Figure 2-22. Input Attenuator Accuracy Test Setup
5.
Press
4
Meas
5
,
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ANALYZER TYPE
,
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SPECTRUM ANALYZER
,
4
Preset
5
to initialize the HP 4395A.
Then set the controls as follows:
Control Settings Key Strokes
Center Frequency: 50.1 MHz
4
Center
5
,
4
5
5
,
4
0
5
,
4
.
5
,
4
1
5
,
4
M/
5
Frequency Span: 120 Hz
4
Span
5
,
4
1
5
,
4
2
5
,
4
0
5
,
4
x1
5
RBW: 10 Hz
4
Bw/Avg
5
,
NNNNNNNNNNNNNNNNNNNN
RES BW
,
4
1
5
,
4
0
5
,
4
x1
5
Scale/Division: 5 dB/Div
4
Scale Ref
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SCALE/DIV
,
4
5
5
,
4
x1
5
6.
Press
4
Meas
5
,
NNNNN
R
to set the HP 4395A to the R input.
7.
Press
4
Scale Ref
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
REFERENCE VALUE
,
4
-
5
,
4
3
5
,
4
0
5
,
4
x1
5
,
4
Scale Ref
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ATTENUATOR MENU
,
NNNNNNNNNNNNNNNNNNNNNNN
ATTEN R
,
4
1
5
,
4
0
5
,
4
x1
5
, to set the HP 4395A controls to the reference setting for the test.
8. Perform the following steps to measure the input attenuator switching uncertainly.
a.
Press
4
Trigger
5
,
NNNNNNNNNNNNNNNNNNNN
SINGLE
to make a sweep.Wait for the completion of the sweep.
b.
Press
4
Search
5
,
NNNNNNNNNNN
MAX
,
4
Marker
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1MODE MENU
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FIXED 1MKR
to place the delta reference
marker on the peak of the carrier.
c. Set the HP 4395A controls as follows. This sets the input attenuator and reference level
to the rst settings listed in Table 2-20 .
Control Settings Key Strokes
Input Attenuator R: 0 dB
4
Scale Ref
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ATTENUATOR MENU
,
NNNNNNNNNNNNNNNNNNNNNNN
ATTEN R
,
4
0
5
,
4
x1
5
Reference Level:
0
40 dBm
4
Scale Ref
5
,
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
REFERENCE VALUE
,
4
-
5
,
4
4
5
,
4
0
5
,
4
x1
5
Performance Tests 2-55
To Next Page
Loading...
