Planning Radiators; Cabling; Setting Radiator Delay Switches - Shure DT 6008 User Manual

DIS Digital Conference System
R1 R2
R3 R4
L
The effect of overlapping footprints
Figure 0-C

Planning radiators

Use the following procedure to plan the radiators:
1. Follow the recommendations in section 0 in
order to determine the positioning of the
radiators.
2. Look up (in the table) or calculate (with the
Footprint
DIS_FCPv5.3_.xlt) the applicable rectangular
footprints.
3. Draw the rectangular footprints in the lay-out of
the room.
4. If the receiver can pick up the signal of two
adjacent radiators in some areas, determine the
overlap effect
enlargement(s) in the lay-out of the room.
5. Check whether you have sufficient coverage
with the radiators at the intended positions.
6. If not so, add additional radiators to the room.
See Figure 0-K, Figure 0-L and Figure 0-M for
examples of a radiator lay out.
Tip: The Footprint
DIS_FCPv5.3_.xlt eases the work planning radiator
coverage. The Program is to be found at the 'DCS
6000 Digital IR System User Manual CD'

Cabling

Signal delay differences
differences in the cable length from the transmitter
to each radiator. In order to minimize the risk of
black spots, use equal cable length from transmitter
to radiator if possible (see Figure 0-D). When
radiators are loop-through connected, the cabling
between each radiator and the transmitter should
be as symmetrical as possible (see Figure 0-E and
Figure 0-F). The differences in cable signal delays
can be compensated
compensation switches on the radiators.
R1 R2
R3 R4
1.4 L
Calculation Program
and draw the footprint
Calculation Program
can occur
with the signal
Figure 0-D
Figure 0-E
due to
Figure 0-F

Setting radiator delay switches

As described in section 0, differences in the
delays of the signals picked up by the receiver
from two or more radiators can cause black spots
as a result of the multi path effect. The signals
delay
picked up by the receiver are delayed by:
the transmission from transmitter to radiator
through the cable (cable signal delay)
the transmission from radiator to receiver
through the air (radiation signal delay)
12
Radiators with equal cable length
Asymmetrical arrangement of radiator cabling (to be
avoided)
Symmetrical arrangement
(recommended)
User Manual
50m
50m
50m
50m
of radiator cabling