Re: Why are restaurant RF gizmos so complicated?




Joerg wrote:

>Yesterday good friends invited us to a brewpub that doesn't take
>reservations but is very popular. So they have these RF doohickeys that
>flash and vibrate when your table is ready. This one was clear plastic
>and I scoped out what's inside. It was mind boggling:
>
>Two chips, three (!) crystals, one resonator, one 455kHz IF filter, lots
>of SMT transistors, caps, resistors and what not, plus two NiMH or
>similar cells.
>
>Why on earth are these so complicated? I mean, all they have to do is
>receive a coded RF signal over a couple hundred feet of distance, then
>decode it so only the one whose table is ready rings. Can't be more
>daunting than a garage door opener design, can it?

Garage door opener; high volume, low profit margin. Reduces cost
per unit even if this makes development costs higher.

Restaurant pager; low volume, high profit margin. Reduce development
cost per unit even if this makes cost per unit higher.

.

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