
©Copyright 2005 by Bird Electronic Corporation
Instruction Book Part Number 920-4027AS Rev. H

Specifications
RFL Accuracy FWD Accuracy
FWD Power
10
Directivity 10/
---------------------------------+=
VSWR 1
P
R
P
F
------+
1
P
R
P
F
------–
⁄=
CAUTION
Changing the sensor’s connectors will invalidate calibration data, and may
reduce the maximum power rating of the unit.
Frequency Range
4027A250K
4027A400K
4027A800K
4027A2M
4027A4M
4027A10M
4027A12M
4027A25M
4027A35M
4027A60M
4027A100M
4027A150M
RF Power Range
4027A12M
4027A25M
4027A35M
4027A60M
4027A100M
4027A150M
All other models
Accuracy, Fwd, Best Case
Accuracy, Reflected
*
250 – 400 kHz
400 – 550 kHz
800 – 950 kHz
1.5 – 2.5 MHz
3 – 5 MHz
10 – 15 MHz
10 – 15 MHz
25 – 30 MHz
35 – 45 MHz
45 – 65 MHz
95 – 105 MHz
150 – 170 MHz
300 mW – 1 kW
3 W – 9 kW
3 W – 7.5 kW
3 W – 6 kW
3 W – 4 kW
3.75 W – 3.75 kW
3 W – 10 kW
± 1.0% (1σ)
Calculated from Fwd accuracy and power
Accuracy, VSWR Calculated from Fwd and Rfl power
Repeatability, Multiple Measurements, Single Sensor
* For rated accuracy, no more than 1% AM; Harmonics –50 dBc or less
Derate accuracy by 1% (1s) outside cal. power or cal. frequency
Derate accuracy by 1% (1s) below 15 °C and above 35 °C
Determined by connector repeatability
± 0.3% (2σ) with female “N” connectors

VSWR, Max 1.05:1
Insertion Loss, Max 0.05 dB (with female “N” connectors)
Directivity, Min
4027A12M
All other models
30 dB
28 dB
Impedance, Nominal 50 ohms
Max. Allowable Terminating
2.00:1
VSWR
Calibration Technique Frequency-specific calibration factors stored in
nonvolatile memory in each sensor. Sensor
output corrected for frequency and temperature within specified ranges.
Calibration Frequencies, Typical (MHz)
4027A250K
4027A400K
4027A800K
4027A2M
4027A4M
4027A10M
4027A12M
4027A25M
4027A35M
4027A60M
4027A100M
4027A150M
*
0.25, 0.40
0.40
0.90
1.8, 2.0, 2.17
4.0, 5.0
10.0, 13.56, 15.0
10.0, 13.56, 15.0
25.76, 27.12, 28.48
40.68
55.0, 60.0
95.0, 100.0
162.0
Cal Power, Typical
4027A12M
All other models
700 W
1700 W
Cal Cycle, Nominal 6 months
* Other calibration frequencies available upon request

Connectors Customer specified from “QC” list, appropri-
ate for frequency and power.
Operating Power Supplied by power meter via sensor cable
Sampling Rate, Nominal 2 readings / second
Temperature
Operating
Storage
0 to 50 °C (32 to 122 ºF)
–20 to +70 °C (–4 to +158 °F)
Humidity, Max 95% (non-condensing)
Altitude, Max 10,000 ft. (3,000 m)
CE CE Compliant. Refer to Declaration of Confor-
mity for specific standards
Dimensions, Nominal 5.2”L x 2.5”W x 3.25”H
(137 x 64 x 83 mm)
Weight, Nominal 1 lb. 13 oz. (0.8 kg)

Special Lifetime Warranty –
Series 4027A Power Sensor Head
In addition to its standard warranty, the Bird Electronic Corporation warrants its Series
4027A Thruline® Power Sensor Heads for lifetime to original purchaser. This extended
warranty is against burnout. For the warranty to apply, the Sensor Head must be used
with the correct Bird Electronic Corporation Display Unit, the maximum power rating of
the Sensor must not be exceeded, the Sensor RF circuit must be properly terminated and
the Sensor not subjected to physical abuse.
Bird Electronic Corporation, at its option, will repair or replace the defective Sensor at its
world Headquarters at 30303 Aurora Road, Solon, Ohio 44139.
The customer is responsible to pay transportation charges to return the defective sensor
to Bird.