Impedance Test - Rigol DS1102E Service Manual

RIGOL

Impedance Test

Specifications:
Input Impedance
Test Devices: Fluke 9500B or Digital Multimeter and BNC (male) to Dual-banana
Plug Cable. In this manual, the test device is Fluke 9500B.
Test Procedures:
1. Impedance test of CH1 and CH2
1) Connect the active head of Fluke 9500B to CH1 of the oscilloscope.
2) Configure the oscilloscope:
Press CH1 in the vertical control area (VERTICAL) at the front panel to
a)
enable CH1.
Rotate VERTICAL
b)
mV/div.
3) Enable the Fluke 9500B and select the resistance measurement function,
read and record the resistance measurement value.
Rotate VERTICAL
4)
mV/div; then, read and record the resistance measurement value.
5) Turn CH1 off. Repeat the above test steps to test CH2 and record the test
results.
2. Impedance test of [EXT TRIG] channel
1) Disconnect the connections of the two input channels.
Connect the active head of Fluke 9500B to the external trigger channel [EXT
2)
TRIG].
3) Enable the Fluke 9500B and select the resistance measurement function,
read and record the resistance measurement value.
Test Record Form:
Channel Vertical Scale
100 mV/div
CH1
500 mV/div
100 mV/div
CH2
500 mV/div
EXT TRIG
3-12
1 MΩ ±2% (0.98 MΩ to 1.02 MΩ)
SCALE to set the vertical scale of CH1 to 100
SCALE to adjust the vertical scale of CH1 to 500
Test Result
--
Chapter 3 Performance Test
Limit
≥ 0.98 MΩ and ≤ 1.02
MΩ
Service Guide for DS1000E, DS1000D Series
Pass/Fail