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  #1 (permalink)  
Old 07-05-2017, 7:11 PM
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Default 446.1

I use 446.1 for simplex comms and found some digital packets. I am currently on a trip to Ontario and found the same digital signal. I doubt it is Amatuer hence it beening (probably unlicensed, at least for Amatuer) the signal is ~0.75s of tone followed by a data packet (very quick) and the signal goes off air. Does anyone know what it is?
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Old 07-05-2017, 11:15 PM
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I didn't find any licensed users in Canada on that frequency. There are licensed users but generally around 440 and 445. Could be bleed over aka intermod.. Or someone has set up APRS on that frequency. Or Yaesu GM. Yaesu GM is fairly consistent at beaconing every 15 secs. But then if more than one Yaesu using GM it could be more frequent.
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Old 07-06-2017, 6:46 AM
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A lot of surveying equipment uses frequencies in the UHF amateur band.

Check around and see if anybody is doing any surveying.
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Old 07-06-2017, 7:00 AM
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Was going to post the same, and a link [but can't find it] to a prior thread from Canada on the same topic where it was getting into the Repeater input

See if it matches the signal
Digital*Modes*Samples to the GPS RTK

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Originally Posted by MikeOxlong View Post
A lot of surveying equipment uses frequencies in the UHF amateur band.

Check around and see if anybody is doing any surveying.
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Old 07-06-2017, 10:47 AM
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Yes it is GPS RTK
Thanks ecps92
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Old 07-06-2017, 11:07 AM
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Glad to Help, now enjoy the Fox Hunt to find the culpret
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Yes it is GPS RTK
Thanks ecps92
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Old 07-07-2017, 6:48 PM
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Could be anything. Amateurs have secondary allocation in the 70cm band.
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Old 07-15-2017, 2:20 AM
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On my side of the border we can't use below 440 because you guys have something on primary military or LEO , we use 6.125 for a lot of simplex and I have an openspot on 6.175 but you definitely are not hearing from my equipment and I don't hear the signal you are referring to on this side of the lake .

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Old 07-15-2017, 11:50 AM
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Quote:
Originally Posted by wrath View Post
On my side of the border we can't use below 440 because you guys have something on primary military or LEO , we use 6.125 for a lot of simplex and I have an openspot on 6.175 but you definitely are not hearing from my equipment and I don't hear the signal you are referring to on this side of the lake .

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I'm assuming you are in the US, in the border zone, that being said, there is very little for LMR between 430-440MHz, however between 403-430MHz in Canada is filled with typical LMR users. Commercial, SCADA, and public safety.

There is LMR users below 430MHz in the US along the border zone, where US hams are not allowed to use 420-430MHz.

RTK users in Canada are typically assigned about(on a mobile device and can't check TAFL for the bottom and top channels)16 channels with an 8 block between 440.0000-440.6000MHz and an 8 channel block between 445.0000-445.6000MHz. All these users that I have found are 25KHz channels and usually licensed Canada wide. The 430-450MHz band, in Canada, is assigned as primary for Geolocation (RTK ect.) and Amateur as secondary users.

You will find some companies that will operate on unlicensed channels anywhere between 430.0000-470.000MHz.(older Pacific Crest PDL radios come in 2 splits, 430-450MHz and 450-470MHz) the new Pacific Crest Vantage ADL radios come in a 403-473MHz band split).

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Last edited by kayn1n32008; 07-15-2017 at 11:54 AM..
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