14.
AMPLITUDE FIDELITY
TEST (SA)
Description
This test
chec
ks the
4395A amplitude
delity
at
RBW
of
10
kHz.
A
50.1
MHz
CW
signal
is
applied
to
the
4395A
R
input
through
a
step
atten
uator.
The
signal
amplitude
is
v
aried b
y
inserting
kno
wn
attenuation
values.
Each
signal amplitude
[dB]
is
measured
to
a
reference
value
at
the
atten
uator
setting
of
10
dB.
Then
the
measured
v
alues
are
compared
with
to
the
inserted
atten
uation's
calibrated
v
alues.
The
amplitude
delit
y
p
erformance
at
RBWs
3 kHz
are not
tested in
this test.
The
error sources
at RBW
3
kHz are
exactly
same
as
those
of
the
magnitude
ratio
dynamic
accuracy
in
the
4395A
net
w
ork
analyzer
mo
de.
Because
the
dynamic
accuracy
is
tested
in
the
Magnitude
R
atio/Phase
Dynamic
A
c
cur
acy
Test
,the
delity
test
at
the
RBW
3
kHz
is
omitted.
The
amplitude delit
yp
erformance
at
lo
w
signal
lev
els
are
not
tested
in
this
test.
That
is,
the
delit
y
is
not
c
hec
k
ed
at
signal
lev
els
0
60
dB
(from
the
reference
lev
el)
at an
RBW
of
10
kHz
and
at
signal lev
els
0
50
dB
(from
the
reference
lev
el)
at
an
RBW
of
1
MHz.
These
tests
are
not
necessary
b
ecause
the
delit
y
p
erformance
at these
levels
are theoretically
determined b
y
the
delit
y
at
higher
signal
lev
els
and
the
delit
y
at
an
RBW
of
3
kHz.
6
and
10
dB
xed
atten
uators
with
a
VSWR
of
1.015
are
connected
to
the
signal
generator
output
connector and
the 4395A
S
input,
resp
ectiv
ely
.
These
xed
atten
uators
are
used
to
reduce
the
measuremen
t
uncertain
ties
caused
b
y
mismatc
h error.
When
they
are
used,
the
measuremen
t
uncertain
ties
listed
in
the
p
erformance
test
record
are
v
alid.
Specification
Amplitude
delit
y
Log
scale
Range
(relativ
e
to
full
scale
input
lev
el)
Amplitude
Fidelit
y
1
0
dB
range
>
0
30 dB
6
0.05
dB
0
30
dB
>
range
0
40 dB
6
0.07
dB
0
40
dB
>
range
0
50
dB
6
0.15
dB
0
50
dB
>
range
0
60
dB
6
0.35
dB
0
60
dB
>
range
0
70
dB
6
0.8
dB
0
70 dB
>
range
0
80 dB
6
1.8 dB
1
@23
6
5
C, RBW = 10 Hz,
0
20 dBm
ref. value
+30 dBm,
ref. input level
=
ful l sc
ale input level
0
10 dB
Test Equipment
Signal Generator
::::
:::::::::: ::::: :::: ::::: :
::::::::: ::::: ::::: ::::: :
::::::::: ::::
8663A
Step A
ttenuator
1
, 10 dB step, VSWR
1.02
::::::: :::: :::
:::::::
8496G Opt. 001 and H60
Attenuator Driver
::::::: :::: ::::: ::::: ::::: ::::: ::::: ::::: :::::::::: ::::: ::::: ::::
11713A
Type-N Cable, 61 cm (two required)
:::::::::: :::: ::::: ::::: :::::
11500B or part of 11851B
BNC cable, 122 cm
::::::::: ::::: ::::: ::::: ::::: ::::: ::::: ::::: ::::::::: ::::
PN 8120-1840
6 dB Fixed Attenuation, VSWR
1.015
:::::::::: ::::: ::::: :
8491A Opt. 006 & Opt. H60
10 dB Fixed Attenuation, VSWR
1.015
::::::: ::::: ::::: :::
8491A Opt. 010 & Opt. H60
Performance Tests 2-53
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