Bird Multi-Sensor Cal Cart System
16
Specifications Common to all Sensors
Bird 4020 Series RF Power Sensors
CAUTION
Changing the sensor’s connectors will invalidate calibration data, and may
reduce the maximum power rating of the unit.
Impedance, Nominal 50 ohms
Max. Allowable Terminating
VSWR
2.00:1
Calibration Technique Frequency-specific calibration factors stored in
nonvolatile memory in each sensor. Sensor output
corrected for frequency and temperature within
specified ranges.
Accuracy, Reflected Calculated from FWD accuracy and FWD power
Accuracy, VSWR Calculated from FWD and RFL power
Sampling Rate, Nominal 2 readings/second
Operating Power Supplied by power meter via sensor cable
Dimensions
4028B10M
4028A Series
All other models
6.75”L x 3.5”W x 4.75”H (175 x 89 x 121 mm)
4.7”L x 3.2”W x 3.8”H (120 x 82 x 97mm)
5.2”L x 2.5”W x 3.25”H (137 x 64 x 83 mm)
Weight, Nominal
4028B10M
4028A2M, 3M, 4M, 10M, & 25M
All other models
5 lb. 2 oz. (2.33 kg)
3 lb. 5 oz. (1.5 kg)
1 lb. 13 oz. (0.8 kg)
RF Power Range
4021, 4022
4024, 4025
300 mW – 1 kW
3 W – 10 kW
Frequency Range
4021
4022
4024
4025
1.8 – 32 MHz
25 MHz – 1 GHz
1.5 – 32 MHz
100 kHz – 2.5 MHz
Accuracy, Fwd, Best Case
*
* For rated accuracy, no more than 1% AM; Harmonics –50 dBc or less
Derate accuracy by 3.0% (1
σ) below 15 °C and above 35 °C
± 3% (1σ)
VSWR, Max.
4021, 4024, 4025
4022
1.05:1
1.05:1, 25 – 512 MHz
1.10:1, 512 MHz – 1 GHz
Insertion Loss, Max.
4021, 4024, 4025
4022
0.05 dB
0.05 dB, 25 – 512 MHz
0.13 dB, 512 MHz – 1 GHz
Directivity, Min.
4021, 4022
4024
4025
30 dB
28 dB, 1.5 – 2.5 and 25 – 32 MHz
30 dB, 2.5 – 25 MHz
28 dB, 100 – 125 kHz
30 dB, 125 – 2500 kHz
RFL Accuracy FWD Accuracy
FWD Power
10
Directivity 10/
---------------------------------+=
VSWR 1
P
R
P
F
------+
⎝⎠
⎜⎟
⎛⎞
1
P
R
P
F
------–
⎝⎠
⎜⎟
⎛⎞
⁄=
