Bob,
In Waco you would only need a digital scanner for
Texas DPS (see Region 6- Waco, for the relevant frequencies) and ETMC EMS. Anything in blue is a link.
For all the Waco PD and Waco FD see
this link. This is an analog
trunking system that 99% of current scanners can trunk track. For East Texas Medical Center EMS (who serves Waco) see
this trunking system, and specifically the "Site-002 Waco" frequencies, and the McLennan County talkgroups. This sytem is also an analog trunking system, but it will need to be
rebanded soon. This will come in to play when you decide to purchase a scanner as some older analog scanners won't trunk track properly on rebanded systems.
However, ETMC will be switching to a digital trunking system in the near future. If you care to listen to Texas DPS and ETMC EMS then you will need a digital scanner.
Lastly, I wouldn't bet on it, but Waco could very well go to a digital trunking system in the next few years. A digital scanner would be well worth it in my opinion. You can find some great deals online if you're willing to do a little research. First off, read around this site, especially our
Wiki. Here you can find any information you could want about specific scanner models and their specifications (look
here for analog and
here for digital). Once you figure out what scanners fit your purpose look around
Scannermaster for a new one, or watch RadioReference's
Classifieds.