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Re: Off-the-shelf cheap hack 2.4GHz signal source



I have several of the X10 camera and the RF freq drifts pretty badly with
temp. The cameras are located outside so they are always in a changing temp
enviroment. They do make a quick check siganl source and they are pretty
cheap.

Margaret Leber wrote:

> Folks who are looking for a jackleg 2.4 GHz test signal source may need
> to look no further than their own house or local Radio Shack.
>
> I'm currently listening to audio from my VX-5R (tuned to a broadcast
> station) playing though an "X-10 Wireless Audio/Video Sender", beamed
> out our kitchen window to my 16-turn helix and barefoot Millcom
> downconverter. (It's identified on the name plate as "2.4 GHz
> Audio/Video Sender", FCC ID B4SVT30A.  A scrutload of technical data is
> available at http://www.fcc.gov/oet/fccid/ when you query on the device)
>
> My lifepartner Gwennie NG3P picked up a sender/reciever pair to link the
> various VCR/DVD/TV equipment laying about the household for about US$90
> a few years ago. Set to "Channel A", I'm receiving it on an IF around
> 142.840 with my FT-847 set for FM, but the Millicom/X-10 combination has
> been drifting quite a bit. When I first powered up the Millicom it was
> at 142.786. There's also signifcant 60Hz hum in the audio (Which I'd
> been blaming on Gwennie's TV set in the past.)
>
> Possibly useful for gross system-level checkout if you compensate for
> the frequency drift with *frequent* retuning on the recieve side. And
> when you're not using it for that, it can be used to link audo and video
> around your house. Apparently there's also 310 MHz back-channel intended
> to drive IR remote controls, but we've never gotten that to work.
>
> Good thing we don't live in Bremerton, WA, see:
>
>     http://www.bremertonsun.com/news/2001/may/05131keyless.html
>
> 73 de Maggie K3XS
>
> --
> -----/___.   _)   Margaret Stephanie Leber    / "The art of progress  /
> ----/(, /|  /| http://voicenet.com/~maggie   / consists of preserving/
> ---/   / | / |  _   _   _    `  _AOPA 925383/ order amid change and /
> --/ ) /  |/  |_(_(_(_/_(_/__(__(/_  FN20hd / change amid order."   /
> -/ (_/   '  K3XS  .-/ .-/    ARRL 39280   /___ --A.N.Whitehead ___/
> /____ICQ 7161096_(_/_(_/__AMSAT 32844____/ <maggie@voicenet.com>
>
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