Performance Tests
Model 8904A
Characteristic
Digital
Sequence
Period
Duration
Period
Accuracy
Performance
Test
14
Performance
Limits
Conditions
Option
001
0.1
to
655.35
ms
f20
ps
DIGITAL SEQUENCE PERIOD ACCURACY (OPTION
001)
Specification
Description
A
repetitive squarewave with
an
on-time of
100
ps
and
an
off-time of 900
ps
is set up on
an
oscilloscope.
The on-time period
is
measured directly.
NOTE
For
instruments with Option
006
(balanced output), digital sequences are
not
useable
and
are
not
specified.
Equipment
Oscilloscope
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.
.
HP
1740A
or
Tektronix 2235
Procedure
1.
Connect the Multifunction Synthesizer
OUTPUTS
1
HIGH
output to the high-impedance, ac
coupled oscilloscope’s input.
2.
On the Multifunction Synthesizer, press
SHIFT
PRESET.
After the instrument presets, key in
NEXT NEXT
fl
(Digital Sequence)
NEXT
SHIFT
FLOAT
1 OFF
fl
(Seq Base Hex)
fl
(Seq Base Bin)
f2
(On
Lev)
1
V
NEXT
f4
(Edit Sequence)
1000000000
f2
(Seq End)
10 ENTER
NEXT
f2
(Continuous)
3. Adjust the oscilloscope’s vertical gain, sweep speed, and triggering to view the
100
ps
pulse
of
the waveform from the Multifunction Synthesizer. The on-period should be between
80
and 120
ps.
(The observed pulse-width jitter should be included
as
part
of
the
on-period error.)
On-Period
80
120
pus
Performance Test
14 4-43
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