Tender For Purchase Of Educational Trainer Kits Including Am Transmitter, Am Receiver, And Frequency Modulation & Demodulation Trainer.

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Tender For Purchase Of Educational Trainer Kits Including Am Transmitter, Am Receiver, And Frequency Modulation & Demodulation Trainer. Am Transmitter Should Contain 1) Audio Oscllator With Variable Amplitude(0-2V) And Freq (300H2-3.4Kliz), 2) A) If Carrier Qssfut. Amp 400Mvpp B)Final Carrier 1 Mhz Amp 100Mv 3J Modulutot A)Ssb B)Dsb. 4) Switch To Connect Either Ssb And Dsb O/P To Antenna Si Collapsiule Antenna To Transmit I Mhz Am Waves. (Antenna Min Length After Collapsing 25 Max Leneth After Expansion 1 Meter Am Receiver - Should Contain 1) Antenna. Collapsible Antenna To Receive I Mhz Am Waves. (Antenna Min Length After Collapsing 25 Cm Max Length After Expansion I Meter) 2) Rf Amplifier To Ampliff Im.Hz Am Wave. 3) Tuneable Freq. Local Osc (From 980 Khz To 2060 Khz) Li Vti*R. It Take Input From Rf Amplifier And Local Oscillator And Produces If 455 Khz. Si M Amplinet: Uftet Mixer 2 To 3 Stages Of If Amplifiers Are Used To Ampliff If Signal. Oi DT..Iotr The Ouput Of If Amplifiei Is Given To Diode Detector And Product Detector (Selectable) 7) Audio Amplifier: With Output From 0V To L0 Volts Si Th. Tit Should Consists Of Agc (Automatic Gain Control Circuit) To Handle Large Sigaal Changes In Input. 9) Sneaker: Should Handle 0V To 10V Input Signal. Frequency Modulation & Demodulation Trainer Strould Coniain 1) Audio Oscllator With Variable Amplitude(O-L0V) And Freq (300H2-3.4Khz) 2) Various Types Of Fm Modulators A) Balanced B) Varactor Modulator And C) Freq Modulator (Ic Xxzzoa Uaija Vco). All The Modulators Should Produce Output Frequency 455 Kllz +/- 3Khz. 3) Mixer/Amplifier: Gives Output 0V To L0 Volt. 4)Amplitude Limiter: Gives Constant Amplitude Signal. Si Uuriour Types Offm Demodulation Circuits A) Quadrature Detector. B) Detuned Resonance Detector Cj Foster Siety Dlratio Detector. D) Phase Locked Loop Detector (Ic 4046).