Performance Tests Model 8904A
Phase
Range
Accuracy
Performance
Test
8
PHASE ACCURACY (USING
A
TIME INTERVAL COUNTER)
0
to
359.9
deg
f0.05
deg
Characteristic
I
Performance
Limits
Specification
Description
Conditions
sine wave
relative to
0
deg
for a
fixed
frequency;
0.1
Hz
to
100
kHz
The timebase reference of a reference multifunction synthesizer is slaved to the timebase reference of
the
test
Multihnction Synthesizer. The synthesizers are set to the same frequency and the outputs
are connected to the
start
and stop inputs of a time interval counter.
For
convenience, the initial
phase offset (that is, the time interval) between the
two
signals
is
subtracted out (by the time interval
counter). The phase of the
test
multifunction synthesizer is set to several offsets and the time interval
measured to determine the actual phase
shift.
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 Option
002.
An alternate test
for
verifying phase accuracy
is
given in Performance Test
7-Phase Accuracy (Using an Oscilloscope).
Equipment
Multifunction Synthesizer (Reference)
..............................................
HP 8904A
Time Interval Counter..
...........................................................
HP
5370B
Procedure
output
1
NOTE
If
the instrument
has
an Option
002
and
006
combination, skip to step
5.
1.
Set up the equipment as follows. Refer to Figure
4-4.
a.
Connect the test Multifunction Synthesizer’s rear-panel
10
MHz
REF
OUT
to the reference
multifunction synthesizer’s
10
MHz
reference input. (This
slaves
the
two
synthesizers to a
common reference.)
4-26 Performance Test
8
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