Operating instructions

13
CHAPTER 3: CAL USER PANEL
The CAL user panel includes audio input connectors, both
analog and digital (AES/EBU), for receiving audio source sig-
nals; logic connectors for selecting presets, overriding and
muting audio output, and monitoring loudspeaker faults;
and network ports for interfacing to a Mac or Windows-
based computer running the Compass control software. The
network ports can also be used for receiving AVB audio
streams as audio source signals.
AUDIO INPUT
CAL includes four numbered audio inputs: three analog and
one digital. The three analog inputs also provide loop output
for looping multiple loudspeakers from a single audio
source. In the Compass control software, a single input is
specified as the active input, and another input can be spec-
ified as an override input (when the installation requires CAL
to function as part of a fire alarm or evacuation system).
NOTE: AVB audio streams received from the
Network / AVB ports can also be used as audio
sources. For more information, see “AVB Audio
Stream Input” on page 17.
NOTE: CAL ships from the factory with Analog
Input 1 selected as the active input, and no
input selected for the override input. These inputs
can be changed with the Compass control software.
For more information, refer to the Compass docu-
mentation included with CAL (also available at
www.meyersound.com
).
Analog Inputs (1–3)
The three analog inputs use Phoenix 6-pin male connectors
and accept balanced audio signals with an input impedance
of 10 kOhm. The analog audio source is received via the
connector’s top three pins (shield, positive, and negative).
The signal is looped to the connector’s bottom three pins
(also shield, positive, and negative) for output when looping
multiple loudspeakers from a single audio source. The pins
for the analog connectors are clearly labeled on the CAL
user panel.
CAL User Panel
Network/AVB
1 2
NO
Logic I/O
1 2 3 4
Preset
com
a1
a2
Com
Mute
Fault
Contact
NC
Override
+5 Vdc
Com
On/
Status
Limit
1 2 3 4
AES/EBU
Audio Input
Analog
LOOP IN
S
+
-
S
+
-
S
+
-
S
+
-
S
+
-
S
+
-
S
+
-
NOT USED
Analog Audio Input and Loop Output Connectors
1 2 3
Analog
LOOP IN
S
+
-
S
+
-
S
+
-
S
+
-
S
+
-
S
+
-