The second version of the receiver developed by Franco and his collaborators in Milan Elad continued on the same line of great simplicity and power contained in a low- occupation of space, powered directly from the USB port that acts as an interface and above all economic.
The price of 525 € should be dell'S2 ivati and characteristics are even more interesting . Judging from the first preliminary information , Elad seems to have the desire to make a generational leap forward that was lacking in its competitors in Italy and abroad. The sampling frequency is dell'S2 of 122.88 MHz , which is equivalent to saying that in undersampling mode will be able to receive large portions of the spectrum to the VHF . The VHF input has two filters for tuning in bandea broadcast ( 74-108 MHz) and for the satellites meteeo and 2 meters of amateur radio ( 136-160 MHz) . The band gained in normal mode ranges from 9 kHz to 52 MHz Sensitivity is truly remarkable , with an MDS (minimum detectable signal, measured at 500 Hz bandwidth of 14 MHz ) equal to -132 dBm.
The management software / treatment dell'S2 has the same ability to capture the S1 , in other words can acquire (and save on the computer disk ) up to 6144 kHz of bandwidth, but in alternative offers the possibility of having two oscillators local digital completely independent , in practice two different receivers with a narrower band individual , to 384 kHz ( function supported in a Windows environment with the appropriate plug-in ExtIO " Multichannel ").
The platform stand alone DUO does not require interfacing with the computer thanks to the presence of a powerful microcontroller Cortex and beyond to version RTX for amateur radio, provides a version in receive-only DUOr referred explains Milan , S2 is a kind of junction with interface USB to manage through the pC. The basis of the conversion of the RF is the same for the DUO and S2: a Spartan 6 FPGA , XC6LX25 and the same is the A / D converter , and a 16-bit Linear ADC clocked at 122.88MHz .
The output of the DUO is scheduled for the end of February at a price of about € 1,160 for the transceiver and the receiver 800 for DUO .