Pioneer KEX8547ZT-91/EW Service Manual page 40

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QQ
3 7 63 1515 0
AM NOISE CANCELER ADJUSTMENT
A
Connection:
SSG
2-signal pad
Pulse generator
(equivalent to HP8011A)
Setting of the pulse generator. (setting of superimposed pulse)
B
50us
5ms
Adjustment:
1. Setting of SSG
Receiving frequency
Percentage modulation : 30%
C
Modulation frequency : 400 Hz
Antenna input
2. Tune a RADIO to the "999kHz" with 1 condition.
3. .Mix signal with the above-mentioned pulse and
TE
L 13942296513
SSG moduration OFF .
4. Variable resistance adjust noise level to a
minimum.
Adjustment point : VR561
D
E
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F
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KEX-M8406ZT
KEX-M8547ZT/EW
AM dummy
KEX-M8647ZT/EW
KEX-M9406ZT
Pulse width :50µsec
4Vp-p(EMF)
Pulse intervals :5msec
Pulse voltage :4Vp-p
: 999 kHz
: 74 dBµV (EMF)
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KEX-M8547ZT/EW
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8
Output
Noise meter
Q Q
3 6 7 1 3
u163
.
3
4
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
m
co
4
9 9
2 8 9 9