Unique Technology Platform

Our patended technology platform provides following advantages:

  • unlimited synchronized scaling: techology enables to stream an unlimited number of I2S, PDM, TDM, SPI or other serial channels to host via USB 3.0 without using FPGA or DSP processors
  • proved in production 24/7: basis platform has been used in our broadcast monitoring solution, audio and microphone arrays for years in Europe, America, Africa, Asia, Australia in production 24/7
  • single clock and synchronized digitial data on multiple USB streams: all signals are synchronized with a common clock and acquired on host synchronised and interleaved per USB port. Multiple USB ports can be synchronized on host
  • high performance, low-costs: one mini-pc (e.g. Raspberry Pi, Odroid N2, Jetson Nano/Xavier) can process hundreds of channels
  • custom engineering for specific applications: the usage is not restricted to Audio or Radio solutions.

I2S Multituner Receivers

I²S (Inter-IC Sound, eye-squared-ess), is an electrical serial bus interface standard used for connecting digital audio devices together. It is used to communicate PCM audio data or I/Q RF data between integrated circuits in an electronic device. Following configurations are possible:

  • 31 x stereo channels of RF broadcast tuners, e.g. SI468x with I2S output
  • 31 tuners/frontends per USB using audio high-end audio ADC, e.g. a 25-channels receiver with a frequency range 85 MHz – 4.200 MHz and 32-bit, 2-channel, 768 kHz sampling, differential input A/D converter per channel

  • 31 tuners/frontends per USB using RF tuners, e.g. STA709, STA710, TDA7707, TDA7708, Si476x, Si479x or LV25810PEB that provide digital I/Q-output via I2S.

Architecture example for Sub-GHz receiver. 31 RF tuners/frontends per USB using audio ADC

Architecture example for sattelite receiver. 31 RF tuners/frontends per USB using audio ADC

Multi-Tuner Receivers

Single board multi-tuner receivers

BBRF103 is a next generation SDR receiver designed by Oscar Steila and Booya SDR (see Next Generation SDRs Blog for more details). Our multichannel version of BBRF103 implements up to 4 tuners on the single board and supports a multiple boards synchronisation.

Following configurations are possible per USB port using parallel ADCs:

  • 4 tuners x 8 bit or

  • 2-3 tuners x 9-16 bit

All channels on the board are sampled simultaneously and have a common clock (2 or 4 synchronous channels). All samples are sent to host interleaved.  Multiple boards (USB ports) can be chained together (e.g. using our CLK10 card) with a common clock and an additional synchronisation signal. External synchronisation is necessary only for the phase calibration.

The hardware example of 2 tuners x 14 bit can be found in the github repository (https://github.com/iroks/multituner-sdr. This example is based on R820T2 tuner and provides following characteristics:

  • Number of Tuners: 2
  • Bit Depth: 14 bit
  • Frequency Range: 24 MHz – 1.7 GHz
  • ADC Sample Rate: 25 MSPS
  • Bandwidth: up to 8 MHz spectrum (10 MHz on request with an alternative tuner) per tuner

It is possible to implement a product using alternative tuners, ADCs or IQ demodulators, e.g. up to 30 x RF tuners/frontends per USB and non-audio ADC theoretically possible to get 30 x R820T2 (or 15 alternative tuners with IQ output) per USB port.

Custom Engineering Project

Please contact us if your research/development project requires single clock driving ADCs/DACs and synchronized digital data on multiple USB streams. We would be happy to discuss your requirements.