5 Triggering and Gating
168 Keysight 53220A/53230A User’s Guide
Measurement Gate
Control of the measurement gate allows you to select the duration of the
measurement. The gating sequence of the trigger/gate cycle begins after a
system trigger signal is received, and is repeated for each measurement specified
in the sample count.
Gate set up
The counter’s gate source determines the path through the gate cycle and the
related parameters that must be considered. A gate source is required for all
frequency, totalizing, and time interval measurements.
Although selection of the gate source is shown at the beginning of the cycle
(Figure 5-2 and Figure 5-5), programmatically it should occur after all other gate
parameters have been set. This prevents potential “settings conflict” errors
between the SENSe subsystem commands, and is illustrated in the examples and
program segments that use these commands.
The gate sequence occurs while the counter is in the triggered state
(Figure 5-2). Although shown in the figure after the counter is initiated, gate
configuration like system trigger configuration, occurs while counter is in the
idle state.
Counter measurements are based on configurations comprised of multiple
parameters. The easiest and most common starting point for setting these
parameters programmatically is using commands within the CONFigure and
MEASure subsystems (Chapter 3). These subsystem commands are considered
“high-level”, as multiple counter parameters are set or defaulted from a single
command. “Low- level” commands such as the gating commands described
here allow you to change selected gating parameters without altering other
areas of the counter configuration.
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