A new 50 Ohm 4 channel USB attenuator has been engineered by JFW Industries to help automate radio frequency (RF) testing.
JFW model 50P-2089 SMA operates from 200 MHz to 6,000 MHz with attenuation range 0 dB to 95 dB by 1 dB steps. All four attenuators are individually controlled, and test software is provided with the USB attenuator.
USB test software features:
- Test software manual available for download.
- Auto-discovery of any JFW USB attenuators connected to the computer.
- Control attenuator(s) using a slider bar, increment buttons or manually entering the attenuation value.
Source: JFW Industries
- Set persistent device names for better organization of complex test scenarios.
- Create test scripts that can control many attenuators.
- Fade and handover commands can be executed in sequential or synchronous mode.
- Saving and loading of scripts in JSON format.
- Requires Microsoft Windows Vista or greater.
- Requires Dot Net Framework 4.0 or greater.
If users prefer to control the USB attenuators using Python instead of the standard Windows-based test program, JFW does offer a Python library (jfwusb.py).
Python library features:
- Auto-discovery of any JFW USB devices connected to the computer.
- Set persistent device names for each attenuator.
- Set/read attenuator by its device number.
- Set/read attenuator by its serial number.
- Set/read attenuator by its user defined name.
- Set all attenuators to the same dB value, min dB value or max dB value.
