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Command Reference 9-49
:INPut :LEVel :AUTOPM6680B PM6681
8 «<Boolean>|ONCE»
Autotrigger
If set to AUTO, the counter automatically controls both the trigger level and the at
-
tenuation
1
. If you have a stable amplitude, use the :AUTO 8 ONCE, and the
autotrigger will determine the trigger level once and then set a fixed level.
+
From the bus, input A and input B are always set to autotrigger individually.
Parameters:
<Boolean> = ( 1/ON | 0/OFF )
ONCE means that the autotrigger switches on, checks the signal, stores the trigger
levels as manually set levels, and then switches off auto. This improves measuring
speed.
Example for Input A (1)
SEND® :INP:LEV:AUTO 8 OFF
Example for Input B (2)
SEND® :INP2:LEV:AUTO 8 ON
Returned format: 1|0¿
*RST condition ON
1
The autotrigger function normally sets the trigger levels to 50 % of the signal ampli-
tude. Two exceptions exists however:
Rise/Fall time measurements: Here the input 1 (A) trigger level is set to 10% and
the Input 2 (B) trigger level is set to 90% of the amplitude.
Variable Hysteresis mode (channel 7): The input 1 (A) trigger level is set to 75%
and the Input 2 (B) trigger level is set to 25% of the amplitude