From: Steve Haehnichen <s-misterhouse@tr...> - 2003-07-29 10:42:09
I've been trying to find the best X10-RS232 interface for use with
misterhouse, and have found some interesting variations in the
powerline signal sent by each of:
- LynX-10 PLC from Marrick Ltd.
- The ubiquitous X10 CM-11A
- ADICON 2500 CPU-XA (PSC05)
Here are the captured waveforms from each using a ScopeTest2
oscilloscope adapter from ACT Solutions:
In summary, the LynX-10 PLC (or maybe just my unit) has real problems
with both transmit signal strength and 'dampning' of other signals.
I was really hoping this transmitter would shine, since I like the
protocol and misterhouse support. Unfortunately, there are many
receivers it simply can't reach where the CM-11A had no trouble.
I'm convinced the LynX-10 PLC also has a software bug concerning the
Tx signal level. If you have one, compare the difference in range
between 93% Tx power and 95% Tx power. Above 93%, the transmit power
drops by HALF. Marrick has not yet replied to inquries about this
behavior. Mine will be returned for a refund, since I really need the
extra punch to get through a passive phase coupler.
I'd like to try a PowerLinc RS-232 interface to compare as well, or
even try to find out what a 'BoosterLinc' really does. If anyone in
San Diego has one to lend, I'd be happy to post the results.
I also intend to compare the Signalinc with the Leviton blocking
coupler -- two passive couplers that claim to be the best. :)