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broadband response
A signal whose spectrum is wider than the resolution bandwidth of an
analyzer, and whose repetition frequency is lower than the bandwidth
of the analyzer. Notice that it is a combination of signal and receiver
characteristics that determines when a signal is classified as broadband.
For refining incoming signal responses, select narrower spans and
bandwidths. Refer also to narrowband
response.The
following checks can
help verify whether or not the response is broadband:
l Change the resolution bandwidth. The displayed amplitude should
change.
l Change the sweep time. The spacing of the responses on the display
should change as you change the sweep time.
l Change the span. The spacing of the responses should not change.
They should be independent of frequency span.
l Change the video bandwidth. If the video bandwidth is made narrower
than the resolution bandwidth, the displayed amplitude of the
responses should decrease.
card reader
See memory card.
channel power
A measure of the total mean power contained within a specified
bandwidth. The measured power is the combination of all discrete signals,
modulation, and noise within the bandwidth.
character set
The set of elementary symbols. These normally include both alpha and
numeric codes, plus punctuation or any other symbol which may be read,
stored, or written and used for organization, control, or representation of
data.
Glossary-4
