Performance Tests Model 8904A
Characteristic Performance
Limits
Option
005
Unit-to-Unit
Phase
fO.l
deg
or
60
ns
Accuracy whichever
is
higher
Performance
Test
11
Conditions
0.1
Hz
to
100
kHz
UNIT-TO-UNIT PHASE ACCURACY (OPTION
005)
J
SYNC CLOCK INPUT
Q
RESET INPUT
Specification
ggggs~ggg
nnnnnnnnn
noon
SYNC CLOCK INPUT
Description
‘pwo
Multifunction Synthesizers are synchronized together: one as the master and the other
as
a slave.
Output
1
of each synthesizer
is
nominally
set,
to the same amplitude but with 180 deg phase difference.
The two outputs are summed together so that the two signals in effect cancel each other. The summed
signal is viewed
on
an
oscilloscope.
The amplitude of reference synthesizer
is
fine adjusted to null the signal as much
as
possible. The
phase
is
then fine adjusted
to
further null the signal. The amount of phase shift required to null the
signal is the phase error between the
two
instrument outputs.
annnnnnnn
onno
nannnnnnn
oonnonnnn
no
yo00
Equipment
Oscilloscope
.....................................................
HP
1740A or Tektronix 2235
Multifunction Synthesizer (reference)
....................................
HP 8904A Option
005
Power Splitter,
Four
Way
(2
required)
....................................
Mini-Circuits ZSC-4-3
Figure
4-6.
Unit-to- Unit Phase Accuracy Performance Test Setup
4-34 Performance Test
11
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