Re: X10 Interference from the Cellet Cellphone Charger

["Jeff Volp" <JeffVolp@xxxxxxx>]

"Jeff Volp" <JeffVolp@xxxxxxx> wrote in message
news:PikLi.150415$ax1.143479@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> "Dave Houston" <nobody@xxxxxxxxxxxx> wrote in message
> news:46fec395.31012406@xxxxxxxxxxxxxxxx
>> "Jeff Volp" <JeffVolp@xxxxxxx> wrote:
>>
>>>The XTB-IIR AGC totally rejected the noise from the unit under load, but
>>>occasional "1" bits were detected when the unit was unloaded.  I never
>>>saw
>>>the XTB-IIR respond to the noise as a valid X10 signal.  However, it is
>>>interesting that the ESM1 gave a solid a "Good" indication when the unit
>>>was
>>>under load.
>>
>> The X10 Good LED only checks for 9 ones and 9 zeros so something like
>> 1110111111111000000000 or 1110000000000111111111 might cause it to light.

Thinking more about the ESM1 rather than the XTB-II, I believe that uses
envelope detection.  I guess it depends on where it samples the envelope.
If the ESM1 ZCD is slightly skewed to one polarity, it might catch
alternating 1's and 0's.  That doesn't explain why that green LED stayed on
most of the time, since the start pattern needs three 1's in a row.

Jeff