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SOFTWARE DEFINED RADIO

designs built to your specifications

Software defined radios (SDRs) belong to a class of digital signal processing radios that are reconfigurable through software. Depending on the application, functions such as frequency conversion, channelization and band filtering, equalization, modulation/demodulation, error correction, etc. are all carried out in the digital domain. SDRs range from low data rate applications that can be implemented using a PC sound card and software to multi-gigasample per second data conversion systems that directly sample RF signals for test instrument or electronic warfare and similar applications. SDRs are well suited to implementing multiple layers of the OSI protocol stack in digital networks and can be reconfigured on the fly. Feel free to send us your requirements for your SDR application.

X-band Doppler and
Allan Variance Test
Receiver Module

SDR-based ADEV test set

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Applications

System for establishing frequency stability of carrier tracking transponders.  May also be configured for “three-corner-hat” Allan deviation measurement  of independent oscillators.

Configurations

Frequency conversion from X/C-band to low-IF, digital base-band processing system for extracting precision frequency/phase errors and computation of useful statistics (avg. freq., phase error, phase variances and ADEV).

Key Features

C-band uplink (7.16GHz), X-band downlink (8.41GHz) 
Frequency conversion to low IF.
High stability X-band local oscillator based on phase-locked DRO
Stable ovenized master clock locked to local atomic clock reference or GNSS
Concurrent uplink and downlink downconversion using single local oscillator
Hard real-time baseband processing using FPGA DSP
Ethernet data link for easy compatibility with PC for data handling and online or offline data reduction and storage with time stamps.

Options

C/X band frequency conversion, all time-sensitive functions locked to 10MHz  primary or secondary atomic reference or use GNSS disciplined OCXO.

SPECIFICATIONS

Electrical Specs

UL/DL frequency: 7.162/8.415GHz
Reference frequency: 10MHz
DSP sample rate: 48MSPS
System ADEV: 4.0x10-15 @100s
Input signal level: -20dBm per tone

SDR-based X-band Transponder

Applications

Transponder for use in two-way coherent links for Doppler metrology, ranging, data links on C/X band (7.1GHz UL/8.4GHz DL). 

Configurations

This unit can be configured for coherent carrier regeneration on the downlink (tracking the uplink carrier) as well as tracking and regenerating pseudo-noise ranging signals.  Data, telemetry and beacon functions are also options.  Transmitter

Key Features

C-band uplink (7.16GHz), X-band downlink (8.41GHz) 
Lightweight and compact
Programmable carrier frequency and channel/tracking bandwidths
Stable TCXO master clock
28V galvanically isolated power supply
Low cost COTS FPGA design
Modular design for straightforward “mix-and-match” functionality

Options

External downlink RF SSPA, custom antennas with or without integrated filters/LNAs, redundant system components, DRO local oscillators, USO master clock, over-the-air updating, S-band, C-band, X-band, Ku-band operation, multi-band operation.

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SPECIFICATIONS

Electrical Specs

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Mechanical Specs

120x150x60 mm
6-point mounting at base, M4 bolts
Thermal baseplate, must be coupled to thermal management