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TM-642A
26
ADJUSTMENT
Required Test Equipment
1. Tester and DC V.M
Use a tester
with high input
impedance.
2. RF VTVM (RF VM)
Input
impedance:
1 M
ohms or more, 2 pF or less
Voltage range: FS = 10
mV to
300
V
Measurable
frequency: 1,300
MHz
(maximum)
3.
Frequency counter
(F counter)
Input sensitivity:
Approximately
50
mV
Measurable
frequency:
1,300 MHz or more
4. DC power supply
Voltage: 10 to 17
V (variable)
Current 12 A or more
5.
Power meter
Power measurement
ranges
:
100
W
,
50
W,
and 15
w
Input
impedance:
50
ohms
Measurable
frequency:
1,300 HMz
6.
AF vacuum voltmeter
(AF VM)
Input
impedance:
1
M
ohms or more
Voltage range: FS= 1
mV
to 30
V
Measurable
frequency:
50 H:z to
10 kHz
7.
AF generator (AG)
Output frequency:
100
Hz to
1
0
kHz
Output voltage: 0.5
mV
to 1
V
8.
Linear detector
Measurable
frequency:
1,300
MHz
9.
Spectrum analyzer
Measurable
frequency:
1,300
MHz
10. Directional coupler
11 .0scilloscope
Use
a high-sensitivity
oscilloscope w ith horizontal
input
socket.
12.SSG
Use
an
SSG
that
produces a frequency
of 20
to 1,300
MHz with
amplitude and frequency modulation
.
Output level:
0.111V
to 100
mV
13.Dummy
resistor
Use
an 8-ohm resistor
exceeding
the
rated
value
in
each band
.
14.
Noise generator
Use a noise
generator
whose output
contains
a high-
frequency component
of more
than
1,300 MHz
(near
ignition noise)
.
15. Sweep generator
Use
a
sweep generator that
can sweep the 1,300
MHz
band.
16. Tracking generator
Preparation
•
Set controls to the position shown
in
Table 22
unless otherwise specified.
POWER
SW
OFF
AF
VOL
VR
MIN
SOL VOL VR
MIN
Table 22
{When
viewed from
the
front of the set)
Fig.
58
Microphone Socket
(on
Front Panel)
•
Use an
insulated
tool
such
as
a
plastic
tool
du
ring
adjustment (especially
trimmer coi
l
adjustment).
•
For SSG
protection,
do not connect a
microphone
to
the
microphone socket during
receiver
block adjust-
ment.
•
Check that
the
power
switch
is
off before the power
cord is con nected.
•
The
SSG output
level is
displayed at
t
he
release
end
.
•
After
setting
the
various controls
as
shown in
Table
22. make sure
that
the indications
of
the
display and
the LEDs are
as
shown
in
Figure
59
when
the
POWER switch
is
turned
ON while
pushing
the
MR
key.
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Fig. 59
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