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Command Reference 9-51
:INPut«[1]|2|4» :SLOPePM6680B/81/85
8 «POS|NEG»
Trigger Slope
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 8 POS
Example for Input B (2) (Only for PM6680B/81)
SEND® :INP2:SLOP 8 NEG
Example for Input E (4)
SEND® :INP4:SLOP 8 NEG
*RST condition POS
Complies to standards: SCPI 1991.0, confirmed.
:INPut2:COMMonPM6680B PM6681
ON|OFF
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 (50W or 1MW).
OFF means that inputs A and B works separated from each other.
Returned format: 1|0¿
Example:
SEND® :INP2:COMM ON
This example switches on common, feeding the same signal to both channel 1 and
channel 2.
*RST condition OFF