RF Transmitter / Receiver Test PCB for ASK Link - Custom RF test system for Wayne-Dalton, a garage door opener manufacturer.

Summary: The system is used to test the RKE (remote keyless entry) wireless link operation as part of a larger highly accelerated stress testing (HASS) system. The HASS system tests the electrical controls and electromechanical drive of the customer's OP40XR garage door operator assembly. The larger HASS system was designed by our strategic partner, Electromechanica, Inc., and the system is now part of Wayne-Dalton's production test process.

Transmit Section: The system contains a transmit section for simulating the keyfob opener RKE link. This allows testing of the RKE receiver MDS (minimum detectable signal) in the OP40XR operator. The transmit section produces an accurate ASK modulated 372 MHz carrier signal using encoded data from a KEELOQ encoder / microprocessor, with a precision step attenuator for accurate control of the RF power output level.

Receive Section: The system also contains a receiver section for testing the OP40XR transmitter, which typically communicates with an overhead light assembly. The receive section receives and demodulates an ASK modulated 433 MHz signal and verifies proper decoding. It also contains a precision step attenuator for accurate control of the RF power input level.

More information about Electromechanica, Inc. can be found at: www.electromechanica.com

More information about the HASS system can be found here.

The image below shows the TRXD PCB. The transmit section is on the left and the receive section is on the right. Each RF section has it's own 32 dB high-accuracy digital attenuator. The microprocessor and system interface is in the center. Click the image to see a larger view.