powersoft Ottocanali 12K4, User Manual

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Ottocanali | 7
The row of potentiometers in the front panel behave differently on
non-DSP amplifiers and Ottocanali DSP+D amplifiers:
• In non-DSP Ottocanali amplifiers, the potentiometers act as
trimmers on the input level: the input signal is muted when the
trimmer is completely turned counterclockwise; on the other
hand, no attenuation is applied when the trimmer is completely
turned clockwise.
• In Ottocanali DSP+D the potentiometers attenuate the speakers
gain: they modify the overall gain applied to the group of ways
belonging to the selected speaker. The amount of gain attenuation
(External gain) is shown in ArmoníaPlus.
Attenuators
Output connectors are Phoenix PC 5/ 8-STF1-7,62 1777891.
Bridge-tied connection of lo-Z loudspeaker is supported on adjacent
channel pairs 1-2, 3-4, 5-6 and 7-8; inputs must be physically paralleled.
Any mixed configuration of low and high impedance output loads
can be realized: in order to set the load configuration, each channel
is provided by four DIP switches. Ottocanali Series is configured to
drive Lo-Z loads by factory default.
Hi-Z 70V/100V operations
Any channel of an Ottocanali Series amplifier can drive 70V/100V
(Hi-Z) distributed line of louspeakers. In order to connect any
channel’s output to a 70V/100V line, the rear panel DIP switch
corresponding to the channel must be correctly set.
Powersoft recommends to use the built-in HPF (High Pass Filter)
when the amplifier is set to drive a distributed line to prevent
loudspeaker transformer saturation which can considerably
degrade sound performance. The HPF can be activated by means of
the DIP switch corresponding to the channel: two cutting frequency
are available 35 Hz and 70 Hz.
Output connections
The Ottocanali’s GPO – general purpose output – system implements
triggering signals to broadcast alarms.
Ottocanali Series provides a pair of paralleled general purpose
output connections per channel: one Normally Open NO and one
Normally Closed NC.
The connections are available on the back panel via two 12-pin
Phoenix MC 1.5/12-ST-3.81 1803675 connectors for channels 1-to-4
and 5-to-8.
These contacts are used to report potentially dangerous faults or
generally unsafe operation conditions by toggling alarm switches
relative to the following events:
• No AC mains (i.e. system shutdown);
• Thermal stress: the system temperature reaches 70°C, thermal
protections are going to be engaged;
• Short circuit in output wiring: either the loudspeaker or the line
is in short;
• DC presence at the output: a continuously stationary signal is
present at output terminals.
Ottocanali DSP feature further monitoring on pilot tone and output
load through the GPO monitoring interface in ArmoníaPlus.
Pilot tone monitoring
Thanks to the built-in DSP, the Ottocanali DSP+D amplifiers
implement pilot tone detection and alert. Detecting and alerting
features are available for both input and output pilot tones on each
channel.
The detection of a mismatch in the input pilot tone parameters
(frequency and voltage level) can be used to trigger the backup policy
and activate an alert through the general purpose output switch.
The output pilot tone detection relies on an external signal passing
through the amplifier or the internal post DSP pilot tone generator;
in both cases any mismatch between the detected signal and the
set thresholds triggers the general purpose output switches.
Output load monitoring
Through ArmoníaPlus it is possible to set the thresholds on the load
impedance, at given frequency, that trigger the general purpose
output of any channel of the amplifiers with DSP.
GPO - Alarms
EN
Firmware update
Firmware updates for Ottocanali DSP+D can be loaded via the front
USB port. Updated releases of the Ottocanali DSP firmware are
available at https://www.powersoft.com/en/download/firmware/
Networking
Ottocanali DSP+D amplifiers support linear daisy-chain, star and
loop network topologies.
Be aware that daisy-chaining does not guarantee reliability in
production environment, since any fault may yield to network
sectioning and lost of system control.
Factory default network settings are DHCP/AutoIP.
Fixed IP policy can also be adopted and configured through
ArmoníaPlus.
If a DHCP server is not active within the network, the amplifier
platform initiates a stateless address auto-configuration (i.e.
Zero-configuration networking methodology – Zeroconf): it self
assigns a local numeric network address (of the type 169.254.x.y
– 172.31.*.* for the secondary network if present – with a subnet
mask 255.255.0.0) and automatically distributes and resolves the
hostnames of networked devices.
Both ArmoníaPlus and the Ottocanali DSP+D must belong to the same
subnet. If a DHCP server is present on the network and a Ottocanali
DSP+D amplifier is in AUTO IP, networking may become unstable.
As a rule of thumb, turn the DHCP server
on before connecting the amplifiers.
IP addressing of an Ottocanali DSP+D amplifier is established during
the bootstrap: when the Ottocanali DSP amplifier discovers a DHCP
server on the network during the startup, it negotiates the networking
parameters. If the Ottocanali DSP does not reveal a DHCP server on
the network during the startup it set itself in AUTO IP mode.
IP addressing
Ottocanali DSP+D amplifiers support Dante redundant networking
via the two Rj45 ports on the rear panel:
• Primary/ETH1 is the Primary network port;
• Secondary/ETH2 is the Secondary network port.
Dante connectivity is always supported on the Primary/ETH1
Gigabit Ethernet port; the Secondary/ETH2 Gigabit Ethernet port
offers continuity of operation when a parallel redundant network
is established.
In order to implement a Dante network, a computer running
Dante Controller has to be used. Ottocanali DSP+D amplifiers are
automatically discovered and displayed in Dante Controller with the
default identifier MODELNAME-SERIAL (e.g. 8K4-71520).
Dante networks will almost always require at least one network
switch. Redundant infrastructures may require multiple switches.
For maximum reliability, network switch shall:
• be Rated for Gigabit Ethernet;
• be Non-blocking;
• have Quality of Service (QoS) with at least four queues;
• have Diffserv (DSCP) QoS with strict priority;
• have EEE (Energy efficient ethernet) switched off.
Redundant network configuration
Dante Redundancy can be set up and used between any supporting
Dante-enabled audio equipment: it works by using two completely
independent and separate networks, the Primary Network and the
Secondary Network.
To setup and use Dante Redundancy, connect the Ottocanali DSP+D
amplifier and other redundant Dante-enabled audio equipment
using duplicate Gigabit switches and Ethernet cables. Connect your
computer running Dante Virtual Soundcard and Dante Controller,
and other non-redundant Dante-enabled audio equipment to the
Primary Network.
The primary and secondary networks MUST NOT be inter-connected
at any point. Make sure any computer is set to automatically
configure its IP address.
Dante™ networking
The package contains the firmware update file whose name is in the
form: update-
version#
-
model
.bin (e.g. update-1.10.0.68-
8ch.bin): store the firmware update file into a USB storage device
and follow these instructions:
1. Switch the amplifier on and wait for the completion of the boot
sequence.
2. Plug the USB storage device with the firmware update file to the
USB port in the front panel of the amplifier.
3. Press and hold the FW UPDATE pushbutton until the front LED
bars start blinking.
4. The update process lasts in 3-5 minutes. At the end the system
reboots and it is possible to extract the USB storage device.