Operating and Programming 3
L4400 User’s Guide 77
• You can specify a sweep count in conjunction with a trigger count and
a sample count. The three parameters operate independent of one
another, and the total number of readings returned will be the
product of the three parameters.
• You can store at least 500,000 readings in memory and all readings
are automatically time stamped. If memory overflows, the new
readings will overwrite the first (oldest) readings stored; the most
recent readings are always preserved.
• The CONFigure and MEASure? commands automatically set the sweep
count to 1 sweep.
• The instrument sets the sweep count to 1 after a Factory Reset
(*RST command). An Instrument Preset (SYSTem:PRESet command) or
Card Reset (
SYSTem:CPON command) does not change the setting.
The following command sets the sweep count:
SWEep:COUNt
Channel Delay
Usage:
• L4421A 40- Channel Armature Multiplexer
You can control the pacing of a scan sweep by inserting a delay between
the L4421A channels in the scan list (useful for high- impedance or
high- capacitance circuits). The delay occurs following relay closure and
any inherent settling time, and before the generation of the “channel
closed” signal that would externally trigger a separate DMM (see
“Scanning with External Instruments”).
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