Alam goes off when using key to unlock door.

Discussion in 'General Motoring' started by John, Aug 13, 2006.

  1. John

    John Guest

    If this is not the correct forum to ask this question, please suggest a better
    one. Thanks!

    I just bought a (pre-owned) 2006 Chrysler 300 Touring.
    A strange (I think) thing is happening: When I lock the car, the security system
    is armed (that's normal).
    When I unlock the car using the key in the driver's door, and then open the
    door, the alarm goes off.
    Since this car is equipped with a very "authoritative" horn, it is a bit

    Is this a problem with my car? or am I overlooking something?

    Thanks for any help and/or suggestions!
    John, Aug 13, 2006
  2. John

    maxpower Guest

    Always start with reading the owners manual.
    Since this model is not equipped with lock cylinder switches, passive
    disarming of the VTSS is only possible if the vehicle is equipped with the
    optional Sentry Key Immobilizer System (SKIS). On vehicles with SKIS,
    turning the ignition switch to the On position using a valid SKIS key will
    passively disarm VTSS. Active disarming of the VTSS occurs when the vehicle
    is unlocked by depressing the "Unlock" button of the RKE transmitter. Once
    the alarm has been activated, either disarming method will also deactivate
    the alarm.

    Glenn Beasley

    Chrysler Tech
    maxpower, Aug 13, 2006
  3. John

    John Guest

    Thank you, Glenn: Wish the above info had been in the manual.

    Whuch beggs the question: Why even sell additional keys which do not have the
    RKE transmitter incorporated?
    Do you feel dealers are familiar with the details you gave me?

    John, Aug 13, 2006
  4. John

    maxpower Guest

    maxpower, Aug 13, 2006
    Ted Mittelstaedt, Aug 14, 2006
  6. John

    damnnickname Guest

    damnnickname, Aug 14, 2006
  7. John

    Bob Shuman Guest

    This "extender" is a simple repeater. It "relays" the signal in both
    directions between the low power client device and the only slightly higher
    power Access Point. These do work well when used for their designed purpose
    and provided there is adequate signal to noise ratio.

    Regarding what Ted stated, there is indeed a maximum allowed WiFi Effective
    Isotropic Radiated Power of 4 Watts (36dBm) for an Omni antenna in the USA.
    By the way, this figure is way above what most residential/SOHO access
    points will emit. Most of these devices are more along the order of
    100-200mW EIRP (some are less). But, the usual problem is not with the AP
    transmit power since it can usually be heard at the client device. The
    usual issue is with the other direction, the uplink (the RF link from the
    client to the AP) since the client device has much lower EIRP due to
    physical antenna design and need to operate on lower (typically battery)

    Bob Shuman, Aug 15, 2006
  8. Keep in mind you can only use 1 of these with your access point, if
    you try using multiple ones they will see each other's signals and
    attempt to repeat each other.

    Ted Mittelstaedt, Aug 15, 2006
  9. Keep in mind with a higher gain antenna at the base unit, the base
    unit antenna will be much more sensitive to the client device. Naturally
    the stronger radiated power the better, but a sensitive antenna will
    gather more signal and so it does in fact, help in both directions.

    Ted Mittelstaedt, Aug 15, 2006
  10. John

    damnnickname Guest

    Thanks Ted. This one is doing a good job and one will do it

    Glenn Beasley
    damnnickname, Aug 15, 2006
  11. John

    Bob Shuman Guest


    Yes, what you say here is indeed true. Antenna gain works for both transmit
    and receive and for a typical SOHO AP omni antenna the gain is about 4-8dBi.
    This gain comes by effectively "squashing" the isotropic/spherical RF
    propagation pattern into something that more closely resembles a donut
    pattern. The only caution here is that gain in the vertical direction
    (between floors) in the house will not be the as much as horizontally
    (between rooms on the same floor).

    But, this all does not matter much since the AP usually still has a higher
    transmit power output, so the forward (downlink) link budget provides for a
    higher received signal strength at he client. Assuming similar noise levels
    (since it is the signal to noise that really matters), and roughly the same
    receiver sensitivities (usually the AP has slightly better sensitivity), the
    uplink is still the usual limiting factor.

    Bob Shuman, Aug 15, 2006
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.