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PPM=Pulse Position Modulation is suited for data communications via optical fiber or short distance line-of-sight
as in radio control models. A pulse is encoded by placing it in a specific position in time. Proper sync is
required and transmission distortion can render it useless.
FM=Frequency Modulation which is more suited for audio communications as in broadcast radio or personal
communicators. The modulation of a carrier is accomplished by causing the frequency of the carrier to vary as a
function of the audio. The speed of the variation is the frequency of the audio and the amount of the variation is
the amplitude of the audio.
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What do the acronyms ppb and ppm represent?
ppb: parts-per-billion ppm: parts-per-million ppb and ppm are the ways of quantifying small concentrations, usually mass.
How many ml in 100 ppm?
In one Liter, there are 1000 milliliters. Ppm stands for parts per million. Ppm tells you the concentration of some liquid or gas in a solution. If there are 100 parts out of a million of CO2 (100 ppm), that is equal to 100/1,000,000, which means that .01% of the molecules in the mixture are CO2. mL and ppm are two different units of measurement. One represents distance and the other represents concentrations of fluids.
What does ppmw stand for?
If you mean ppm it is parts per million, i.e. mg per litre
Is milliliter per liter ppm?
no, ppm means parts per million. I.e. microlitres per litre or milligrams per litre
What are FM waves?
FM radio uses frequency modulation to broadcast sound over radio. FM radio waves are usually transmitted between 87.5 to 108.0 megahertz.
Why noice level less in FM than am?
Frequency modulation differs from amplitude modulation. FM coverage distance is less with more clarity due to non interference with carrier waves.
How you write ppm capital or small?
ppm
What should the chlorine level be in a pool?
Residential pools: 1.0 - 3.0 ppm; Commercial pools: 3.0 ppm - 5.0 ppm; Bromine levels: 4.0 - 6.0 ppm
What are the critical limits of micro-nutrients in soil?
Zn < O.6 ppm Fe < 4.5 ppm Mn < 2.0 ppm Cu < 0.2 ppm
Why are carbon dioxide levels decreasing?
Carbon dioxide levels are not decreasing in the atmosphere, in fact, they are increasing. In 1960 levels were 316 ppm. In 1970 levels were 325 ppm. In 1980 levels were 338 ppm. In 1990 levels were 353 ppm. In 2000 levels were 369 ppm. In 2010 levels were 388 ppm. Jan of 2012 levels were 393.09 ppm. As of today we are at 393.68 ppm at Manua Loa.
What is 46 ppm in percent?
46 ppm is 0.0046%
How do you convert 0.5mM to ppm?
0.5Mm = 50 PPM
What is 0.110 ppm as a percent?
0.110 ppm = 0.000011%
What is 28 ppb equal to in ppm?
0.028 ppm
How do you convert to ppm to percentage?
Multiply ppm by 10000.
How do you covert from 5 ppm to percent?
ppm means 1/1,000,000; percent means 1/100. Therefore, every percent is equal to 10,000 ppm. To convert from ppm to percent, you divide by 10,000.ppm means 1/1,000,000; percent means 1/100. Therefore, every percent is equal to 10,000 ppm. To convert from ppm to percent, you divide by 10,000.ppm means 1/1,000,000; percent means 1/100. Therefore, every percent is equal to 10,000 ppm. To convert from ppm to percent, you divide by 10,000.ppm means 1/1,000,000; percent means 1/100. Therefore, every percent is equal to 10,000 ppm. To convert from ppm to percent, you divide by 10,000.
What has been the historical carbon dioxide percentage of air over the past 10 000 years?
From 10 000 BC till 1860, the pre-Industrial Age, the carbon dioxide in air was approximately 278 ppm (0.0278%). In 1900 it was 295 ppm. In 1960 it was 315 ppm. In 1980 it was 335 ppm. In 1990 it was 350 ppm. In 2000 it was 369 ppm. In 2010 it was 388 ppm. In 2011 it was 392 ppm. (March 2011)
