Bird Multi-Sensor Cal Cart System
18
Bird 4027F Series RF Power Sensors
Frequency Range
4027F2M
4027F10M
1.8 – 2.2 MHz
12 – 15 MHz
RF Power Range
4027F2M, 4027F10M 0.1 – 10 kW
Accuracy, Fwd, Best Case ± 1.0% (2
σ)
Calibration Frequencies,
Typical
*
4027F2M
4027F10M
* Other calibration frequencies available upon request
1.8, 2.0, 2.17 MHz
12.0, 12.5, 13.56, 14.0, 15.0 MHz
Calibration Power, Typical 1.7 kW
Harmonic Rejection, Min.
4027F2M
4027F10M
26 dB @ 3.6 – 3.8 MHz, 30 dB @ > 3.8 MHz
30 dB @ > 25 MHz
Low Frequency Rejection, Min.
4027F10M 30 dB @ < 1 MHz
Max Error Induced by 10% AM
4027F2M, 4027F10M 0.2% @ < 5 kW, 1.0% @ 5 – 10 kW
VSWR, Max. 1.05:1
Insertion Loss, Max. 0.05 dB (with female “N” connectors)
Directivity, Min. 28 dB
Uncertainty Budget, 4027F Series
*
* All values 2
σ
4027F2M 4027F10M
Frequency
Error...
at cal freq ± 0.1% ± 0.1%
not at cal freq ± 0.5% ± 1.5%
Power
Linearity...
at cal power ± 0.1% ± 0.1%
not at cal power ± 1.0% ± 0.5%
Temperature
Uncert...
within 20 to 30°C ± 0.65% ± 0.6%
outside 20 to 30°C ± 3.2% –3.0, +0.75%
Calibration Uncertainty ± 0.6% ± 0.6%
Resolution
Uncert...
at cal power ± 0.06% ± 0.06%
not at cal power
†
† Resolution uncertainty is error due to limited display digits. Actual
uncertainty can be calculated as
± (1 in least significant digit) / Reading
For a 3.5-digit display, worst case is at 300W. Least significant digit is
one watt, uncertainty is ± 1W out of 300 or 0.34%. For a 4.5-digit
display, least significant digit is 0.1W, so the uncertainty is 0.034%
± 0.34% ± 0.34%
Other sources of error ± 0.4% ± 0.5%
Best Case RSS Uncertainty ± 1.0% ± 1.0%
