E-series cw power sensor specifications, Continued), Frequency uncertainty*(%) – Atec Agilent-EPM Series User Manual

Page 12

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 sen-
sor 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 calibra-
tion 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)