How AGD343 annual recertification is performed

The proposed AGD343 recertification process checks speed and range response, transmit characteristics and internal self-test measurements in a controlled chamber.

Who should use this article

This is an assurance overview for approved AGD and partner personnel. It is not a field calibration procedure. The source requirement is annual calibration under section 10.1.1 of the Home Office Speedmeter Traffic Light and Prohibited Lane Enforcement Camera Handbook version 2.0.

Target simulation method

The AGD343 measures range, Doppler speed and elevation. The proposed test equipment receives the radar signal, adds a controlled delay to represent target range, applies IQ modulation to represent target speed, and transmits the signal back to the radar. A frequency counter measures the received transmission for the required and indicative checks.

Chamber arrangement

Use an anechoic chamber to reduce reflections and improve repeatability.
The proposed chamber is a 1.2 m cube because the calculated AGD343 near-field distance is approximately 1.1 m.
Place the simulator antenna 310 mm below the AGD343 antenna boresight to create an expected elevation measurement of approximately 15 degrees.

Measurements to record

Measurement	Method or expectation
Average transmit frequency	Measure with the frequency counter
Transmit power	Record as an indicative measurement
Transmit bandwidth	Record as an indicative measurement
At least five simulated speeds	Record speed range and elevation for each point
Simulated range	Expected to be approximately 42 m
Simulated elevation	Expected to be approximately 15 degrees

Radar self test data

Command	Check
*VOLTAGES?	Internal power supply levels
*NLS=1	Receiver noise-floor measurements
*TXP?	Internal transmit power reading
*FR?	Radar frame rate and associated frequency source
*TEMP?	Processor and microwave module temperatures

The approved partner test rig, chamber design, software, tolerances and traceability records must be controlled by the formal recertification process.

Applies to AGD343 enforcement radar

Source TAN51 issue 1 2025