Agilent Technologies 8935 Series Especificações descarregar pdf (Página 221)

220 Chapter 8

Performance Tests

Spectrum Analyzer Image Rejection Performance Test 24

d. Select the CDMA GENERATOR screen.

e. Set the CW RF Path field to Bypass.

f. Select the SPEC ANL screen.

g. Set the RF In/Ant field to Ant.

h. Set the Ref Level field to -25 dBm.

i. Set the Span field to 5 kHz.

j. Set the Controls field to Marker.

k. Set the Marker To field to Center Freq.

l. Set the Controls field back to Main.

3. Set the signal generator’s frequency and the Test Set’s spectrum

analyzer center frequency as shown in the Performance Test Record

(PTR) and read the image response on the spectrum analyzer. The

image response is the spectrum analyzer’s marker level (in dBm)

minus the signal generator’s output level (minus

−20 dBm). (In other

words, add 20 dB to the marker level.) Compare the results to the

limits.

Procedure 2

1. Disconnect the signal generator from the Test Set.

2. On the Test Set:

a. Set the Controls field to Auxiliary.

b. Set the Input Atten field to Hold at 0 dB.

c. Set the Controls field back to Marker.

d. Set the Marker To field to Center Freq.

e. Set the Controls field to Main.

f. Set the Span field to 10 MHz.

g. Set the Ref Level field to -20 dBm.

3. Set the Test Set’s Center Freq field to the frequencies shown in the

PTR and measure the residual response on the spectrum analyzer’s

marker field and compare it to the limits.

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Agilent Technologies 8935 Series Especificações Página 221