‘Ihble
7-12.
EIP
8753E Instrument
Specifications
(6 of 6)
Description
INPUT
GENERAL
(cont.)
SpecWcation
code
GBOUP
DELM
CHABACTEBISTICS
Soup
delay
is
computed
by
measurhig
the
phase
change
within
B
speciiied
frequency
step
(determined
by
the
frequency
span
and
the
number
of
points
per
sweep).
Aperture
(selectable)
(frequency
span)/(number
of
points
-1)
g-3
Maximum
Aperture
20%
of
frequency
span
S-3
l/2
x
(lAuinimum
aperture)
S-3
me
maxhuum
delay
is
limited
to
measuring
no
more
than
180
o
>f
phase
change
within
the
minimum
aperture.)
6-e
awl4
S-3
l’he
following
graph
shows
group
delay
accuracy
with
7-mm
full
Z-port
calibration
and
a
10
Hz
IF
bandwidth.
Insertion
loss
is
rssumed
to
be
<2
dB
and
electrical
length
to
be
ten
meters.
HP8753E
Typical
Group
Delay
Accuracy
100
Group Delay Accuracy vs. Aperture
n
general,
the
following
formula
can
be
used
to
determine
the
accuracy,
in
seconds,
of
speciilc
group
delay
neasurement:
*Phase
Accuracy
(deg)/360
x
Aperture
(Hz)
depending
on
the
aperture
and
device
length,
the
phase
acanacy
used
is
either
incremental
phase
accmncy
or
vorst
case
phase
accmacy.
Specifications and Measurement Uncertainties
7-16