Manual

Issue 2, March 2020 Model 381 User Guide
Page 18 Studio Technologies, Inc.
MODEL 381
ON-AIR BELTPACK
the Dante talkback output channel; and the
Dante main output will be muted.
Latching
If the talkback button has been configured
for the latching mode its operation is a bit
different. Momentarily pressing (“tapping”)
the button will cause the talkback func-
tion to change states: off-to-on or on-to-off.
Whenever microphone audio is being sent
only to the Dante main output channel the
button will light green. The button will light
orange when the talkback function is en-
abled and microphone audio is being sent
out the Dante talkback output channel while
the Dante main output channel is muted.
Technical Notes
IP Address Assignment
By default, the Model 381’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 protocol 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, wheth-
er or not a DHCP server is active on the
LAN. Even two Dante-enabled devices that
are directly inter-connected using an RJ45
patch cord will, in most cases, correctly
acquire IP addresses and be able to com-
municate with each other.
Depending on the configuration of the
Headphone Output – Controls selection in
STcontroller, the level of the sidetone audio
will be determined either by the selected
value in the Fixed Sidetone Level configu-
ration or by adjustment of the right control,
labeled B, that is located on the top panel.
Typically, providing a precise sidetone level
is not important and most users will not
be concerned about setting it to a specific
value. But ensuring that the level of the side
tone audio is reasonable is important. Set-
ting the level too low will encourage a user
to speak too loudly; setting it too high and
the user will be tempted to speak hesitantly.
Talkback Button
The talkback pushbutton serves as both a
main output mute and a talkback enable
function. When talkback is active audio is no
longer sent out the Dante main output chan-
nel but instead is routed to the Dante talk-
back output channel. In this way the “on-air”
channel is muted and the talkback channel
is active. When the button’s LED is lit green
audio is being sent out the main output
channel and no audio is being sent out the
talkback output channel. The button’s LED
will light orange when the main output is
muted and audio is present on the talkback
output channel. The button’s specific action
in response to being pressed will depend on
its configuration as made using STcontroller.
Momentary
When the Talkback Button – Operation se
-
lection has been configured for Momentary
its functionality will be pretty self-explanato-
ry. When the talkback button is not pressed
its LED is lit green and audio is sent out the
Dante main output channel. Press and hold
the button to enable the talkback function.
When talkback is enabled its LED will be lit
orange, microphone audio will be sent out