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ATU Installation Guide
Congratulations on your purchase of an Antenna Tuning Unit (ATU) the FLEX-5000.
You will need the following materials to complete the installation:
• One (1) FLEX-5000 ATU (Assembly 52, Rev. B or higher)
• One (1) metal RF shield
• One (1) ATU Control ribbon cable with connectors
• One (1) mini coax jumper with BNC connectors
• Four (4) 3/4” (1.9 cm) threaded spacers with post (
already installed on newer FLEX-5000s
)
• Four (4) 1/4” (6.35 mm) threaded spacers with post
• Four (4) 1/4” Hex nuts
• Eight (8) flat washers
• Eight (8) internal tooth lock washers
Required Software
The most current version of PowerSDR v2.x.x
Prerequisites for Installing the ATU
The ATU is designated as a user or field installable upgrade only if the FLEX-VU5K (V/U module) is NOT previously
installed. If a FLEX-VU5K is installed in your FLEX-5000, then you must return it to an authorized FlexRadio Systems
Service Center for installation. Installation charges are applicable.
Before starting, remember to observe proper ESD (electrostatic discharge) procedures before attempting the
installation of the FLEX-5000 ATU in order to prevent damage that may occur from static charges that can build up
on your body or work surfaces. This is especially a concern during the winter months or in climates where the
relative humidity can be very low.
Preparing the FLEX-5000 for ATU installation
Remove the FLEX-5000 from the Operating Position
a. Turn off the Power to the FLEX-5000 and remove the power connector and all other connecting cables.
b. Place the FLEX-5000 on a flat, well lit working surface.
