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3.6 FM SCAN (SEEK) SENSITIVITY CHECK
¢ Connection Diagram (shown in Fig. 28)
© To Adjust
. Set the local switch to OFF (DISTANT mode).
2. Set the unit's frequency display to 97.0 MHz and supply a
98.0 MHz
(400 Hz, 100%
modulation)
signal from the
SSG. Depress the scan (seek) button and check that the
scanning (seek) operation stops with an SSG output range
=
3.7 AM IF ADJUSTMENT
(KEX-70)
* Connection Diagram
AM SSG.
paella ds
Antenna Plug
T+)
'
mV Meter
NOTICE:
Select C1 so that total capacity of 80 pF is attained from the
direction of receiver jack.
Z: Output impedance of the S.S.G.
© To Adjust
1. Set the reception frequency to 999 kHz.
2. Supply a 468 kHz signal (400 Hz, 30% modulation) from
the SSG.
KEX-7O/73
of 29 +6 dB (zV).
3. Set the local switch to ON (LOCAL mode), repeat step 2
and check that the scanning (seek) operation stops with an
SSG output range of 49 +6 dB (pV).
Antenna Jack
ee
|
Fig. 29
3. Vary the SSG output level to between 80 and 120 dB (nV)
and, checking the output on the mV meter and oscillo-
scope, adjust T4 and T5 to bring the output to its maxi-
mum.
Reduce the SSG output to the minimum level at
which the waveforms can be monitored.
21
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