Agilent Technologies 8935 Series, Руководство пользователя

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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.