GPIB Operation HP438A Emulation Commands
ML2437A/38A OM/PM PN: 10585-00001 Rev. P 8-131
TR0 (Trigger hold mode)
TR1 (Trigger immediate)
TR2 (Trigger with a settling delay)
TR3 (Trigger free run)
ZE (Zero sensors)
Syntax: TR0
Remarks: Sets both channels to trigger hold mode. It does not trigger until it
receives a TR1 or TR2 or GET (group executive trigger), *TRG or TR3
command. If it receives a TR3 command it reverts back to the trigger
mode it was in before the TR0 command was sent. If the REM line is
low, this command has no effect.
Related
commands:
TR1, TR2, TR3, *TRG, Group Execute Trigger (GET), GT0, GT1, GT2
Syntax: TR1
Remarks: Triggers a single reading which is added to the internal digital filter and
the updated filter power level is returned on the GPIB. After a TR1
command, the instrument returns to TR0 standby mode.
Related
commands:
TR0, TR2, TR3, *TRG, Group Execute Trigger (GET), GT0, GT1, GT2
Syntax: TR2
Remarks: Triggers a new series of readings; enough to update the internal digital
filter for a noise free reading at the current power level. The value is
then returned on the GPIB and returns to TR0 standby mode.
Related
commands:
TR0, TR1, TR3, *TRG, Group Execute Trigger (GET), GT0, GT1, GT2
Syntax: TR3
Remarks: Sets the ML243xA back into free run mode on both channels.
Related
commands:
TR0, TR1, TR2, *TRG, Group Execute Trigger (GET), GT0, GT1, GT2
Syntax: ZE
Remarks: Zero all connected sensors. The ML2430, when emulating the HP438,
may take longer to Zero a sensor than the HP438 itself. When
performing a zero the status byte should be used to identify when
ZEROing is complete.
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