User's Manual

DCX KeyFob Module
Operations Manual
DCX_KeyFob_UserManual_1.45_2007Apr2.doc
4
Technical Specifications
KeyFob Mechanical Design
The KeyFob has six mechanical components.
1. Component Mounted PCB.
2. Elastomer Buttons.
3. Battery Clip.
4. Plastic Housing (Top & Bottom Halves).
5. Metal Key-Blade.
6. Key Ring.
RKE Wireless Specifications
Stabilized by a SAW resonator, the resonant frequency is generated by an oscillator
transmitting on a frequency of 315MHZ, within an accuracy of +/-75kHz.
RKE Transmitter -- General Wireless Specifications
Parameter Specification Units
Center Frequency, Accuracy, and Stability
Center Frequency (Carrier)
315.000
MHz
Accuracy +/- 75 kHz
Stability +/- 75 kHz
Polarization Ratio
(between any two axes)
5 (with linearly polarized receiving
antenna)
dB
Load Induced Frequency Shift +/- 40 kHz
Operating Stability with Voltage Variation / Low Battery
Output Power Stability 5 dB
Frequency Shift +/- 20 kHz