Instructions

RIGOL Chapter 2 Performance Verification Test
DG2000 Performance Verification Guide
2-2
Frequency Accuracy Test
Specification
Frequency characteristic
Accuracy
±(1 ppm
[1]
of the setting value + 10 pHz), 18
℃
to 28
℃
Note
[1]
: ppm denotes one part per million. For example, if the setting frequency is 1MHz and the actual output
frequency is between 0.999 998 999 999 999 99MHz and 1.000 001 000 000 000 01MHz, the instrument is up
to the specification requirement and the test passes.
Test Procedures
1. Make sure that the environment temperature is between 18℃ and 28℃ and
DG2000 has been warmed up for at least 30 minutes. Connect the channel
output terminal (take CH1 as an example; the test method is also applicable to
CH2) of DG2000 with the signal input terminal of the frequency counter using a
dual-BNC cable as shown in Figure 2-1.
DG2000 Series Frequency Counter
Figure 2-1 Connect DG2000 and the Frequency Counter
2. Turn on the frequency counter and set its output impedance to 1MΩ.
3. Turn on DG2000. When the Shift key is illuminated, press Sine/Preset and
tap the Def icon, then a dialog box is displayed, tap "Apply" to restore DG2000
to the factory setting.
4. Set DG2000:
a) Set the output waveform of CH1 to a sine waveform with 1MHz frequency
and 1Vpp amplitude.
b) Press Output1 or tap the channel output configuration status bar
to turn on the output of CH1 in the channel setting interface.
5. Record the reading of the frequency counter and judge whether the reading is
between 0.999 998 999 999 999 99MHz and 1.000 001 000 000 000 01MHz.
6. Set CH1 of DG2000 to output square, ramp and pulse waveforms (the
frequencies are 1MHz and the amplitudes are 1Vpp) respectively. Record the
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