SDS100/SDS200: Help Mapping Out An IDAS System

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JASII

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There is an IDAS system near me that I want to map out. Here is what I have done, so far.

I have monitored the frequencies, conventionally in Custom Search, and here I what I get:

461.575 IDAS/NEX4 Sys ID: 1h TGID: 0-0 (RSSI: -91/-92/-93; the blips are 3 seconds apart)

463.775 IDAS/NEX4 Sys ID: 1h TGID: 0-0 (RSSI: -87/-88/-89; the blips are 3 seconds apart)

464.075 IDAS/NEX4 Sys ID: 1h TGID: 0-0 (RSSI: -87/-88/-89; the blips are 3 seconds apart)

464.450 No signals


I suspect that this is a quiet site and there simply isn't much, or any, traffic on the holiday weekend. If I program these four frequencies once with IDAS Area Code 0 and once with IDAS Area Code 1, will I be able to hear any voice traffic while monitoring conventionally? Also, if 464.450 is still an active frequency for that system, at that site, should I see and hear the same things on it as I do the other three frequencies?

I have programmed those frequencies in a NXDN One Frequency Trunked system. I haven't heard any communications, yet, while monitoring that way. Does NXDN One Frequency Trunk work on an IDAS system?

Finally, I have programmed and tried monitoring this system as a NXDN trunked system, but my understanding is I need all of the LCNs to monitor that way. I have used the LCN Finder and the only LCN I have found, so far, is LCN 1 for 463.775. Are LCNs for IDAS systems just a single digit? (I know that the LCNs for a nearby NXDN trunked system are three digits.)

I have also ran the System Status function. It displays System ID: 00001h Site ID: 0003 Area: 0 for the first three frequencies. Nothing is displayed for 464.450.

This is the FCC license. I am interested in the West Saint Paul site. The Radio Reference database here only shows 464.075, but I think there are more frequencies used in the IDAS mode at that site.

The FCC license shows eight FB6 stations at that site. There are multiple emissions listed in the license information. I think four of the frequencies are in use by their LTR system there and the other others are for the IDAS system.

Anyway, what else should I try at this point? Should I simply wait until tomorrow to see if there is activity? It sounds like I must have the LCNs for follow this and the best way to get the LCNs is to use the LCN Finder function.



 
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sonm10

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To be honest, not sure why you like one-freq, but to each his own, I suppose.

Some trunk systems, not sure the reason, can only find lcn with voice activity.

I would setup as nxdn trunk and run lcn finder for a couple of days or possibly a week, especially if it's a slow system.

Just curious, was the tgid 0-0 voice or data?
 
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