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120 Chapter 4

Performance Tests

3. Multiple Response Rejection Test

Performance Tests

11.Set the spectrum analyzer to the appropriate millimeter band by using the following

key sequence:

for an 11974A:

SHIFT ⇑ ⇑

for an 11974Q: SHIFT ⇑ ⇑ ⇑

for an 11974U: SHIFT ⇑ ⇑ ⇑ ⇑

for an 11974V: SHIFT ⇑ ⇑ ⇑ ⇑ ⇑

12.Set the spectrum analyzer controls as follows:

SHIFT, 5, MHz, 0, and dB (sets external mixer conversion loss to 0 dB)

FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 kHz

ENTER dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB

13.Set the spectrum analyzer reference level by pressing

REFERENCE LEVEL and entering

the corresponding value for the band listed below:

for an 11974A:

−40 dBm

for an 11974Q:

−40 dBm

for an 11974U:

−40 dBm

for an 11974V:

−55 dBm

14.Set the spectrum analyzer center frequency by pressing

CENTER FREQUENCY and

entering the corresponding 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

15.On the spectrum analyzer, press the following keys:

MARKER

NORMAL

PEAK SEARCH

PRESEL PEAK

16.When the preselector-peak routine is complete, press PEAK SEARCH.

17.Record the marker frequency in Table 4-9 on page 144 as Signal Frequency #1.

18.On the spectrum analyzer, press MARKER

∆.

1 2 ... 115 116 117 118 119 120 121 122 123 124 125 ... 153 154

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Agilent Technologies HP 70910A Guía de usuario Pagina 120