LeCroy WaveSurfer 400 Series Service Manual page 44

Recall Input Impedance - 50 ohm x10.lss or Set Input gain to 200 mV/div. on all
4 Channels
Recall Input Impedance - 50 ohm x1.lss or Set Input gain to 2 V/div. on all 4
Channels
b. DC 1MΩ
5-4 Performance Verification
Set the DMM with Ohms and Ohms sense to provide a 4 wire measurement.
Connect it to Channel 1.
Measure the input impedance, reverse the meter leads and measure the input
impedance.
Average these two numbers and record it in Table 2, and compare it to the limits.
Repeat the above test for all input channels.
Repeat the test for all input channels.
Record the measurements in Table 2, and compare the test results to the
limits in the test record.
Repeat the test for all input channels.
Record the measurements in Table 2, and compare the test results to the
limits in the test record.
Recall Input Impedance - 1 Mohm DC x1.lss or configure the DSO :
Panel Setups :
Channels Trace ON
Input Coupling :
Input gain :
Time base :
Recall FROM DEFAULT SETUP
Channel 1, Channel 2, Channel 3 & Channel 4
DC 1MΩ on all 4 Channels
20 mV/div. on all 4 Channels
50 ηsec/div.
Rev. D Sept 2007