Manual

Model 362 User Guide Issue 1, September 2016
Studio Technologies, Inc. Page 13
The two pots are “push-in/push-out” type
which allow their associated knobs to be
in their “out” position to be adjusted and
their “in” position when protection from an
unwanted change is desired. Users should
find the headphone output audio quality
to be excellent, with high maximum output
level and low distortion. Analog audio sig-
nals do not pass directly through the level
pots. The position of the pots is recognized
by the Model 362’s processor which then
adjusts the signal level within the digital
domain.
Technical Notes
IP Address Assignment
By default the Model 362’s Ethernet inter-
face will attempt to automatically obtain an
IP address and associated settings using
DHCP (Dynamic Host Configuration Pro-
tocol). If a DHCP server is not detected an
IP address will automatically be assigned
using the link-local protocol. This proto-
col is known in the Microsoft® world as
Automatic Private IP Addressing (APIPA).
It is also sometimes referred to as auto-IP
(PIPPA). Link-local will randomly assign
a unique IP address in the IPv4 range of
169.254.0.1 to 169.254.255.254. In this
way multiple Dante-enabled devices can
be connected together and automatically
function, whether or not a DHCP server is
active on the LAN. Even two Dante-enabled
devices that are directly inter-connected us-
ing an RJ45 patch cord will, in most cases,
correctly acquire IP addresses and be able
to communicate with each other.
An exception does arise when trying to
directly interconnect two Dante-enabled
devices that each use the Ultimo integrated
circuit to implement Dante. The Model 362
uses the Ultimo “chip” and, as such, a di-
rect one-to-one interconnection to another
Ultimo-based product is not supported.
An Ethernet switch linking the two units is
required to successfully interconnect two
Ultimo-based devices. The technical rea-
son that a switch is required relates to the
need for a slight latency (delay) in the data
flow; an Ethernet switch will provide this.
Using the Dante Controller software ap-
plication the Model 362’s IP address and
related network parameters can be set for
a fixed (static) configuration. While this is a
more involved process than simply letting
DHCP or link-local “do their thing,” if fixed
addressing is necessary then this capabil-
ity is available. But in this case it’s highly
recommended that every unit be physi-
cally marked, e.g., directly labeled using a
permanent marker or “console tape,” with
its specific static IP address. If knowledge
of a Model 362’s IP address has been
misplaced there is no reset button or
other method to easily restore the unit
to a default IP setting.
In the unfortunate event that a device’s IP
address is “lost,” the Address Resolution
Protocol (ARP) networking command can
be used to “probe” devices on a network
for this information. For example, in Win-
dows OS the arp –a command can be
used to display a list of LAN information
that includes MAC addresses and cor-
responding IP addresses. The simplest
means of identifying an unknown IP ad-
dress is to create a “mini” LAN with a
small PoE-enabled Ethernet switch con-
necting a personal computer to the Model
362. Then by using the appropriate ARP
command the required “clues” can be
obtained.