13 | Keysight | N1913A and N1914A EPM Series Power Meters / E-Series and 8480 Series Power Sensors - Data Sheet

E-Series CW Power Sensor Specifications (continued)

Calibration factor (CF) and

reflection coefficient (Rho)

Calibration factor and reflection coefficient

data are provided at 1 GHz increments

on a data sheet included with the power

sensor. This data is unique to each sensor.

If you have more than one sensor, match

the serial number on the data sheet with

the serial number on the power sensor you

are using. The CF corrects for the frequency

response of the sensor. The EPM power

meter automatically reads the CF data

stored in the sensor and uses it to make

the corrections. For power levels greater

than 0 dBm, add 0.5%/dB to the calibration

factor uncertainty specification.

Reflection coefficient (Rho) relates to the

SWR according to the following formula:

SWR = 1 + Rho/1 – Rho.

Maximum uncertainties of the CF data are

listed in Table 5a, for the E4412A power

sensor, and Table 5b for the E4413A power

sensor. The uncertainty analysis for the

calibration of the sensors was done in

accordance with the ISO/TAG4 Guide.

The uncertainty data reported on the

calibration certificate is the expanded

uncertainty with a 95% confidence level

and a coverage factor of 2.

Table 5a. E4412A calibration factor uncertainty at

1 mW (0 dBm)

Frequency

Uncertainty*(%)

10 MHz

1.8

30 MHz

1.8

50 MHz

Reference

100 MHz

1.8

1.0 GHz

1.8

2.0 GHz

2.4

4.0 GHz

2.4

6.0 GHz

2.4

8.0 GHz

2.4

10.0 GHz

2.4

11.0 GHz

2.4

12.0 GHz

2.4

14.0 GHz

2.4

16.0 GHz

2.6

18.0 GHz

2.6

Table 5b. E4413A calibration factor uncertainty at

1 mW (0 dBm)

Frequency

Uncertainty*(%)

50 MHz

Reference

100 MHz

1.8

1.0 GHz

1.8

2.0 GHz

2.4

4.0 GHz

2.4

6.0 GHz

2.4

8.0 GHz

2.4

10.0 GHz

2.6

11.0 GHz

2.6

12.0 GHz

2.8

14.0 GHz

2.8

16.0 GHz

2.8

17.0 GHz

2.8

18.0 GHz

2.8

20.0 GHz

3.0

24.0 GHz

3.0

26.0 GHz

3.0

28.0 GHz

3.0