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)

News from the 432 AND ABOVE EME NEWSLETTER SEPTEMBER 2008, VOL 36 #10. - Posted by I0NAA, Mario from Assisi -  It was a great conference with 168 EMEers attending and 85 guests. Everyone I talked with had a great time and thought the conference was excellent: location, facilities, technical sessions, refreshments, banquet, tours - (I especially enjoyed the tour of the Marconi home)… all were wonderful. The organizing committee and ARI Comitato Regionale Toscana, deserves our TNX; Editor AL KATZ, K2UYH; NL Web Version by W6/PA0ZN;

Link to: K2UYH’s Doc. Small Station EME Using JT44 JT65.pdf  (Needs Adobe reader)
Link to: Download the 432 and Above NL VOL 36 #10

Watch the 432 and Above EME NL September 2008 for more details and news, including the  “NF” Measurement result from EME 2008 (TNX hb9bbd). See the table “NF” dB on 432 - 1296 - 2300 MHz and Device type on 1st stage, See the PI9CAM reception of radio sources “driftscans diagram” 
Wiew this photo: PE1RDP’s 2 yagi array for 70 cm EME, OK1TEH’s antennas including dish used on 23 cm EME, PA3FXB will be QRV again soon, RW1AW’s 13 cm dish, WD5AGO’s 9 cm feed, OK1DFC and IK6EIW discussing EME contest rules, OK1DFC and IK6EIW discussing EME contest rules, Some of the spouses on tour (ndr: including the Missis Marina Xyl of i0naa) and F5SE checking the latest EME gear at the Marconi Museum!!

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

Update news: Interestingly the summary made by Hans, PA1HR’s with the data QST review, use the link below from “review table” (vedere una interessante tabella di raffronto dati di QST dei più noti RTX  con il Link qui sotto)

Link to: Hans, PA1HR’s HF RTX and RX  QST Review table
Link to:   ARRL Home-Page - www.arrl.org

NB: ARRL Members Only can now download the October, 2008 QST Product Review online in PDF format.

ENG: Some data drawn from ARRL product reviews are summarized in the table on image. These reviews are worth reading in their entirety, so as to obtain a systematic comparison between the most recent rigs produced by Icom, Yaesu, Elecraft. - This Icom is reviewed by Rick Lindquist, WW3DE National Contest Journal Managing Editor. Interestingly, in addition to the review, is also what he writes on the article-insert “A Contest Operator’s Perspective” from Dave Patton, NN1N, Membership and Volunteer Programs Manager.

Link to: Legislazione italiana, Italians Laws Radioamateur.eu   
Link to: Reciprocità radio, Worldwide Information OH2MCN  
Link to: La prima Radio, Fondazione G. Marconi