Bandwidth Limit Test - Rigol DS1000E series Performance Verification Manual

Chapter 2 Performance Calibration Test

Bandwidth Limit Test

Specification:
Amplitude Loss
Explanation:
Amplitude Loss (dB) = 20×lg
Test Device: Fluke 9500B
Test procedures:
1) Connect the active head of Fluke 9500B to CH1 of the oscilloscope.
2) Set the output impedance of Fluke 9500B to 1 MΩ.
3) Configure the oscilloscope:
Press CH1 in the vertical control area (VERTICAL) at the front panel to enable CH1.
a)
Rotate VERTICAL
b)
Rotate HORIZONTAL
c)
Rotate HORIZONTAL
d)
horizontal position and vertical position to 0 respectively.
Rotate TRIGGER
e)
Press CH1  BW limit to enable the function of the bandwidth limit.
4)
5) Output a sine waveform with 1 MHz frequency and 600 mVpp amplitude from Fluke 9500B.
6) Enable the root mean square measurement function of the oscilloscope. Read and record
Vrms1.
7) Output a sine waveform with 20 MHz frequency and 600 mVpp amplitude from Fluke 9500B.
8) Rotate HORIZONTAL
ns.
9) Read and record root mean square value Vrms2.
10) Calculate the amplitude loss and compare it to the specification: Amplitude Loss (dB) =
(Vrms2/Vrms1)
20×lg
11) Output a sine waveform with 50 MHz frequency and 600 mVpp amplitude from Fluke 9500B.
12) Rotate HORIZONTAL
ns.
13) Read and record root mean square value Vrms2.
14) Calculate the amplitude loss and compare it to the specification: Amplitude Loss (dB) =
(Vrms3/Vrms1)
20×lg
15) Keep other settings of the oscilloscope unchanged and set the vertical scale to 200 mV/div.
16) Output a sine waveform with 1 MHz frequency and 1.2 Vpp amplitude from Fluke 9500B.
17) Repeat step 6).
18) Output a sine waveform with 20 MHz frequency and 1.2 Vpp amplitude from Fluke 9500B.
19) Repeat step 8), 9) and 10).
20) Output a sine waveform with 50 MHz frequency and 1.2 Vpp amplitude from Fluke 9500B.
21) Repeat step 12), 13) and 14).
22) Keep other settings of the oscilloscope unchanged and set the vertical scale to 500 mV/div.
DS1000E/D Performance Verification Guide
-3 dB to 1 dB
(Vrmsn/Vrms1)
. Wherein, Vrmsn represents Vrms2 and Vrms3.
SCALE to set the vertical scale to 100 mV/div.
SCALE to set the horizontal time base to 500 ns.
POSITION and VERTICAL
LEVEL to set the trigger level to 0 V.
SCALE of the oscilloscope to set the horizontal time base to 50
. Amplitude loss should be in the range of the specification at this point.
SCALE of the oscilloscope to set the horizontal time base to 20
. Amplitude loss should be lower than -3 dB at this point.
RIGOL
POSITION to set the
2-7