Rf Definition and 258 Threads

just a simple question, do Rf have a unit? i'm measuring in cm, so do i use cm as unit for Rf or do just leave it blank?

rf value!?#@$%^& Hey guys, Before doing a lab tomorrow, we need to find out what Rf values are, i can't seem to find a defintion about it online so some help would be great. Basically we are doing this BIO but the teacher won't tell us exactly about the lab but it is about chlorophylls and...

Hi for biology we had to do a lab which we separated the plant pigments by chromatography of spinach. We used a solvent of 90% petroleum ether:10% acetone. After we did the experiment we ran out of time in class so the teacher went and recorded everyones results on there paper. The problem with...

I often use Spectrum Analyzers to probe RF signal powers at different points on multilayered PCBs. These probes have a single conductor (or at least only require a single conductor). Placing the probe on a signal trace on the top exposed surface of the PCBs instantly shows us the RF power at...

I have to certify one of my product which used in industrial pannel boards for EMI/EMC this contains only capacitors and resistors. can anybody help me in what all teas i have to do for this? and one more thing is it necessary to do RF disturbance test on this product? and What is RF...

I have a question about radio frequency blocking. I recently purchased one of those invisible dog fences to keep the new puppy from becoming roadkill. Pretty basic install except when it came to "blanking" out an area for the dog to go into and out of the area. The instructions said to run two...

Here is a real brain teaser that has always baffled me. Years ago, back in the bad old pre-cable days of cheesy TV antennas, I was watching something of interest and, since I was working around the house, I had both of our TV sets on the same channel for optimum viewing from any location. I...

Since RF radiates from a antenna when you key up the transmitter.and since RF is hypothesized to be photons that account for the electromagnetic particle that tranfers EM waves.when a current hits the antenna,what if electrons since they flow into the antenna,are converted into photons,and...