Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [transmitter]

Questions on a set of equipment used to generate and transmit electromagnetic waves carrying messages or signals, esp. those of radio or television.

Questions on a set of equipment used to generate and transmit electromagnetic waves carrying messages or signals, esp. those of radio or television.

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440 questions
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Is it possible to make a coil-less simple Shortwave Receiver

I am really a newbie here in Electronics and I'm into it as a hobby/passtime. I was going through this simple coil-less Shortwave Transmitter circuit on a blog. Q1 – BC548, X1 – 10.7 MHz ceramic resonator, 3 terminal, C1 – 10 nF, C2 – 100 nF, C3 –…
Amanda Miller
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Calculate the output IP3 of this transmitter

The following is a tutorial question from my teacher. A transmitter requires the IM3 products to be -65dB below the main tones when the total output power is 20 dBm. Calculate the output IP3 of this transmitter. This is what I think. The output…
kile
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Why is it so hard to get waves through the earth and ocean?

Quoted from the source Crystal sets to Sideband, the author said if you have an ohm meter measuring across the whole earth, the meter would display only 300 ohms. A while ago, I asked about earth being used for communications. They answered I could…
skyler
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How would I measure distance with a transmitter/receiver pair?

I am looking to build a a device that can transmit/receive its distance from another device, with the other device doing the same up to 50 meters. Will using a fm transmitter and receiver with a microprocessor be able to do this? I just started in…
Nick Campbell
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Distinguish between two ultrasonic transmitters

I want to have two ultrasonic transmitters emit signals to three receivers for measuring distances and relative position of the transmitters to the receivers. The distance between the transmitters is about 1ft and the distance between the…
Nikolaos Beratlis
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Orientation of ultrasonic receiver

I would like to use an ultrasonic transmitter and three receivers to be able to determine the position of the transmitter relative to the receivers. The distances to be measured are around 3-4 ft. I want to understand how the receivers orientation…
Nikolaos Beratlis
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Can I increase the signal strength by combining two radio transmitters with an antenna?

Can I increase the signal strength by combining two radio transmitters with an antenna? İt has only one oscillator and two transmitter circuit. Same signal. I connect antenna coil together in one antenna .
Murat Özen
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TS832 audio-video transmitter lowers its input voltage

I have a TS832 audio-video transmitter, and in its datasheet it says that the operating voltage is typically 12V, but can range from 7V to 16V. I am powering the transmitter with a 9V battery. I am measuring the voltage between its DC IN (+) and its…
Nefeli
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Phase modulation in the polar transmitter

In the polar transmitter, after the I and Q signals are converted to amplitude and phase, where the phase is in the range of -pi to pi, the phase is further differenciated to obtain the change in frequency and then fed to an ADPLL. If the original…
user61665
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Adjusting 300Mhz FM transmitter values for max legal power/range in canada

I read a law for canada and it states: Industry Canada permits transmitters that have an output lower than 100 µV/m at 30 meters (approximately 1 microwatt output). Now what fools me are these transmitter designs and why I can't produce much…
user143136
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Broadcasting channels per transmitter

Are television transmitters designed to broadcast two or more 6Mhz channels? Do commercial broadcasters do it in practice? If so, what are the limits (2, 3, 4... channels)?
user135549
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How to transmit a signal to a reciever over 50 meters?

I'm studying at a technical college in Denmark, and I'm doing an exam project involving emergency calls for elders. I'm currently trying to build a solution, but it involves a transmitter which can transmit at least 50 meters. Is there any way to do…
Søren Eriksen
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Use 555 Timer Voltage Doubler to Increase Range of Transmission

I have seen a number of 555 timer voltage doubler circuits. I am building a fm radio transmitter like this one: I understand that the higher voltage the farther the transmission range. Would this doubler suit my purpose. Also would it drain the…
NULL
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need to make a simple burst transmitter

i am looking to build a simple transmitter that will transmit on 433mhz automatically every 20ms or less. would this even be possible to make? the transmitter only needs to be simple and set off a very short range buzzer attached to a simple…
Mick
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Transmitter and receiver problems

Hi I am a construction site manager with very little knowledge in electronics. I have recently invented a new site safety device which involves the use of multiple transmitters and receivers. I purchased the transmitter and receiver relay sets on…
john fitzsimmons
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