Agilent Technologies 11974 Series, User Manual

Page: 123 / 156

122 Chapter 4
Performance Tests
3. Multiple Response Rejection Test
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26.On the spectrum analyzer, press
CENTER FREQUENCY
and tune to the frequency listed
below for the corresponding band:
for an 11974A: 33.25 GHz
for an 11974Q: 41.50 GHz
for an 11974U: 50.00 GHz
for an 11974V: 62.50 GHz
27.On the spectrum analyzer, press the following keys:
MARKER
NORMAL
PEAK SEARCH
PRESEL PEAK
28.When the preselector-peak routine is complete, press
PEAK SEARCH
.
29.Record the marker frequency in Table 4-9 on page 144 as Signal Frequency #2.
30.On the spectrum analyzer, press MARKER
∆
.
31.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: 26.664280 GHz (n
′
= 10+)
for an 11974Q: 34.636900 GHz (n
′
= 12+)
for an 11974U: 41.720233 GHz (n
′
= 12+)
for an 11974V: 65.665175 GHz (n
′
= 16+)
32.Record the above frequency in Table 4-9 on page 144 as Multiple Response Frequency
#3. 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.
33.Record the multiple response rejection in Table 4-9 on page 144 as Multiple Response
Rejection #3.
34.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: 27.178520 GHz (n
′
= 10
−
)
for an 11974Q: 35.172567 GHz (n
′
= 12
−
)
for an 11974U: 42.255900 GHz (n
′
= 12
−
)
for an 11974V: 55.290125 GHz (n
′
= 16
−
)
35.Record the above frequency in Table 4-9 on page 144 as Multiple Response Frequency
#4. 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.