Manual

Model 348 User Guide Issue 1, January 2020
Studio Technologies, Inc. Page 15
MODEL 348
INTERCOM STATION
“dimmed” (attenuated or reduced in level)
in certain circumstances. The function is
provided for special applications where the
headset’s left and right headphone outputs
are connected to an external amplifier or set
of amplified speakers. Normally when a talk
function is active on one or a combination
of the eight channels the level of the head-
set’s headphone output channels would not
change. As such, the default dim value has
been selected to be 0 dB. But if an adapter
cable was fabricated and the headset’s head-
phone output channels were connected to
audio playback devices that presented audio
energy in the same physical vicinity as the
active microphone then acoustic feedback is
possible. To prevent this from happening se-
lecting a dim configuration of 6, 12, or 18 dB
might be desirable.
Speaker – Source
Choices are Off, Monitor A, and Monitor B.
The Model 348 includes an internal loud-
speaker of which an audio source can be se-
lected from the two audio “mix” buses that are
named Monitor A or Monitor B. These buses
contain audio content that is specified in the
individual configuration choices for the eight
audio input channels. The speaker can be
designated to monitor either of these buses
or to not be active.
Speaker – Dim
Choices are 0 dB, 6 dB, 12 dB, and 18 dB.
The output level of the Model 348’s internal
loudspeaker will be automatically “dimmed”
(attenuated or reduced) whenever a talk
or IFB function is active on any of the eight
channels. This will help prevent audio from
the loudspeaker from interfering with the
operation of the selected microphone. In-
terference could be in the form of unwanted
audio content or even acoustical feedback.
It’s typical for a user who listens at a higher
output level to select a dim value that pro-
vides more reduction. In almost all cases a
selection of other than 0 dB (no dim) would
be appropriate.
Dante Monitor Outputs – Mode
Choices are Off, Pre-Fader, and Post-Fader.
The Model 348 provides two Dante transmit-
ter (output) channels, Monitor A and Monitor
B, that are intended for use by other pieces
of equipment such as amplified speakers,
audio consoles, and matrix intercom systems.
These two channels can be configured as a
group to function from among three choices.
Off: In this mode the two Dante monitor output
channels, Monitor A and Monitor B, will not
have audio present on them. The Dante
Controller software application will still in-
dicate that the channels are present but no
audio will be routed to them from the Model
348’s circuitry.
Pre-Fader: In this mode the audio level and
on/off status of Dante monitor output channels
will not be impacted by the Model 348’s moni-
tor output rotary encoder. To clarify, neither
level adjustment or on/off control will occur.
This mode is appropriate when the monitor
output channels are going to be utilized by
devices that incorporate, if required, level
control and/or signal muting capability.
Post-Fader: In this mode the audio level and
on/off status of Dante output channels Moni-
tor A and Monitor B will follow the action of
the Model 348’s monitor output rotary en-
coder. This mode is applicable if the device
or devices utilizing the Dante monitor outputs
require that the level of the source signals be
adjusted and/or muted using the Model 348’s
resources.