Re: Lamp module causes noise??

[nobody@xxxxxxxxxxxx (Dave Houston)]

Ooops! The "75-100µS" had a misplaced decimal. It should be 7.5-10µS.

nobody@xxxxxxxxxxxx (Dave Houston) wrote:

>A lamp module should neither put excessive noise on the line nor eat all
>120kHz. What was the load? Some CFLs are known to put noise on the line and
>others are known to eat 120kHz.
>
>A lamp module will put a short switching transient on the line. This usually
>consists of about 8-10 cycles of ~150kHz that decrease from 10 or more volts
>to near zero in about 75-100µS.
>
>You can see an example at...
>
>http://community.webshots.com/photo/506490147/506490147qmqcRj
>
>This will not register on the ESM1.
>
>mike2711@xxxxxxxxx wrote:
>
>>Thanks Jack! I figured since it was a "lamp" module that could
>>dim....that it might be the reason for the noise but should the noise
>>be at the 120khz PLC level? Plus it nearly absorbed the X10 signals on
>>the entire circuit when in the "on" position. I mean the Elk couldn't
>>read a valid X10 signal at all! Thanks!