User`s guide

Key Reference 5
N9340B User’s Guide 91
Fast sweep mode provides a fast measurement
function that decreases the sweep time. Using Fast
Sweep will decrease the measurement accuracy.
TD Mode
Key access: [BW/SWP] > {Sweep} > {Sweep Mode}
The TD mode is used to analyze TDD or TDM
signal, for instance the GSM signal frame. When in
this mode, the sweep frequency analysis is enabled
at RBW of 1 kHz, 3 kHz and 10 kHz. When TD
mode is set to Off, the analyzer is sweeping in FFT
analysis mode below 30 kHz. In TD mode, you can
manually set the sweep time long enough to get a
stable measurement result of TDD signal. For
example, one time frame for GSM signal is
4.616ms, then the sweep time can be set no less
than 4.616ms*461 (points of one trace of N9340B)
to measure the signal.
Single Sweep
Key access: [BW/SWP] > {Sweep} > {Single Sweep}
When the analyzer is in continuous sweep mode
and not in a measurement mode ([MEAS] > Measure
Off), pressing [BW/SWP] > {Single Sweep} will change
the sweep setting to single sweep. It will then
begin a sweep after the trigger conditions are met.
If the analyzer is already in single sweep, pressing
[BW/SWP] > {Single Sweep} will execute a new
sweep as soon as the trigger condition is met.
If average is on ([TRACE] > {More} > {Average On}),
pressing [BW/SWP] > {Single Sweep} will halt
averaging of the current value, and then continue
averaging from the current count number when a
single sweep function triggers.
NOTE
Fast sweep is valid only when span is no less than 50 MHz.
Measurement data is not ganruanteed in fast sweep mode.