
10.
Frequency
Response
‘Ikst
Related
Adjustments
Specifications
Description
Frequency Response Adjustments
(Includes input attenuator flatness in the 10
dB
setting and mixing
mode gain variations, and assumes PRESELECTOR PEAK in current
instrument state.)
I
Flatness (20 to 30°C)
Tuned Frequency
100 Hz to 2.5
GHz
non-preselected band
2 to 12.5
GHz
preselected bands
12.5 to 18.6
GHz
preselected band
18.6 to 20
GHz
preselected band
20 to 22
GHz
preselected band
Cumulative
100 Hz to 20
GHz
100 Hz to 22
GHz
Absolute Amplitude Calibration
4~0.6
dB
f1.7
dB
f2.2
dB
f2.2
dB
f3.0
dB
k2.2
dB
4~3.0
dB
f0.6
dB
Frequency response is checked across the full range of the spectrum
analyzer. In the non-preselected range from 100 Hz to 2.5
GHz,
three
signal sources are used to make swept measurements: a function
generator (100 Hz to 100
kHz),
a frequency synthesizer (100
kHz
to 60 MHz), and a synthesized sweeper (60 MHz to 2.5
GHz).
In the
preselected bands from 2
GHz
to 22
GHz,
a synthesized sweeper is
used to check the frequency response. From 100 Hz to 60 MHz, the
source flatness permits a direct display of analyzer response. Above
60 MHz, the externally
levelled
source is first characterized with
a power meter. The power sensor
Cal
Factor % switch is used to
compensate for the frequency response of the power meter.
2-32 Performance Tests
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