CHANNEL
SIGNAL
FREQUENCY
PE.RIOD
AMPLITUDE
1
C2SINEWAVE
65HZ
15.29 msec. 6.2VP-P
1
C5SINEWAVE
523HZ
r
1.91
msec.
6.4VP-P
1
C8
SINEWAVE 4186HZ
239
Jlsec.
6VP-P
Location
U21,
Pin
2
on
the Channel board.
During the
approximately 1 second of input sampling, the input
signal can be checked with the scope at U60,
Pin
13. This
is
the
AID
converter input pin.
SPECIAL
NOTE:
Testing
the
digitizer
at
sampling
rates
greater
than
15KHz.
The diagnostic chips are not capable of testing the digitzer at
rates higher than 15KHz.
If the unit passes all diagnostic tests, the
digitizer may be tested at rates above 15KHz. using the
following
procedure:
4.30 - 50KHz.
SAMPLING OPTION DIAGNOSTIC TEST
NOTE: The instrument must pass all other diagnostic tests
before proceeding with this test.
An
incorrect fault diagnosis may
result if this is not done.
Kurzwell
250
Service Manual, Chapter 4
4 - 5 6
(
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