Performance Tests Model 8904A
NOTE
Ignore any
high
frequency "fuzziness"
on
the
signal.
The
only
concern
is
to
minimize
the
10
kHz
component.
6.
On the Multifunction Synthesizer under test, press
PHASE
then press the
0
or
U
keys a few
times to locate the null
of
the 10 kHz signal. The null should occur between 179.9 and 180.1 deg.
(At
10 kHz, 0.1 deg phase shift represents
a
delay of 28 ns.)
Phase Null: 179.9 180.1 deg
7. On the Multifunction Synthesizer under test, key in
FREQ
100
kHz
AMPTD
1
V
PHASE
180
deg
8. On the reference Multifunction Synthesizer, key in
AMPTD
1
V.
9. On the Multifunction Synthesizer under test, press
AMPTD
then press the
0
or
U
keys, if
necessary, to minimize the 100 kHz signal on the oscilloscope as was done in step
6.
10. On the Multifunction Synthesizer under test, press
PHASE
then press the
0
or
0
keys
a
few
times to locate the null
of
the 100 kHz signal. The null should occur between
178.0
and 182.0
deg.
(At
100 kHz,
1
deg phase shift represents a delay of 28 ns.)
Phase Null: 178.0 182.0 deg
4-36
Performance Test
11
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