emission desg. 20K0N0N

[AlphaFive]

Located a new emissions designator I had not run across before. I was looking through ULS pages on 913.0000 MHz. These are listed as very low power and appear on uses such as Interstate truck scales and E-Z pass toll systems. The F.C.C. definition is it's typical general description being wireless data at 20 KHz bandwidth.

 

[nd5y]

N0N is a dead carrier. Those licenses in the 902-928 MHz band with a radio service of LN: 902-928 MHz Location Narrowband (non-multilateration) that belong to transportation related entities are for toll tag readers or scanners for other RFID chips on things like rail cars and shipping containers.

A list of known emission designators is at https://wiki.radioreference.com/index.php/Emission_Designator

 

[AlphaFive]

emissions

Ahhhhhh, explains why I did not see it in the WIKI list. Thanks fer that..

 

[RFI-EMI-GUY]

Those toll readers transmit a sequence of emissions. One if them is a modulated burst to wake up the toll pass, the other is an unmodulated carrier that provides power to the pass and the pass modulates passively a code via backscatter. It has been a while since I worked on those, so the new passive passes might need only unmodulated carrier to operate.

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[K2RNI]

My local steel plant uses those as well at their gate for tracking their trucks entering.

 

[AlphaFive]

RFID

Yes, now all I have to do is search my basement shack to find out where the transmitter has been planted... Kidding, just Kidding.. there's no transmitters here, right?