Performance Tests Model 8904A
Characteristic
Phase
Range
Performance
Test
7
Performance
Limits
0
to
359.9
deg
PHASE ACCURACY (USING AN OSCILLOSCOPE)
Specification
Accuracy
f0.05
deg
Conditions
sine
wave
relative
to
0
deg
for a
fixed
frequency;
0.1
Hz
to
100
kHz
Description
The timebase reference of a synthesized signal generator is slaved to the timebase reference of the
Multifunction Synthesizer. The frequency of the reference synthesizer is set
to
exactly 10 times the
frequency of the Multifunction Synthesizer. The synthesizer outputs are connected to the
X
and
Y
inputs of an oscilloscope. The phase of the reference synthesizer is adjusted
so
that the Lissajous
pattern generated on the oscilloscope display aligns with itself. The phase of the Multichannel
Synthesizer is then stepped
in
18
deg increments and the alignment of the pattern
is
checked for
each step.
NOTE
Phase accuracy for Output
1
in instruments with Option
006
(balanced
output)
is
not specified. However,
if
the instrument
has
Option
002
and
006,
perform the portion of this test for Output
2.
An alternate test for verifying phase accuracy
is
given in Performance Test
%Phase Accuracy (Using a Time Interval Counter).
Equipment
Oscilloscope
.....................................................
HP
1740A
or Tektronix
2235
Synthesized Signal Generator
......................................................
HP
3325A
4-22
Performance Test
7
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