Boonton Power Sensor Manuel d'utilisateur télécharger pdf (Page 9)

Power sensors have response variations (with respect to the reference frequency) at

high frequencies. Calibration factors ranging from ± 3 dB are entered into the

instrument memories at the desired frequencies. Generally, calibration factors are

within ±0.5 dB. These calibration factors must be traceable to the National Institute

of Standards Technology (NIST) to be meaningful. This is accomplished by sending

a standard power sensor (Thermocouple type) to NIST or a certified calibration house

and comparing this standard sensor against each production sensor. The predominant

error term is the uncertainty of the reference sensor, which is typically 2% to 6%,

depending on the frequency. Refer to Figure 1-3. Calibration Factor Traceability.

NIST

Golden Gate

Calibration Labs

Standard

Sensors

Scalar

Network Analyzer

Sensor

Calibration Factors &

SWR

Figure 1-3. Calibration Factor Traceability

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Boonton Power Sensor Manuel d'utilisateur Page 9