sweep time
The time it takes the local oscillator to tune across the selected span. Sweep time directly affects how long it takes to complete a measurement. It does not include the dead time between the completion of one sweep and the start of the next. It is usually a function of frequency span, resolution bandwidth, and video bandwidth. Resolution affects sweep time in that the IF filters are
Time in Passband = | resolution bandwidth |
| (r e s o1 ut’aonb adn wz‘dth | x sweep time) |
(span /sweep time) = | span |
| ||
|
|
k
Rise Time =
resolution bandwidth
Solving for sweep time:
k x span
sweep time =
resolution bandwidth2
A time gate acts as a time lilter, rejecting signals and spectra not corresponding to the desired time. It is an RF signal switch that admits the signal to the analyzer only while the switch, or gate, is closed. Since the analyzer receives the signal only when passed through the gate, it will only display the measurement results from the portion of the signal selected by the gate position in time.
title line
The area on a display where