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9-30 Command Reference
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:DIAGnostic:CALibration:INPut[1|2]:HYSTeresis 81
8 «OFF | ONCE»
Input comparator hysteresis calibration
These two commands measure and save the hysteresis levels of the input com
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parator. This makes it possible to achieve a trig level accuracy of 2.5 mV, which is
important in measurement functions such as phase, to get the best possible re
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sults.
+
Since the calibration compensates for the temperature drift of the input ampli
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fier, it should be made at the same temperature as the accurate measurement
is to be made at.
Before sending these commands, be sure to disconnect any signal leads from the
input connector of the input you want to calibrate.
If error code 1191 is generated, the calibration constants are out of range and you
must calibrate again. Check that no cables are connected to input A or input B be
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fore recalibrating.
When the input calibration procedure can be done without error codes, the calibra
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tion is correct.
Example:
SEND® :DIAG:CAL:INP:HYST 8 ONCE
This string calibrates both input A and input B.
Returned format:
OFF ¿
When queried, these commands always return OFF .
*RST condition: *RST does not affect these calibration data.