Crown Audio IQ-SLM8 - Manual (Page 18)

Page 18
IQ–SLM-8 System and Load Monitoring IQ System Component
Reference Manual
4.9 EMI Suppression
In order to comply with FCC regulations, it is necessary
to add an external EMI (electro-magnetic interference)
suppression core to the wiring in three locations.
These locations are:
1 Crown Bus input and output wiring (Section 4.3)
2 Generator output wiring (Section 4.3)
3 AUX input and output wiring (Section 4.8)
Three cores are provided which are designed to easily
snap over the wiring at these locations. The cores are
large enough to snap over two cables to accommo-
date the Crown Bus and AUX wiring which often use
two cables each.
4.10 Synchronous Setup
In a large audio system it may be desirable to use
more than one
SLM-8 so that more than eight outputs
and/or loads can be monitored. When this is done, the
SLM-8s can be synchronized so they function in uni-
son as a group. Here are the steps for synchronizing
multiple
SLM-8s:
1 Select one of the SLM-8s and use its Generator
Out to insert the test signal upstream of all SLM-8
monitor points in the audio system.
2 Set the “Generator” and “Sweep” settings of all
SLM-8s so they are all the same.
3 Turn on the “Sync” control of each unit.
After the above preparations have been made, there
are two ways to generate a synchronized test. The first
way is to use the IQ software’s “All Start” command to
simultaneously initiate a test with all units. Of course,
this requires that all units be connected to an
IQ Sys-
tem. Incidentally, you can stop a test that is in progress
with the “All Abort” command.
The second way to generate a synchronized test is
with the AUX input. This enables you to perform syn-
chronized testing with stand-alone units that are no
longer connected to an
IQ System. To use this method
you will need to turn on the AUX In Trigger setting when
the units are being configured before they are discon-
nected from the
IQ System. Then you will need to
connect the AUX inputs of all units to the same trigger
circuit (a +5 to +15 VDC logic circuit as described in
Section 4.8.1). When the AUX inputs sense a logic
high, the units will start a test. To abort a test, simply
send a second logic high.