External Trigger Input Impedance - LeCroy WaveSurfer 400 Series Service Manual

5.4.2 External Trigger Input Impedance

a. DC 50Ω
Recall Input Impedance - 50 ohm ext x1.lss or configure the DSO :
Select Setup trigger
Trigger on
Impedance
Connect the DMM to External, and measure the input impedance, reverse the
meter leads and measure the input impedance.
Average these two numbers and record the input impedance in Table 2, and
compare the result to the limit in the test record.
Recall Input Impedance - 50 ohm ext x10.lss or Set Trigger Source to Ext/10.
Repeat the test.
Record the measurements in Table 2, and compare the test results to the
limits in the test record.
Rev. D Sept 2007
: EXT
: DC 50Ω
Performance Verification 5-7