Teledyne LeCroy DXC100A - Manual (Page 10)

DXC100A Differential Probe Pair
8 922259-00 Rev A
1. DA1855A and Oscilloscope Setup
Follow the sequence shown in the previous Short Calibration Procedure topic to
set up the DA1855A amplifier with your oscilloscope.
a. Remove the probe’s bottom cover and attach the probe to the
DA1855A.
b. Turn the entire DA1855A and probe to gain access to the adjustments.
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 CMRR performance.
c. Set the probes to X10 attenuation.
d. Initialize the DA1855A to its power-up reset state by turning its power
off and then back on.
At this point, the DA1855A is in the following state:
Setting Status
+Input Off
-Input Off
BW Limit Full
Gain X1
Attenuator ÷1
Input Resistance 1M
Precision Voltage Generator +000.00
Comparison or Differential Comparison
Effective Gain ÷100
e. Press the ÷1 Attenuator button on the DA1855A. The ÷1 Attenuator light
is now on.
f. Check that the DA1855A Effective Gain indicators change when the
probe is switched from 10X to 100X.
IMPORTANT NOTES ABOUT THIS STEP:

The DXC100A provides probe attenuation factor information to the
DA1855A through an 11” black wire which should be plugged into the
DA1855A Probe Coding Input jack on the DA1855A rear panel. If the