Agilent Technologies 4395A - Page 354

Dynamic
A
ccuracy
Phase
Dynamic
A
ccuracy
Typical
phase
dynamic
accuracy
can
be
expressed
by
the
following
equations:
Magnitude Dynamic
A
ccuracy
=
E
d1p
+E
d2p
+E
d3p
E
d1p
=
1
:
00L
2
E
d2p
=
0 :
10
E
d3p
=
6
:
13
2
10
0
5
L
where
,
L
=
Measurement
level
(linear
,
relative
to
full scale
level)
E
d1p
=
Phase
compression
error
(dominant
at
high
measurement
level range)
E
d2p
=
Phase
residual
error
(dominant at
middle measurement
level range)
E
d3p
=
Phase
A/D
converter
dierential
nonlinearity
error (dominant
at low
measurement
level
range)
Determining
Relative
Phase
Dynamic
A
ccuracy
Error
Contribution
Typical
dynamic
accuracy
error
contribution
to
system
performance
is expressd
bellow:
Phase
dynamic
accuracy
error =
j E
d1pMEAS
0
E
d1pREF
j
+
max(E
d2pMEAS
;
E
d2pREF
)
+
E
d3pMEAS
+
E
d3pREF
where
,
Sux
ref
means
errors
at
calibration
Sux
meas
means
errors
at
DUT
measurement
Six
example
graphs
are
provided:
Figure 11-24
and Figure
11-25 show
the typical
magnitude
and
phase
dynamic
accuracy
error
with a
reference power
level of
full scale
,
Figure
11-26
and
Figure
11-27
with
a
reference
power
level
of 0
20 dB
from full
scale
,
and
Figure
11-28
and
Figure
11-29
with
a
reference
power
level
of 0
60 dB
from full
scale
.
11-38 Specications and Supplemental Characteristics