Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, WERE due Dec 4th, 2022. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Recommended Posts

If my understanding is correct the key fob generates a signal at 433.9mhz, but it can be overwhelmed by a signal at the same frequency but of greater magnitude.

 

Most times my key fob works OK, but there is one location in a local supermarket car park when it does not work.  I can lock and unlock the car with the key, but not with the electronic fob.  At first I thought it was a faulty key fob, but when it happened twice in the same location I thought there must be something else going on.

This has also been happening to my son with another make of car when the car is parked on his driveway.  Sometimes his key fob works on the driveway and at other times it does not.  Recently, when staying with him this fault occurred twice.  Mysteriously it stopped just after 10.00 am. After which time there was no re-occurrence of the same problem.

 

My son has since bought a meter which registers and measures an RF signal.  In his area there is a continuous background RF signal about a fifth of the magnitude of the signal put out by his key fob. When the background signal is at this level, the key fob functions as it has a much higher strength signal.  Since buying the meter, the key fob has continued to work, but also there has not been a high overriding background RF signal.

 

It seems that many domestic signals are generated on the 433.9mhz frequency.  They are mainly short burst signals, so normally don't give problems.  Typical examples would be: garage doors, driveway gates, domestic heat controllers or short wave radios.  If these are strong and continuous I believe they could cause problems.   

 

Has anyone had similar key fob problems?

 

H

 

Link to comment
Share on other sites

Around your house could be an amateur radio operator or your Ministry of Defence.  The 433 mhz frequency is popular for all sorts of uses. https://en.wikipedia.org/wiki/LPD433

As for the supermarket parking lot - do you notice any remote cameras that may transmit to a security camera system?  They probably transmit in the 433 mhz range.

Edited by DBJoe996
  • Upvote 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.