Post Your Mystery Frequencies

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SOFA_KING

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You are right i forgot to take the N off, its FFF, so far i have logged them on,

164.0625
164.6500
164.6625

In kansas city missouri.

164.6500 is well known USSS Tango, and USSS uses NAC 001. If you are picking this FFF up on all of these freqs in a small area (1 - 3 miles), it might be an image if something else. I was fooled once like that in Boca Raton, FL when a strong CG P25 data freq in the 150 range popped up on several freqs in the 164 range on my GRE scanner. Once I found the real freq with the same NAC I was able to understand it was an image. These scanners are not perfect, and you can't always trust what you hear. ;)

Phil :cool:
 

CqDx

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$FFF is a bit unusual, I have captured it on my log from time to time on my PSR-500, but never any audio. That's why I think those are false hits.

But then again, $FFF is a valid NAC code so it is possible.
 

ChrisP

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$FFF is a bit unusual, I have captured it on my log from time to time on my PSR-500, but never any audio. That's why I think those are false hits.

But then again, $FFF is a valid NAC code so it is possible.

So how often does everyone run into "false" NAC decodes? I've been running a lot of search longs of federal frequencies and may log dozens of hits with what should be the known, correct NAC, but then I always seem to have one or two hits logged with weird NACs, like $000.

- Chris
 

ecps92

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When it is a real weak signal, it might false from time-time, very rare tho with the latest Firmware

So how often does everyone run into "false" NAC decodes? I've been running a lot of search longs of federal frequencies and may log dozens of hits with what should be the known, correct NAC, but then I always seem to have one or two hits logged with weird NACs, like $000.

- Chris
 

SOFA_KING

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So how often does everyone run into "false" NAC decodes? I've been running a lot of search longs of federal frequencies and may log dozens of hits with what should be the known, correct NAC, but then I always seem to have one or two hits logged with weird NACs, like $000.

- Chris

Yes, like Bill, I get them too on very weak signals. I have gotten the NAC 000 a couple of times. I even saw it on the scanner display! No FFF yet. The biggest problem with the GRE line is the NAC carry-over issue on weak hits. Say you get a solid hit with NAC 001, and then your next scan frequency stop is on a weak P25 signal where the signal is not strong enough to decode the NAC. In many cases like this I have seen the previous NAC (001 in this case) get recorded even though it is not the true NAC. When you look at the log you can usually tell because it is sequential, but you could be "duped" if you were not questioning the integrity of the data. I wish WIN500 logged the signal level as well. That would help the suspect false hits be more visible.

Phil :cool:
 

ChrisP

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Yes, like Bill, I get them too on very weak signals. I have gotten the NAC 000 a couple of times. I even saw it on the scanner display! No FFF yet. The biggest problem with the GRE line is the NAC carry-over issue on weak hits. Say you get a solid hit with NAC 001, and then your next scan frequency stop is on a weak P25 signal where the signal is not strong enough to decode the NAC. In many cases like this I have seen the previous NAC (001 in this case) get recorded even though it is not the true NAC. When you look at the log you can usually tell because it is sequential, but you could be "duped" if you were not questioning the integrity of the data. I wish WIN500 logged the signal level as well. That would help the suspect false hits be more visible.

Phil :cool:

Thanks Phil. That's exactly one of the things I noted on my WIN500 log files...

- Chris
 

seligman

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Does anyone know why NOAA weather on 162.550 is also broadcast on 419.100 in the Los Angeles area?

MUCH, MUCH weaker signal, but it's there.
 

seligman

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Tonight I listened to the VHF federal band from the Los Angeles area.

Some of this is Tijuana Police, but I don't usually hear Mexico this well. I am 125 miles north of the border. Perhaps somebody more knowledgeable than me can separate the Mexican from the US stuff.

Every frequency was 100% Spanish, except for the two without voice traffic.

163.000, PL162.2
164.200, PL131.8
164.200, PL103.5, beeps or squelch tails only (no voice)
164.6375, PL71.9
165.000, PL97.4
165.025, PL85.4, PL162.2, DCS072
165.075, DCS065
165.125, PL186.2
166.100, PL151.4
166.125, PL151.4
166.300, PL151.4
166.425, PL151.4
166.525, PL151.4
166.575, DCS606
166.800, PL151.4
166.925, PL100.0
167.750, DCS023
169.425, PL141.3, data (no voice)
 

trainman111

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Anyone have anything for 168.7625 $083 (or maybe 168.75 or 168.775)? It's 5X5 just south of Richmond and 100% encrypted. The further south I go, the weaker it gets, so it must be coming from the Richmond area. It's been rumored that this is an ICE repeater that is also linked with repeaters in Washington, D.C. and Norfolk, VA. Does anyone have any other info that could confirm this usage or rule it out?
 
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SOFA_KING

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I have nothing on that, but ICE was my first guess. They are popping up in different areas on new frequencies with all sorts of different NAC codes. I can't see any pattern that would indicate a "national" reuse of frequencies.

I will be in that area in a few days. The scanner will be with me!

Phil :cool:
 

trainman111

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We'll they certainly like to talk. They are active at all hours of the day. I was coming back from a trip around midnight a few nights ago, and they were active as ever. The repeaters almost definately have to be linked because there is no way that Richmond area ICE units are doing that much talking. It'd be interesting to see how big the region is that these units operate in.

Enjoy your visit in VA, there's plenty to see and do. And most importantly, let us all know if you find more freqs that aren't in the database. I'm always looking for more to program!
 

SOFA_KING

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We'll they certainly like to talk. They are active at all hours of the day. I was coming back from a trip around midnight a few nights ago, and they were active as ever. The repeaters almost definately have to be linked because there is no way that Richmond area ICE units are doing that much talking. It'd be interesting to see how big the region is that these units operate in.

Enjoy your visit in VA, there's plenty to see and do. And most importantly, let us all know if you find more freqs that aren't in the database. I'm always looking for more to program!

Thank you, I will. :)

What you might be hearing is the "test phase". They did that here in (north) Florida, and it was a huge amount of encrypted traffic, day and night, for a while. One day someone turned off the encryption and I got to hear the type of testing they were doing. Most of it was location testing. The system sends out muted data (with the same NAC) broadcasting the location of each unit. There was much talk about seeing the location of all units who were "on" and even one that was OFF! Activity now is back to normal, so the team that was testing most likely moved on.

I'll keep an eye on that freq! And logging will be running 24x7. :D

Phil :cool:
 

trainman111

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That would make sense. I sat on that frequency for about 20 minutes and every minute or two, I would get a signal strength of 5X5 with the same NAC, but there was no audio.

Also, check your PM's.
 

BigC801

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Found a new one,

170.1625 NAC 399

I have nothing for that one. What are you hearing on it?

Phil :cool:

On 170.1625 N399 i haven't heard anything yet. but on 170.7500 i have also found that same NAC 399 with voice. normally around here 170.7500 is NAC 293 with US Marshals. Just tonight i also logged a NAC of 4CC on that same freq.

For some reason the UHF has lit up tonight,

406.5625 N191
406.1625
407.2500 N194
407.1625 N192
408.1625 N191

and several other ones with a NAC of 100 that i know go to a trunked system.
 
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