Instructions

Chapter 2 Performance Verification Test Overview RIGOL
MSO5000-E Performance Verification Guide 2-7
Bandwidth Limit Test
The bandwidth limit test verifies the 20 MHz bandwidth limit function of the oscilloscope by testing the
amplitude losses of the oscilloscope under test at the bandwidth limits.
Table 2-3 Bandwidth Limit
Input Impedance of the Oscilloscope
Available Bandwidth Limit
1 MΩ
20 MHz
Specification
Bandwidth Limit
Amplitude Loss
[1]
-3 dB, all-channel mode
Note
[1]
: Amplitude Loss (dB) = 20 × lg (Vrms2/Vrms1); wherein, Vrms1 is the measurement result of amplitude
effective value at 1 MHz and Vrms2 is the measurement result of amplitude effective value at the bandwidth limit.
Test Connection Diagram
Figure 2-4 Bandwidth Limit Test Connection Diagram
Test Procedures
1. Connect the active head of Fluke 9500B to CH1 of the oscilloscope, as shown in the figure above.
2. Turn on Fluke 9500B; set its impedance to 1 MΩ.
3. Configure the oscilloscope:
1) Press 1 in the vertical control area (Vertical) on the front panel to enable CH1.
2) Press 1  Attenuation to set the probe attenuation ratio to "1X".
3) Press 1  Impedance to set the input impedance to 1 MΩ.
4) Set the vertical scale to 100 mV/div.
5) Set the horizontal timebase to 500 ns/div.
6) Set the horizontal position and vertical offset to 0.
7) Set the trigger level to 0 V.
4. Output a Sine with 1 MHz frequency and 600 mVpp amplitude via Fluke 9500B.
5. Press Measure  Add  Category to select "Vertical". Then, select "VRMS" measurement
parameter to enable the effective value measurement function. Read and record Vrms1.
6. Press 1  BW Limit to set the bandwidth limit to "20 M".
7. Output a Sine with 20 MHz frequency and 600 mVpp amplitude via Fluke 9500B.
8. Set the horizontal timebase to 20 ns/div.
9. Enable the effective value measurement function. Read and record Vrms2.
Fluke 9500B
MSO5000-E