Boonton Power Sensor - Manual (Page 8)

1-3 Calibration and Traceability
Boonton employs both a linearity calibration as well as a frequency response calibration.
This maximizes the performance of Diode Sensors and corrects the non-linearity on all
ranges.
Linearity calibration can be used to extend the operating range of a Diode Sensor. It can
also be used to correct non-linearity throughout a sensor's dynamic range, either
Thermocouple or Diode. A unique traceability benefit offered is the use of the 30 MHz
working standard. This is used to perform the linearization. This standard is directly
traceable to the 30 MHz piston attenuator maintained at the National Institute of
Standards Technology (NIST). Refer to Figure 1-2. Linearity Traceability.
NIST
Microcalorimeter
NIST
Piston Attenuator
0 dBm
Test Set
Fixed
Attenuators
30 MHz Working
Standard
Linearity Calibration
Meter & Sensor
Figure 1-2. Linearity Traceability
Power Sensor Manual 3