BIRD THRULINE 4021, Instruction Book

Page: 57 / 62

Maintenance
47
CAUTION
Changing the sensor’s connectors will invalidate calibration data,
and may reduce the maximum power rating of the unit.
Bird 4027A Series RF Power Sensors
Power Range
4027A12M
4027A25M
4027A35M
4027A60M
4027A100M
4027A150M
All other models
300 mW – 1 kW
3 W – 9 kW
3 W – 7.5 kW
3 W – 6 kW
3 W – 5 kW
3 W – 4 kW
3 W – 10 kW
Frequency Range (Calibration Frequency)
4027A250K
4027A400K
4027A800K
4027A2M
4027A4M
4027A10M
4027A12M
4027A25M
4027A35M
4027A60M
4027A100M
4027A150M
250 – 400 kHz (250 kHz)
400 – 550 kHz (400 kHz)
800 – 950 kHz (900 kHz)
1.5 – 2.5 MHz (2.0 MHz)
3 – 5 MHz (4.0 MHz)
10 – 15 MHz (13.56 MHz)
10 – 15 MHz (13.56 MHz)
25 – 30 MHz (27.12 MHz)
35 – 45 MHz (40.0 MHz)
45 – 65 MHz (60.0 MHz)
95 – 105 MHz
150 – 170 MHz
Accuracy
±2 % from maximum range to 30 % of full scale
on the most sensitive range
±1 % at calibration frequency and power level
Repeatability
±1 % maximum unit to unit at calibration
frequency and power level
Insertion VSWR
(Insertion Loss)
1.05 (0.05 dB) max
Directivity, Minimum
4027A12M
All other models
30 dB
28 dB
Signal Purity
For rated accuracy no more than 1% AM
Harmonics –50 dB or less
Calibration Power Level
1 kW units
All other models
700 W
1700 W