RIGOL Chapter 2 Performance Verification Test
2-8 DG4000 Performance Verification Guide
AC Flatness Test
Specification:
Flatness
(relative to 1kHz Sine wave,
500 mVpp, 50 Ω)
Typical
≤10 MHz: ±0.1 dB
≤60 MHz: ±0.2 dB
≤100 MHz: ±0.4 dB
≤160 MHz: ±0.8 dB
Test Procedures:
1. Make sure that DG4000 has been warmed up for 30 minutes. Connect the 50Ω
load to the channel output terminal (take CH1 as an example; the test method is
also applicable to CH2) of DG4000; connect the 50Ω load and the voltage input
terminals of the digital multimeter using the BNC - dual banana cable as shown
in Figure 2-2
. Press Preset at the front panel of DG4000 to restore the
instrument to its default setting.
2. Configure DG4000: the output impedance of the channel tested is 50 Ω (press
Utility CH1Set Resi and select “Load”); the output is a sine waveform
with 1 kHz frequency and 500 mVpp amplitude. Press Output1 to enable the
channel output.
3. Select the AC voltage (ACV) measurement function for the multimeter. Enable
the dBm operation function and set the reference resistance to 50 Ω. Read the
measurement value (you can also use the Vrms value measured by the
multimeter to calculate the reference value according to the formula, dBm = 10
x Log10 [ (Reading2 / RREF) / 1 mW ]
). This measurement value is used as the
reference power (P
ref
).
4. Calibrate the power meter:
a) Connect the power sensor with the input terminal and [POWER REF]
terminal of the power meter respectively.
b) Press Zero/Cal Zero Cal and wait for the calibration to finish; then,
enable power reference and observe whether the measurement value of
the power meter is 0 dBm, 50 MHz.
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