| Author |
Message |
    
Bigbob
| | Posted on Sunday, July 27, 2003 - 9:41 pm: | 
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What is a spur in radio lingo? |
bruce
| | Posted on Sunday, July 27, 2003 - 10:22 pm: |
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A spur is a product of either the transmitter or sometimes the receiver which shows up as a signal somewhere its not supose to be ....... a unstable transmitter or non linear stage can cause these.
Spur's can be very large and some realy bad linears produce them in large numbers ..... i tested one that had so many that it looked like a chrismas tree spread out over a 5 mhz bandwith dozzens of them ...... now when the input was cut way down they were gone ...... hummm it became linear. The old 6146 cross nutralized amps were BAD at parisitic osc and were very dirty you could count spurs across the band on 6 ... one of my pet peevs. Spurs almost never are found in a good linear stable transmitter ..... i ve never seen them even in class c if it is stable they will not be a problem although the IMD does go up in CLASS C you can keep it low. The UHF transmitters i work on all day are at least -40 db outside of the main signal not bad for a board less then 1/4 sq foot! |
Bigbob
| | Posted on Tuesday, July 29, 2003 - 6:27 pm: |
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I read about it at chipswitch.com,regarding it putting out spurs at 15 meters,so they passworded the proscessor to block it. |
Tech833
| | Posted on Tuesday, July 29, 2003 - 9:24 pm: |
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'Spur' is short for 'spurrious emission'. For the tech's, a series of spurs on the spectrum analyzer would be referred to as 'lawn'. |
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