Kevin,
In a trunked system you will have a bank set up for the frequencies in that system. These are (typically) the xxx.xxxx. The big selling point of the trunked systems is you can then assign "talk groups" for each specific service. In reality, you can assign more talk groups than frequencies in the system.
So going from a conventional system where the police might have four frequencies and the fire dept one or two. You can now have ten talk groups for the police and ten for the fire dept. The ten PD might allow a dispatch and a talk or info channel for each district where in the conventional system they were on one single frequency. The FD can have more than one fire ground talk group or set up a talk group for the medics only.
Talk groups are the three, four or five digit numbers you will see with the scanner doing a search for the talk groups. Normally a three digit talk group is the decimal version of the talk group in an EDACS system. These talk groups can also be displayed as a XX-XXX value called an AFS (forget what it means right now and too lazy to look it up).
In a Motorola trunked system, the talk groups tell you whether you are dealing with a Type I or Type II system. Type I talk groups are recognized by the XXX-XX structure. A Type II system has talk groups of XXXXX. Type II systems are easier to program than Type I's because you don't have to deal with a Fleet Map. The RR data base has the fleet maps for the Type I systems I've seen listed. The owenrs manual tries to explain these and there is a discussion on this site.
So once you have entered your frequencies for the trunked system. Make sure you have set the input to be trunked or you can't enter talk groups. For the Pro-94, if you press the Pgm, then the Trunk and then the Func keys, (if memory serves me well) you will be in the area where you can eneter your talk groups.
So before you start entering anything, you will need to know the type of system you are going to be listening to. EDACS and Motorola (the only two the 94 can scan) are set up differently. Then within Motorola, you'll need to know if you're a Type I or II system (remember the fleet map thing). In EDACS, the frequencies MUST be entered in a specific order, Motorola doesn't really.
If you follow the instructions, they are pretty good at getting you set up. Once you understand the various pieces. Hope this helped a bit.
