9Jan/102
I’m looking for a portable radio with good reception. Are digital display radios the same as digitally tuned?
Some radios spec digital display while others spec digital tuned (which obviously have a digital display also). Can a radio be analog tuned with a digital display? Also, do digital radios have better reception than analog?
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January 9th, 2010 - 17:01
portable radios with digital display may still be analog tuned. this is common in the shortwave band sets. in channelized communications, like the AM and FM broadcast bands, digital tuning is faster and more accurate than analog. this is because stations are on discrete steps to begin with. however for general coverage and ham bands, stations are scattered on any oddball frequency so tuning with digital can take more time to scan and must use finer steps (100 hz per step oppossed to 200 khz per step in the FM band). by nature, once tuned in, digital is more stable than most analog oscillators. some digital tuning systems create more phase noise and potential for birdies than high class analog, but otherwise performance is similar. digital is a far better option for recieving regular broadcast stations.
January 9th, 2010 - 17:38
Yes as to both having a digital display. No to both being the same. A digital radio, using a VCO/ PLL type tuner is the latest state of the art and is very stable. However, when it comes to general coverage and Ham radios, I prefer analog, with a good band spread tuner such as my Collins receiver.
Just as a matter of interest: VCO is voltage controlled oscillator and PPL is a phase locked loop circuit.