Re: Extreme RF Noise source locating

[ABLE1 <somewhere@xxxxxxxxxxx>]

Just found that the Opener Remotes works on 318mHz
So they are in the same basic range.
Don't know much about harmonics but it has to be close.




On 9/25/2018 7:13 PM, ABLE1 wrote:
> 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??"Â Â Â  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
>>>
>>>
>>>
>>
>