Agilent Technologies 11974 Series, User Manual

Page: 112 / 156

Chapter 4 111
Performance Tests
1. Conversion Loss
P
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orm
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15.Set the spectrum analyzer controls as follows:
SHIFT
,
5
,
MHz
,
0
, and
dB
(sets external mixer conversion loss to 0 dB)
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MHz
ENTER dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 dB
CF STEP SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 MHz
16.Set the reference level of the spectrum analyzer by pressing
REFERENCE LEVEL
and
entering the corresponding value for the appropriate band listed below:
for an 11974A:
−
40 dBm
for an 11974Q:
−
40 dBm
for an 11974U:
−
40 dBm
for an 11974V:
−
55 dBm
17.Set the center frequency of the spectrum analyzer by pressing
CENTER FREQUENCY
and
entering the corresponding value for the appropriate band listed below:
for an 11974A: 26.5 GHz
for an 11974Q: 33 GHz
for an 11974U: 40 GHz
for an 11974V: 50 GHz
18.On the spectrum analyzer, press MARKER
PEAK SEARCH
and
PRESEL PEAK
.
19.Record the following values in Table 4-7 on page 140.
Marker Frequency
Marker Amplitude
Power Meter Reading
Cal Factor % or Correction Factor (dB)
Directional Coupler Coupling Factor
NOTE For the purpose of this measurement, the directional coupler coupling factor
is defined as the ratio of the power at the output flange to the power at the
coupled flange.