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[kevinvinv]

I have a Leviton HCA02 repeater/phase coupler installed in my breaker box.    I also have one of those bar graph X10 signal strenght  meters...  If I push the TEST button on the HCA02 it begins sending ON/OFF commands repeadly.

Next I connect the bargraph signal strength meter across the Levition HCA02 wires to observe the signal strength right at the source...  I get like 100mV of signal there.

Seems a little low wouldn't you think?  Any ideas?  things were working OK for awhile and then gradually things stopped being reliable... I am wondering if this coupler went bad or something else happened... 

What a pain.

[Brian H]

100mv is low in my opinion. I would think at the outputs more in the 4 to 5 volt range. I believe many modules are a minimum 100 mv.
Are both lines that low?
Can you test it by letting it cool off and then try it as it warms up? If it get worse it is dying.