ETS-Lindgren 3160 Series, User Manual

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Each Model 3160 Series antenna comes with a standard 1/4–20 mount.
Horizontal and vertical polarizations are obtained by rotating the antennas from
one position on the mount to the other. The mounts have been placed so as not
to interfere with incoming electromagnetic energy. For the variety of mounting
options available for the Model 3160 Series, see
Mounting Instructions
on
page 15.
The Model 3160 Series may be used for either transmission or reception. The
50 ohm input impedance is well-matched for generating high electric fields with
little power reflected back to the amplifier, reducing the chance of saturation. As
a receiver, the antennas are matched to free space (377 ohms). Typical
performance data is provided beginning on page 19. Methods for radiated
emissions measurement are described on page 23.
For TEMPEST applications, all Model 3160 Series antennas, especially models
3160-03 and up, can be mounted on standard 12-, 18-, or 24-inch reflector
dishes. The resulting antenna factor is usually about 20 dB lower than that of the
antennas by themselves. However, the HPBW drops to less than 50 and the
far field distance increases drastically making near field performance less
predictable.
ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren
Product Information Bulletin
included with your shipment
for the following:
•
Warranty information
•
Safety, regulatory, and other product marking information
•
Steps to receive your shipment
•
Steps to return a component for service
•
ETS-Lindgren calibration service
•
ETS-Lindgren contact information
10
| Introduction