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Test Descriptions
Instrument Noise Figure
6. Set the stop frequency dependant on the NFA's upper frequency range.
For the N8973A set the stop frequency to 3.0 GHz (press
For the N8974A set the stop frequency to 6.7 GHz (press
For the N8975A set the stop frequency to 26.5 GHz (press
7. Set the number of measured points to 401 (press the
then
More
,
Step 6. Models N8974A and N8975A only: run the Yig Tuned Filter alignment by pressing
System, Alignment
Step 7. Restart the NFA sweep by pressing the
Step 8. Once the single sweep is complete set the NFA to autorange (press the
and the
Autoscale
Step 9. Set the specification limit lines as follows:
1. Press the
Limit Lines
2. Set the first frequency to 10 MHz and the limit to 4.4dB, connected to
default (press
3. Dependant on the NFA being tested, repeat 2. for the remaining frequencies and
limits as detailed in Figure 2-21 thru Figure 2-23.
78
Points
,
4
,
0
,
1
,
Enter
).
and
then wait for the alignment routine to complete.
Align YTF
menu item.
key, then
Limit Line 1⇑
1
,
0
,
MHz
, [
—>|
],
4, ., 4
Stop
Stop
Frequency/Points
key.
Restart
,
Type Upper
,
Enter
or
X1
).
,
,
,
,
).
3
.
0
GHz
,
,
,
,
).
6
.
7
GHz
,
,
,
,
).
Stop
2
6,.
5
GHz
key,
Scale
key
and
.
Editor
by
Yes
Chapter 2
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