AXIA / LIVEWIRE SETUP |
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PDM
PDM Operator's Manual Version 2.4a • September 2019
Other Livewire GPIO
PDM can also receive triggers and send status levels to other distant devices, using an Axia
GPIO node. You may want one of these near an automation system or satellite terminal. Set
it up by opening PDM’s GUI on a network computer, clicking the
CONFIGURATION
tab,
and entering an address in one of the
Livewire Port
fields.
n
The format is IP address of the Node, a slash, then the node’s port number.
Axia GPIO nodes typically have eight separate DB-15 connectors. Each is electrically sepa-
rate, and represents a different port on the unit. So the port number will be between 1 and 8,
depending on which of the node’s jacks you’re using.
In our screen shot example, PDM’s
Port Address 2
is set to communicate with
port 4
of the
GPIO Node at
192.168.1.21…
In other words, if you pull Pin 11 (GPIO input 1) low on DB-15
number 4 (Port 4) on that node, PDM goes into Dump mode.
Of course you’re free to use any input or output, on any port of any node on the network,
and assign any PDM function.
About the Bypass button
In standard XLR analog/digital versions of PDM, the Bypass button takes PDM out of the
signal chain. Hardware relays connect PDM’s analog and digital inputs to its outputs with
no processing or delay. This design acts as a failsafe, even in the event of a power failure.
But in an IP based audio world, there is no equivalent. Relays can’t route IP packets. If the
power has failed, there’s no way to route packets at all.
Therefore, pressing
BYPASS
on PDM-Axia units has the following effect:
n
Any existing buffer gets dumped.
BUILD
,
EXIT
and other controls become inactive.
n
Inbound packets get sent out, bypassing any PDM-specific functions. There is,
however, a tiny delay while the packets pass through PDM’s computer.
You may find it useful to set up Pathfinder software so that PDM’s Bypass button actually
changes the IP routing, and removes PDM from your Livewire air chain.
Содержание PDM
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