Lake Co. Fl.

[gcr33]

This is a rehash of an older thread. Did any one find the correct NAC for their digital system?

 

[james32746]

NAC code is 104

 

[gcr33]

Thank you for the reply. Wonder why they did not stay with 293?

 

[MDFR_TCOMM]

Maybe because 293 is the default and easy to hack in their system. Gene, all our NAC's are inverted to prevent just that.

 

[UFEMTFF]

Why does someone want to know what the NAC code is anyway? Why's it useful?

 

[ctrabs74]

Why does someone want to know what the NAC code is anyway? Why's it useful?

The newer GRE scanners, IIRC, are capable of programming NAC codes to prevent picking up other systems that operate in analog mode on the same frequency (I think I've explained that correctly; if not, I'm sure someone can correct me). It's similar to the way PL/DPL tones work.

 

[bravo14]

Does BCD996T pick up NAC? just wondering.

 

[UFEMTFF]

The newer GRE scanners, IIRC, are capable of programming NAC codes to prevent picking up other systems that operate in analog mode on the same frequency (I think I've explained that correctly; if not, I'm sure someone can correct me). It's similar to the way PL/DPL tones work.

That makes sense. I hadn't actually looked at the DB for Lake County. I was thinking it was 800/Digital/Trunking. Now that I know its VHF/Digital/Conventional that makes perfect sense.

 

[jeffmulter]

>> The newer GRE scanners, IIRC, are capable of programming NAC codes to prevent picking up other systems that operate in analog mode on the same frequency

Actually, GRE didn't have to enable the PSR 500 and 600 to actually decode the specific NAC code to enable the scanners to discern analog from digital. The Uniden 996 does that by being able to set a conventional channel as "digital."

The real advantage of being able to select the NAC code is that some digital channels are used with multiple NAC codes. For instance, at those airports where TSA communications are digital, you're likely to find more than 1 NAC in use on 172.900 MHz. Each NAC represents a different usage for the same frequency. TSA radio users using NAC code "A" won't hear users using NAC code "B" ... and visa versa, unless someone is in scan mode.

Bottom line is to not assume that only one NAC code is in use on a digital conventional channel.

 

[bravo14]

I wasn't too sure if the 396/996 was able to pick it up. I have try that once and nothing picked up did as a test it. Nothing in my area is digital expect the counties around me but they are 800 and so on. I do not see any NAC numbers in 996 I see Digital and Analog.

 

[jeffmulter]

>> I do not see any NAC numbers in 996 I see Digital and Analog.

I think you misunderstood my post, Bravo. I did not say the 996 had the ability to decode NAC codes.

The original post I was replying to mentioned that the new GRE models had NAC decoding "to prevent picking up other systems that operate in analog mode on the same frequency."

I simply stated that the same result could have been done by offering a "digital" mode setting for conventional channels - like on the 996 (this feature is not available on the 396, if I remember correctly).

The beauty of actually being able to read - and program - a NAC code comes when you find an agency using more than one NAC code on a particular frequency.

 

[W4KRR]

Does BCD996T pick up NAC? just wondering.

No, only the GRE PSR-500 and PSR-600 make use of NAC codes.

 

[bravo14]

Wonder if 996 will come out with a firm ware for that. I would hate to buy another unit if we go digital here..

 

[W4KRR]

Wonder if 996 will come out with a firm ware for that. I would hate to buy another unit if we go digital here..

I would doubt it. Usually a firmware upgrade improves on existing features rather than add additional capabilities. If you could just keep on upgrading your radio with new features, you would never buy a new one!