Rohde & Schwarz M3SR® Series 4100 of HF radios represents a new, innovative and versatile generation of software defined radios (SDR).

Rohde & Schwarz ha sviluppato una serie di apparati di nuova generazione per i sistemi di comunicazione professionali, tipiche applicazioni a bordo ni navi, per il controllo di traffico aereo, per ambasciate e per applicazioni tattiche militari. Da quanto si legge nella broshure la struttura della R&S® M3SR Series 4100, pur definita a ragione SDR, sembra andare ancora sul sicuro. Niente RF Sampling (ADC/FPGA), ma impiego combinato della collaudata tecnologia RF analogica (Analog Mixers), dove R&S® è eccellente da sempre, seguita  da una seconfa IF a 48 kHz che viene campionata, digitalizzata e processata con l’impiego dei recenti sistemi DSP numerici implementati R&S® all’interno del’apparato.  (Per esempio si potrebbe dire una struttura a due conversioni + IF DSP simile a quella del’ IC-7700 reiterata da Icom anche sul nuovo IC-7600! in arrivo)

ENG: The R&S® M3SR Series 4100 combines the unmatched dynamic range of radios with analog mixers with the latest in digital IF and audio signal processing. The second IF frequency of 48 kHz is sampled, digitized and processed using digital ignal processors. This means that a wide range of IF bandwidths is available in all modes with high selectivity and optimized for voice and data communications. Digital signal processing also provides functions for noise suppression. The individual radio lines can be occupied by any of the waveforms supported by the R&S®M3SR Series 4100   including:
Voice (SSB, AM, FM) - Radio teletype (RATT) - Modem (STANAG 4285, STANAG 4539) - Automatic link establishment (ALE-2G/3G) - Tactical data links(Link-11, Link-22)

FK4120/4140 è  un rimarchevole sistema di preselettore - optional plug-in modules -  con cinque circuiti LPF da 0 Hz a 1.5 MHz e poi digitally tracking bandpass filters da 1.5 MHz a 30 MHz con 20 dB o 40 dB edge steepness at 10 % frequency offset. Questo per accrescere la selettività dei canali sia in trasmissione che in ricezione. Si migliorano molto i parametri di IMD di 2nd e 3rd ordine, la rejezione di IF e di immagine, l’immunità alla modulazione incrociata. Nella diretzione TX il rumore di fase viene soppresso con un basso valore tipico migliore di -165 dBc/Hz !   (Per esempio, negli RTX per Radioamatori, si può trovare il DIGI-SEL  Unit, Icom o il VRF+ uTune, Yaesu che combinati con gli ATU Unit, possono avere funzioni e performance abbastanza simili! )

ENG: The R&S® FK4120/FK4140 digitally tuned HF selectors are optional plug-in modules for the radios of the R&S®M3SR Series 4100. They increase the selectivity of the transmit and receive paths. Receiver parameters such as 2nd and 3rd order intercept, IF rejection, image-frequency rejection and crossmodulation immunity are significantly improved. In the transmit direction, the TX phase noise is suppressed to produce typical values as low as –165 dBc/Hz.
- Five-circuit lowpass filter (0 Hz to 1.5 MHz) for receive frequencies below 1.5 MHz
- Digitally tuned tracking bandpass filters (1.5 MHz to 30 MHz) with 20 dB or 40 dB edge steepness at 10 % frequency offset. (for Ham radio See the DIGI-SEL  Icom or VRF+uTune Yesu + the ATU Units)

DRW16 the Roke SDR employs a 16 bit A/D conversion to directly digitise the entire HF spectrum…

Il DWR16 della Roke Uk (divisione della Siemens) è un  Ricevitore SDR a conversione diretta (16 bit), down conversion implementata in FPGA • Da collegare  con USB2 al PC o Laptop • Interfaccia GUI e API sotto Windows® • Non ha la variazione continua dei filtri DSP però  dispone di • 74 BW in steps da 56Hz a 32kHz selezionabili in modo diverso per ciascun canale. Si tratta di un apparato  della Roke Uk compatto e a basso consumo • Very low power 3.5W • Registrazione dei segnali I/Q oppure di quelli demolulati in formato .wav. - Particolari struttura dallo schema a Blocchi che si può vedere in dettaglio cliccando l’immagine qui sotto per ingrandirla.  (click for larger image) - The DRW16 © 2008 Roke Manor Research Limited.

Il software DWR in dotazione apre più sezioni dedicate ai vari controlli • Permette di ricevere, monitorare lo spettro e controllare 4 canali indipendenti, sintonizzabili rapidamente su tutta la banda HF • Tenere sotto controllo l’intero spettrro di frequenza da 9 kHz a 40 MHz con risoluzione di 1Hz. Il DRW16 è dotato di • Attenuatore automatico o manuale (0dB to -31dB in 1dB steps) • Controllo dell’AGC in automatico (fast medium slow) oppure in manuale con steps di 6dB, valori diversi impostabile per ciscun canale • Frequency Counter dedicato alla sintonia, si attiva anche di volta in volta per ciscun canale monitorato cliccando su una della 4 barre dati dei canali (distinte da 4 colori) che indicano per ciscuno: • Frequenza • Bandwidth • Mode • BFO • AGC • Gain • Level S-meter • ALC • Wav.

Link to: Download the Roke DRW16 Datasheet .PDF

ENG: DRW16 employs A/D conversion to directly digitise the entire HF spectrum, Down conversion FPGA, USB2 interface to a PC or laptop  for furter IF filtering, signal demodulation, spectrum display 4 indipendent receiver channels and full HF spectrum. The DWR16 is supplied with a Windows®-based application providing a user-interface for receiver control and signal processing of the received signals.
The interface displays and controls the following functions: • Attenuator: automatic or manual mode (0dB to -31dB in 1dB steps) • Signal level - • Centre frequency: 0 to 40MHz with 1Hz resolution) • Bandwidth: (32kHz to 56Hz with 74 bandwidths) • Demodulation (I/Q, AM, USB, LSB, ISB, CW, FM) • Gain control: automatic (fast medium slow) and manual (6dB steps) • Signal level • Audio output level control: automatic or fixed (2 settings) • Audio output • Recording: I/Q or demodulated signal in .wav format • GUI showing: Simultaneous monitoring and display of four narrowband HF channels and full HF spectrum • Four independent receiver channels tune over entire HF band. The DRW16 © 2008 Roke Manor Research Limited.

Web SDR (Software Defined Radio via internet) in 20m, 40m e 80m multi utente, che si trova presso il Club Radioamatoriale ETGD, presso l’Università di Twente NL.
Su questa pagina potete ascoltare e controllare un ricevitore per onde corte (HF 80 40 e 20m) situato nell’Amateur Radio Club ETGD - PI4THT, presso l’Università di Twente, Paesi Bassi - Facoltà di Ingegneria Elettrica, di Matematica e Informatica. Contrariamente ad altri ricevitori controllati via web, questo ricevitore può essere sintonizzato ed ascoltato da parte di più utenti contemporaneamente, grazie all’utilizzo del Software-Defined Radio e un interfaccia lì progettata!
Si possono usare i vari comandi per sintonizzare, cambiare la Banda Passante del DSP, cambiare il modo e vedere l’intensità del segnale in dBm. Nel riquadro sotto vengono indicate le sigle (con scritte colorate) di chi ha fatto il log-in e le frequenze che utilizzano in tempo reale. No abuse, please!! 

Link to: Enter on the Web-SDR web page

ENG: Web-SDR on 20m, 40m and 80m multiple users, located at the amateur radio club ETGD at the University of Twente Nl.
On this page you can listen to and control a short-wave receiver (HF 80 40 and 20m band), located at the Amateur Radio Club ETGD - PI4THT at the University of Twente, Netherlands - Faculty for Elettrical Engineering Mathematics and Computer Science. In contrast to other web-controlled receivers, this receiver can be tuned by multiple users simultaneously, thanks to the use of Software-Defined Radio with special interface !

NOTE: The IMD DR3 and IP3 measurements are currently being performed and will be published shortl;
NOTE: The depictions of the FLEX-3000 shown above are of the current prototype unit;

ENG: The FLEX-3000 is a “direct decedent” of the FLEX-5000™, the full-featured, world class software defined radio transceiver for amateur use. The FLEX-3000 utilizes individually optimized bandpass filters to cover both the ham bands (Optimized 5th order bandpass filters for each ham band except for 160m which has a 7th order filter) and general coverage reception (low pass filter).The FLEX-3000 comes with an antenna tuning unit (ATU) as a standard feature, all ATU functions are automatically controlled using FlexRadio PowerSDR, as well as having manual control. Rx A/D converters running at either 48 or 96 KHz sampling . The FLEX-3000 uses the same PA design as the one found in the FLEX-5000, so this is not a newly developed RF power amplifier 100W, but uses a well-vetted design that is tried and true. The radio is capable of manually testing and calibrating itself if necessary. The FLEX-3000, like the world-class performer FLEX-5000, comes with FlexRadio PowerSDR 1.x software that performs all DSP, modulation, demodulation, filtering and control functions for the radio in addition to the lab grade spectrum analyzer Panadapter display. The FLEX-3000 uses the same Firewire® control and interface circuitry as the Fx-5000
Introductory price $1499,00 The FLEX-3000 is on sale *now* and is scheduled for delivery in January 2009

IARU Regione 1 HF, 10MHz Band Plan:
- 10.100 - 10.140 Max Bw 200Hz CW, QRP centre of activity 10.116MHz
- 10.140 - 10.150 Max Bw 500Hz Narrow band modes - digimodes
I modi digitali più usati nella banda dei 30 metri:
PSK31, OLIVIA 250/8, OLIVIA 500/16, OLIVIA, WSRP, MT-63 1KLONG, BPSK31, ALE400, RTTY,
C’è anche un Network per lo scanbio in tempo reale di informazioni sulla Propagazione dei segnali deboli con un folto gruppo di radioamatori attivi in QRP e QRPp che utilizzano il protocollo digitale MEPT_JT(”Manned Experimental Propagation Tests, by K1JT ) implementato in WSPR    Vedi Link
 
Link to: Network WSPRnet.org Drupal
Link to: Quick Start Guide TXT format v.1.0
Link to: 30 Meter Digital Spot Page
Link to: 30 Meter Digital Group (”30MDG”) 

ENG: I0NAA, Mario from Assisi wrote: “I was finally able to work with digital WSPR on the Hf Band of 30m (10.140MHz). This is the double screen-shot that shows the stations that I received on 8th September, 2008 where is the QSO of 20:44 and the report  received from EB1APK via  http://wsprnet.org/… More than 1400km WITH ONLY 5W and a dipole that almost touches the roof of the house !”
WSPR QSO is slower compared to other digital modes like JT65B used for EME due to strong protocol used, but results could be better !
A full manual for WSPR  has not yet been written, but a Quick Start Guide TXT format; See the Link .
Major digital-modes used on the 30 meter band:
PSK31, OLIVIA 250/8, OLIVIA 500/16, OLIVIA, WSRP, MT-63 1KLONG, BPSK31, ALE400, RTTY,
Ther is also a network for the real time exchange of information on the propagation of  Weak Signal with a group of amateur radio operators working QRP and QRPp  that use the  MEPT_JT   “Manned Experimental Propagation Tests, by K1JT )  protocol implemented in WSPR . See the Links

Il dispositivo DV Dongle si connette al PC, tramite una porta USB e provvede alla codifica e alla decodifica del segnale audio compresso, utilizzando il DVSI AMBE2000 vocoder, un Chip full duplex DSP e un softeware DV-Tool. Viene utilizzata la tecnologia AMBE, come in tutte le Radio D-STAR, per provvedere ad una efficiente trasmissioni della voce sul network tramite un Gat-way.  Questo nuovo modo di comunicare è interessante anche perché alcuni prodotti (ARD9000 o ARD9800) della AOR già in vendita, utilizzano per il proprio modo “HF Digital”, un protocollo AMBE vocoder e l’open G4GUO protocol; Il software DV-Tool da utilizzare con il DV Dongle gira sul sistema Windows XP / Vista, oppure Mac OS-X, o su molti appli Linux.

Link to: Donlge Installation, Usingh, Tecnica Info, FAQ
Link to: Radiocronache/I0GEJ Ham radio News D-STAR

ENG: The DV DONGLE uses three chips, oscillator, led’s, and discrete logic to implement it’s functionality.  The chips, from left to right, are the FTDI FT232RL serial to USB converter, the Atmel AT91SAM7S256 ARM7 based CPU, and the DVSI AMBE2000 vocoder; HRO (Ham Radio Outlet)  USA, Your Price: $199,95
The DV Dongle connects to your PC or Apple Mac via a USB port and provides encoding and decoding of compressed audio using the DVSI AMBE2000 full duplex vocoder DSP chip.  AMBE technology is used in all D-Star radios to provide efficient voice transmissions.  It is also used in some HF digital protocols by vendors like AOR (Mod. ARD9000 / ARD9800).  The DV-Tool application used with the DV Dongle may be installed and run on Microsoft Windows XP/Vista, Mac OS X, or many flavors of Linux

Link to: Download the Connection diagram .pdf

ENG: SWITCH BOX by Elad, is a automatic T/R switch senses transmitted RF (100W max) and switches your
antenna from SDR receive (PERSEUS)  to transmit using a relay. It shorts your receiver antenna input to ground to protect your SDR (Official distribution by WoodBoxRadio, IK3VIG, Beppe). Instead of using RF sense to switch the antenna, a control line input lets your key/keyer or PTT line switch the antenna. A complete switch control is available for the audio path of receiver and transceiver. Using CAT of your RTX, with third parts software which provide a SYNC function between RTX and your Peseus SDR, you can make an outstanding and high performance transceiving operations. Protection: The SWITCH BOX provides gas discharge protection on the antenna input.

E’ stato lanciato WonderRadio, il primo SDR (Software Defined Radio) HF+6m transceiver indiano. Questo nuovo apparato per molte parti deriva da articoli pubblicati su QEX (ARRL) da Gary. Le principali caratteristiche rese note sono: RX range: 12kHz - 60MHz / TX range: 160-6meter Power 1W PEP (500mW 6m) / IP3 +28dBm / Two Tone IMD: +99dB. Rahul VU3WJM ha dato la notizia e le news si trovano sul sito web della SDRtec.com

Linkto: SDR Technology info SDRtec.com

ENG: WonderRadio, the first Indian SDR (commercial) HF+6 meter all mode transceiver has been launched. This new rig is based on multi part QEX article: “A SDR for the Masses” by Gary Youngblood; Specifications: RX range: 12kHz - 60MHz / TX range: 160-6meter Power 1W PEP (500mW 6m) / IP3 +28dBm / Two Tone IMD: +99dB (will vary with different sound card) / Control inteface: PC Parallel Port (DB-25 connector) / Sound Card: Line In, Line Out, Spk Mic;

Switch BOX: la prossima disponibilità dell’unità di commutazione esterna del collegamento d’antenna tra il ricevitore SDR ed un RTX separato renderà possibile usare Perseus in modo atuomatico e trasmettere con il proprio RTX analogico e ricevere con il digitale, usufruendo di tutte le relative funzioni di filtraggio e di visione panoramica dello spettro. La sintonia sincronizzata di entrambi gli apparati, come sopra, potrà essere comandata sia con la “manopola” del Main Tuning del Transceiver sia dal software del Perseus.
Link to: Switch BOX Automatic Antenna Switch
Link to: SDR-IQ, Perseus, QS1R Measurements by IK1ODO, (.PDF)

His tests cover the sensitivity, dynamic range, 3rd order IMD along with searching for aliasing spurious responses etc.

Link to: TelePost Inc. by Larry Phipps N8LP   Link to:  Sound Card Info page

LP-PAN is a direct conversion receiver quadrature detector to provide I Q audio signals to a saund card. It is designed to receive a range of frequencies centered on 8.215 MHz (IF K3) It connects to the IF output bnc, you will need the KXV3 option for the K3, also needs to connect to a PC serial port to provide freqency data to the SDR application (..disply actual tuned freq…)

ENG: Current feature (update): Optimized for K3 Elecraft; Up to 192kHz display on PC, saund card dependent; IF imput at 8.215 MHz center frequency symmetrical display; Switching quadrature detector for 100dB+ dynamic range; Hardware or software mute; Balanced nd unbalanced outputs; Approx -130 dBm noise floor with K3 preamp on; 115dBm dynamic range; Adjustable gain to interface almost any sound card; 8.215 kHz L.O. Work with many SDR programs, PowerSDR, Rocky, SpectraVue, HRD etc.