Command Groups
TDR Command Gr
oup
You use the commands in the TDR Command Group to do the following:
Specify TDR step channels (C1 through C8), and select the polarity for e ach.
Select TDR steps.
Enable and disable acquisition.
Set the TDR
internal clock rate.
Preset any TDR channel.
Set the channel TDR deskew.
Select the channel TDR units.
Obtain all the TDR parameters.
Preset TDR channel pairs for differential TDR measurements.
Positi
on the TDR Incident Edge.
Command
Description
AUTOSet:TDR:INCident Sets or returns the Incident edge option for
the TD
R autoset (on or off)
TDR?
Returns all TDR parameters
TDR:
CH<x>:DIFfpres e t
Sets
the instrument to prede fined differential
TDR settings for the specified TDR channel
pair
TDR:CH<x>:PRESET Sets the instrument to predefined TDR
set
tings for the specified TDR channel
TD
R:CH<x>:STEP:DES kew
Se
ts or returns the specified channel TDR
deskew (if valid type head in channel)
TDR:CH<x>:STEP:POLarity Sets or returns the TDR step polarity for the
specified channel
TDR:CH<x>:STEP:STATE Sets or returns whether the TDR generator
i
s on or off for the specified channel
TDR:CH<x > :UNIts Sets or returns the TDR units for the specified
channel
TDR:INTRate
Sets or returns the TDR (Internal Clock) rate;
same as TRIG:INT RATE
2-36 DSA/CSA/TDS8X00/B Series Programmer Manual
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