rjm, while scanning press "MAN" , then try to press "PGM" then "F2"(Edit) then "F2"(Current)
your should see the cursor flashing after "Scan Lists" if so press the "down arrow" and "select" keys
Now the top line heading should read "Trunking Systems" and the cursor should be flashing after "type"
Is your mode type set to "P25 Auto" ? If not maybe toggle that option by stepping through the right arrow key
until you do see the "P25 Auto" type of "TSYS" (Trunking System) then press "F1" key twice to save changes.
Now for the big test or the big fail ? It's time to press the "SCAN" key to scan what you have programmed.
Also many sure you have Scanlist 1 enabled or else you will see "Nothing Enabled".
In lQQking at those system links for your Philadelphia Co, PA you would need a GRE PSR-800 w/ updates for P25 TDMA Phase II
so your trusty Pro-106 cannot track this new type of trunking system. Is this the system you currently have loaded with ARC500 ?
I say try to program in your other digital Philadelphia Co, PA 800 Mhz P25 Smartzone Phase I system into a different scanlists:
BIG NOTE: When I see freqs like 866.xxxx to 868.xxxx it makes me wonder about if your system has been or will be rebanded
down 15 Mhz to 851.xxxx to 853.xxxx frequency ranges ? Tell Everyone which P25 TSYS that you have programmed in
and are seeming to get plenty of signal strength ... ps remember the "T" you do see while your scanner says "Scanning" 1 etc.
I say enter this system in it's own scanlist like Scanlist 2: and only the FD talk groups for now: ( I do see some "E" encrypted Tac TG's )
001 (1) FD / PW system (Zone-1) 866.28750 866.36250 866.83750 867.06250 867.08750 867.56250 867.58750 867.86250
868.06250 868.08750 868.28750 868.58750 868.78750 868.81250c 868.83750c
I say enter this system in it's own scanlist like Scanlist 3: and only the PD talkgroups for now: ( All the PD TG modes just say "D" Hmm)
002 (2) Police System (Zone-2) 866.10000 866.33750 866.58750 866.68750 866.78750 866.80000 866.81250 867.10000
867.11250 867.35000 867.57500 867.81250 867.83750 867.93750 868.05000 868.31250
868.33750 868.53750c 868.55000c 868.56250a
ps It's a huge learning curve and you need some input from another hobbiest with boots on the ground the in Philadelphia Co, PA.
btw ~ Any as RomeRon also said, some big guns never hurt either

Use your Arc500 to help you layout your Catagories/ ie Scanlists.
While your Pro-106 is scanning it wold also lQQk GREat if you text tag labled the Scanlists to match the agencies and their TG's
ex: Scanlist 1 was labeled "Philedelphia FD" and Scanlist 2 was labeled "Philidelphia PD" and you group to fit your interests !
Also, you could really walk on the wild side and have the LED glow red color for FD TG's and blue color for PD TG's etc.
Down here I have my SO TG's in Gold and my Feds in Pink and our Military TG's are in Green and TV Media in White, etc.
Using this scheme, you know in a nano second what type of traffic your scanner is stopped on even if the volume is low, etc.
Gotta Run,
Michael-SATX