Specifications

5-26
System Command Reference Section
Error Detector DATA IN
Error Detector DATA IN
The SENSE1:PATT:VOLT, SENSE1:EYE and INPUT1 commands control the
configuration of or indicate the status of the error detector's DATA IN port. The
SENSE1:EYE commands control the automatic data/clock delay and automatic zero-one-
threshold setting.
SENSe[1]:VOLTage:ZOTHreshold <numeric value>
This node allows the level at which the error detector discriminates between a zero and a
one to be configured.
A numeric value parameter sets the level to a given value. It also sets
:ZOTHreshold:AUTO OFF.
When in :ZOTHreshold:AUTO OFF, the query form of the :ZOTHreshold
command returns the last user-entered value. When in :ZOTHreshold:AUTO ON,the
query form returns the value automatically determined by the hardware.
If input termination and zero-to-one level are to be set up, then the input termination
should be set up first.
The *RST selection is −1.3 V.
SENSe[1]:VOLTage:ZOTHreshold:AUTO <boolean>
This command enables an automatic mode in which the zero-to-one threshold level is set
to the mean of the input signal.
The query form of this command returns the current setting of the hardware discrimination
circuit.
The *RST selection is ON.
SENSe[1]:EYE:TCENter ONCE|<boolean>
:TCENter ONCE
:TCENtre ONCE
:TCENter ON
:TCENtre ON
Any of the above commands initiates a search for the value of data/clock delay that puts
the active clock edge in the center of the data eye, midway between the two relative delay
points with a measured BER just in excess of the BER configured by the
EYE:THReshold command. If successful, the command leaves the data/clock delay at