RIGOL Chapter 2 Performance Verification Test
DG800 Performance Verification Guide
Frequency Accuracy Test
Specification
±(1 ppm
[1]
of the setting value + 10 pHz), 18
℃
℃
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
DG800 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
DG800 with the signal input terminal of the frequency counter using a dual-BNC
cable as shown in Figure 2-1.
DG800 Series Frequency Counter
Figure 2-1 Connect DG800 and the Frequency Counter
2. Turn on the frequency counter and set its output impedance to 1MΩ.
3. Turn on DG800. Press Preset and tap the Def icon, then a dialog box is
displayed, tap "Apply" to restore DG800 to the factory setting.
4. Set DG800:
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 DG800 to output square, ramp and pulse waveforms (the frequencies
are 1MHz and the amplitudes are 1Vpp) respectively. Record the readings of the
frequency counter respectively and judge whether the readings are between
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