Crown Audio IQ-RPT - Manual (Page 5)

IQ-RPT Crown Bus Signal Repeater
®
Page 5
IQ SYSTEM
HOST COMPUTER
SMX-6
IQ INTERFACE
SMX-6
MPX-6
AMPLIFIER
AMPLIFIER
AMPLIFIER
SMX-6
SMX-6
MPX-6
AMPLIFIER
AMPLIFIER
AMPLIFIER
CR
O
WN B
U
S
CR
O
WN B
U
S
LOOP 1 LOOP 2
Fig. 1.2 An IQ System Fig. 1.3 An IQ System with an IQ Repeater
SMX-6
IQ INTERFACE
SMX-6
MPX-6
AMPLIFIER
AMPLIFIER
AMPLIFIER
SMX-6
SMX-6
MPX-6
AMPLIFIER
AMPLIFIER
AMPLIFIER
CR
O
WN B
U
S
CR
O
WN B
U
S
LOOP 1
LOOP 2
IQ REPEATER
IQ SYSTEM
HOST COMPUTER
1 Welcome
The IQ-RPT repeater helps an IQ System ® go the extra
mile by increasing the length of a Crown Bus loop. It
does this by reconstructing the data signal to prevent its
degradation. With a Repeater in a system, 1,000 feet
(305 meters) or more can typically be added to the
operating distance of a Crown Bus. And because more
than one repeater can be used on each loop, the potential
is impressive.
The Crown Bus is a serial communication loop designed
to transmit IQ commands and data. As implemented in
the
IQ-RPT, it is a 20-milliamp current loop operating at
38,400 baud. To function properly, Crown Bus loops must
be unbroken.
The IQ-RPT works with all currently available Crown Bus
interfaces. These interfaces include the IQ-PSI with one
Crown Bus loop, the IQ-DRN-16 with two loops and the
IQ-INT II with 8 loops. IQ mixers (including the MPX-6,
SMX-6 and AMB-5) also have a single-loop Crown Bus
interface. Figure 1.2 shows an
IQ-INT II with two
connected Crown Bus loops.
POWER
INPUT OUTPUT
STATUS
Fig. 1.1 IQ Repeater
The IQ-RPT will typically extend a Crown Bus current
loop by 1,000 feet (305 meters) or more. Up to 57
repeaters can be added to a single loop, so total loop
distance my reach 58,000 feet (17.7 kilometers). That’s
almost 11 miles! Figure 1.3 shows a system with an
IQ-
INT II and repeater on its first Crown Bus loop.