RFI and RF compatability

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foxkid
Posts: 26
Joined: Fri Oct 02, 2009 1:23 pm

RFI and RF compatability

Post by foxkid » Fri Oct 02, 2009 1:59 pm

I am an amateur radio operator, and am sensitive both to sources of RF interferance with my radio communications, and with the possibility of disrupting a devices function when I transmit at high power levels.

I see from the OOMA web site that some form of digital network protocol is used over the phone wiring between the HUB and the SCOUT. Are there technical details available about this protocol, such as the spectrum used and power levels?

Also, to what standards are the HUB and SCOUT built to reject interference from other sources? To what frequencies might they be most susceptable?

Best Regards,

Carl, K1UZK

niknak
Posts: 885
Joined: Tue Jan 27, 2009 7:53 pm
Location: Staten Island, NY

Re: RFI and RF compatability

Post by niknak » Fri Oct 02, 2009 2:02 pm

the digital signalling is HPNA
i believe it is some kind of Frequency Division Multiplexing, I'm sure you can find much info about it on line

foxkid
Posts: 26
Joined: Fri Oct 02, 2009 1:23 pm

Re: RFI and RF compatability

Post by foxkid » Fri Oct 02, 2009 2:05 pm

Thanks, I'm googling it.

foxkid
Posts: 26
Joined: Fri Oct 02, 2009 1:23 pm

Re: RFI and RF compatability

Post by foxkid » Fri Oct 02, 2009 2:08 pm

To quote from the ARRL web site: (Americal Radio Relay League)

HPNA networks computers within a residence or business using existing telephone wiring. The HPNA specification includes spectral protection for the present HF international amateur bands within its frequency range of up to 9.5 MHz. Dr Strauss noted that this protection was originally proposed by individuals within HPNA and that ARRL's participation and cooperation was an important part of the committee's decision to offer more protection to the Amateur Radio Service than was required by the radiated emissions limits in Part 15.

Good answer.

-- Carl, K1UZK

murphy
Posts: 7172
Joined: Tue Jan 27, 2009 12:49 pm
Location: Pennsylvania

Re: RFI and RF compatability

Post by murphy » Fri Oct 02, 2009 2:10 pm

The hub and scout communicate using HPNA. The specifications for HPNA should be available on the internet. There are only a few companies that make the chip sets that implement HPNA. HPNA is a standardized protocol.
Customer since January 2009
Telo with 2 Handsets, a Linx, and a Safety Phone
Telo2 with 2 Handsets and a Linx

niknak
Posts: 885
Joined: Tue Jan 27, 2009 7:53 pm
Location: Staten Island, NY

Re: RFI and RF compatability

Post by niknak » Fri Oct 02, 2009 2:13 pm

sounds like the ARRL was right on top of it! good luck! and welcome to ooma

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