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7-4
Calibration Commands
CANCel
CAUTION The input circuits can be damaged by electrostatic discharge (ESD). Avoid applying static discharges to the front-
panel input connectors. Momentarily short the center and outer conductors of coaxial cables prior to connecting
them to the front-panel inputs. Before touching the front-panel input connectors be sure to first touch the frame
of the instrument. Be sure the instrument is properly earth-grounded to prevent buildup of static charge. Wear a
wrist-strap or heel-strap.
CANCel
Command :CALibrate:CANCel
Cancels a calibration when a calibration message box prompt is displayed.
Example 10 OUTPUT 707;":CALIBRATE:CANCEL"
CONTinue
Command :CALibrate:CONTinue
Continues a calibration when a calibration message box prompt is displayed.
Example 10 OUTPUT 707;":CALIBRATE:CONTINUE"
ERATio:DLEVel?
Query :CALibrate:ERATio:DLEVel? CHANnel<N>
This query returns the dark level value for the specified channel. If an extinction ratio calibra-
tion has been performed the returned value is the calibration result. If no calibration has been
performed the default value of 0.0 is returned. <N> is an integer, from 1 to 4.
Returned Format [:CALibrate:ERATio:DLEVel] <value><NL>
ERATio:STARt
Command :CALibrate:ERATio:STARt CHANnel<N>
This command starts an extinction ratio calibration. Before performing an extinction ratio
calibration, display an eye diagram and adjust the vertical scale and offset so that the eye dia-
gram uses the full display. Also, the dark level (the signal level when there is no input to the
measurement) must be on the screen to be correctly measured. To continue the calibration
after disconnecting the input signal, send the :CALibrate:CONTinue command. <N> is an
integer, from 1 to 4.
ERATio:STATus?
Query :CALibrate:ERATio:STATus? CHANnel<N>
This query indicates whether the ratio being used is the result of an extinction ratio calibra-
tion or is the factory default value. The query returns CALIBRATED or DEFAULTED. <N>
is an integer, from 1 to 4.
Returned Format [:CALibrate:ERATio:STATus] {CALIBRATED | DEFAULTED}<NL>