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:
•Change the resolution bandwidth. The displayed amplitude should change.
•Change the sweep time. The spacing of the responses on the display should change as you change the sweep time.
•Change the span. The spacing of the responses should not change. They should be independent of frequency span.
•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.