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System and method of training in a transmit/receive system

  • US 7,839,263 B2
  • Filed: 03/16/2005
  • Issued: 11/23/2010
  • Est. Priority Date: 03/16/2004
  • Status: Active Grant
First Claim
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1. A device for coupling to a vehicle and for training to activate a remote system, comprising:

  • a radio frequency transmitter having a training mode and an operational mode;

    wherein the radio frequency transmitter is configured to identify a rolling code encryption algorithm for use with the remote system from a plurality of rolling code encryption algorithms;

    wherein the radio frequency transmitter is further configured to synchronize a rolling code count of the remote system with a rolling code count of the radio transmitter during the training mode by transmitting, in response to a single user input, at least two messages having sequential encrypted rolling code values in accordance with the identified rolling code encryption algorithm;

    wherein the radio frequency transmitter is configured to transmit a next encrypted rolling code in the sequence with the first transmission of the operational mode.

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