System With Two Or More Transmitters In One Room - Shure DT 6008 User Manual

DIS Digital Conference System
System with two or more transmitters in one
room
When radiators in one multi-purpose room are
connected to two transmitters, an extra signal delay
is added by:
Transmission from master transmitter to slave
transmitter (cable signal delay).
Transmission through the slave transmitter.
Use the following procedure to determine the delay
switch positions in a master-slave configuration:
1. Calculate the cable signal delay for each
radiator, using the procedures for a system with
one transmitter.
2. Calculate the signal delay of the cable between
the master and the slave transmitter in the
same way as for cables between a transmitter
and a radiator.
3. Add to the cable signal delay of the cable
between the master and the slave, the delay of
the slave transmitter itself: 33 ns. This gives the
master-to slave signal delay.
4. Add the master-to-slave signal delay to each
radiator connected to the slave transmitter.
5. Determine the maximum signal delay.
6. Calculate for each radiator the signal delay
difference with the maximum signal delay.
7. Divide the signal delay difference by 33. The
rounded off figure is the signal delay switch
position for that radiator.
Cable length master-
slave transmitter [m]
50
Table 0-3 Calculation of the master-to-slave signal delays
Radiator Transmitter
number
1 Master
Master
2
Master
3
Master
4
Master
5
6 Slave
Slave
7
Slave
8
Slave
9
Slave
10
Table 0-4 Calculation of the delay switch positions of a system with two transmitters
Cable signal delay Cable signal
per meter [ns/m]
5,6 50 x 5.6 = 280
Master-to- Cable signal
slave delay per
signal meter [ns/m]
0 168
0
280
0
112
0
168
0
280
313 168
313
280
313
112
313
168
313
280
8. Add delay switch positions to radiators under
a balcony, if applicable (see section 0)
9. Set the delay switches to the calculated delay
switch positions
Figure 0-C, Table 0-1, Table 0-3 and Table 0-4
illustrate the calculation of the extra master-
slave signal delay.
R1
R3
R4
R6
Figure 0-C
Signal delay
delay [ns] slave transmitter
[ns]
33
Cable signal
delay [ns]
0+168 = 168
0+280 = 280
0+112 = 112
0+168 = 168
0+280 = 280
313+168 = 481
313+280 = 593
313+112 = 425
313+168 = 481
313+280 = 593
15
50m
R2
R5
50m
System with master and slave transmitter in multi
purpose room
Master-to-slave signal delay
[ns]
Signal delay Delay switch position
difference
[ns]
593-168 = 425 425/33 = 12.88 = 13
593-280 = 313
593-112 = 481 481/33 = 14.58 = 15
593-168 = 425 425/33 = 12.88 = 13
593-280 = 313
593-481 = 112
593-593 = 0
593-425 = 168
593-481 = 112
593-593 = 0
User Manual
50m
Tx1
50m
50m
50m
Tx2
50m
280 + 33 = 313
313/33 = 9.48 = 9
313/33 = 9.48 = 9
112/33 = 3.39 = 3
0/33 = 0
168/33 = 5.09 = 5
112/33 = 3.39 = 3
0/33 = 0