter
in
&
Disconnect Linear detector from CN101 and connect FM SSG (1 kHz, 2.5kHz dev., 39.9000MHz,
46dBp) to CN1 01.
EWE
EbLBE
N= I EVEL
Align T301 to obtain maximum deflection and minimum distortion from the read of AC voltmeter and distortion
meter respectively.
Change output level of FM SSG from 46dBp to 12dBp.
Align T101 to obtain minimum distortion at the distortion meter. (less than 107.)
Change output level of FM SSG from 12dBp to 46dBp.
Align
VR302
to obtain
–6dBm
* ldB
from
read of AC voltmeter,
and confirm
at the FM SSG
input
of 300Hz
: the output of AFVM
–10.OdBm A 3dB
3kHz
: the output of AFVM
–10.OdBm * 3dB
Auto scan level Adjustment
Change output level of FM SSG to 15dBp.
Align VR301 the output of AFVM changes from low level to high level.
Change output level of FM SSG to 10dBp, and confirm the output of AFVM is low level.
Change output level of FM SSG to 20dBp, and confirm the output of AFVM is high level.
G&
-15-
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