Grass Valley HD Wireless - Manual (Page 24)

24 HD Wireless User’s Guide (v6.2)
Chapter 2 - Installation
2.3 Antenna Management Unit (AMU)
2.3.1 Antenna positioning
To get the best benefits from reflections the receiving set is equipped with a three-antenna
diversity system. The AMU uses the MRC (Maximum Ratio Combining) system for optimal
transmission robustness. Both transmitting and receiving antennas are omni-directional, so
there’s no need for alignment or tracking.
Position the AMU strategically in the area you wish to cover. Preferably, mount the antenna
assembly on a mast or attach it to a raised structure.
Caution
Always ensure that the antennas are vertical. This ensures best reception.
If required, a second AMU can be used to extend the covered area. To cover a typical stage
area, it might be a good idea to place antenna assemblies upside-down at a high point on either
side of the stage.
A good rule of thumb is to keep a line of sight from the camera standpoint towards the
receiving antennas.
Caution
Always use the antennas that were supplied with the modules. Using the wrong antennas will
result in poor coverage.
2.3.2 Antenna unit assembly
Set up the antenna support assembly close to the AMU as follows:
1. Unfold the antenna support assembly.
2. Attach the three antenna receiver units to the ends of the arms.
3. Attach the data emitter unit including the data booster to the centre of the assembly.
4. Screw the three antennas with SMA connector onto the antenna receiver units.
5. Connect the data antenna with BNC connector onto the data booster unit.
6. Connect the data booster SMA input to the data emitter BNC output with the supplied
coaxial cable.
7. Connect the three BNC coaxial connectors of the supplied cable to the antenna receiver
units.
8. Connect the 9-pin sub-D connector to the data emitter unit.
9. Connect the 2-pin LEMO connector to the data booster unit.
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Note
Steps 2,3,5 6 are for reference only and already carried out in the factory.