------------ Původní zpráva ------------ Od: Alex Artieda Komu: , Kopie: ... Předmět: [Moon-net GG] New Hardware for Adaptive Polarization ready soon: CW and JT65 Datum: 25.4.2011 21:49:47 ---------------------------------------- Dear Friends I'm happy to announce that the long awaited EME Dual channel Receiver for Adaptive Polarization is here. Six months ago I informed about my SDR project. Finally, after more than 1 year of experimenting with different techniques and building more than 5 different SDR radios the IQ+ will be soon available. The IQ+ is a Direct In-phase Quadrature-phase Signal Acquisition receiver (IQSA), capable to work directly from 3.5MHz to 1.3 GHz; the band pass will depend on the filters installed. The main characteristic of the IQ+ is a Dual channel Receiver with both RX channels locked to the same LO. No more converters or transverters needed to reach your operative frequency; the IQ+ is a direct conversion receiver converting your operative frequency direct to audio base band especially designed for 144 and 432MHz (other frequencies available under demand) Because the IQ+ has two identical RX channels locked with the same Local Oscillator ( preserving amplitude and phase) it is especially designed for Adaptive Polarization, for JT65 work in conjunction with Linrad and MAP65 (not MAP65-IQ). It also works for CW with Linrad and many other programs. The Adaptive Polarization will bring to you an unlimited experience for CW, no more "faraday rotation" problems, especially in 50, 144 and 432 MHz . Instead of spending thousands of dollars in complicated mechanical systems to rotate your antenna array (or feeder in a parabolic dish) you will be able to rotate your RX polarization via software. For JT65 you will be able to work directly with MAP65 in conjunction with Linrad, taking advantage of multiple decoding at different angles of reception in 96 KHz band pass. No more limitations like in MAP65-IQ where you are limited to one single channel and one single polarization. A great advantage for medium and small EME stations where every fraction of dB counts. If your station is already capable to switch from vertical to horizontal you just need to add an additional pre-amp with a separate RX line. Together with the IQ+ and Linrad you will have a full Adaptive Polarization system in less than one afternoon of work. I will deliver the IQ+ radios with a step-by-step guide on how to create a new system or how to convert your existing system to an efficient Adaptive Polarization Station. A CD with a pre-loaded version of Linrad pre-configure will save you hours of work to integrate your station PC with the IQ+, Linrad, Map65 and any other SDR software. The IQ+ exists in different versions: IQ+ V (144-148MHz) Dual channel RX receiver locked with same LO IQ+ U (432-435MHz) Dual channel RX receiver locked with same LO IQ+ pan: pan adapter single channel RX receiver for those who operate in 23cm and up, just introduce the IQ+ pan in your IF line and you will have up to 192KHz band width spectrum (limited by your audio card, the internal IQ demodulator is capable up to 130MHz band width) Any IF available from 10MHz to 432MHz IQ+ wide: single channel RX without any kind of filter; capable to work from 3.5MHz to 1.3GHz IQ+ VU: A dual band (2m and 70cm) Dual channel RX receiver locked with same LO (per band) in same box with independent LO's , allow simultaneous operation (available only by demand) IQ+ TRX: Transmitter board with +20dBm output for 144 and 432 MHz (under development for 2012, other frequency by demand) The IQ+ performance is extremely good; with a dynamic range from 103 to 113 dB it outperforms most of the SDR radios currently on the market. The variation on the dynamic range will depend on how you will adjust the amplification levels starting from your antenna pre-amp - coaxial attenuation-internal preamp and audio card gain (A/D gain). Because in EME we work with external preamps it is practically impossible to guarantee a fix dynamic range for everybody. For that reason the IQ+ will give you the flexibility following a step-by-step guide to adjust the internal pre-amp and reach the best dynamic range you may obtain on your particular antenna -preamp system from 103 to 113 db (a signal generator will be required, all IQ+ are delivered with a pre-calibrated dynamic range in 103 dB). The IQ+ converts your operative frequency direct to audio base band, has 4 audio outputs (two I/Q pairs) and for that reason needs an audio card with 4 audio channels like DELTA44 or MAYA44. The IQ+ is compatible with more than 10 different SDR programs running under Linux, MAC and Windows. The initial prototype (proto1) was intensively tested in HB9Q with very good results. In the meantime 2 new prototypes have been built and soon proto3 will be sent to Leif (SM5BSZ). With his many years of experience he is assisting me in the optimization process. On the same way soon I will send a IQ+ unit to Roger (W3SZ) for testing purposes. The LO of the IQ+ is the Si570BBB from Silicon Labs (special version with high stability) giving the "Agility" to change your operative frequency with a resolution of 1Hz. Linrad and many other programs can control directly the IQ+ LO like PowerSDR, Winrad, CW Skimmer, Rocky, SDR-Radio and other ones. The IQ+ local oscillator introduces an innovative I2C isolator keeping voltages and ground loops completely separate from the PC, eliminating most of the artifacts, spur and birdies normally present in a SDR system without I2C insulation on the USB port. If the IQ+ was to be used for Radio Astronomy, an external LO connection option is available on demand. It needs only -7dBm power at the double frequency of the desired operative frequency. The LO stability is great enough for digital modes like JT65 making unnecessary any 10MHz external reference and therefore reducing the cost of implementation and complexity. The price and delivery time will be announced end of this June, batches of 30 units are programmed and many pre-orders are already in place. For those interested in the IQ+ (V and U, other versions later) please place a pre-order before June 30, 2011 and you will receive 5% discount. Soon I will go online with a home page where you can read more details and see some photos of the device. Last but not least I'm working hard with the various electronic devices providers for good prices. So far so good! I am confident that the IQ+ will cost less than 650.00 EUR per unit. Stay tuned 73 de Alex, HB9DRI