Rev. D Performance Verification 5-3
5.4 Input Impedance
The impedance values for 50
Ω
and 1M
Ω
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 M
Ω
±
1 %
AC 1.20 M
Ω
±
1 % (2mV/div to 99mV/div)
1.00 M
Ω
±
1 % (100mV/div to 10V/div)
DC 50
Ω
±
1 %
5.4.1 Channel Input Impedance
a. DC 1M
Ω
ΩΩ
Ω
!
Recall
xxxP001.PNL
or configure the DSO:
Panel Setups :
Recall FROM DEFAULT SETUP
Channels Trace OFF
Channel 1, Channel 2, Channel 3 & Channel 4
Input Coupling :
DC 1M
Ω
ΩΩ
Ω
on all 4 Channels
Input gain :
50 mV/div.
on all 4 Channels
Time base :
50 nsec/div.
Trigger mode :
Auto
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