Derived from Open Source Design
The RX-888 is an improved design based on Oscar Steila (IK1XPV)'s BBRF103 original open source design. It inherits openness and transparency from its lineage. The software, firmware, and drivers are all open-source and available on GitHub.
16-Bit ADC @ 130MSPS
The RX-888 utilizes the LTC2208 16-bit ADC chip, allowing it to stream the entire frequency range from 10 kHz to 64 MHz directly to a PC via USB 3.0. You can monitor the entire 64 MHz spectrum at once.
10kHz to 1.8GHz Coverage
It can cover frequencies from LF, MF, SW, VHF, UHF to L band.
Improved Performance
The RX-888 features an LNA (Low-Noise Amplifier) to enhance medium wave and small antenna performance, addressing a limitation observed in the previous version.
Heat Management
Heat sinks have been added to mitigate excessive heat generated by the LTC2208 ADC. They are integrated with the product to give it a solid appearance.
Software Support
The RX-888 is currently supported by ExtIO plugin, HDSDR, SDR Console, and SDR++.
What's New
- The download link for the open source schematic has been corrected.
What is RX-888 SDR?
The RX-888 SDR is a unique SDR receiver. Unlike most common SDRs that handle signal processing either in hardware or in DSP code on the board, it leverages modern PC compute power to perform the DSP. The signal is sampled by a 16-bit ADC and sent over USB 3.0 with a 3Gbps data rate to the PC, which has enough CPU power to perform very stable filtering. It offers a remarkable 64 MHz bandwidth, which means you can see the entire 0-64 MHz spectrum at once.
Recent Updates
- A recent review on YouTube has been added, which shows how to use SDRConsole and RX888 MKII to receive all HF bands. Check Reviews for details.
- Detailed instructions on how to add a reference clock external connector to RX888 have been added. Check Support for details.
What's New in RX-888 MKII
Tunable Attenuation in the HF Path: The new model features a tunable attenuation mechanism in the high-frequency (HF) path, allowing adjustments from 0 to -31.5 dB.
Variable Gain Amplifier (VGA): Instead of the fixed low-noise amplifier (LNA) found in the original RX888, the MKII version now utilizes a VGA. This VGA provides a versatile gain range from -10 dB to +33 dB, applicable to both HF and VHF frequencies.
Upgraded Tuner Chip: The RX888 MKII employs the R828D, a newer generation tuner chip, replacing the previous R820T2.
Enhanced 64 MHz LPF: To further enhance image rejection, an improved version of the 64 MHz low-pass filter (LPF) is used.
Reference Clock Selection: Users can select between the internal reference clock or an external 27 MHz reference clock with a jumper.
The Story Behind RX-888 SDR
RX-888 traces its roots back to the original BBRF103 design, masterfully crafted by the ingenious IK1XPV, Oscar Steila. Our journey with RX-888 began in June 2020, when we reached out to Oscar to delve into the intricacies of its design and implementation. By then, the first generation of RX-888 was already taking shape in production. Oscar's generosity shone through as he willingly offered his support, testing, and validation for our budding creation.
As the collaboration blossomed throughout 2021, it gave birth to the MK2 version, a testament to our joint efforts. MK2 not only retained the essence of Oscar's initial vision but also embraced additional optimizations, elevating RX-888's dynamic range to new heights. Concurrently, we made a profound decision—to share the hardware design and software with the world. Oscar's GitHub account emerged as the go-to hub for releasing the firmware and software, becoming a beacon for enthusiasts.
Tragically, on January 3, 2024, we bid farewell to Oscar. His legacy endures as a trailblazing engineer and a compassionate mentor. In our hearts, we will forever cherish the indelible mark he left on RX-888 and the lasting impact of his teachings.