Table of Contents
Advertisement
CAUTION
Turn off the ac power on the 11974-60028 Preselector Power Supply prior to
connecting or disconnecting it from the 11974.
On the 11974 rear panel, set the instrument select switches to the
appropriate settings before applying power to the 11974.
7. Set the spectrum analyzer to the appropriate millimeter band by using the following
controls:
SHIFT ⇑ ⇑
for an 11974A:
SHIFT ⇑ ⇑ ⇑
for an 11974Q:
SHIFT ⇑ ⇑ ⇑ ⇑
for an 11974U:
SHIFT ⇑ ⇑ ⇑ ⇑ ⇑
for an 11974V:
8. Set the spectrum analyzer controls as follows:
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz
RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Hz
VIDEO BW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Hz
ENTER dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 dB
9. Set the spectrum analyzer center frequency by pressing
entering the corresponding frequency value for the band listed below:
for an 11974A: 26.5 GHz
for an 11974Q: 33 GHz
for an 11974U: 40 GHz
for an 11974V: 50 GHz
10.Set the conversion loss to the value recorded for this frequency in
by pressing
, 5, and
SHIFT
page 140. Press
dB
11.Set the spectrum analyzer reference level by pressing
the corresponding value for the band listed below:
for an 11974A: − 80 dBm
for an 11974Q: − 80 dBm
for an 11974U: − 80 dBm
for an 11974V: − 80 dBm
12.On the spectrum analyzer, press
average function to average 10 traces.
13.After the video average counter reaches 10, press MARKER
. The marker amplitude is the displayed average noise level.
PEAKSEARCH
Chapter 4
, and entering the conversion loss value from
MHz
to terminate the entry. Record this value in
,
SHIFT
VIDEO BW
4. Displayed Average Noise Level
CENTER FREQUENCY
Table 4-7
Table 4-10
REFERENCE LEVEL
, 10, and
to activate the video
Hz
and
NORMAL
Performance Tests
and
on page 140
Table 4-7
on
on page 146.
and entering
127
Advertisement
Table of Contents
