user manual
TFS-780
TFS-780 user manual
Page 12
Setting Horizontal Angles
The Single Bars are pivoted on the Twin Bars which in turn are pivoted on the Main Bar. The
pivots include a nylon spacing washer to eliminate free play and allow for smooth operation.
A spring loaded Index Pin locates in one of a series of holes to secure the pivot at the desired
angle. A particular advantage of this pivot arrangement is that the horizontal splay of the
array may be adjusted whilst the system is in the air, and because the Single and Twin Bars
pivot about their centre points the array remains in perfect balance.
A secondary chain bypasses each pivot point to comply with safety requirements.
The Index Pin allows angles between columns of 0º to 40º to be set in 5º degree increments.
A minimum of 10º in the horizontal plane is recommended between Flashlight high packs to
ensure even coverage at the higher frequencies. Increased coupling is best achieved in the
vertical plane, as described in the next section.
Tilting
A high density white plastic locating tab
(biscuit)
is secured inside the door of each TFS-
780H. This is placed in the tilting bar slot at the top rear of the enclosure, and locates in the
enclosure above. These tabs act as simple and efective hinges, and ensure that the backs of
the enclosures stay in alignment with each other.
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