User`s guide

53220A/53230A User’s Guide 79
53220A/53230A Measurements 3
Using MEASure
Measurements using commands from the MEASure subsystem are made as the
command is executed, and are based on parameters specified within the syn-
tax. The results are sent to the instrument’s output buffer.
For example, the MEASure command:
MEAS:FREQ? 60.0, 1e-3, (@1)
takes a single measurement with five digit (1 mHz) resolution of an expected
60 Hz signal on channel 1. All other counter parameters (input configuration,
trigger sources, etc.), are set to values predefined for the given MEASure com-
mand, or remain unchanged from previously programmed values.
Because the measurement is taken immediately, changes to the counter config-
uration are limited to the parameters within the command.
Using CONFigure
Measurements using commands from the CONFigure subsystem allow the use
of low-level commands to change counter parameters before the measurement
is taken. For example, assume the following configuration is required:
• frequency measurement
• external trigger - positive slope
• trigger count = 2
• sample count (readings per trigger) = 5
• gate time = 5 ms
The MEASure:FREQuency? command cannot be used since it immediately
triggers a measurement after setting the trigger source to ‘internal’, the trigger
count to ‘1’, and the sample count to ‘1’. The gate time is set to 0.1 seconds.