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Deskew
Use the following procedure to compensate for timing differences between voltage probes:
1 Set up the instrument to display all of the channels that you want to deskew.
2 Push the instrument AUTOSET button.
3 Adjust the vertical SCALE and POSITION controls for each channel so that the signals
overlap and are centered on the display.
4 Adjust the horizontal POSITION so that a rising edge is triggered at the center of the
display.
5 Adjust the horizontal SCALE so that the differences in the channel delays are clearly
visible.
6 Adjust the horizontal POSITION again so that the first rising edge is exactly at the center of
the display. The fastest probe is connected to this channel (the fastest probe is usually the
one with the shortest cable or with the highest bandwidth).
7 Select Deskew from the Vertical menu to open the Deskew control window.
8 Select one of the slower channels.
9 Adjust the deskew time for the slower channel so that its signal aligns with that of the
fastest channel. The deskew adjustment range is ±75 ns.
10 Repeat steps 8 and 9 for each additional channel that you want to deskew.
11 Remove the connections from the probe compensation terminals.
Note
To compensate for timing differences between voltage and current probes, order the Probe
Calibration and Deskew Fixture (067-0405-02). The fixture requires a user-supplied pulse
generator when used with a TDS5000B Series instrument.
Signal Path Compensation
Use this procedure to compensate the internal signal acquisition. You should perform this
procedure if the temperature has changed more than 5° C since the last signal path compensation
was performed.
Note
When making measurements at vertical scale settings less than or equal to 5 mV, you should
perform the signal path compensation at least once a week. Failure to do so may result in the
instrument not meeting warranted performance levels at those volts/div settings.
1 Power on the instrument and warm up for 20 minutes before continuing with this procedure.
2 Disconnect any probes that you have connected to the input channels.
3 Set the instrument to Menu mode.
4 Select Instrument Calibration from the Utilities menu.
5 Note any instructions that appear under Calibration Instructions in the resulting control
window.
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