Credit / Open Hardware Attribution
APS2010 is a derivative work based on the open hardware project 2 GHz Active Probe, originally developed by James Wilson.
The foundational schematic and PCB layout are derived from the open-source design files published in oshw-active-probe. Full credit for the original concept and base implementation belongs to James Wilson.
This product incorporates open hardware licensed under the CERN Open Hardware Licence Version 2 – Strongly Reciprocal (CERN-OHL-S-2.0). In accordance with this license, the complete corresponding source files and modifications for APS2010 are made available under the same terms here.
APS2010 – Description
APS2010 is 2GHz, 1pF input capacitance, single ended active probe for oscilloscope.
Compact, enclosure-free design for minimal size and maximum accessibility. Fixed measurement tip enables fast, stable, and effortless probing. Replaceable stainless steel spring ground leads ensure reliable grounding and long service life
Provision of both short and long ground leads enables either low-inductance measurements or operation when no nearby ground reference is available.
Extra replacement ground leads are supplied with the probe.
Flexible connection to the oscilloscope. The probe is connected using two cables:
- Flexible SMA-to-BNC coaxial cable (approx. 75 cm)
- Flexible USB cable for 5 V power directly from the oscilloscope (approx. 100 cm)
Both cables are bundled together in a soft silicone sleeve.
The probe and all accessories are supplied in a soft drawstring pouch for convenient storage and transport.
APS2010 – Specification
- Sensitivity: 10:1 (attenuation)
- Bandwidth (-3dBr): DC – 2GHz
- Passband ripple: ±0.3 dB
- Input Capacitance: < 1pF
- Input resistance: 1MΩ
- Maximum input voltage: ±30V
- Output Impedance: 50Ω
Measured frequency response of the APS2010 probe is as follows. For detailed explanation about the measurement setup please refer the original author page
Input capacitance was measured with a VNA using a 120 Ω 0402 shunt resistor to improve sensitivity. The resistor contribution was removed numerically. Results are derived from the 100–600 MHz region.
