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9-46 Command Reference
:INPut :HYSTeresis :AUTO PM6685
8 «<Boolean>|ONCE»
Auto Sensitivity
AUTO from the front panel turns on both auto sensitivity (hysteresis) and auto
waveform compensation(trigger level). From the bus there are two commands, one
for auto hysteresis and one for auto trigger level. However, the function of these
commands are identical. Both commands turn on/off the hysteresis and the trigger
level simultaneously.
The auto sensitivity function normally sets the hysteresis to 33% of Vpp. However,
two exceptions exists: Pulse Width and Duty Cycle, where the hysteresis is set to
min.
If you have a stable amplitude, use the :AUTO 8 ONCE, and the autotrigger will de
-
termine sensitivity once and then set fixed levels.
Parameters <Boolean> = ( 1/ON | 0/OFF )
ONCE means that AUTO first switches ON to check the signal. After determining suitable sen
-
sitivity and trigger level setting, it programs these values as if they where manually set.
It ends by switching off AUTO. Using ONCE instead of AUTO ON improves measuring
speed.
Returned format: 1|0¿
Example:
SEND® :INP:HYST:AUTO 8 OFF
This example switches off AUTO, enabling manual sensitivity and trigger level set-
ting.
*RST condition ON