From Wikipedia, the free encyclopedia. A UK Restricted Service Licence (often called an RSL), is typically granted to radio stations and television stations broadcasting within the UK to serve a local community or a special event.
What is RSL value?
RSL readings are an indicator of how well the radio can “hear” information being transmitted from the far end radio . The numbers are always preceded by a minus (-) sign. An example of an RSL reading would be -35. The closer to zero the reading is, the stronger the signal will be.
What is RSL in telecommunication?
The signal level at a receiver input terminal.
Why the RSL of microwave link is in negative?
The RSL number is normally represented as a negative value (Ie: -41dBm), so it is important to remember that the higher the negative value (further from zero), your transmit signal is weaker ; the lower the negative value (closer to zero), your transmit signal is stronger.
How is received signal power calculated?
7.2.
If P R is the received signal power and P T is the transmitted power, then in free-space propagation, P R ∝ G × P T f 2 × d α , where f is the carrier frequency, d is the propagation distance, G is the power gain from the transmit and receive antennas, and α = 2.
What is fading margin in wireless communication?
The amount by which a received signal level may be reduced without causing system performance to fall below a specified threshold value. It is mainly used to describe a communication system such as satellite, for example a system like globalstar operates at 25-35 dB Fade margin.
What is the RSL protocol?
Radio Link Protocol (RLP) is an automatic repeat request (ARQ) fragmentation protocol used over a wireless (typically cellular) air interface. ... A RLP detects packet losses and performs retransmissions to bring packet loss down to . 01%, or even . 0001%, which is suitable for TCP/IP applications.
What is interference in microwave?
Frequency's interference means that there is an external frequency for other microwave link that is interferring with our microwave link . ... But if there is a RSL reading in any value, meaning that the ODU is picking up the RSL from an existing microwave link that is using the same frequency.
What is the Fresnel zone and why is it important?
The Fresnel Zone is the area around the visual line-of-sight that radio waves spread out into after they leave the antenna . You want a clear line of sight to maintain signal strength, especially for 2.4 GHz wireless systems. This is because 2.4 GHz waves are absorbed by water, like the water found in trees.
What is link budget in microwave?
A link budget is an accounting of all of the power gains and losses that a communication signal experiences in a telecommunication system ; from a transmitter, through a communication medium such as radio waves, cable, waveguide, or optical fiber, to the receiver.
What is Fresnel zone in microwave communication?
A Fresnel zone (English: /freɪˈnɛl/ fray-NEL), named after physicist Augustin-Jean Fresnel, is one of a series of confocal prolate ellipsoidal regions of space between and around a transmitter and a receiver . The primary wave will travel in a relative straight line from the transmitter to the receiver.
How is signal strength calculated?
It is the value of the EIRP minus the transmission path loss and signal attenuation caused by obstacles. ... Downlink signal strength: signifies the strength of signals received by a wireless terminal from an AP. It is calculated as follows: Downlink signal strength = 1 – 2 + 3 – 4 + 5 – 6.
What is RF output power?
In radio transmission, transmitter power output (TPO) is the actual amount of power (in watts) of radio frequency (RF) energy that a transmitter produces at its output.
What is path loss of a signal?
Path loss, or path attenuation, is the reduction in power density (attenuation) of an electromagnetic wave as it propagates through space . ... This term is commonly used in wireless communications and signal propagation.
What is a good fade margin?
A fade margin of 10 dB is an absolute minimum. This would only be acceptable for links less than 3 miles or so. Up to 5 miles should have at least a 15 dB fade margin, and links greater than that should be higher. A fade margin of 25 dB is recommended for links greater than 5 miles.
How do you calculate a fade margin?
The net path loss previously derived is then subtracted from this number resulting in the received power level at the far end of the link. The difference between that value and the receiver sensitivity is the resulting fade margin.
