User manual

Chapter 2 Performance Verification Test RIGOL
MSO4000/DS4000 Performance Verification Guide
2-3
3. Impedance test of the [EXT TRIG] channel
1) Disconnect the connections of the four input channels.
2) Connect the external trigger input channel [EXT TRIG] with the active signal terminal of
Fluke 9500B.
3) Press Utility  Extimpedance on the oscilloscope to set the input impedance of the
external trigger channel to 1 MΩ.
4) Turn on Fluke 9500B; set its impedance to 1 MΩ and select the resistance measurement
function. Read and record the resistance measured.
5) Press Utility  Extimpedance on the oscilloscope to set the input impedance of the
external trigger channel to 50 Ω.
6) Set the impedance of Fluke 9500B to 50 Ω. Read and record the resistance measured.
Test Record Form
CH1-CH4 (1 MΩ Input Impedance)
Channel
Vertical Scale
Test Result
Limit
Pass/Fail
CH1
100 mV/div
0.99 MΩ to 1.01 MΩ
500 mV/div
CH2
100 mV/div
500 mV/div
CH3
100 mV/div
500 mV/div
CH4
100 mV/div
500 mV/div
CH1-CH4 (50 Ω Input Impedance)
Channel
Vertical Scale
Test Result
Limit
Pass/Fail
CH1
100 mV/div
49.25 Ω to 50.75 Ω
500 mV/div
CH2
100 mV/div
500 mV/div
CH3
100 mV/div
500 mV/div
CH4
100 mV/div
500 mV/div
External Trigger Channel
Channel
Input Impedance
Test Result
Limit
Pass/Fail
EXT TRIG
1 MΩ 0.99 MΩ to 1.01 MΩ
50 Ω 49.25 Ω to 50.75 Ω