Rebroadcaster for POCSAG paging - questions

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Jay911
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Joined: Wed Mar 06, 2002 4:00 pm

Rebroadcaster for POCSAG paging - questions

Post by Jay911 »

Greetings folks,

My fire dept is venturing into the world of alphanumeric paging at this point, using the original Advisor pagers on a city-owned paging network. That part is fully up and operational, and working fine.

The issue is that our response area suffers from, shall we say, less than total coverage. The topography and such isn't important at this point.. there's a solution that WILL improve coverage - I'm curious about the one component we don't have to complete that solution.

My contacts within the city are receptive (excuse the pun) to us operating a 'rebroadcaster' at our station. We have good reception of the city's POCSAG signal at our station-located tower site, and transmitting from there would cover our area quite decently. (On the same frequency as the existing pager tower sites, I probably should mention.)

The folks at the city are tied up on other more important projects right now, and getting this alpha paging expanded is not a rush to either them or us. So to fill the time I thought I'd try to understand the rebroadcaster concept a little more in-depth.

Is there a commercial device I should be looking for, that'll receive the signal and then "play it back" a few seconds later from our xmitter? Is it simpler than that - just some "black box" to do the same thing?

One of my department's more tech-minded members brought the "K1RFD EchoStation" software to my attention - is that sufficient for our purposes?

Thanks in advance, of course :)
--j.
Al
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Joined: Tue Sep 04, 2001 4:00 pm

Post by Al »

Well, delaying a duplicate page and retransmitting on the same frequency is only an option *if* the paging coverage areas don't overlap. If there is any overlap, the best bet is a simulcast system. While the delayed idea may seem to work, what happens when a second nonrelated page is being transmitted from the city system while your retransmission is occurring? Most likely both pages will be corrupted in some way if the pager receiving them is in an overlapping coverage area.
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alex
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Post by alex »

The county I used to live in ran the same sort of system - except I think they used 5 350w simulcast sites to cover the county.

They are slowly upgrading to 900mhz 2-way paging - 29 recieve sites, and 27 transmitters last I knew.

Additionally - a thought might be - how hard would it be to potentially relocate that transmitter to your location if that's better....

-Alex
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