Agilent Technologies HP 70910A Podręcznik Użytkownika Pobierz pdf (Strona 116)

116 Chapter 4

Performance Tests

2. Image Rejection Test

Performance Tests

14.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

15.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

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

MARKER

NORMAL

PEAK SEARCH

PRESEL PEAK

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

18.Record the marker frequency in Table 4-8 on page 143.

19.On the spectrum analyzer, press MARKER

∆.

20.On the spectrum analyzer, press

CENTER FREQUENCY and use the ⇑ key to tune to the

image response. Press

PEAK SEARCH to place the delta marker at the top of the image

response. The absolute value of the delta marker amplitude is the Image Rejection.

NOTE If the signal is buried in the noise floor, reduce the video bandwidth to 100 Hz

to help identify the signal. At some frequencies, however, instrument

performance is so good that an image response may not be visible.

21.Record the Image Rejection in Table 4-8 on page 143.

22.On the synthesized sweeper, press

CW and ⇑ to increase the frequency of the

synthesized sweeper 500 MHz higher.

23.On the spectrum analyzer, set the

CENTER FREQUENCY to match the output frequency

of the signal source.

1 2 ... 111 112 113 114 115 116 117 118 119 120 121 ... 153 154

Komentarze do niniejszej Instrukcji

Brak uwag

Agilent Technologies HP 70910A Podręcznik Użytkownika Strona 116

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Pomiary, testowanie i kontrola Agilent Technologies HP 70910A