User`s guide

53220A/53230A User’s Guide 71
53220A/53230A Measurements 3
Note that disabling standby power with Battery Option 300 installed and the
line voltage removed will extend the time the battery remains charged.
Standby power is disabled (Off) when the counter is shipped from the factory
or following the SYSTem:SECure:IMMediate command. The current setting
is stored in non-volatile memory and is not changed after a reset (*RST) or
instrument preset (SYSTem:PREset or Preset key).
Setting the Measurement Mode
There are three measurement modes available for making frequency, fre-
quency 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 sig-
nal 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.