Manual

Issue 2, July 2018 Model 48D User Guide
Page 16 Studio Technologies, Inc.
The manner in which the back-panel LINK/
ACT, SYS, and SYNC LEDs light will de-
pend on the characteristics of the connect-
ed Ethernet signals and the configuration
of the unit’s Dante interfaces. On the front
panel the user is presented with four status
LEDs, a two-line (18 characters-per-line)
back-lit LCD display, and five pushbutton
switches. These resources are simple to
understand and should prove to be use-
ful during operation and troubleshooting.
Their operation will be highlighted in the
following sections of this guide.
To protect the long-term integrity of the
LCD display a “screen saver” mode will
always begin 30 seconds after the last
press of any of the pushbutton switches.
This mode consists of an alternating dis-
play of the Studio Technologies logo, the
Dante device name for Network A, and the
Dante device name for Network B. So that
an operator will always be able to return
a Model 48D to a known display location,
simultaneously pressing the left and right
pushbutton switches will always return the
unit to its screen saver mode.
Ethernet and Dante Status
LEDs
There are three status LEDs located
below each etherCON RJ45 receptacle
on the Model 48D’s back panel. They
perform identical functions for the two
Dante interfaces. A LINK/ACT LED will
light green whenever an active connec-
tion to a 100 Mb/s Ethernet network port
has been established. It will flash on and
off in response to data packet activity. The
SYS and SYNC LEDs display the operat-
ing status of the Dante interfaces and their
associated audio-over-Ethernet networks.
The SYS LEDs will light red upon Model
48D power up to indicate that the Dante
interfaces are not ready. After a short
interval they will light green to indicate that
their respective Ultimo integrated circuit
is ready to pass audio data with another
Dante device. The SYNC LEDs will light
red when their associated Ethernet in-
terface is not synchronized with a Dante
network. They will light solid green when
their associated interface is fully synchro-
nized with the connected Dante network
and an external clock source (timing refer-
ence) is being received. A SYNC LED will
slowly flash green if its associated Dante
interface is serving as the clock master for
the connected Dante network.
Front-Panel Status Indicators
There are four LED indicators visible on
the Model 48D’s front panel. Two of the
LEDs are associated with the status of
the operating power of the unit. The other
two provide an indication of the network
status and Dante clock operation of the
two Ethernet interfaces.
The LED labeled PoE will light green
whenever the unit is operating using power
provided by a PoE Ethernet connection
made to the Network A connection. The
LED labeled DC will light green when DC
is present and meets or exceeds 10 volts
DC. If the DC input voltage is between 9
and 10 volts the DC LED will flash to indi-
cate a low-voltage condition. If both LEDs
are lit this will indicate that redundant
power sources are present, however in
this situation PoE power will always supply
the Model 48D with its operating power.
The two network LEDs provide information
relating to operation of the two network
interfaces. They are, as expected, labeled
A and B. A network LED that is lit red