Agilent Technologies HP 8642A/B Specifiche Pagina 232

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Frequency offsets > 100 kHz
The HP 3048A System supports a number of RF Spectrum Analyzers
for measuring frequency offsets greater than 100 kHz. The minimum fre-
quency resolution of any RF analyzer is determined from the frequency
span selected to make the measurement. Systems with an RF analyzer can-
not integrate less than their frequency resolution, or the interval between
two consecutive data points within the frequency span. RF analyzers typ-
ically have approximately 1000 data points per span. (Table 4-1. shows
the intervals per frequency span for several RF analyzers supported by the
HP 3048A.) The minimum range of integration is greater than or equal
to the selected frequency span divided by the total number of data points
(1000) within the span. The frequency span and resolution is defined in
the RF Segment Table.
Min.
Range of Integration
RF Analyzer Frequency Span
Intervals Per Frequency Span
For example: The HP 3585A RF analyzer uses 1000 data points for
each frequency span. A span setting of 500 kHz will provide 500 Hz of
resolution between data points. Therefore, the minimum frequency range
you can specify to integrate is 500 Hz for a 500 kHz setting.
Table 4-1. Table of Data Points for Supported Analyzers
Model
HP 3561A
HP 3585A
HP 8562
HP 8566A/B
HP 8568A/B
HP 71000
Data Points Per
Frequency Span
401
1001
601
1001
1001
801
Intervals Per
Frequency Span
400
1000
600
1000
1000
800
Minimum Range
of Integration
Freq.
Span -r 400
Freq.
Span ~- 1000
Freq.
Span -r 600
Freq.
Span ~~ 1000
Freq.
Span -j- 1000
Freq.
Span -=- 800
4-6 fnteqr Noise
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