Chapter 4 — Spectrum Analyzer 4-30 Span
MS20xxA VNA Master UG 10580-00166 Rev. C 4-53
Full Span
Pressing this button sets the span to cover the entire tunable spectrum of the
instrument.
Zero Span
This soft key sets zero span. In this mode the display shows amplitude changes at a
single frequency. This function is frequently used to allow the easy monitoring of power
variations over time. For example, if information about the amplitude of an 802.11a
access point signal is needed, the access point frequency would be set as the center
frequency, resolution bandwidth would be set to a value wide enough to encompass the
signal and the tester would walk around the access point usable area while the VNA
Master records the amplitude using slow sweep.
Last Span
This soft key returns the span to the most recent span value immediately before a
change was made.
10580-00166C.book Page 53 Thursday, February 21, 2008 12:52 PM
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