53220A/53230A Measurements 3
Keysight 53220A/53230A User’s Guide 83
Setting the Measurement Mode
There are three measurement modes available for making frequency, frequency
ratio, and average period measurements. The measurement mode is set using the
command:
[SENSe:]FREQuency:MODE {AUTO|RECiprocal|CONTinuous}
[SENSe:]FREQuency:MODE? (query form)
AUTO - configures the counter to make resolution-enhanced measurements when
possible, or reciprocal measurements otherwise depending on input signal
conditions. Channel 3 wide mode burst frequency measurements (PRF/PRI) are
made using resolution-enhanced (AUTO) mode only.
RECiprocal - configures the counter for reciprocal-only measurements. In
Reciprocal mode, the period of the input signal is measured and all frequency
readings are derived from (are the reciprocal of) the period measurement.
RECiprocal mode is not available on optional channel 3.
CONTinuous - configures the counter for continuous, resolution-enhanced,
gap-free measurements. These measurements are used by the counter's Allan
Deviation feature when estimating stability.
In CONTinuous mode a trigger count of ‘1’ is the only value allowed, and all
samples (readings) per trigger are taken within a single (hardware) gate open/
gate close sequence and computed back-to-back. There is no lag (dead time)
between readings that otherwise occurs with the per-sample gate open/gate
close sequence of the AUTO and RECiprocal modes.
To Next Page
Loading...
