HS402 – Tests (USB Connection)
The following tests are referred to PCB V3.0 without any box. Hardware option 3 (lowest noise).
Base Noise Analysis
Tests performed without probe, open BNC connectors.
Noise at highest voltage range
This test shows the following base noise:
- @2MSa/s 0.15%
- @400kSa/s 0.1%
- @200kSa/s 0.05%
- @50kSa/s 0.02%
Noise at lowest voltage range
This test shows the following base noise:
- @2MSa/s 0.7%
- @100kSa/s 0.4%
- @50kSa/s 0.2%
- @25kSa/s 0.08%
Cross channel noise
Cross channel noise is present. Part of the signal of one channel can be found on the other channel as noise.
When one of the channel saturates (input voltage greater than the maximum range) then the cross channel noise is greater. Channel saturation should be avoided during use.
In the following examples cross channel noise can generate a noise up to 0.5%. At the same conditions without cross noise the base noise would be 0.15%.
Sample Waveforms
Sample signal acquisition from a signal generator after calibration.
Tests with FFT
ADC 8-bit vs 9-up bits
Comparison between 8-bit ADC (provided by selecting the highest rate) and the next rate.
