Agilent Technologies HP 70910A Betriebsanweisung PDF herunterladen (Seite 133)

Chapter 4 133

Performance Tests

5. 3 dB Bandwidth

Performance Tests

22.Calculate the 3 dB bandwidth at this frequency using the following equation:

where n represents the harmonic number listed below:

11974A: 8

11974Q: 10

11974U: 10

11974V: 14

NOTE The above equation applies only when the spectrum analyzer is an 8566B.

When using an 8563A or 71000C spectrum analyzer, use the following

equation:

23.Set the synthesized sweeper for a CW signal at the frequency listed below:

for an 11974A: 33.25 GHz

for an 11974Q: 41.5 GHz

for an 11974U: 50 GHz

for an 11974V: 62.5 GHz

24.Set the center frequency of the spectrum analyzer by pressing

CENTER FREQUENCY,

then entering the corresponding value for the band listed below:

for an 11974A: 33.25 GHz

for an 11974Q: 41.5 GHz

for an 11974U: 50 GHz

for an 11974V: 62.5 GHz

25.Repeat step 15 through step 22 for this center frequency and record the results in

Table 4-11 on page 146.

26.Set the synthesized sweeper for a CW signal at the frequency listed below:

for an 11974A: 40 GHz

for an 11974Q: 50 GHz

for an 11974U: 60 GHz

for an 11974V: 75 GHz

High DAC number Low DAC number–1–

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46 n×× MHz()

High DAC number Low DAC number– 1–

255

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65 n×× MHz()

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Agilent Technologies HP 70910A Betriebsanweisung Seite 133