Program Timing - Agilent Technologies 8560E User Manual

Programming

Program Timing

Program Timing
Most remotely controlled measurements require control of the sweep.
The TS (take sweep) command initiates a sweep when the trigger
conditions are met. When TS is executed as part of a command
sequence, the analyzer starts and completes one full sweep before the
next analyzer command is executed.
Use the SNGLS (single sweep) command to maintain absolute control
over the sweep and to reduce execution time. Once SNGLS activates
the single-sweep mode, TS can be used to initiate a sweep only when
necessary.
If a TS command is executed, but the trigger conditions are not met, the
NOTE
spectrum analyzer will not respond on GPIB. The analyzer continues to
take commands into its input buffer, however the commands are not
processed at this time. This can also appear to happen if the sweep time
is very long. If this occurs, the HP BASIC CLEAR (that is, CLEAR 718)
statement can be used to abort the TS command. (CLEAR also causes
an instrument preset.)
Because many remote commands process trace information, updating
trace information with TS becomes important whenever the input
signal or analyzer settings change. Use TS to update the trace after the
analyzer settings or input signals change, but before the trace
information is returned to the computer or processed by other
commands, like trace math or marker commands.
When developing measurement algorithms with the front-panel
controls, use the single-sweep function to simulate the effect of the TS
command updating the trace. Pressing either or
SGL SWP SWEEP CONT
(so that SGL is underlined), and waiting until the end of the sweep,
SGL
is the same as executing TS via remote control during the single-sweep
mode.
The following examples demonstrate the importance of updating trace
information with the TS command.
E : Change the measurement range but do not update trace
XAMPLE
information.
298 Chapter 5