RIGOL Chapter 2 Performance Verification Test
2-2 DG4000 Performance Verification Guide
Frequency Accuracy Test
Specification:
Frequency Characteristics
Accuracy
℃
℃
Note: ppm denotes one part per million. For example, if the setting frequency is 1 MHz and the
actual output frequency is between 0.999998 MHz (-2 ppm) and 1.000002 MHz (+2
ppm), the frequency accuracy of the instrument is guaranteed and the test passes.
Test Procedures:
1. Make sure that the ambient temperature is between 18℃ and 28℃ and DG4000
has been warmed up for 30 minutes. Connect the channel output terminal (take
CH1 as an example; the test method is also applicable to CH2) of DG4000 with
the signal input terminal of the frequency counter using the dual-BNC cable as
shown in the figure below.
DG4000 Series Frequency Counter
Figure 2-1 Connect DG4000 and the Frequency Counter
2. Press Preset at the front panel of DG4000 to restore the instrument to its
default setting. Set the input impedance of the frequency counter to 1 MΩ.
3. Configure DG4000 to output a sine waveform with 1 MHz frequency and 1 Vpp
amplitude. Press Output1 to enable the channel output. Record the reading of
the frequency counter and check if the reading is between 0.999998 MHz and
1.000002 MHz.
4. Configure DG4000 to output a square, ramp and pulse waveform with 1 MHz
frequency and 1 Vpp amplitude respectively. Record the readings of the
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