I have two issues with the EDACS scanning system on my scanner.

First, our trunking system beeps four times after each transmission, presumably to cause non-trunking scanners to lag on the channel and make following a conversation more difficult.  Normally with the pro-92, these beeps are not heard because they are not included by the control channel. (this is a good thing)

I started noticing that I could faintly hear these beeping tones in my scanner when no activity was apparently present. (very faintly audible from the speaker... squelch and volume did not affect the sounds)  I got another scanner out and parked it on a trunking frequency.  I was unpleasantly surprised to hear that occasionally I was hearing traffic on a trunking voice channel on the parked scanner but not on my pro-92. (though the faint beeping was heard)  So it appears that some EDACS conversations are simply being missed by the pro-92.  Some things I checked:  squelch was set just above static level, the control channel was clearly receivable, the bank was open, no trunking channels were locked out.

Second issue... scanning EDACS and other non-trunked frequencies in the same bank.  According to the manual, it says to lock out the data channel.  When I do this with our EDACS trunk, the pro-92 ceases to scan trunked conversations.  I verified this further by parking on the (locked out) data channel, waiting for the display to indicate a conversation, and tap SCAN.  No conversation was heard.  I repeated this at least 15 times, and at times I manually scanned through the voice channels and confirmed traffic.  Once I removed the lockout from the data channel, the pro-92 resumed correct trunk-tracking.  This appears to cause a problem with scanning additional non-trunked frequencies in the same bank.  I turned on my cordless phone and entered its freq into an available slot in the same bank as my EDACS trunk.  It was easily breaking the squelch and received clearly.  When I scanned the bank, the pro-92 would not stop on that channel.  After waiting 10 seconds, the pro-92 did then scan to that channel and stop there as it should.  I then locked out the data channel and found that it would immediately scan to the cordless when I pressed SCAN.  Pressing SCAN again also instantly brougt me around to that channel again.

In summary, it appears that when in trunking mode for EDACS, it will stop on the data channel for 10 full seconds before moving on if it is not locked out, but if you lock it out it will not track EDACS at all.  This is a good waste of a scanning bank, being able to use only 5 or 10 slots effectively.