Deskew and Gain Cal Fixture Instructions
18
Deskew Fixture Instructions
It is a possible to perform a Gain Cal using a differential and a single ended
probe at the same time.
1.
Remove the guide posts from the GAIN CAL position.
2.
Substitute the male guide post with a 6-32 screw (not supplied).
3.
Install the 6-32 screw on one side of the board and the female guide post
with holder on the other side.
4.
The side with the 6-32 screw will allow you to gain cal the differential
probe.
5.
Proceed to the
Using the Deskew Fixture to Gain Cal
on page 18.
Using the Deskew Fixture to Gain Cal
Prior to probe gain calibration the oscilloscope must have had a 20 minute warm
up and completed a signal path calibration (SPC) procedure. See page 14.
NOTE
. Probes with an attenuation factor of greater than 20X cannot be
compensated. Probes with >2% gain errors or >50 mV offset errors cannot be
compensated.
NOTE
. The USB cable does not need to be connected. GAIN CAL does not
require external power.
Perform the following procedure to optimize gain and offset accuracy:
1.
Connect probe to the oscilloscope.
2.
Connect probe to the fixture. See Table 3 on page 14 and
Probe gain cal
connections
on page 14.
3.
From the tool bar, touch the
Vertical
button to display the oscilloscope
Vertical Setup
control window.
4.
Touch the Probe
Cal
button to display the vertical Probe Cal control
window.
5.
Select the oscilloscope channel to which the probe is attached.
6.
Touch
Clear Probecal
to erase any previous calibration data.
Differential and single
ended probe Gain Cal
Optimize gain and offset
accuracy
