Performance Tests Model
8904A
Characteristic Performance Limits
Option
002
Output 1-to-Output
2
fO.l
deg
or
30
ns
Phase Accuracy whichever
is
higher
Performance
Test
10
Conditions
at the same frequency;
sine
wave
OUTPUT 1-TO-OUTPUT
2
PHASE ACCURACY
(OPTION
002)
Specification
Description
Channel
A
and Channel
B
of the Multifunction Synthesizer are nominally set to the same amplitude
but with
180
deg phase difference. The two channels are summed together externally so that the two
signals in effect cancel each other. The output
is
viewed
on
an oscilloscope.
The amplitude of Channel
B
is fine adjusted to null the signal as much as possible. The phase of
Channel
B
is fine adjusted also to further null the signal. The amount of phase shift required to null
the signal is the phase error between the two channels.
NOTE
Output
1
-to-Output
2
phase accuracy
for
instruments with both Options
002
and
006
(balanced output)
is
not
specified.
Equipment
Oscilloscope
.
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. . .
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.
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.
.
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.
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.
.
.
HP
1740A
or
Tektronix
2235
HP
egra4~
-
MULTIFUNCTION
SYNTHESIZER
OSCILLOSCOPE
m
TEE
I
Figure
4-5.
Output
1
-to-Output
2
Phase Accuracy Performance Test Setup
4-32
Performance Test
10
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