User's Manual

MDR2400-SR, MDR5800-SR and Orion 5825-SR
Issue 10 Page 38
4.3 Outdoor Unit
Before installing the MDR Outdoor Unit, ensure that a suitable mast is used for the
antenna and that the Outdoor Unit installation is firmly in position. The pole diameter
must be between 50 and 102 mm or between 2" and 4½".
The Outdoor Unit may also be mounted indoors, utilizing an optional rack mount
adapter (not included as a standard item) at the base of a tower for convenient
access. However, this as not recommended as a long and expensive RF cable would
then be required, compromising system sensitivity and increasing link costs.
CAUTION – ENSURE THAT THE POLE IS EARTHED FOR
LIGHTNING PROTECTION.
Follow these steps to install the Outdoor Unit:
1. Install the system antenna.
2. Adjust the mounting bracket to be slightly bigger than the pole diameter.
3. Secure the mounting bracket to the pole.
4. Secure the Outdoor Unit to the bracket using the screws on each bracket.
5. Connect the Outdoor Unit to the pole electrically by connecting the earth cable
or strap between the pole earth and the Outdoor Unit earth point.
6. Connect the type-N RF output connector to the system antenna through an in-
line lightning protection unit in areas with lightning activity.
7. Cover the connectors using an ultra violet protective, self-vulcanising tape.
4.3.1 RF Connection
1. The RF port is an N-type female connector.
2. The N-Type connector is used to connect to the antenna,
typically using coaxial transmission line.
3. 1/2" or 5/8” coaxial cables are recommended. Coaxial cable that
is 7/8” or larger can exhibit moding at 5.8 GHz and is not
recommended for 5.8 GHz radios.
4. Do not use right angle N-type connectors with the radios: they
may present high loss.
5. Do not use low quality cables. Some cable types, such as RG-8,
may have too high a loss at 5.8 GHz.
4.4 Interconnection Cable Installation
Follow these steps to install the Indoor Unit to Outdoor Unit interconnection cables.
CAUTION
- DO NOT OVER TIGHTEN THE CABLE STRAPS ON THE
CABLES AND DO NOT FASTEN THE STRAP LOCKING
MECHANISM OF THE CABLE STRAP ONTO THE CABLES.