Calibration / AVP

Comware performs system level calibrations on 3070’s following the published manufacturer’s procedures. This process is traceable to National Institute of Standards and Technology (NIST) standards. The procedure uses a traceable voltmeter and frequency counter to measure a DC voltage source at 21 voltages, an AC voltage source at nine voltages, a resistor, and two oscillator frequencies. These measurements are the foundation for all analog measurements and digital timing. These same parameters are also measured using the internal detectors in the testhead, and then compared against the external voltmeter and frequency counter to verify calibration of the detectors.