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Alice 5 system dropping signals

PostPosted: Wed Jun 18, 2014 2:48 am
by bislab
I'm wondering if any of you might be having this problem.
We have an Alice 5 system that keeps dropping the REOG channel and on occasion the Thor or Abd line. It doesn't matter if we change out headboxes or use known-to-be-working equipment, it always happens in this one room.
I've tested the electrical line for interference and it tests fine, no over or under voltage, we've tested the powerstrip and UPS it's connected to and even removed those from the circuit. The problem persists. The only thing I can think of is that there is something in the ceiling above (possibly our air-moving system) or something in the wall that is causing some sort of electrical interference. Any suggestions guys? I've even removed the alice base station, plugged it into another room and the problem does NOT follow the base station.

Another Alice question. While trying to track down the problem I also noted that the connector pins on our Alice headboxes are filthy! Does anyone know how to clean the pins or if there is a product for this?

Thanks!

-Bert, RPSGT, system Admin and all-around fix it guy for our lab.

PostPosted: Wed Jun 18, 2014 6:01 am
by somnonaut
Bislab,
Why are you thinking something room related when you tried and found
"I've even removed the alice base station, plugged it into another room and the problem does NOT follow the base station."
Did you plug another base station into the room and still found the issue?
I would swap out all wires, connectors for that room with the original base station. I would give more thought to your dirty pins/connector train of thinking. Its possible that the moving of the base station just rustled the connectors up and now made clean connection.
I love troubleshooting this kind of stuff...as long as I am not under a schedule with a patient waiting.

PostPosted: Wed Jun 18, 2014 6:44 am
by bislab
somnonaut wrote:Bislab,
Why are you thinking something room related when you tried and found
"I've even removed the alice base station, plugged it into another room and the problem does NOT follow the base station."
Did you plug another base station into the room and still found the issue?
I would swap out all wires, connectors for that room with the original base station. I would give more thought to your dirty pins/connector train of thinking. Its possible that the moving of the base station just rustled the connectors up and now made clean connection.
I love troubleshooting this kind of stuff...as long as I am not under a schedule with a patient waiting.


It HAS to be room related because the Alice base unit works fine in any other room, the Alice headbox works fine in any other room, other headboxes have the same issue in that room. All wires are known to work in every room except this one.

The only thing I did not try from what you suggest is putting another Alice base unit in the room. I'll try that this weekend ;)

Re: Alice 5 system dropping signals

PostPosted: Sat Jun 28, 2014 9:14 am
by sleepadmin
If the problem is replicated with a new base station in the problem room, I would next run a heavy duty extension cord from an outlet on another breaker/circuit. This may help rule out power related issues.

Re: Alice 5 system dropping signals

PostPosted: Thu Aug 28, 2014 9:39 am
by bislab
Well I found what was causing the problem and the solution was easy enough!

The beds in our patient rooms have metal frames and headboards. The Alice head boxes hang from the metal headboards. Along that back wall that the two rooms with issues share there is an electrical problem in the wiring that affects our neighbor who we share the same wall with. It seems the metal headboards are amplifying the electrical issue and causes a particular frequency drop-out on the Alice headboxes. The solution was to put the headbox on the side table instead of hanging it from the bed frame. The problem is gone in both rooms now :)