Software Defined Radio (SDR) technology is used to receive and transmit radio signals. Radio signals can be received using the SDR_sharp software that can be downloaded to a personal computer and combined with the RTL-SDR dongle hardware that is connected to the computer. This report gives a brief explanation of the SDR receiver, the supported software, and some applications that can be implemented with SDR. Moreover, it is shown how to install the SDR_sharp software and the hardware Zadig. After installation, wideband FM (WFM) reception and adjustment of RF gain and frequency error is illustrated. The reception of some national, regional and community/commercial stations that can be received in Växjö Sweden is presented. Keyword: Software defined radio, FM radio.

Thesis (M.S.)--University of Wisconsin--Madison, 1967. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / This paper introduces the frequency spectrum characteristic of FM radio broadcast and the message format of RBDS (Radio Broadcast Data System). DGPS correction message in RBDS is described in detail. A design method of RBDS/DGPS system is proposed and the RBDS/DGPS system developed by us is introduced. Finally, some special advantages of RBDS/DGPS system are given.

This study will examine the role sport plays in a new democratic South Africa between the periods 1994-2002. Its objective is to look at how sport can be used, through the medium of radio, as a unifying activity in the diversified South African society. The study will specifically compare the broadcast of soccer and rugby on the two radio stations (Ukhozi FM and Umhlobo Wenene FM). The main aim is to explain the relevance of the inclusion of sport into the programmes of the two radio stations mentioned above, in the period 1994-2002. This comparative approach will also explain the extent to which the listeners of these stations understand the sporting codes mentioned (soccer and rugby) now compared to how they did before 1994. This study was undertaken because there is little of its kind (if any) that looks at the power of sport broadcasting on radio in changing people's mindsets, attitudes and misconceptions regarding soccer and rugby in a new South African context. There is also little literature available that looks specifically at how Ukhozi FM and Umhlobo FM listeners relate to the broadcast of these popular but diverse codes after the end of apartheid regime. The conclusions drawn up in this study show that radio is still powerful in changing people's behaviour and attitudes not only about different sporting codes aired on radio but also in the effort to promote unity among South Africans regardless of cultural, ethnic racial and genderdifferences. In this regard, radio does cross divides created by issues of colour, culture, gender, age and racial differences. / Thesis (M.A.)-University of Natal, Durban, 2003.

Radio broadcasting is usually classified as either a public broadcasting service or as being commercially driven. In the South African context, the concept of community radio has further complicated the definition of a public broadcasting service. While profit motivation and niche marketing characterize a radio driven by commercial means, community radio is predominantly non-profit oriented, directed towards a particular community. A public broadcasting service is, amongst other elements, typified as being geographically accessible to all and of paying particular attention to minority groups. Lotus FM, a radio station that came into existence on 16 January 1983, for the South African Indian community, describes itself as a "national public service-cum-commercial broadcaster with community responsibility". The South African Indian community, a minority group within the broader South African population, comprises of five language groups (Hindi, Gujarati, Urdu, Tamil and Telegu) and three religious groupings (Hinduism, Islam and Christianity). This research aims to explore the feasibility with which Lotus FM is accommodating the conflicting interests of being a melange of all three forms of broadcasting and reflecting it via its programmes. / Thesis (M.A.)-University of Natal, Durban, 2001.

Abstract The aims of the present study were to clarify the antenna function and radio frequency radiation (RFR) sensitivity of human subjects using theoretical calculations and field tests. The weak very high frequency (VHF) electromagnetic fields and spontaneous hand movements were recorded. Groups of university students, other volunteers and as a very interesting group, experienced well finders, were used as test subjects. The VHF field was studied using a spectrum analyser and tuneable narrow-band or broad-band meter with a dipole antenna. The hand movements were registered by potentiometric systems and electromyography (EMG). The test subjects (altogether n = 140) in different tests were walking, sitting in a cart being pulled slowly forward, or sitting in a moving car. The responses were observed and hand movements were recorded and analysed by personal computers. By visual inspection and using the Pearson's correlation, the results of different individuals have been compared with the measured intensity of far fields of a radio mast. Reaction spots and graphs defined by different individuals in the same experiment areas have been compared to each other. Hand movement correlated with the reactions of the forearm and shoulder muscles, e.g., pronator teres and trapezius, by EMG measurements. The reactions of some persons correlated with each other. Experiments in a slow moving wagon and in a moving car showed a correlation between the test subjects’ hand movements and the intensity of below 1 mV/m radio and TV signals measured in the vicinity of the test subject. In open field tests different persons usually reacted in widely different ways. The most evident results were recorded near the buildings, where the radio waves reflected from the wall and patterns of standing waves were clear. Many VHF frequency modulated (FM) broadcasting signals were summed at these places at the same time. It is concluded that the spontaneous hand movement reactions occurred as a response of the human body to the gradients of the VHF field intensity. The reaction generally occurred in interference patterns of multipath propagation or standing waves originating from the radiation of FM radio and TV broadcasting transmitters and radiation reflected from the walls of buildings or from other objects. This non-thermal reaction was clearly observable as spontaneous arm movements by 39 percent of the 85 tested students. / Tiivistelmä Tässä tutkimuksessa selvitettiin ihmisen herkkyyttä radiotaajuiselle säteilylle. Ihmisen toimimista radioaaltojen antennina tarkasteltiin teoreettisesti ja kenttäkokein. Heikkojen VHF-alueen radioaaltojen voimakkuutta ja tahattomia käsien liikkeitä rekisteröitiin valituilla koepoluilla. Koehenkilöinä on ollut yliopiston opiskelijoita ja muita vapaaehtoisten ryhmiä. Kiinnostavin ryhmä oli kokeneet kaivonkatsojat, joiden käsienliikereaktioihin radioaaltojen vaikutuksista löytyy viitteitä kirjallisuudesta. Radioaaltojen voimakkuuden vaihteluja mitattiin spektrianalysaattorilla ja laajakaistaisella VHF-alueen integroivalla mittarilla. Käsien liikkeitä rekisteröitiin potentiometriin perustuvilla liikeantureilla. Lihasten sähköimpulsseja rekisteröitiin elektromyografia- eli EMG-laitteella. Eri koesarjoissa koehenkilöt (yhteensä 140) kävelivät, istuivat hitaasti vedettävässä vaunussa tai istuivat liikkuvassa autossa. Reaktioita tarkkailtiin ja käsien liikkeet ja mitatut kentänvoimakkuudet rekisteröitiin ja analysoitiin tietokoneella. Eri koehenkilöiden tuloksia, reagointipaikkoja ja rekisteröityjä käyriä 5–35 km:n etäisyydellä mastoista tarkasteltiin silmämääräisesti. Pearsonin korrelaatiolaskentaa apuna käyttäen tuloksia verrattiin radiomastojen säteilyn voimakkuuteen. Eri ihmisten reagointikohtia ja käyriä samoilta koealueilta vertailtiin keskenään. Koeasetelmassa käsienliikkeiden todettiin korreloivan joidenkin kyynärvarren ja hartialihasten (mm. pronator teres ja trapezius) EMG-signaaleihin. Joidenkin koehenkilöiden tulokset korreloivat keskenään. Hitaasti vedettävässä vaunussa ja liikkuvassa autossa tehdyissä kokeissa tuli esille korrelaatio vartalon edessä olevien käsien loittonemis-lähestymis-liikkeiden ja koehenkilön välittömässä läheisyydessä mitattujen 1 mV/m -tasoisten radio- ja TV-signaalien voimakkuusvaihtelujen välillä. Avoimella kentällä henkilöt reagoivat hyvin eri tavoin. Parhaiten yhteys tuli esille rakennusten lähellä sijaitsevilla koealueilla, joissa radioaallot heijastuivat rakennuksen seinästä muodostaen selkeitä seisovan aallon kuvioita. Useat taajuusmoduloidut VHF-alueen radiosignaalit summautuivat näissä paikoissa samanaikaisesti. Johtopäätöksenä on, että tahattomat käsienliikkeet tapahtuvat kehon vasteena VHF-kentän voimakkuuden muutoksille. Reaktio tapahtui yleensä interferenssi-kuvioissa tai seisovissa aalloissa, jotka muodostuvat FM-radio- ja TV-lähetysten monitie-etenemisestä radioaaltojen heijastuessa rakennusten seinistä tai muista kohteista. Tämä ei-lämpövaikutustason reaktio oli selvästi havaittavissa olkapään tasalle koukistetun käden tahattomana ojennus-koukistus-liikkeenä 39 prosentilla testatuista 85 opiskelijasta.

Dissertation / This study investigates the role of radio in South African education, with Phalaphala FM as a case study. The aim was to investigate the extent to which Phalaphala FM's programmes include educational material and the extent to which the respondents listen to Phalaphala FM to satisfy their educational needs. Phalaphala FM as a regional radio station predominantly serves rural listeners, as they often do not have access to alternative forms of media. The theoretical point of departure is the uses and gratifications with its emphasis on the active audience concept. Content analysis of Phalaphala FM' s programme schedule was conducted to determine the amount of educational material. Focus group interviews and survey research were used to determine the respondents' media usage patterns. The results indicate that entertainment programmes are given more time on Phalaphala FM and that the respondents prefer entertainment programmes, to informational and educational programmes. / Educational Studies / M.A. (Communication)

Community radio and participation - the case ofSiyaya FM illustrates that radio is a powerful tool when it comes to communication and empowerment for active listeners. However, it also shows that community members are not empowered to the same extent if they are not engaged. Participation is essential for development and empowerment as described by, among others, Chambers (1983). At the same time the thesis demonstrates that it is difficult to involve all parts of a community because of power structures and therefore the radio station might end up empowering people already in power. Siyaya FM has, however, a role to play in Cato Manor with its high unemployment rate by training people the tool of radio and also educating listeners and informing them of important issues that can improve their knowledge. In addition, the radio station can take part in building social cohesion among the different groups of community members. By strengthening community radio stations the national authorities have a potential to meet the goals of their development strategies, while at the same time fulfilling the constitutional promise of freedom of speech for all by creating access to the airwaves for everybody. However, funding shortages create obstacles for many South African community radio stations to fulfil their task as community developers. / Thesis (M.A.)-University of KwaZulu-Natal, Durban, 2006

Dissertation / This study investigates the role of radio in South African education, with Phalaphala FM as a case study. The aim was to investigate the extent to which Phalaphala FM's programmes include educational material and the extent to which the respondents listen to Phalaphala FM to satisfy their educational needs. Phalaphala FM as a regional radio station predominantly serves rural listeners, as they often do not have access to alternative forms of media. The theoretical point of departure is the uses and gratifications with its emphasis on the active audience concept. Content analysis of Phalaphala FM' s programme schedule was conducted to determine the amount of educational material. Focus group interviews and survey research were used to determine the respondents' media usage patterns. The results indicate that entertainment programmes are given more time on Phalaphala FM and that the respondents prefer entertainment programmes, to informational and educational programmes. / Educational Studies / M.A. (Communication)

Today. the pandemic of HIV/AIDS has become a serious challenge especially in developing and underdeveloped nations. For this reason, all nations, different health institutions and nongovernmental organizations are investing their wealth to increase public awareness on the seriousness of this pandemic disease. Media institutions also play an unparalleled role in controlling HIV/AIDS through educating the society. HIV/AIDS is a great threat both to South Africa and Eritrea as they are part of the Sahale Sahara of Africa. That area is highly affected and infected by the pandemic. It is certain that media have been used to disseminate information in the society about HIV/AIDS in both countries. This study attempts to identify the nature of communication strategies that are employed against HIV/AIDS by Radio Ukhozi FM in South Africa and Radio Dimitsi-Hafash Programme Tigringa in Eritrea. The study attempts to identify the communication formats that both radio stations utilize to increase public awareness about HIV/AIDS. It also examines whether both stations are using Entertainment-Educational communication strategies to disseminate HIV/AIDS messages. Furthermore, the study assesses target audience participation; both stations assessment of their programme and scheduling of HIV/AIDS awareness messages. Finally, it attempts to single out the challenges that both stations encounter in designing messages for combating HIV/AIDS in their respective communities. / Thesis (M.A.)-University of KwaZulu-Natal, Durban, 2004.