Fluke PM6681R, PM6685R manual INPut«124» SLOPe, INPut2COMMon, Trigger Slope

PM6680B/81/85

Trigger Slope

:INPut«[1]24» :SLOPe

￿ «POSNEG»

Selects if the counter should trigger on a positive or a negative transition. Selecting negative slope is useful when measuring negative pulse width and negative duty cycle.

When you select negative slope, the counter always uses the non-prescaled mode, limiting the maximum input frequency to 160 MHz. This can be useful when you want to make fast frequency measurements: Using positive slope, the counter needs two input cycles to make a SINGLE frequency measurement, but when set to negative slope, only one input cycle is required.

Returned format: POS NEG ￿

Example for Input A (1)
SEND￿ :INP:SLOP	￿	POS
Example for Input B (2)	(Only for PM6680B/81)
SEND￿ :INP2:SLOP	￿	NEG
Example for Input E (4)
SEND￿ :INP4:SLOP	￿	NEG
*RST condition POS
Complies to standards:	SCPI 1991.0, confirmed.

PM6680B PM6681

:INPut2:COMMon

ONOFF

When on, the signal on input A is fed both to Channel 1 and Channel 2. The inter- connection is made before the filter on input A.

Parameters

<Boolean> = ( 1/ON 0/OFF )

ON means that the signal on input A is fed both to Channel 1 and Channel 2. The input signal on input B is not used in the measurement. But the signal on input B is terminated by the input impedance of the counter (50￿ or 1M￿).

OFF means that inputs A and B works separated from each other.

Returned format: 10￿

Example:

SEND￿ :INP2:COMM ON

This example switches on common, feeding the same signal to both channel 1 and channel 2.

*RST condition OFF

Command Reference 9-51