Com-Power AL-130 User Manual
Features
Wide Frequency Range - 9 kHz to 30 MHz
Battery Powered
Built in Preamplifi er
Saturation Indicator
Three Year Warranty
Active Loop Antenna
AL-130
Description
The AL-130 is a broadband active receiving loop antenna for electromagnetic fi eld measurements from 9
kHz - 30 MHz. This antenna uses a 19 inch shielded
loop for magnetic fi eld (H-Field) measurements.
The AL-130 has built in active electronics that provide impedance matching, linear antenna factors and
higher antenna sensitivity, The output impedance is
matched to 50 Ohms, so that it can be directly connected to any spectrum analyzer without an additional
matching network.
The front panel has indicators for antenna saturation
and battery status. The internal NimH batteries take
about two hours to fully charge and can operate the
antenna for 8 hours continuously. A charger is included
with each antenna.
Application
The loop antenna is utilized for testing to meet the
various EMC requirements specifi ed by FCC, CISPR,
MIL-STD and EN. This antenna is specifi ed for
open fi eld emissions testing below 30 MHz. It is as-
sumed that in the far fi eld the ratio of E and H fi eld
will remain the same as the characteristic impedance
of the medium.
The loop antenna is positioned with its plane vertical
at the specifi ed distance from the EUT. In addition
to the EUT rotation, the loop antenna also has to be
rotated about its vertical and horizontal axis to maximize emissions. This procedure is described in detail
in ANSI C63.4.
Monopole antennas (such as the AM-741) also operate in the same frequency range as a loop antenna,
but are used for E-fi eld measurements and require a
counter poise.
Com-Power Corporation (714) 528 - 8800 www. com-power.com sales@com-power.com
Specifi cations
Frequency range: 9 kHz - 30 MHz
Dynamic range: 110 dB at 1 MHz
Sensitivity: 10 dBμV/m at 1 MHz
1 dB compression point : 3 V/m
Output Impedance: 50 Ohm
Connector type: BNC
Power: 6V, NimH battery pack
Charger output: 6 VDC, 500 mA
Weight: 6 lbs / 2.7 kgs
Loop diameter: 19 inches / 49 cm
Amplifi er section: 10.25 x7.25 x 2.5 inches. / 26 x 18.4 x 6.4 cm
Typical Antenna Factors
Electric
Magnetic
All values are typical values unless specifi ed.
All specifactions are subject to change without notice.
Com-Power Corporation 114 Olinda Drive, Brea, CA 92823 (714) 528 - 8800 www.com-power.com
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