11
IM 701450-61E
6.
Press the
Deskew
soft key to select ON.
7.
Press the
Target CH
soft key. The Target CH menu appears.
8.
Press one of the
CH1
to
CH6/4
soft keys to select the displayed channel to be
corrected.
•
CH1 to CH4 and CH1 to CH6 are channels on which power analysis is performed on
the DL7440 and DL7480, respectively.
•
Select a channel that is not set to be the trigger source* of edge trigger for the
correction target channel. When deskewing the voltage and current signals applied to
CH1 and CH2 and CH1 is set to be the trigger source, select CH2 to be corrected.
When deskew is executed, the CH2 signal approaches the CH1 signal on the time axis,
and the difference in the transfer time is corrected. Likewise, execute deskew on the
CH3 and CH4 pair and CH5 and CH6 pair.
*
For a description of the edge trigger and trigger source, see section 6.5 in the
DL7440/
DL7480 User’s Manual
.
Turn ON Deskew
Select Target CH
Executing Auto Deskew
9.
Press the
Auto Deskew Execute
soft key. Deskew is automatically executed.
Executing Manual Deskew
•
You can also manually execute deskew. You can use manual skew to correct the difference
further after executing auto deskew.
•
For a description of the settings related to the vertical axis or horizontal axis (time axis) used
when displaying the signals applied to each channel, see the procedural explanations in the
respective sections in the
DL7440/DL7480 User’s Manual
and set the display for easy
viewing of the correction condition.
9.
Turn the
jog shuttle
and set Deskew Time so that the offset in the displayed
voltage and current waveforms is small as possible.
Note
•
To improve the deskew accuracy, it is recommended that the bandwidth limit of the two
channels be set the same (as close to Full as possible) when executing deskew.
•
Execute deskew each time you change the bandwidth setting.
•
Auto deskew may not work properly due to noise effects.
4 Correcting (Deskewing) the Difference in the Transfer Time of Analyzed Signals
This mark appears when the
Deskew setting is ON and the
deskew time of the selected
target CH is set to a value
other than 0.00 ns
