Tag Archives: Elad FDM-DUO Availability

Medium wave DX: Colombia, Peru, Ecuador and Venezuela heard in Oxford, UK

Hi there, I thought I would share a few recent medium wave DX catches from South America. In the past month or so, I’ve managed to record signals from Colombia, Peru, Venezuela and one that I’m particularly happy about – Ecuador, which is rarely reported in Europe. All catches were obtained with my usual indoor home set-up – the brilliant little Elad FDM DUO coupled to the equally brilliant Wellbrook ALA1530 active loop antenna. I have started to take the Elad on DXpeditions now, having constructed a battery pack for it, but the results I’m yielding outdoors are so far mainly with shortwave reception, where the improvement in SNR is quite obvious in the size of the carriers I’m observing and much improved modulation/ audio clarity on the Tropical Band. Hopefully in time, similar results will yield on medium wave. In the meantime, Im very happy with the indoor performance and these catches demonstrate that. There are many more reception videos on my YouTube channel Oxford Shortwave Log, including a large number of signals recorded from North America on medium wave. Direct links follow below and further down, embedded reception videos. Thanks very much for watching, listening and I will you all excellent DX.

Medium wave DX: Radio Huellas 1470 kHz, Cali, Colombia, first reception

Medium wave DX: Bethel Radio 1570 kHz, Lima Peru, first reception

Medium wave DX: Radio Santa Maria 1490 kHz, Azogues, Ecuador

Medium wave DX: YVKS RCR 750 Radio Caracas 750 kHz, Venezuela

Clint Gouveia is the author of this post and a regular contributor to the SWLing Post. Clint actively publishes videos of his shortwave radio excursions on his YouTube channel: Oxford Shortwave Log. Clint is based in Oxfordshire, England.

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FDM-DUO SDR to ship May 2014

WoodBoxRadio announces the ELAD FDM-DUO

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(Source: WoodBoxRadio Facebook Page)

ELAD FDM-DUO Preliminay Specifications

Front-end
ADC Linear LTC2165-16bit 122.88MHZ clock
DDC FPGA Spartan 6 XC6SLX25 + Serial Flash for stand-alone mode.

USB IQ path through CY68013 for RX bitstream (192KHz up to 6.144Mhz single channel and 384KHz dual channel in PC mode)

Stand-alone RX IQ path STM32F4 ARM floating point microcontroller

LCD Controller Keyboard controller LPC1766 Cortex M3

TX modulator use a second STM32F4 Floating Point microcontroller + AD9957 DDS clocked at 368,64 MHz

Clocking source Si5338 drived by 10MHz TCXO or External reference input

TX modulator use I2S sourcing from MIC input (Cirrus CS5346) or USB input (CODEC CM6510B with customized firmware)

The third USB is a FTDI controller for CAT interface

This versatile platform allow transceiving in stand alone mode or in PC mode or in dual mode.

Frequency range: RX 9Khz to 52MHz direct sampling receiver
TX 160m to 6m others frequency to be defined

MDS: -132dBm
BDR: +115dB (500Hz)

Power output 5W
There is available a secondary SMA connector output with 0dBm level for use or as generator
open from 400Khz to 150Mhz (TBD)

2m VHF RTX will be an option as a board to fit (TBD)

The RTX have 2 Antenna inputs and can work as single RTX antenna or separate RX and TX antennas
(selectable by front panel or by CAT)

Standalone MOdes: CW CW+ CW- LSB USB AM

Firmware upgrade:
Cortex M3 by CAT
CY68013 by PC
STM32 RX or TX USB by memory stick through internal dedicated USBs
FPGA by PC
St-alone PROM TBD

When working in ST-Alone mode it is possible to connect an Android tablet (for example a Samsung Galaxy) to see the 192KHz spectrum and send some commands to FDM-DUO. Connection is made done through USB host of the Android and a TTL FTDI cable to EXTio connector of FDM-DUO

In dual mode PC software can show the 192KHz bandwidth of the FDM-DUO and it possible to demodulate with PC Software and with FDM-DUO with internal demodulator

In PC mode the RX bandwidth may have up to 6MHZ and internal demodulator is disabled.

This is a Software Defined Radio and these mode can be changed depending on new software that will be available from ELAD or for from who want to use Extio Dlls.

For using existing programs like HRD and FLDIGI….It will be very simple to plug the USB for CAT and USB TX like an external sound card.

FDM-DUO will be available also as Receiver only as FDM-DUOr name

From aesthetic point of view the box will be available SIlver or Black.

Price: 1159,00 Euro VAT included
Availability: 2/2014

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