Input Impedance - LeCroy Waverunner2 Series Service Manual

5.4

Input Impedance

The impedance values for 50Ω and 1MΩ couplings are measured with a high
precision digital multimeter. The DMM is connected to the DSO in 4-wire
configuration (input and sense), allowing for accurate measurements.
Specifications & Test limits
DC 1.00 MΩ ±1 %
AC 1.20 MΩ ±1 % (2mV/div to 99mV/div)
1.00 MΩ ±1 % (100mV/div to 10V/div)
±1 %
DC 50Ω
5.4.1 Channel Input Impedance
a. DC 1MΩ Ω Ω Ω
! Recall xxxP001.PNL or configure the DSO:
Panel Setups
Channels Trace OFF Channel 1, Channel 2, Channel 3 & Channel 4
Input Coupling
Input gain
Time base
Trigger mode
Rev. D
: Recall FROM DEFAULT SETUP
DC 1MΩ Ω Ω Ω on all 4 Channels
:
: 50 mV/div. on all 4 Channels
: 50 nsec/div.
: Auto
Performance Verification 5-3