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DXC100A Probe
DXC100A Probe Full Calibration Procedure
If the probe pair has been repaired or is to be used on a DA1855A other than the one it was originally calibrated
with, the probe pair should be calibrated using the following DXC100A Probe Full Calibration Procedure. The last
step is to perform the DXC100A Probe Short Calibration Procedure as needed for high slew rate signals.
Required Equipment
Equipment:
Differential Amplifier
Oscilloscopes
Calibration Generator
DVM
DC Voltage Generator
Probe Tip to BNC Adaptor (2)
BNC T Adaptor
COAX Cables (2)
Termination, 50 ohm
Termination, 75 ohm
Trimmer Tool
Refer to Figure 1.1 for the location of adjustments, and to the schematic diagram in Figure 1.2 for guidance.
Both figures can be found at the end of this manual.
1. DA1855A and Oscilloscope Setup
Follow the sequence shown in the previous DXC100A Probe Short Calibration Procedure topic to set up the
DA1855A amplifier with your oscilloscope. Remove the probe's bottom cover and attach the probe to the
DA1855A.
Note: Do not attach the probe upside down and then reverse the probes after they are compensated.
Reversing the probes after they have been compensated results in degradation of the CMRR performance.
Turn the entire DA1855A and probe to gain access to the adjustments. Set the probes to X10 attenuation.
Initialize the DA1855A to its power-up reset state by turning its power off and then back on.
6
Description:
LeCroy Model DA1855A or Equivalent
150 MHz Minimum Bandwidth
Tektronix PG506A or Equivalent
HP 34401A or Equivalent
HP 6209B or other stable source of 150V and 300V
Supplied with probes
Two female and one male BNC connector, no resistors
50 ohm
If oscilloscope has no 50 ohm input impedance
50 ohm may be substituted
Not supplied with probes
917422-00-RevA
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