Hi guys

I don't understand why a pager (or other RF devices) can achieve long battery life, and a pager needs to listen to the incoming signal all the time, while only powered by one AAA battery.

I can understand a RF device doesn't need to listen all the time, only need to wake up like a few mills seconds per second. Does that mean a paging transmitter needs to broadcast the same data many times over a long time (say 1s) to make sure a pager can receive the data?

 

Hi guys

I don't understand why a pager (or other RF devices) can achieve long battery life, and a pager needs to listen to the incoming signal all the time, while only powered by one AAA battery.

I can understand a RF device doesn't need to listen all the time, only need to wake up like a few mills seconds per second. Does that mean a paging transmitter needs to broadcast the same data many times over a long time (say 1s) to make sure a pager can receive the data?

Yes, the transmitter is a line-powered broadcast transmitter so it's not particularly concerned about power usage and can broadcast more or less continually.

 

Hi guys
I can understand a RF device doesn't need to listen all the time, only need to wake up like a few mills seconds per second. Does that mean a paging transmitter needs to broadcast the same data many times over a long time (say 1s) to make sure a pager can receive the data?

True. I've got a two way work pager. That thing eats batteries when transmitting a reply.

 

Thanks guys, I was excited a bit that I can find a RF device that can listen all the time but also have a long battery life. But it sounds like this feature come with big compromise.

Is there anyway to get around this?

 

Thanks guys, I was excited a bit that I can find a RF device that can listen all the time but also have a long battery life. But it sounds like this feature come with big compromise.

Is there anyway to get around this?

Nope.
You just design it to use as little power as possible, and then listen only as long/often, as required to receive the data you want.