User`s guide

124 Chapter 4
Performance Tests
3. Multiple Response Rejection Test
Performance Tests
44.On the spectrum analyzer, press CENTER FREQUENCY and tune to the frequency for the
corresponding band listed below:
for an 11974A: 40.00 GHz
for an 11974Q: 50.00 GHz
for an 11974U: 60.00 GHz
for an 11974V: 75.00 GHz
45.On the spectrum analyzer, press the following keys:
MARKER
NORMAL
PEAK SEARCH
PRESEL PEAK
46.When the preselector-peak routine is complete, press PEAK SEARCH.
47.Record the marker frequency in Table 4-9 on page 144 as Signal Frequency #3.
48.On the spectrum analyzer, press MARKER
∆.
49.On the spectrum analyzer, press
CENTER FREQUENCY and tune to a multiple response
by entering the frequency value for the corresponding band listed below:
for an 11974A: 32.064280 GHz (n
′
= 10+)
for an 11974Q: 41.720233 GHz (n
′
= 12+)
for an 11974U: 50.053567 GHz (n
′
= 12+)
for an 11974V: 65.665175 GHz (n
′
= 16+)
50.Record the above frequency in Table 4-9 on page 144 as Multiple Response Frequency
#7. Press
PEAK SEARCH to place the delta marker at the top of the multiple response.
The absolute value of the delta marker amplitude is the multiple response rejection.
51.Record the multiple response rejection in Table 4-9 on page 144 as Multiple Response
Rejection #7.
52.On the spectrum analyzer, press
CENTER FREQUENCY and tune to the next multiple
response by entering the frequency value for the corresponding band listed below:
for an 11974A: 32.578520 GHz (n
′
= 10−)
for an 11974Q: 42.255900 GHz (n
′
= 12−)
for an 11974U: 50.589233 GHz (n
′
= 12−)
for an 11974V: 66.227625 GHz (n
′
= 16−)
53.Record the above frequency in Table 4-9 on page 144 as Multiple Response Frequency
#8. Press
PEAK SEARCH to place the delta marker at the top of the multiple response.
The absolute value of the delta marker amplitude is the multiple response rejection.