Agilent Technologies HP 8642A/B Spécifications Page 282

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Bandwidth
The Bandwidth is automatically set by the HP 3048A to the appropriate
value for each Measurement Range. The bandwidths defined in the
RF Segment Table should not exceed those specified in the default
RF Segment Table, but the bandwidths can be of finer resolution if desired.
Bandwidths should typically be 1 kHz, 3 kHz, 10 kHz, 30 kHz, etc. These
bandwidths are available on all supported RF analyzers. However, if your
particular RF analyzer supports other bandwidths, they can be used. (Refer
to your RF Spectrum Analyzer's Operating and Service manual for a list
of the available bandwidths.)
NOTE
A Bandwidth greater than 3 kHz should not be used in a
segment including 100 kHz.
Video Bandwidth
For accurate noise measurements, the video bandwidth entry should be
defined using the following equation. Note that a smaller video bandwidth
provides more smoothing of the noise but requires increased sweep time
to maintain full accuracy on spurs.
T7
.
n
_ . ... Resolution Bandwidth
Video Bandwidth =
300
5-26 RF Segmnts
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