8508A
Users Manual
Execute Trigger
This command conforms to the IEEE 488.2 standard requirements.
TRG
∗
adj245f.eps
Execute Trigger
*TRG
Equivalent to a Group Execute Trigger (GET). Causes a single reading to be taken.
Execute Trigger and Take a Reading
X?
adj246f.eps
Execute Trigger and Take Reading
X?
Equivalent to performing an Execute Trigger (*TRG;RDG?) followed by a reading query.
X? is intended for high speed use.
Settling Delay
DELAY
Nrf
DFLT
phs
adj247f.eps
Setting Delay
Nrf
A numeric value for the required settle delay. The minimum period allowed is 0, and the
maximum is 65,000 seconds.
Examples:
DELAY 0.001 sets a settle delay after trigger of 1ms before the reading begins
DELAY DFLT sets the default delay for the selected function, range, filter etc.
The programmed delay is active with TRG_SRCE EXT selected, although delays may be
programmed whilst unit is in Remote with default (internal) triggers selected. They will
then become active upon the selection of the external trigger.
Delay Selection Resolution
<0.01 s 10 µs
0.01 s to 0.1 s 100 µs
0.1 s to 1 s 1 ms
1 s to 10 s 10 ms
>10 s 100 ms
Execution Errors:
Execution errors are generated if an attempt is made to program the delays when the
instrument is not in remote control.
An execution error is generated if the selected value of Nrf exceeds the limiting value.
Power On and Reset Conditions
DFLT
4-34
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