If we're referring to SAT reception then there actually IS such a thing as an LNB (the thing you connect the cables to on a sat dish) that's ONLY capable of analog reception, BUT these have been off the market for quite some time AFAIK.
To explain: there's a 'low band' and a 'high band' - low band includes analog as well as digital stations, high band only includes digital stations. If your LNB only supports low band - we're talking ancient stuff here - then obviously it's not fully capable of digital reception. Hence, why you see LNBs marketed as 'universal' nowadays. It means they can receive both bands
To verify whether an LNB supports both modes check the tech details that are usually printed on it:
10.70 - 11.70 GHz ( Low )
11.70 - 12.75 GHz ( High )
So, it's not technically wrong to market something as a digital dish/antenna, especially if you're aiming at people that have had their setup for ages. Apart from that it's marketing, of course.