Re: x10 Help

[Frank Mc Alinden <Frank.Mc.Alinden.2xm2bm@xxxxxxxxxxxxxxxxxxxxxxxxxx>]

Hi Guys

>My HomeVision controller arrived today sans power supply (everyone's
missing
>a wallwart, it seems) but apparently the PS from an old LPT
auto-switch box
>(from the days before home networks) fits and it powers up. Now to
figure
>out the version of the motherboard and PROM. It responds to IR and
puts a
>screen up on the TV, so at least it's not DOA. I'm going to check it
out
>with a TW-523 before I try it with the XTB-II.

Hopefully you have a 1203c motherboard ...?? Just watch plugging in the
tw523 ;-)....(dont bend pins like i did)  ....Also ensure you get a
decent regulated  9v power supply...........Its a great Controller IMO
......

>I'm not sure what you mean. The 120kHz bursts sync to the ZC whatever
>the
>line frequency. The ESM1 detects ZC and measures the amplitude of the
>signal
at ZC+500µS.

I thought maybe some sort of multiplier circuitry was used to scale the
60hz ref to 120khz.....


>If you have access to a scope, you can measure the amplitude directly
using
>the RC circuit shown at http://davehouston.net/ESM1-TEST.htm

Thanks for that Dave


--
Frank Mc Alinden