The R&S®FU129 antenna filter unit is placed close

to the receiving antennas. It comes with an antenna

input selector for remote controlled switching of

up to six antenna inputs to one output. Unwanted

signals, such as those caused by nearby mobile

base stations or strong sound and TV broadcast

transmitters, can be reduced to levels suitable for

the connected receiver by applying optional filters.

Both strong useful signals and interfering signals

can be suppressed.

R&S®FU129

Antenna Filter Unit

At a glance

When using the comprehensive and convenient

R&S®ARGUS monitoring software, integration of the

R&S®FU129 offers the opportunity to carry out extreme-

ly challenging and complex measurement series fully

automatically. This includes selecting one of various anten-

nas and switching the antenna paths as required, with and

without filters, amplifiers, etc. The area of reception is cov-

ered by directional antennas that are turned with rotators.

The software comes standard with path correction tables

to compensate for the insertion loss in defined paths. This

allows R&S®ARGUS to display the correct field strength

levels for all configurations.

Key facts

❙ 1-out-of-6 antenna input selector

❙ Wide frequency range from DC to 26.5 GHz

❙ Suitable for outdoor use very close to antennas

❙ Integrated rotator control (azimuth and polarization/

elevation)

❙ Powerful options:

■

Five selectable attenuators for reducing strong signal

levels

■

Two selectable ampliers for different frequency ranges

■

Up to ten selectable lters with different characteristics

❙ DC power supply for active antennas

Advantages of placement very close to antennas

❙ Each antenna, and the rotators for azimuth and

polarization/elevation, are connected with a short cable

❙ A single long RF feeder cable from the R&S®FU129 unit

to the receiver in the equipment room

❙ Required ampliers are located near the antennas –

ahead of any feeder cable that may cause signicant

loss – to achieve the best possible signal level

❙ Only one control cable is required to control all functions

and the rotators

❙ The maximum recommended length of the control cable

to the R&S®MSD is 50m. The maximum recommended

length of the LAN cable is 100m

All R&S®FU129 functions are controlled either directly by a

control PC (connected to the R&S®FU129 via a LAN cable)

or by the tried-and-tested R&S®MSD antenna switching

unit.

Excellent documentation for both interfaces ensures that

end customers and system integrators can easily integrate

the R&S®FU129 into customized systems and existing

projects.

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