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§ 1703.4. Reader-to-Transponder Trigger Pulse.

21 CA ADC § 1703.4Barclays Official California Code of Regulations

Barclays California Code of Regulations
Title 21. Public Works
Division 2. Department of Transportation
Chapter 16. Compatibility Specifications for Automatic Vehicle Identification Equipment
Article 4. Reader Specifications
21 CCR § 1703.4
§ 1703.4. Reader-to-Transponder Trigger Pulse.
Currentness
(a) Trigger Pulse Definition.
The reader shall provide a wakeup trigger for the transponder. The trigger shall consist of a 33 microsecond long, RF pulse at the assigned carrier frequency that is modulated with a continuous string of ones. The trigger pulse shall be followed immediately by a delay (i.e., no RF transmission) of 100 microseconds in duration. The wakeup pulse is intended to signal a dormant transponder to fully activate itself.
(b) Trigger Pulse Field Strength.
The required horizontal component of field strength produced by the trigger pulse at the maximum downlink range (site dependent) of the reader shall be greater than 500 mV/m.

Credits

Note: Authority cited: Section 27565, Streets and Highways Code. Reference: Sections 27564 and 27565, Streets and Highways Code.
History
1. Renumbering of former section 1704.4 to new section 1703.4, including amendment of subsection (a), filed 11-28-2017; operative 1-1-2018 (Register 2017, No. 48).
This database is current through 4/26/24 Register 2024, No. 17.
Cal. Admin. Code tit. 21, § 1703.4, 21 CA ADC § 1703.4
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