In this section let us discuss various superheterodyne receiver characteristics.To know more about the Tuned radio receiver and superheterodyne receiver click on each receiver highlighted. The TRF receiver had some inherent drawbacks which were removed in the superheterodyne receiver. The TRF receiver was used earlier in the 1940s. Presently, the superheterodyne receiver is the most popular and most widely used. These are the Tuned Radio Frequency (TRF) receiver and the superheterodyne receiver. However, only two of them became popular for commercial applications. In fact, various forms of receivers have been proposed from time to time.(B) Depending upon the fundamental aspects, the radio receivers may also be classified as under: Radar Receivers: Radar receivers are used to receive Radar signals.Television Receivers: Television receivers are used to receive television broadcasts in VHF or in UHF bands.This means that communication receivers are used for various purposes other than broadcast services. Communication Receivers: Communication receivers are used for the reception of telegraphs and short-wave telephone signals.broadcast transmitters which operate in VHF or UHF bands. Frequency Modulation (F.M.) Broadcast Receivers: These receivers are used to receive the broadcast programs of F.M.Amplitude modulation (A.M.) Broadcast Receivers: These receivers are used to receive the broadcast of speech or music transmitted from amplitude modulation broadcast transmitters which operate on longwave, mediumwave and short wavebands.(A) Depending upon the applications, the radio receivers may be classified as follows: We can classify the radio receivers in two ways:.This means that a radio receiver is electromagnetic equipment that picks up the desired signal, rejects the unwanted signals, amplifies the desired signal, and demodulates the modulated signal to get back the original modulating frequency signal. From the above discussion, we can summarize the main function of radio receivers as:.Amplify the modulating frequency signal.Detect the modulated signal to get back the original modulating or baseband signal.Select the desired signal and reject the unwanted signals.electromagnetic waves) by the receiving antenna. Intercept the incoming modulated signal (i.e.audio signal in case of the broadcast receiver) is generally weak, it has to amplify in one or more stage of an audio amplifier. carrier or modulated signal must be demodulated to get back the original, modulating or baseband signal (i.i.
Also since the received modulated signal contains a lot of noise or unwanted signals at adjacent frequencies, it must be selected and the noise must be rejected. therefore, inside the receiver, this weak signal is first amplified in an R.F. This modulated signal so received is generally very weak.This means that the modulated carrier signal is picked up by the antenna of the radio receiver. transmission medium and reaches at the input of radio receiver. This modulated carrier signal travels down the channel. We know that in a communication system, a radio transmitter radiates or transmits a modulated carrier signal.Frequently Asked Questions on Radio Receivers.Please contact us to come to an agreement before you order this article. Delivery will be made within 3 weeks to your desired address. Gladly we can offer a home delivery services: For a fee of 119€ it is possible to deliver you this article in greater area (Hamburg / Bremen / Dortmund / Düsseldorf / Köln / Frankfurt / Hannover / Berlin / Nuremberg / Munich / Stuttgart).
Overhauled, we offer it as a handicraft device withoutĭue to weight and size shipping is not possible. Please also look at the pictures, these are part of the articleĭue to the old age and because the device has not been Generally very good condition, only signs of wear and tear Braun TG5-8 radio receiver with wooden paneling in brown: Optical condition: