0
Add your answer:
Earn +20 pts
What frequency range does the US use for FM broadcasting?
60hz frequency is being used in us
What is telestimulation?
Telestimulation systems are described for chronic indirect muscle stimulation in caged rabbits and mice. Both system use a 5 MHz carrier frequency transmission and consist of a transmitter and a receiver. The latter is fixed to the back of the animal.
How t convert high frequency into low frequency?
To covert a high frequency to a low one, we use flip-flops.
Why PLL better than VCO?
A PLL is different than a VCO. Each has its own use. Actually a PLL (Phase Locked Loop) contains a VCO (Voltage controlled oscillator). A VCO is an oscillator whose frequency is related to an input voltage. You can use it when you need a varying frequency that is controlled by a varying voltage. But it is not great at outputting a consistant exact voltage because it is very sensitive to its environment (e.g. temperature). A PLL will "lock" its output frequency to some input frequency. So it can oscillate at a frequency that is controlled by an input oscillator. Not too useful if the output frequency is the same as the input. But the output frequency can be divided before it is compared to the input. This allows the output frequency to be higher (some multiple of) the input frequency. Once a PLL is "locked on" to an input frequency it can be very stable.
What is cross polarization isolation?
Cross polarisation isolation or Cross Polarisation Discrinimation (XPD) is the difference in dB of received signal level (RSL) at the receiver when in turn, the transmitter has the same and different polarisation with the receiver. A antenna with this greater value is prefered. This information is useful in microwace design when in the same area we can use the same frequency with different polarisation . For example: TX1 : vertical polarisation ---> RX1 : Vertical pol. TX2 : horizontal pol. ---> RX2 : horizontal pol. They all operate in the same frequency. The signal from TX1 , TX2 will be separated corresponding to the value of XPD.
What frequency range does the US use for FM broadcasting?
60hz frequency is being used in us
Is it possible tx and rx at same wavelength at the same time?
No, it is not possible for a transceiver (tx and rx) to operate at the exact same wavelength at the same time. This is because the transmitter and receiver need to use distinct frequencies to distinguish between outgoing and incoming signals to prevent interference.
What is the difference between CDMA and FDMA?
TDMA provides many users to access the same frequency channel but different time slots. In FDMA provides many users can be used different frequency channel but at same time. circuit board
How do you create transmitter?
we can create transmitter by using modulator circuit depending what frequency range you would like to use if you want to use FM range 88 to 108 MHz than you may refer to FM modulators and if you are going to more than 300MHz than you will need RF receiver.
Why is it an absolute necessity to license and control the use of a radio frequencies?
A: THE F.C.C control frequency and power output for all transmitter. The simple factor is if there is no rule then next door neighbor transmitter will swamp all my TV radio reception possibly for blocks away. So by licensing a transmitter these rules must be abide before issue
What is a difference between a tally table and a frequency?
a tally table use whole numbers and frequency use the same number
How RF direction finder works?
RF direction finders use antennas to receive radio frequency signals from a transmitter. By comparing signal strength or phase differences at multiple antenna locations, the direction to the transmitter can be determined. This information helps locate the source of a radio signal.
What happens if you get a new radio control car and you still have your old remote?
If the receiver in the new car and the old transmitter are on the same frequency, go ahead and try it--it might still work and it can definetely work if you use crystals: get a whatever color crystal set and off you go!!
When is the best time to use a frequency table?
The best time to use a frequency table is when you have disorganized raw data, that need to be sorted, usually to find trends in the data.
How do you use the SFC?
use for industrise transmitter comnication
What is the use of logic gates in fm transmitters?
They can be used for error checking. If the transmitter is off frequency, the logic gates can be used to inhibit the transmitter, to stop interference. Early forms of PLL (Phase Locked Loop) control may also use logic gates to act as dividers. This is normally taken care of by a single dedicated chip, these days.
Do all motion sensors have a transmitter and a receiver?
Some devices have the receiver and transmitter built into the same device. Some devices use only a detector and register changes in emitted IR "patterns" (for example) to infer motion.
