4 ms·Bandwidth is key. Transmitting digital signals at high rate would eat up most of the spectrum.by eeZah7Ux 9y agoBandwidth is key. Transmitting digital signals at high rate would eat up most of the spectrum.criddell 9y agoHow were they able to pack so many digital radio stations on FM? Is it because it's higher frequency?Qworg 9y agoYes, definitely. You can think of the trade off roughly as "frequency increases increase bandwidth and decrease penetration/range"exabrial 9y agoUntil you get to x-rays! I've always wondered why this isplanteen 9y agoIf you are looking at xray penetration in the atmosphere, it is very opaque. Almost no xrays get through hence why space telescopes are needed to do xray astronomy.