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ADJUSTMENT
r
TEST EQUIPMENT FOR ADJUSTMENT
1. Voltmeter
1) Input impedance:
Not less than 1 MO.
2) Voltage ranges:
1.5V to 1000V, AC and DC.
NOTE:
A high precision multimeter is permissible, but
won't provide accurate reading for high-impedance
circuit measurement.
2. RF Voltmeter
1) Input impedance:
Not less than 1 Mfl with input capacitance not
more than 20pF.
2) Voltage range:
10mV through 300V full scale.
3) Frequency response:
Not less than 20 MHz.
NOTE:
For adjustments requiring less precision, detector
output
may be checked with a voltmeter or
miltimeter.
3. AF Voltmeter
1) Frequency response:
50 Hz ~ 10 kHz
2) Input impedance:
Not less than 1 MQ.
3) Voltage range:
10 mV ~ 30V full scale.
2. AF dummy load
1) Impedance:
8fi non-inductive.
2) Power capacitor:
Not less than 3 watts.
5. Oscilloscope
High sensitivity with external sync in.
6. Sweep generator
1) Center frequency:
8.83 MHz.
2) Frequency deviation:
Max. +5 kHz.
3) Output voltage:
Not less than 0.1V.
4) Sweep rate:
Not less tnan 0.5 sec/cm.
5) Marker provision recommended.
7. SSG (Standard Signal Generator)
1) Output frequency range:
1.8 MHz ~ 30 MHz.
2) Output level:
0 dB/VV. -120 dB//iV.
NOTE:
1) The SSG mut be stable output frequency and
minimum frequency modulation component.
2) 0 dB = 1 MV
Z = 50J2
Open Circuit Voltage
8. Frequency counter
1) Minimum input voltage:
50 mV.
2) Frequency response:
Not less than 40 MHz.
*
9. Noise generator
1) Noise component must be similar to automobile
ignition noise, containing harmonics to above 30'
MHz.
2) Output level should be adjustable.
PRELIMINARY SETTING
1. Prior to adjustment, remove the top and bottom covers
from the unit and place it on its side.
a o a
0
6 5 n 0
Fig. 26
51
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