Preselector for sdr software

Nooelec nesdr smart xtr bundle premium rtl sdr w extended tuning range, aluminum enclosure, 0. The software defined radio revolution brought great flexibility in vhf and uhf reception. Available now the new version of code30032p with the full control and integration of perseus. Back in the day, this was usually implemented with a dual section reduced drive variable capacitor which would track an rf preselector with. Nooelec nesdr smart xtr sdr premium rtlsdr w extended tuning range, aluminum enclosure, 0. Tinycat digital preselector is remotely operated from a personal computer via usb over vcp by means of the.

Apr 25, 2014 over on youtube user theo faber has uploaded a video showing his adjustable multiband hf preselector project for his rtl sdr dongle. Tinycat digital preselector is remotely operated from a personal computer via usb over vcp by means of the usb control module option or from a radio or digital system supporting i2c bus data communication by means of the i2c bus control module option. Pretty excellent receiver for softwareeager unperceivable signals sdr receiver for vlflfhf. I needed an hf preselector to improve my sdr generalpurpose receivers reception of ham radio hf bands. Builtin highperformance auto antenna tuner to meet your needs at any time, so the antenna is no longer a. As such, it is not representative any more for all my sdr activities, which have continued since then, though mostly on the software side. A tuned loop antenna is also described that lets you use the elektor sdr receiver without an outdoor antenna. Nooelec nesdr smart xtr sdr premium rtl sdr w extended tuning range, aluminum enclosure, 0. Images show am breakthrough at a frequency of interest, firstly, with hf preselector used no mw filter, secondly without hf preselector but with mw filter and lastly, without either mw filter or hf preselector. The hf preselectorscrcat 2020 tunable digital radio preselector is suitable to work with sdr or analogue radios. Prices do not include delivery, checkout to see the final price.

Ill explain both the theory and construction in detail. Sdr rtl dongle and pre selector with hf converter youtube. Control software runs under windowsxp, windows vista, windows 7, windows 8. If you know of a program that is missing please leave. Flexradio flex6700 ideal for the demanding amateur. The sdrip uses a high performance 80 mhz, 16 bit adc with both dithering and randomization for best performance. The perseus is a directsampling software defined radio sdr receiver offering continuous 10 khz 30 mhz coverage. R820 dongle and shortwave upconverter with preselector. It features a 14 bit 80 mss analogtodigital converter with an exceptional 76 db snr bw 40 mhz, an highperformance configurable fpga digital downconverter with an up to 1 mss. G90 is a portable 20w hf amateur radio transceiver with an sdr architecture with builtin auto antenna tuner. It may interest ham radio enthusiasts, hardware hackers, tinkerers and anyone interested in rf. The application is compatible with the sdr ip and netsdr and also sdr iq and sdr 14 using a usb to ethernet server. I want to build a simple preselector filter and i plan to use a 1p12t rotary switch to switch between filters so i need 12 different filters.

The rf output is a filtered version of the rf input i. Apr 24, 2014 my project pre selector for wideband radios and in particular the popular tvsticks than can be used for sdr reception. It is a joint effort between airspy, itead studio and st microelectronics to build a state of the art sdr for hf and fm bands. Sdr rtltouch or hd sdr tuner with upconverter for am and ssb 030 mhz on laptop or android tablet. Charly 25 radiolab 16 transceiver kit standard, rx. In this post they cover topics like types of filters, insertion loss and preselectors on sdrs. The design of detachable display unit allows you to flexibly arrange the position of the radio. The qsf06 board has also an on board active switch which ensure fast.

A subreddit for the lowcost software defined radio sdr community. This kit is intended for people who would like an high end sdr trx with very good performance, using stemlab 122. Nooelec nesdr smart xtr bundle premium rtlsdr w extended tuning range, aluminum enclosure, 0. It combines high performance in a small package and has a lan interface for maximum flexibility. There are now dozens of software defined radio packages that support the ultra cheap rtl sdr. The sunsdr2 pro transceiver was designed for advanced operation on hf and vhf bands, even the most demanding operator will be surprised by its capabilities. The output iq bandwidth is configurable via software. Without preselection, noise and strong images of other nearby stations can cause strong interference. Today we offer the best wide band receivers which address these needs. A tuned loop antenna is also described that lets you use the elektor sdr receiver without. A high performance sdr will have multiple preselector filters that switch in. Sunsdr2 pro is a direct sampling sdr transceiver developed for serious dxing and contesting. In the spf08 perselectros panel set yes in the enable presel spf08 table to enable the use of preselector board. Elad qsf06 is a switchable preselector that allows the selection between 6 configurable filters.

Over on youtube user theo faber has uploaded a video showing his adjustable multiband hf preselector project for his rtlsdr dongle. The third post is titled a primer on rf filters for softwaredefined radio. Suitable to work with any software define radio sdr or analogue radio. Preselector for sdr software defined radio are used mainly to provide rejection to outofband interference and image from if undersampling. The rtl sdr is an ultra cheap software defined radio based on dvbt tv tuners with rtl2832u chips. Radiolab kits will be preconfigured to fit the requested sdr platform. May 10, 2016 into my preselector qsf06 there are 5 bp filters 403020151210 and the hp filter with cut off frequencies under 1. The digital preselector filter is a tunable preselector filter used to enhance receiver performance by reducing large interfering signals that cause distortion. Another very capable software package is genesis radio gsdr which is a variant of powersdr used by the genesis sdr transceivers. In view of the increase in receiving power, a very reasonable price. Softwaredefined radio sdr is a radio communication system where components.

Nov 16, 2015 to save the desired configuration in the fdmduo memory, use the fdmduo manager feature in the elad fmdsw2 sdr software. Without preselection, noise and strong images of other nearby stations can. The preleselector can be used in a variety of applications including software defined radios sdr, conventional receivers, and remote colocated sites. The pmsdr is a small, lowcost, hf bands full coverage software defined radio receiver that use a computer usb port and delivers iq audio signals to the pcs sound card and one of the few sdrreceivers with full coverage from 0,1 to 72 mhz. Circuit description main board the scrpreselector main board schematic is shown in figure 6. We categorize the programs into general purpose software, single purpose software, research software and software compatible with audio piping. Preselectors on the rtl sdr can vastly improve reception quality. As such, it is not representative any more for all my sdr activities, which have. It was designed by martin pernter iw3aut and its similar to the softrock xtall project. The scrpreselector is designed to operate with antennas and feed lines that have a 50. The last year or so it has become apparent that more amateurs are changing to the new range of sdr transceivers becoming available so i decided to try an sdr out. The settings table is formed by 8 rows, one for each filter slot of the spf08 board.

We encourage programmers to share any additions to improve the software. To say that software defined radios sdr are ubiquitous in 2016 is an understatement. Thus, a lowcost sdr provides semiprofessional reception power for the first time. Advantages and disadvantages of sdr chips nuwaves engineering. Remote control over dsl or mobile 3g and 4g connections provide a.

It is connected in line between the antenna and your receiver or transceiver providing filtering of r. Perseus is a vlflfhf receiver made by microtelecom is based on a outstanding direct sampling digital architecture. It is a new member of the xiegu product family and the first model of the g series. User can configure the internal board by choosing the right set of filters within the filter module family provided by elad or selfbuild.

The preselector described here allows the use of up to four filters, tuned under software control using varicap diodes. Flex6700 hf50mhz transceiver for the most demanding amateur. Preselector for sdr hf to uhf band multiband receiver awg rf. Without preselection, noise and strong images of other. After many hours of use i have to say that gsdr is my absolute favorite program to use when running my fifi sdr. P o box 249, hampton, middlesex, tw12 2uy united kingdom. The sticks are very cheap and the software free available on the internet.

Hipertuner rf broadband preselector nuwaves engineering. Introduction one of the requirements of a superhet receiver with a 455 khz if is a preselector at the antenna front end. Fdmsw2 sdr software is able to command the preselector board. Into my preselector qsf06 there are 5 bp filters 403020151210 and the hp filter with cut off frequencies under 1. Sdr sharp in this case, is operating stable under xp and w7.

The perseus is a directsampling softwaredefined radio sdr receiver offering continuous 10 khz 30 mhz coverage. It believe that it rather illustrates how usefuleffective an hf preselector may be. Ill explain both the theory and construction in detail below. This can be used to provide additional front end selectivity for hf and medium wave receivers protecting the receiver from strong out of band transmissions, wideband noise and other transmitters on multistation field days. Elektor s software defined radio sdr has been an unprecedented success in terms of publicity and sales, especially in the usa. The rtlsdr is an ultra cheap software defined radio based on dvbt tv tuners with rtl2832u chips. The performance of a receiver depends to a large extent on its input filters.

What i need is a really peaky sharp high q preselector. Price includes vat for eu customers, no vat will be applied to shipments outside eu if shipment will be done with our logistic partner. The software defined radio core can be either stemlab 12514 or stemlab 122. What once was limited primarily to the military radio market is now absolutely everywhere, from mobile phones, to wifi routers, to ham radio development boards, to extremely inexpensive for spectrum sensing. Using the elad fdmsw2 sdr software it is possible to configure the fdmduo to automatically select the proper filter as a function of the tuninig frequency. The rtl sdr can be used as a wide band radio scanner.

The rtlsdr can be used as a wide band radio scanner. Cross country wireless have recently revised their hf preselector to cover down to 100 khz. Sdr stands for software defined radio, and it refers to a radio communication system wherein the components or parts which have been typically used in the hardware such as amplifiers, demodulators, detectors, filters and mixers, etc. Checking the use tuning frequency related settings table checkbox the fdmsw2 software automatically select the correct sfp08 filter according to the. The original publication in may 2007 was graced not just by favorable feedback from the radio community but also by followup projects like a simple tester, a vlf addon and various software packages for tuning and decoding, like the g8jcfsdr package. My project pre selector for wideband radios and in particular the popular tvsticks than can be used for sdr reception. The hipertuner rf broadband preselector operates over a frequency range of 200 mhz to 2500 mhz, and is digitally controlled via a simple rs232 interface configuring the tuner for frequency of operation and rf gain control. Perseus is a sdr receiver and use pc software to make the process of demodulation. A selective input circuit improves antenna matching and immunity to interference from other strong signals.

Get just the signal im listening to and little else. The compatibility and support of application software most used by radio amateurs are provided by a dll library for the microsoft windows operating systems. Elektors software defined radio sdr has been an unprecedented success in terms of publicity and sales, especially in the usa. Weve also created a yahoo group for cutesdr discussions. To save the desired configuration in the fdmduo memory, use the fdmduo manager feature in the elad fmdsw2 sdr software. Pa3fwms software defined radio page note added in 2017.

A larger image of the hf preselector follows below. Pc communications are handled over a 100 baset port using 24 or 16 bit iq words. Preselector for sdr hf to uhf band multiband receiver. It covers all hf bands plus 50 mhz and 144 mhz vhf bands with a general coverage receiver. It features a 14 bit 80 mss analoguedigital converter adc, a highperformance fpgabased digital downconverter ddc and a fast 480 mbits usb2. The hf preselector scrcat 2020 tunable digital radio preselector is suitable to work with sdr or analogue radios. Ive set up a fairly short long wire antenna with a 9. Charly 25 radio lab 14transceiver kit premium stemlab 14 included, rx. Aug 08, 2016 to say that software defined radios sdr are ubiquitous in 2016 is an understatement. Charly 25 radiolab 14 transceiver kit premium, stemlab 14. On this page we will attempt to list, categorize and provide a brief overview of each software program.

Preselectors on the rtlsdr can vastly improve reception quality. Dec 10, 20 elektor s software defined radio sdr has been an unprecedented success in terms of publicity and sales, especially in the usa. Elad qsf06 is a switchable preselector that allows the selection between 6 configurable filter. Modern hardware along with the expertsdr2 software makes this highperformance sdr transceiver the perfect base station and at the same time perfectly suitable for field operations. Theo designed and built his own homemade upconverter for this project as well. With smartlink remote, just turn it on and play radio from anywhere. What once was limited primarily to the military radio market is now absolutely everywhere, from mobile phones, to wifi routers, to ham radio development boards, to extremely inexpensive software defined radio core.