HP E1429A manual TRIGgerSTARtTIMer1

TRIGger[:STARt]:TIMer[1]

Comments ∙ Executable when initiated: No

∙Coupled Command: This command is coupled to the TRIGger:STARt:TIMer2 command and TRIGger:STARt:SOURce command as noted below:

Unless TRIGger:STARt:SOURce is DTIMer, the settings of TRIGger:STARt:TIMer1 and TRIGger:STARt:TIMer2 are not coupled, and changing one will not affect the setting of the other.

If TRIGger:STARt:SOURce is DTIM, then both TRIGger:STARt:TIMer1 and TRIGger:STARt:TIMer2 are used, and there is a coupling between the two settings. The relationship between the two settings is such that one of these two values must be exactly one reference oscillator period and the other must be a multiple (greater than 1.0) of the reference oscillator period. A record is kept of which setting was changed the most recently, and that setting (TRIGger:STARt:TIMer1 or TRIGger:STARt:TIMer2) is assumed to be the desired setting. For example, consider a reference oscillator period of 1μs; if TRIGger:STARt:TIMer2 was last changed to a value of 1μs while TRIGger:STARt:SOUR was set to DTIM, and the TRIGger:STARt:TIMer1 setting was also 1μs, TRIGger:STARt:TIMer1 would be changed to 2μs (the multiple 2.0 was chosen arbitrarily) so that both settings are not 1.0 times the reference period. Similarly, if TRIGger:STARt:TIMer2 were set to 4μs, and TRIGger:STARt:TIMer1 was some value greater than 1μs (like 2μs), TRIGger:STARt:TIMer1 would be automatically changed to1μs so that one of the two values is 1.0 times the reference period.

∙If dual rate sampling is enabled (TRIGger:STARt:SOUR is DTIM), then the sample period specified by TIMer1 will be the sample rate for the pre-arm readings of the dual rate measurement, and TRIGger:STARt:TIMer2 will be the post-arm sample rate.

∙If TRIGger:STARt:SOUR is TIMer, then only the sample rate specified by TIMer1 is used.

∙Note that it is only necessary to set the longest sample rate if TRIGger:STARt:SOURce is DTIM. The other setting will be automatically forced to be one reference oscillator period due to the coupling between the two rates when TRIGger:STARt:SOURce is DTIM.

∙If TRIGger:STARt:SOUR is neither TIMer or DTIM, then the sample rates specified by TRIGger:STARt:TIMer1 and TRIGger:STARt:TIMer2 are retained, but are not used nor coupled to each other.

∙If the HP E1429 can not sample within 1 percent of the period specified by TRIGger:STARt:TIMer1, then the TIME bit (bit 2) in the QUEStionable Status register is set.

TRIGger Subsystem Command Reference 279