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[70shovelhead]

Hello everyone. Newbie here so please be gentle....anyway we just remodeled the house and I built 2 new media closets to house the DVR/Satellite, surround sound and DVD player in the living room and the master bedroom. After shopping around I purchased the X10 PM5900 to control the devices in the living room media closet. Works perfect and haven't had any problems. Then after completing installation of the master bedroom devices( DVR/satellite, and DVD) I purchased another PM5900 to control these devices. Now the problem is when I operate the remote in the bedroom to control that system the TV in the living room also reacts to the bedroom remote. For example when we go to bed at night and have turned off all devices in the living room media closet and the TV is off, when I turn on the bedroom TV the living room TV also turns back on. I have tried relocating the 5900 transmitter but nothing changes. The two media closets are about 50' from each other as the crow flies.
So....is there any solution to this problem ie. is it possible to change frequency of the transmitter? Do I need to incorporate an RX569. If so how? Reaching out here and what a great site!!

70shovelhead

[dhouston]

I have no clue about the innards of current Powermids.

If they have separate RF transmitter modules (within the transmitter unit) and receiver modules (within the receiver unit) then changing the frequency is possible by replacing these units. The Powermids use 418MHz (unless newer ones have changed).

Are there FCC ID numbers on the units? If so we might find schematics and internal photos that will answer the critical questions. Otherwise, you'll need to open them up which might void any warranty you may have.

[Tuicemen]

Sounds like you have the same brand entertainment devices in both locations.
Since the Powermids use RF to talk to each other It may be possible to block the RF from reaching the other powermids in the oposite location.

Since metal objects will reduce the range of a RF signal I'd try some aluminum foil or some large metal between the line of sight of the two transmiters and oposite receivers.
This may take some experimenting with transmiter and or receiver locations as well as the metal signal blocker
The RX569 may help in this instance as it might allow you to get one of the receivers out of the line of sight of the offending transmiter.

[Brian H]

I checked the FCC Database.
Both the Transmitter B4SST539 and Receiver B4SRE549 are there but there is no publicly accessible data. Just the frequency of 418MHz is listed.

[dhouston]

There are 315MHz & 433.92MHz (as well as other frequencies) transmitters and receivers readily available and reasonably priced but they will be of no use if X10 integrated these functions into SMD PCBs. And, even separate through-hole modules require some DIY abilities and soldering skills.

And, I suspect trying to erect a shield will be both time consuming and futile.

[70shovelhead]

Thanks for the replies. I have made several adjustments in placement of the transmitter, antenna, shielding material between the transmitter in the bedroom and the receiver in the living room media closet with no change. What is strange about this whole thing is that the remote that is causing this problem is a directv remote programed for an Olevia TV (bedroom) and it is turning on and off a Samsung smart TV (living room) .
So I am going to try a Sewell IR blaster that works through the HDMI cable (http://www.amazon.com/gp/product/B00CA7EKHK?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00). This looks like an easy fix for the bedroom system since the media equipment is located on the other side of the wall from the tv and is accessible through a wall port I installed. Again thanks for the input.

[Tuicemen]

Have you tried the factory remote for the Olevia TV to see if it too has the same effect?
Can different codes for devices be programed into the directv remote (entered with keypad) or is it a learning type?
If it is possible to enter different codes try others as some codes overlap with other brands of devices.

[dhouston]

So I am going to try a Sewell IR blaster that works through the HDMI cable...

That does look like a fix. Let us know how things work out.