The Fobos SDR is a high-performance Software-Defined Radio (SDR) receiver with a USB 3.0 interface. This device offers a continuous operating frequency range from 100 kHz to 6 GHz and up to 50 MHz bandwidth with 14-bit signal sampling resolution, ensuring full data integrity. With two auxiliary input channels, HF1 and HF2, for coherent direct sampling and a primary RF reception channel, Fobos SDR provides flexibility and precision in signal reception. Support for an external clock input, straightforward driver installation, and wide compatibility with popular software such as SDRSharp, HDSDR, and GNURadio make Fobos SDR an ideal solution for hobbyists, researchers, and professionals in the field of radio communication seeking to leverage the capabilities of SDR technology fully.

Main Features:

Double frequency conversion heterodyne
Two HF direct sampling channels
Fully continuous Rx data stream
14 bit ADC
USB 3.0 interface

Features:

Primary receiving signal path with double frequency conversion heterodyne UHF/VHF with switchable preselector and intermediate frequency filters
Auxiliary two coherent direct sampling Rx channels for HF band
High quality lumped filters
Precise 14 bit analog to digital conversion
Up to 50 MHzIQ sample rate
Fully continuous IQ data stream
RF SMA connectors
Cypress CYUSB3014-BZXC USB 3.0 interface controller
Robust USB3.0 TYPE B socket

Clock-in and clock-out options
Up to 6 lines of user defined low speed general purpose digital output
Compact PCB design, no ponderous parts
No switching power regulators, no onboard noise supplies
Low power consumption, no auxiliary external power supply needed, no cooling facility needed
EMI Shielded RF part
Power switch option, no unplug/replug needed
Lightweight API library for Windows and Linux
SDRSharp plugin interface
HDSDR ExtIO interface

Specifications:

Operation modes : double conversion heterodyne

two-channel direct sampling

Frequency range : 100 kHz – 25 MHz (direct sampling)

25 MHz – 6 GHz(double conversion heterodyne)

IQ sample rate (bandwidth) : 4 - 50 MHz
ADC resolution : 14 bits
Frequency stability : ±0.5 ppm
Blocking Dynamic Range: 82 dB UHF/VHF

86 dB in HF

Selectivity : -110 dBm combined selectivity
IQ Image rejection : 52 dB (software)
Maximum RF input: +10 dBm
Power source: USB Plug, 3.8 - 5.5 V nominal
Current consumption: 450 mA in idle state

670 mA in direct sampling mode

850 mA in full-band operating mode

Clock source: external, selectable within API

internal

External clock input: 10 MHz, high impedance
Clock output: 10 MHz, 5Ohm, 3.0 V p2p, permanent
Operating temperature: 0..+60°C
PCB type: 6-layer impedance controlled, ENIG finished
PCB dimensions: 110 mm x 60 mm
Outline dimensions: 130 mm x 60 mm x 16 mm

Applications:

SIGINT/COMINT
Spectrum survey
Wideband waveform digitizing
HAM radio (HF + VHF/UHF)
Test and measurement
Wireless, Cellular, IoT, Media streaming
Radio astronomy
High Performance HF/VHF Telemetry

Fobos SDR: Reveal the Spectrum

Broad Frequency Range: 100 kHz to 6 GHz, versatile for various applications
Continuous Data Stream: Uninterrupted recording and real-time analysis
Compact and Durable: Mobile-friendly, EMI-shielded
High-Speed USB 3.0: Quick data transfer, easy device connectivity
High-Quality Signal Conversion: Dual conversion, two HF channels, 14-bit ADC, 50 MHz IQ rate
Powerful Software Support: Lightweight API for Windows/Linux, SDRSharp and HDSDR ExtIO plugins, μSDR native support, GNURadio source
Flexible Connectivity: Clock input/output for system integration
Ease of coding: Application examples and source code are available, programming guides and manuals for quick start

Block Diagram: