System With One Transmitter - Shure DT 6008 User Manual

DIS Digital Conference System
for systems with two or more transmitters: the
transmission through the slave transmitter(s)
To compensate the signal delay differences, the
delay of each radiator can be increased. These
signal delays can be set with the delay switches at
the back of the radiator.
The cable signal delays can be determined in the
following two ways:
by measuring the cable lengths
by measuring the impulse response time with a
delay measurement tool
In both cases the cable signal delays can be
calculated manually and with the delay switch
calculation tool (available on the documentation
CD-ROM). It is not necessary to calculate the cable
signal delay in case:
the radiators are directly connected to the
transmitter with equal cable length;
radiators are loop-through connected, but with
less than 5 m distance between the first and last
radiator in a trunk, and with equal cable length
between the first radiator in each trunk and the
transmitter.
In these cases set the delay switches on all
radiators to zero and determine whether to
compensate for radiation signal delay (see section
0).
The next sections describe how to calculate the
delay switch positions manually for systems with
one transmitter, or two or more transmitters. See
the delay switch calculation tool for the procedures
how to calculate
automatically.
Tip: The Delay
DIS_DSCv5.3a_.XLT eases the calculation of the
delay switch positions. The Program is to be found
at the 'DCS 6000 Digital IR System User Manual
CD'.

System with one transmitter

Determining delay switch positions by
measuring the cable lengths
Use the following procedure to determine the delay
switch position based on cable lengths:
1. Look up the cable signal delay per meter of the
used cable. The manufacturer specifies this
factor.
2. Measure the lengths of the cables between the
transmitter and each radiator.
the delay switch
Switch Calculation
3. Multiply the lengths of the cables between the
transmitter and each radiator with the cable
signal delay per meter. These are the cable
signal delays for each radiator.
4. Determine the maximum signal delay.
5. Calculate for each radiator the signal delay
difference with the maximum signal delay.
6. Divide the signal delay difference by 33. The
rounded off figure is the signal delay switch
position for that radiator.
7. Add delay switch positions for radiators under
a balcony, if applicable (see section 0).
8. Set the delay switches to the calculated
switch positions.
Note: For systems with a cable length difference
of more than 50 meters, it is recommended to
use a measurement tool to determine the delay
differences in order to calculate the delay switch
positions.
Figure 0-A and Table 0-1 illustrate the calculation
of the cable signal delay.
Note: The used cable signal delay per meter is
an example. Use the actual signal delay per
meter in this calculation as specified by the
manufacturer.
Caution: Turn the delay switches carefully to a
new position until you feel that it clicks into
position, to prevent that a switch is positioned
between two numbers, which would result in a
wrong delay setting.
positions
tool
Figure 0-A
13
20m
R1
R2
R3
R5 R4
20m
System with five radiators and measured cable
lengths
User Manual
30m
20m
30m