Re: Extreme RF Noise source locating

[ABLE1 <somewhere@xxxxxxxxxxx>]

Thanks Rocky,

The suggestion of a "old fashion AM portable radio" might go well if I
had one.  I suggested the same thing to the customer and his response
was, "can I use the one in my car??"    Well NO...................

Can't remember the last time I listened to AM..............
Whoa!!  WBZ in Boston late in the evening or KYW 1060 in Philadelphia

Please explain further your comment about:
------------------------------------------------------------------------
"list the freq's of the effected receivers and see what their harmonics
are that would then give you an idea what might be causing the over lap..
------------------------------------------------------------------------
The freq of the window transmitters are 319.5mHz  Don't know the opener
freq (can't find it on setup sheet)

How do I find the harmonics??


Thanks!!

Les





On 9/25/2018 6:27 PM, RTS wrote:
> if its a high power source  you might try an old fashion  AM portable radio
>
> Pick a blank spot on the dial and run the volume way up and walk around
> the area..
>
> If you get a buzzing noise  you may have found your source..
>
> or
>
> list the freg's of the effected receivers and see what their harmonics are
>
> that would then give you an idea what might be causing the over lap..
>
>
> *Rocky T. Squirrel, esq.
>
> *
>
> On 9/25/2018 3:52 PM, ABLE1 wrote:
>> Hey guys,
>>
>> Yesterday I was setting up some wireless window sensors and
>> was having trouble after learning them in, could not get proper
>> response unless I was very close to the receiver.  My thoughts
>> were that I may have had a bad receiver, so I ordered another.
>>
>> Today I got a call from the customer asking if anything I did
>> would have effected the garage door remotes.  He further explained
>> that the remotes would only work when it was within 2 feet of the
>> actual opener.  I said there is NO corelation but, just to be sure
>> I had him power down the system by removing AC/DC so it was not powered.
>>
>> There was no change in the remotes to open the OH door from a distance.
>> I suggested he relearn the remotes into the opener and or call
>> the manufacture of the opener.  (Linear LD050)  He called back
>> and said he was told by Mfg. that there was a large RF Noise
>> source locally and he would need a Spectrum Analyzer to determine
>> where it was located.
>>
>> Since then he has determined that a next door neighbor has the same
>> problem with his remotes.  Also, another close neighbor had just left
>> for two weeks to Europe yesterday.  And that another 3 houses away,
>> the remotes worked just fine.
>>
>> Suspicion is that the vacationing neighbor turned on something upon
>> leaving that is causing this RF Dead Zone.
>>
>> The reason I am posting here is to ask if anyone else has experienced
>> this kind of issue??  And/or what household device could there be
>> that would create this problem??
>>
>> Or does anyone have any hints how to find something that is putting
>> out invisible STUFF??  It would be a lot easier if it would if it
>> emitted a green ooze.
>>
>> Thanks for any input!!
>>
>> Les
>>
>>
>>
>