VXI VT1538A user manual Determining the Input Threshold Level, returns threshold value

Determining the Input Threshold Level

Note

•Channels in <ch_list> must be input configured channels

To determine a channel’s input threshold level, use the command: INPut:THReshold:LEVel? (@<channel>)

Because the E1538 rounds <level> to the nearest multiple of 0.375, the returned value can be different from the value sent.

•<channel> must specify a single input-configured channel.

•INP:THR:LEV? returns a numeric value between -46 and +46. The C-SCPI type is int32.

To query the threshold level on the second channel at SCP position 4 send:

INP:THR:LEV? (@133)	query 2nd chan on SCP pos. 4
enter statement here	returns threshold value

Set Input Logic Sense Use INPut:POLarity NORMal INVerted,(@<ch_list>) to configure input channel logic sense. The operation is as follows:

INP:POL	NORM	input voltage greater than the threshold level sends a
		value of 1	(one) to the algorithm channel specifier.
INP:POL	INV	input voltage greater than the threshold level sends a
		value of 0	(zero) to the algorithm channel specifier.

To configure channels 40 to 43 to sense low input as logic 1

INP:POL INV,(@140:143)

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 13