Keysight Technologies N9340B, Руководство пользователя

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Key Reference
BW/SWP
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.