Manual

Issue 1, January 2020 Model 348 User Guide
Page 28 Studio Technologies, Inc.
MODEL 348
INTERCOM STATION
Another STcontroller configuration setting al-
lows the monitor output channels to be auto-
matically dimmed (attenuated) when any of
the functions associated with the eight push-
button switches are active. This can help to
ensure that audio signals being reproduced
by externally connected amplified speakers
don’t interfere with audio that’s being picked
up by selected microphone.
Loudspeaker Output
The Model 348 contains a small loudspeaker
which is located on the right side of the front
panel. A configuration setting in STcontroller
selects the audio source or sources that are
to be sent to the loudspeaker. The choices
are Monitor A or Monitor B. Another configura-
tion selection allows the loudspeaker level to
automatically be dimmed (attenuated) when
any of the functions associated with the eight
pushbutton switches are active. This can help
to ensure that audio signals being reproduced
by the loudspeaker don’t interfere with audio
being picked up by the selected microphone.
Use the monitor rotary encoder knob to adjust
the level of the loudspeaker. Push the rotary
encoder’s knob to mute or unmute the loud-
speaker (and post-fader monitor outputs) as
desired.
Monitor Output Automatic Mute
As previously discussed twice in this guide,
a configuration setting in STcontroller al-
lows the loudspeaker and post-fader monitor
output channels to automatically mute when
the microphone source is selected for Head-
set (by default, this function is not enabled).
This can be useful for user’s who frequently
change from using a headset and associated
microphone to using a gooseneck micro-
phone and internal loudspeaker and/or moni-
tor output channels. The unneeded output,
either the headset’s headphone outputs or
the internal loudspeaker/post-fader monitor
output channels, will automatically mute as
the microphone source is switched. It’s simple
to observe this action by noting that the moni-
tor encoder’s knob will light purple when the
microphone source is selected for Headset.
The muting of the loudspeaker speaker and
post-fader monitor output channels can be
temporarily overridden by pressing the monitor
encoder knob.
Call Indication
The Model 348 can be configured to respond
to call signals that are present in any of the
eight Dante input channels. A 20 kHz tone
that’s in-band (part of the audio content in a
channel) will be detected as a call signal. Any
channel that is configured for Talk or Talk with
18 kHz Tone will respond to a call signal using
either a visual-only indication or by way of both
a visual and an audible (audio tone) indication.
The visual indication is displayed by flashing
the associated pushbutton switch’s orange
LED. The audible indication is created by
sending a continuous 3-burst sequence of
524 Hz sine wave tone to both the Dante
monitor output channels and the internal loud-
speaker. Using STcontroller there are individ-
ual configuration choices that allow the overall
level of the call tones to be independently
selected for Monitor A and Monitor B.
Technical Notes
IP Address Assignment
By default, each of the Model 348’s Ethernet
interfaces will attempt to automatically obtain
an IP address and associated settings using
DHCP (Dynamic Host Configuration Protocol).
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 Ad-
dressing (APIPA). It is also sometimes referred
to as auto-IP (PIPPA). Link-local will randomly