STUDIO TECHNOLOGIES 342 Intercom Station User Guide
- June 5, 2024
- Studio Technologies
Table of Contents
342 Intercom Station
Model 342
Intercom Station
User Guide
Issue Preliminary 1, April 2022 This User Guide is applicable for serial
numbers M342-00151 and later with main firmware version 1.00 and later and
STcontroller application version 3.08.00 and later.
Copyright © 2022 by Studio Technologies, Inc., all rights reserved studio-
tech.com
50295-0422, Issue Preliminary 1
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Model 342
INTERCOM STATION
Table of Contents
Revision History …………………………………………………………………………………………… 4 Introduction
…………………………………………………………………………………………………. 5 Getting Started
…………………………………………………………………………………………….. 7 Dante Configuration
……………………………………………………………………………………… 8 Model 342 Configuration
………………………………………………………………………………. 10 Operation
…………………………………………………………………………………………………… 13 Technical Notes
…………………………………………………………………………………………… 15 Specifications
……………………………………………………………………………………………… 18 Appendix A: STcontroller Default
Configuration Values …………………………………….. 19
Model 342 User Guide Studio Technologies, Inc.
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Revision History
Issue Preliminary 1, April 2022:
· Initial preliminary release.
Model 342
INTERCOM STATION
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Model 342 User Guide Studio Technologies, Inc.
Model 342
INTERCOM STATION
Introduction
The Model 342 Intercom Station is a compact, desktop device that supports two
channels of talk and listen. The unit begins with the features offered by
traditional analog party-line (PL) intercom user devices and adds a range of
new capabilities, along with the advanced performance and flexibility that
Dante® audio-over-Ethernet provides. Over a standard IP network, multiple
Model 342 Intercom Station units and other compatible Studio Technologies’
products can be used to create party-line intercom applications with help from
an external Dante-enabled audio matrix such as the Studio Technologies’ Model
5421 or Model 5422A Dante Intercom Audio Engines. Alternately, Model 342 units
can be used “point-to-point” or interfaced with Dante-compatible matrix
intercom systems.
Only a single Power-over-Ethernet (PoE) connection is required for operation.
Key user features can be easily configured using the STcontroller software
application. Configurable parameters include electret microphone power,
microphone preamplifier gain, talk button operation, status LED action and
intensity, sidetone operation, and headphone channel assignment. Hardware
features include dual-channel (stereo) headphone output, dual headset
connectors, integrated sidetone, call signal receive display, and remote mic
kill (“talk off”). The range of capabilities, along with the excellent audio
quality supported by the digital audio path, offers a unique and powerful user
experience.
Setting up and configuring a Model 342 is simple. An etherCON® RJ45 receptacle
is used to interconnect with a standard twisted-pair Ethernet port associated
with a local-area network (LAN). This connection provides both power and
bidirectional digital audio. The unit is compatible with both broadcast and
“gaming” headsets. A “professional” broadcast or intercom-style headset with a
dynamic or electret (DC-powered) microphone can be interfaced with a Model 342
using a 5-pin XLR connector. The Model 342 also directly supports connection
of earbuds or gaming headsets that utilize a 3.5 mm 4-conductor (TRRS) CTIA-
compliant plug. These moderately priced devices, commonly associated with
mobile phones or personal computers, are often of high quality and may be the
preferred headset for some applications. With the Model 342’s moderate price
and ability to support a broad range of headsets, the overall cost of
deploying a high-performance intercom system can often meet budget goals.
The STcontroller software application is used to select the Model 342’s
operating parameters. Versions are available, free of charge, that support the
Windows® and macOS® operating systems. The two LED-illuminated talk pushbutton
switches can be independently configured for optimal operation. Two “push-in
/push-out” (“pop-out”) rotary controls make it easy to set and maintain the
desired head-
Model 342 User Guide Studio Technologies, Inc.
Figure 1. Model 342 Intercom Station front and back views
phone output level. The Model 342’s compact enclosure is made from steel which
offers both stability and ruggedness.
The audio quality of the Model 342 is excellent, with low distortion, low
noise, and high headroom. Careful circuit design and rugged components ensure
long, reliable operation. A wide range of applications can be supported,
including education and commercial theater, sports and entertainment TV and
radio events, streaming broadcasts, house-of-worship, corporate and government
AV, post production, and aerospace.
Dante Audio-over-Ethernet
Audio data is sent to and received from the Model 342 using the Dante audio-
over-Ethernet media networking technology. As a Dante-compliant device, the
Model 342’s two Dante transmitter (output) and two Dante receiver (input)
channels will be routed (subscribed) with other devices using the Dante
Controller software application. The digital audio’s bit depth is up to 24
with a sampling rate of 48 kHz. The Model 342 is AES67-compliant and is
compatible with the Dante Domain ManagerTM (DDM) software application.
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Model 342
INTERCOM STATION
Dual-color LEDs provide status indications of the Dante interface. The Dante
Identify command can take on a unique role with the Model 342. Not only can it
cause the two talk pushbutton switches to light orange in a highly visible
sequence, it can be configured to turn off (“kill”) the talk functions if
either or both are active.
Audio Quality
The Model 342 offers “pro” audio performance that is not found in typical
party-line (PL) intercom devices. A lownoise, wide dynamic-range microphone
preamplifier and associated voltage-controlled-amplifier (VCA) dynamics
controller (compressor) ensures that microphone audio quality is preserved
while minimizing the chance of signal overload. DC power to support electret
microphones can be enabled as required. The output of the microphone preamp
and compressor is routed to an analog-to-digital converter (ADC) section that
supports a sampling rate of 48 kHz with a bit depth of up to 24. The audio
signal, now in the digital domain, travels through the processor and on to the
Dante interface section where it is packetized and prepared for transport over
Ethernet.
Audio input signals arrive via two Dante receiver (input) channels. The
supported sampling rate is 48 kHz with a bit depth of up to 24. The audio
signals pass into the Model 342’s processor where channel routing, headphone
level control, and sidetone creation are performed within the digital domain.
This provides flexibility, allowing precise control of the audio signals and
eliminating the need for the two rotary level controls from having to directly
handle analog audio signals. The audio signals destined for the 2-channel
headphone output are sent to a highperformance digital-to-analog converter and
then on to robust driver circuitry. High signal levels can be provided to a
variety of headsets.
Call Receive Function
A call receive function allows Model 342 users to be provided with a visual
indication that a call signal is active on a Dante receiver (input) channels.
The cadence of the visual indication can be configured to meet an
application’s needs. Using 20 kHz tones, the call signals are sent within the
Dante audio channels (“in band”) allowing interoperability between multiple
Studio Technologies’ beltpack units, as well as being compatible with legacy
party-line intercom systems. Call signals can be useful to indicate to users
that they are needed “on headset” or should be actively listening to an
intercom channel. The call function can also be used to provide real-time cues
to production personnel during the running of live events.
Configuration Flexibility
A highlight of the Model 342 is its ability to be easily configured to meet
the needs of specific users and applications.
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All configuration choices are made using the STcontroller software application
that communicates with the Model 342 by way of an Ethernet network connection.
Configurable parameters include microphone power and preamplifier gain,
headphone monitoring, sidetone operation, call receive cadence, and talk
button operation.
The microphone input can be selected for compatibility with dynamic or
electret (DC-powered) microphones. The gain of the microphone preamplifier can
be selected from among five choices. These choices allow compatibility with
the variety of microphones that are part of broadcast, intercom, and computer
gaming headsets.
To support optimum user performance, the Model 342’s two talk pushbutton
switches can be independently configured from among four choices: Push to
Talk, Latching, Push to Talk/Tap to Latch, or Disabled. Two audio channels
arrive via Dante receiver (input) channels and are destined for the 2-channel
headphone output. Each input source can be independently routed to the left
headphone channel, right headphone channel, or both the left and right
headphone channels. This flexibility allows a variety of listening
environments to be created, including stereo, dual-channel monaural, and
single-channel monaural.
Ethernet Data and PoE
The Model 342 connects to an Ethernet data network using a standard 100 Mb/s
twisted-pair Ethernet interface. The physical interconnection is made by way
of a Neutrik® etherCON RJ45 receptacle. While compatible with standard RJ45
plugs, etherCON allows a ruggedized and locking interconnection for harsh or
high-reliability environments. An LED, located on the unit’s back panel,
displays the status of the network connection.
The Model 342’s operating power is provided by way of the Ethernet interface
using the 802.3af Power-over-Ethernet (PoE) standard. This allows fast and
efficient interconnection with an associated data network. To support PoE
power management, the Model 342’s PoE interface reports to the power sourcing
equipment (PSE) that it’s a class 1 (very low power) device.
Future Capabilities and Firmware Updating
The Model 342 was designed such that its capabilities and performance can be
enhanced in the future. A USB connector, located on the unit’s main circuit
board (underneath the unit’s cover), allows the application firmware (embedded
software) to be updated using a standard USB flash drive. The Model 342 uses
the UltimoX2TM integrated circuit from Audinate to implement its Dante
interface. The firmware in this integrated circuit can be updated via the
Ethernet connection, helping to ensure that its capabilities remain up to
date.
Model 342 User Guide Studio Technologies, Inc.
Model 342
INTERCOM STATION
Getting Started
What’s Included
Included in the shipping carton are a Model 342 Intercom Station and
information on how to obtain an electronic copy of this guide. As a device
that is Power-over-Ethernet (PoE) powered, no external power source is
provided. In most applications, an Ethernet switch with the required PoE
capability will be utilized.
Connections
In this section, signal interconnections may be made using the three
connectors located on the back of the Model 342’s enclosure. An Ethernet data
connection with Power-over-Ethernet (PoE) capability will be made using either
a standard RJ45 patch cable or an etherCON protected RJ45 plug. A dual-channel
or single-channel (dual- or single-ear) headset will be connected using a
cable-mounted 5-pin male XLR connector. Alternately, a headset with a 3.5 mm
4-conductor TRRS plug can be used. (The headset’s plug needs to follow the
CTIATM/AHJ configuration standard.)
Ethernet Connection with PoE
A 100BASE-TX Ethernet connection that supports Power-over-Ethernet (PoE) is
required for Model 342 operation. This one connection will provide both the
Ethernet data interface and power for the Model 342’s circuitry. A 10BASE-T
connection is not sufficient. A 1000BASE-T (GigE) connection is not supported
unless it can automatically “fall back” to 100BASE-TX operation. The Model 342
supports Ethernet switch power management, enumerating itself as a PoE class 1
device. Any PoE source that is compliant with the IEEE® 802.3af standard will
function correctly. Should the selected Ethernet switch port support Energy-
Efficient Ethernet (EEE) it must be disabled to help ensure reliable Dante
operation. (This is applicable for all Dante-compatible products.)
The Ethernet connection is made by way of an etherCON RJ45 jack that is
located on the Model 342’s back panel. This allows connection by way of a RJ45
plug that’s part of a typical Ethernet “patch cable.” Alternately, a twisted-
pair data cable terminated with an etherCON plug can be utilized. A crossover
cable will never be required as the Model 342’s Ethernet interface supports
auto MDI/MDI-X. The maximum cable distance is 100-meters (325-feet) for
twisted-pair Ethernet cabling.
Headset Connections
The Model 342 allows two different types of headsets to be connected. A 5-pin
female XLR connector is provided on the unit’s back panel to support
connection of a “professional” broadcast- or intercom-style communications
headset.
A 3.5 mm 4-conductor TRRS jack allows a computer gaming headset to be directly
connected. The Model 342’s two headset connectors are electrically wired in
parallel. As such, only one type of headset should be connected at one time.
Headset A The Model 342 provides a 5-pin female XLR connector that interfaces
with the microphone and headphone connections of a single- or dual-ear
intercom- or broadcast-style headset. The connector is labeled Headset A.
Refer to Figure 2 for connection details. The microphone input connections are
compatible with most unbalanced dynamic or electret (low-voltage DC-powered)
microphones. A balanced dynamic microphone should, in most cases, also
function correctly if its signal (low) is connected to Model 342’s mic in
/shield connection. No support is provided for microphones that require P12
or P48 phantom power. To allow users of stereo (dual-earpiece or “double
muff”) headsets to hear a monaural version of the two headphone output
channels does not require special wiring of the 5-pin male XLR mating
connector. The headset’s left headphone channel should always be wired to pin
4 and the right headphone channel to pin 5. Configuration choices, discussed
in a later section, can then be used to create the desired monaural output.
It’s important not to connect together (short) pins 4 and 5 of the headset’s
connector as damage to the Model 342’s output circuitry could result. A
monaural (single-earpiece or “single muff”) headset should be wired such that
its headphone is wired only to pin 4; pin 5 should be remain unused.
Configuration choices, discussed in a later section, can be used to create a
single-channel monaural output.
Figure 2. Headset A connection pinout chart
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Model 342
INTERCOM STATION
It’s possible that some beyerdynamic headset interconnecting cable assemblies
terminate the earpiece’s left and right connections opposite from what the
Model 342 and other broadcast equipment require. These cables may terminate
the left earpiece to pin 5 of a 5-pin male XLR connector and the right
earpiece to pin 4. If this condition is present, it will require reversing or
“flipping” the two wires in the headset’s connector such that the left
earpiece connects to pin 4 and the right earpiece to pin 5.
If a separate microphone and pair of headphones need to be connected then an
adapter cable assembly should be fabricated. It would consist of a 5-pin male
XLR connector wired to both a 3-pin female XLR connector for the microphone
and a ¼-inch or 3.5 mm TRS jack for the headphones. In this scenario, the
microphone would, in most cases, be a dynamic type as the Model 342 provides
only low-voltage DC “electret” power. Most hand-held or “stick” microphones
are dynamic and should function correctly. But phantom-powered (P12 or P48)
microphones would not be compatible.
Headset B The Model 342 also allows direct connection of gaming headsets that
are ubiquitous in the personal computer world. The 3.5 mm 4-conductor (TRRS)
jack, labeled Headset B, is compatible with the CTIA/AHJ configuration
standard which has the headphone left channel on the tip connection, the
headphone right channel on the ring 1 connection, common on the ring 2
connection, and the microphone on the sleeve connection. Compatible headsets
are readily available, typically described as “personal computer” or “gaming”
headsets. The microphones used in these headsets are electret type which
require a low-voltage DC source for operation. The Model 342 is able to
provide this power and requires only that the appropriate setting in
STcontroller be selected. Refer to Figure 3 for a detailed description of the
compatible 3.5 mm plug.
Figure 3. Headset B (TRRS) connection pinout chart
Dante Configuration
For audio to pass to and from the Model 342 requires that several Dante-
related parameters be configured. These configuration settings will be stored
in non-volatile memory within the Model 342’s circuitry. Configuration will
typically be done with the Dante Controller software application, available
for download free of charge at audinate.com. Versions of Dante Controller are
available to support various personal computer operating systems. The Model
342 uses the UltimoX2 2-input/2-output integrated circuit to implement its
Dante interface. The unit is compatible with the Dante Domain Manager (DDM)
software application.
Audio Routing
The two Dante receiver (input) channels associated with the Model 342 need to
be routed (subscribed) to Dante transmitter (output) channels on associated
equipment. Configuration settings in the STcontroller software application
allow these two audio sources to be sent to the Model 342’s 2-channel
headphone output. The Model 342’s two Dante transmitter (output) channels must
be routed (subscribed) to Dante receiver (input) channels on associated
equipment. This achieves routing the Model 342’s two talk output audio
channels to the device (or devices) that will be “listening” to them.
Within Dante Controller, a “subscription” is the term used for routing a
transmitter channel or flow (a group of up to four output channels) to a
receiver channel or flow (a group of up to four input channels). The number of
transmitter flows associated with an UltimoX2 integrated circuit is limited to
two. These can either be unicast, multicast, or a combination of the two. If
the Model 342’s transmitter (output) channels need to be routed using more
than two flows it’s possible that an intermediary device, such as the Studio
Technologies’ Model 5422A Dante Intercom Audio Engine, can be used to “repeat”
the signals.
Unit and Channel Names
The Model 342 has a default Dante device name of ST-M342- followed by a unique
suffix. The suffix identifies the specific Model 342 that is being configured.
The suffix’s actual alpha and/or numeric characters relate to the MAC address
of the unit’s UltimoX2 integrated circuit. The Dante transmitter (output)
channels have the default names of Ch1 and Ch2. The two Dante receiver (input)
channels have default names of Ch1 and Ch2. Using the Dante Controller
application, the default device name and channel names can be revised as
appropriate for the specific application.
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Model 342 User Guide Studio Technologies, Inc.
Model 342
INTERCOM STATION
Device Configuration
The Model 342 only supports an audio sample rate of 48 kHz with no pull-up
/pull-down values available. The audio encoding is fixed for PCM 24. Device
Latency and Clocking can be adjusted if required but the default value is
typically correct.
Network Configuration IP Address By default, the Model 342’s Dante IP
address and related network parameters will be determined automatically using
DHCP or, if not available, the link-local network protocol. If desired, Dante
Controller allows the IP address and related network parameters to be manually
set to 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 capability is available. In this case, it’s highly
recommended that a unit be physically marked, e.g., directly using a permanent
marker or “console tape,” with its specific static IP address. If knowledge of
a Model 342’s IP address has been misplaced there is no reset button or other
method to easily restore the unit to a default IP setting.
AES67 Configuration AES67 Mode The Model 342 can be configured for AES67
operation. This requires the AES67 Mode to be set for Enabled. By default,
AES67 mode is set for Disabled. Note that in the AES67 mode the Dante
transmitter (output) channels will function in multicast; unicast is not
supported.
Model 342 Clocking Source While technically the Model 342 can serve as a
Leader clock for a Dante network (as can all Dante-enabled devices) in
virtually all cases the unit will be configured to receive “sync” from another
device. As such, the check box for Preferred Leader associated with the Model
342 would not be enabled.
Model 342 User Guide Studio Technologies, Inc.
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INTERCOM STATION
Model 342 Configuration
The STcontroller software application is used to configure the way in which
the Model 342 functions. No DIP switch settings or other local actions are
used to configure the unit. This makes it imperative that STcontroller be
available for convenient use on a personal computer that’s connected to the
related LAN.
Installing STcontroller
STcontroller is available, free of charge, on the Studio Technologies’ website
(studio-tech.com). Versions are available that are compatible with personal
computers running selected versions of the Windows and macOS operating
systems. If required, download and install STcontroller onto a designated
personal computer. This personal computer must be on the same local area
network (LAN) and subnet as the Model 342 units that are to be configured.
Immediately after starting STcontroller the application will locate all the
Studio Technologies’ devices that it can control. The one or more Model 342
units to be configured will appear in the device list. Use the Identify
command to allow easy recognition of a specific Model 342 unit. Double-
clicking on a device name will cause the associated configuration menu to
appear. Review the current configuration and make any changes that are
desired.
Changes made using STcontroller will be immediately reflected in the unit’s
operation; no Model 342 reboot is required. Each time a change is made the two
talk pushbutton switches, located on the Model 342’s front panel, will flash
orange to indicate that a command from STcontroller has been received.
Parameters
Microphone Input Electret Power Choices are Enabled or Not Enabled (box
checked or not).
Enable the Electret Power check box if the connected headset has an electret
microphone that requires a source of low-voltage DC power for operation. The
electret power on/off status is displayed by way of a red LED, labeled MIC
PWR, that is located on the back of the Model 342’s enclosure adjacent to the
headset connector. Whenever the PWR LED is lit, 3.3 volts DC is being provided
to the headset connectors.
In virtually all cases, gaming or computer headsets that use a 3.5 mm TRRS
plug will require microphone power. If the associated headset has a dynamic
(non-powered) microphone do not enable the Electret Power check box. Most
broadcast headsets that terminate on 5-pin male XLR connectors will not
require microphone power.
Note that the Model 342 cannot supply P12 or P48 phantom power that may be
required for balanced condenser (capacitor) microphones. This should not pose
an issue as this type of microphone is essentially never associated with a
headset that would be used for intercom applications.
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Model 342 User Guide Studio Technologies, Inc.
Model 342
INTERCOM STATION
Microphone Input Gain Choices are 24 dB, 30 dB, 36 dB, 42 dB, and 48 dB.
Electret microphones typically have a relatively high output level due to
their internal preamplifier circuitry. As such, a moderate amount of
preamplifier gain may be required. Selecting the 24 dB or 30 dB gain setting
will probably be appropriate in these cases.
Dynamic microphones have an output level that is typically lower than that
provided by electret microphones. As such, the 36 dB, 42 dB, or 48 dB gain
settings will, in many cases, be appropriate for them. The 42 dB gain setting
is often a good starting point. The 36 dB choice may be correct should a
connected dynamic microphone have a high sensitivity (high output level for a
given acoustical input) or is associated with an enthusiastic user that
routinely talks loudly into the microphone. Setting the gain for 48 dB may be
helpful in some applications, such as with headsets that have a dynamic
microphone with a low output level. The 48 dB gain setting may also be useful
when the Model 342 is going to be deployed at events where users are not able
to speak at normal levels, e.g., sporting events such as golf tournaments
where “whispering” may be necessary.
The compressor active LED, labeled COMP and visible on the unit’s back panel
adjacent to the HEADSET A connector, can act as a guide when setting the
microphone preamplifier gain. During normal talk operation the compressor
active LED should light intermittently. If, for example, with a dynamic
microphone the LED rarely lights and the preamp gain is set to 42 dB it might
be a good idea to change it to 48 dB. If the COMP LED is lit fully during
normal talking in a situation where the headset has an electret microphone and
the gain is set for 30 dB, changing it to 24 dB might be warranted.
Button Operation Channel 1 Choices are Push to Talk, Latching, Push to
Talk/Tap to Latch, and Disabled.
This configuration allows how the Talk 1 pushbutton switch will function. Four
modes are available.
Push to Talk: When this mode is selected, the operation is self-explanatory.
Only when the Talk 1 button is pressed and held will talk audio be sent out
the associated Dante transmitter (output) channel.
Latching: When this mode is selected, tapping (momentarily pressing) the Talk
1 button will cause the function to “latch” into the talk active mode. Tapping
the button again will cause the function to “unlatch” and Talk 1 will no
longer be active.
Push to Talk/Tap to Latch: When this mode is selected a “hybrid” function of
sorts is enabled. Pressing and holding the talk button will enable audio to be
connected to the associated Dante transmitter (output) channel. When the
button is released, audio will stop being sent to the transmitter channel.
Tapping (momentarily pressing) the button will cause the function to “latch”
into the talk active mode. Tapping the button again will cause the function to
“unlatch” and talk will no longer be active.
Disabled: Selecting this mode causes the Talk 1 function to never connect
audio to the associated Dante transmitter (output) channel.
Many applications will be best served when the button is configured for the
Push to Talk mode. This ensures that the channel can’t accidentally be left in
its talk active condition. However, there are certainly valid situations when
the Latching mode or Push to Talk/Tap to Latch mode settings will prove to be
very useful. Selecting the Disabled mode could be useful if a “listen-only”
channel is desired.
Button Operation Channel 2 Choices are Push to Talk, Latching, Push to
Talk/Tap to Latch, and Disabled.
This configuration determines how the Talk 2 pushbutton switch will function.
Four modes are available. The manner in which these modes function is
identical to those for the Talk 1 pushbutton switch. Details were provided in
the previous section.
Button Operation LED Action Choices are Red when Off/Green when On and Unlit
when Off/ Green when On.
The action of the red and green LED indicators associated with the two talk
pushbutton switches can be configured. (There are two red and two green LEDs
in each of the pushbutton switches.) The action of the LEDs in the talk
pushbutton switches are configured as a group, all acting in the same manner.
The second choice was specifically provided to support users who have
limitations in their ability to discern between two colors (“color
blindness”).
Red when Off/Green when On: The LEDs in both of the talk pushbutton switches
will light red when its associated function is off (not active). The LEDs in
each pushbutton switch will light green when its associated function is on
(active).
Unlit when Off/Green when On: The LEDs in both of the talk pushbutton switches
will not light when its associated function is off (not active). The LEDs in
each pushbutton switch will light green when its associated function is on
(active).
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INTERCOM STATION
Button Operation LED Intensity Choices are High and Low.
The two pushbutton switches have LED indicators associated with them. The LED
intensity configuration choice allows the overall intensity of these LEDs to
be selected. Deciding which choice, High or Low, is optimal will typically
depend on the amount of ambient light that is present in the area where the
Model 342 located.
Headphone Output Channel Routing Choices are Left, Right, and Left and
Right.
Two Dante transmitter (output) channels can be assigned to the Model 342’s two
Dante receiver (input) channels using the Dante Controller application. How
these two audio signals, called 1 and 2, are routed to the Model 342’s left
and right headphone output channels can be independently configured. For
flexibility, each input source has three routing options. They can be
configured for sending only to the left channel, only to the right channel, or
sending to both the left and right headphone output channels.
In some applications, stereo or what might be called split-mono operation will
be desired. In this case, input channel 1 might be routed to the left
headphone output while input channel 2 might be routed to the right headphone
output. When using a stereo or dual-ear headset, routing input 1 and input 2
to both headphone output channels is often referred to as creating a dual-
channel monaural output. If a monaural (“single muff”) headset is used the
Left configuration option allows both input channel 1 and input channel 2 to
be combined to monaural and sent out only the left headphone output channel.
Sidetone Level Choices are High, Medium High, Medium, Medium Low, Low, and
Off.
The Model 342 includes a sidetone function that allows microphone audio coming
from the microphone preamplifier and associated compressor circuit to be sent
to the headphone output. This serves as a user confirmation that they are
actively sending audio out one or both of the intercom output channels. To
clarify, sidetone audio will only be routed to the headphone output when
either or both of the talk channels is active.
If Dante input signals are routed to both the left and right headphone output
channels then sidetone audio will be sent to both the left and right headphone
output channels. If the input channels are routed only to the left headphone
output channel then sidetone audio will also only be sent to the left
headphone output channel. (This protects the right headphone output channel
should it be connected to common due to a wiring abnormality.)
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The level of the sidetone audio can be selected from among five values. The
correct value is simply the one that makes the user most comfortable. Sidetone
audio can also be disabled by selecting Off. Selecting Off would be useful in
the unlikely situation where user talk audio is returned as part of their
listen audio signals. It can also find use in special applications such as
during troubleshooting. The two rotary level controls associated with the
intercom listen channels will not impact the sidetone level.
System Mic Kill Choices are Off, Device ID, Global Kill Command, and Device
ID/Global Kill Command.
The mic (microphone) kill function allows a networkprovided message to
automatically disable either or both of the talk channels if they are
“latched” on. Specifically, it’s possible to remotely change an active (on)
talk channel to its off state. This function is also sometimes referred to as
a “talk off” function. There are two means available to remotely disable
either or both active talk channels. The Device ID method uses the
identification command generated by the Dante Controller or STcontroller
applications as a means to disable an active talk channel. The Global Kill
Command method uses the Studio Technologies’ Global Mic Kill command that is
available from a menu choice in the STcontroller software application. This
will cause all Studio Technologies’ units that are configured to follow this
command to respond by turning off any active channels. Either mic kill method
can be selected to function individually or both can be selected to be
recognized. Selecting Off simply means that no remote mic kill method is
supported.
System Call Indication Choices are Off, Flash, Solid, and Flash then Solid.
The Call Indication configuration allows the manner in which the two talk
pushbutton switches will light when a call signal is detected on their
respective Dante receiver (input) channel. Technically, a call is detected as
being active when a 20 kHz nominal audio tone is present in an audio signal
path. It would typically be a sine- or square-wave signal that’s combined with
voice audio.
Off: When this mode is selected and a call signal is detected in a Dante
receiver (input) channel then the LEDs in the associated pushbutton switch
will not light.
Flash: In this mode, the LED in a pushbutton switch will flash orange if a
call signal is detected and the channel’s talk function is not active. If the
channel’s talk function is active when a call signal is detected then the LED
in the button will flash alternately green and orange. (Green indicates that
the talk function is active and orange indicates that a call signal is being
detected.)
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Model 342
INTERCOM STATION
Solid: When this mode is selected, the LED in a pushbutton button will light
orange when a call signal is detected; it will light orange whether or not the
talk function associated with that button is active.
Flash then Solid: In this mode, the LED in a pushbutton switch will first
flash orange (or green and orange) for a few seconds and then light solid
orange, remaining lit orange until the call signal is no longer present.
Operation
At this point, everything should be ready and Model 342 operation can
commence. An Ethernet connection with Power-over-Ethernet (PoE) capability
should have been made. A headset terminated with a cable-mounted 5-pin male
XLR connector may be plugged into the Headset A connector. Alternately, a
gaming or computer-type headset will be connected to Headset B using a 3.5 mm
4-conductor TRRS plug.
The Model 342’s Dante configuration settings should have been selected using
the Dante Controller software application. In this way, the Model 342’s two
Dante transmitter (output) channels and two Dante receiver (input) channels
should have been routed, by way of Dante subscriptions, to the receiver and
transmitter channels on associated Dante-enabled equipment. Using the Studio
Technologies’ STcontroller software application, the unit’s configuration
should have been selected to meet the needs of the specific application.
Initial Operation
The Model 342 will start to function as soon as a Power-over-Ethernet (PoE)
power source is connected. However, it may take 20 to 30 seconds for full
operation to commence. Upon initial power-up, the three status LEDs, located
on the back panel below the etherCON RJ45 receptacle, will begin to light as
network and Dante connections are established. The compressor active LED might
somewhat randomly flash for a brief period. The green and orange LEDs that
illuminate the talk pushbutton switches will light as part of a short test
sequence to indicate that the application firmware (embedded software) has
started. The mic power LED will also light for a short interval to indicate
that it is functioning. Once the test sequence has completed and the Dante
connection has been established full operation will begin.
Ethernet and Dante Status LEDs
Three status LEDs are located below the etherCON RJ45 receptacle on the Model
342’s back panel. The LINK ACT LED will light green whenever an active
connection to a 100 Mb/s Ethernet network has been established. It will flash
in response to Ethernet data packet activity. The SYS and SYNC LEDs display
the operating status of the Dante
Model 342 User Guide Studio Technologies, Inc.
interface and associated network. The SYS LED will light red upon Model 342
power up to indicate that the Dante interface is not ready. After a short
interval it will light green to indicate that it is ready to pass data with
another Dante device. The SYNC LED will light red when the Model 342 is not
synchronized with a Dante network. It will light solid green when the Model
342 is synchronized with a Dante network and an external clock source (timing
reference) is being received. It will slowly flash green when this specific
Model 342 is serving as the Leader clock for the network of Dante devices.
(Typically, the Model 342 should not be serving as the Leader clock!) It’s
possible that up to 30 seconds may be required for the SYNC LED to reach its
final state.
Compressor Active LED
A yellow LED indicator is located on the back panel adjacent to the Headset A
connector. Labeled COMP, the LED displays the status of the microphone
preamplifier compressor function. It will light whenever the input level from
the microphone, along with the configured preamplifier gain, is such that the
dynamic range of the talk signal is being controlled. It’s perfectly
acceptable for this LED to light intermittently whenever a user is talking at
a normal voice level into the connected microphone. But if the COMP LED lights
solid while a user is talking at a normal voice level this will typically
indicate that the mic preamp gain setting should be reduced. Conversely, if
the COMP LED almost never lights when normal talking is taking place, it’s
possible that changing the mic preamp gain to the higher setting would be
beneficial. Note that due to the design of the circuitry the compressor active
LED will function whether or not a talk channel is active.
Headphone Output
Two rotary potentiometers (“pots”), located on the Model 342’s front panel,
allow individual adjustment of the level of the two audio input signals as
they are sent to the 2channel headphone output. Depending on the configuration
of the unit, each audio input can be sent to the left channel, the right
channel, or both the left and right channels of the headphone output. The pots
are “push-in/push-out” type which allow their associated knobs to be in their
“out” position to be adjusted and then moved to 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. Audio signals do not pass
directly through the level pots. The position of the pots is recognized by the
Model 342’s processor which then adjusts the signal level within the digital
domain. When a pot is in its fully counterclockwise position the associated
audio signal is fully muted. The on or off status of a talk channel does not
impact the headphone output.
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INTERCOM STATION
Button Operation
Two pushbutton switches are associated with the Model 342’s two talk channels.
How the switches function will depend on the configuration of the unit.
Push to Talk: When a button has been configured for the Push to Talk mode how
it functions should be selfexplanatory. Press and hold the button when headset
microphone audio is to be sent out its associated Dante transmitter (output)
audio channel. The button’s green LED will light to indicate that the output
is active. Depending on the unit’s configuration, the button will either be
red or not lit when the function is not active.
Latching: If a button has been configured for Latching mode operation
momentarily pressing (“tapping”) it will cause the function to change states:
off-to-on or on-to-off. Whenever the talk function is active the button LED
will light green. Depending on the unit’s configuration, the button will
either be red or not lit when the function is not active.
Push to Talk/Tap to Latch: If a button has been configured for the Push to
Talk/Tap to Latch mode operation it is a bit different and certainly more
flexible. Press and hold the button to activate the associated talk function.
When released the talk function will turn off. Momentarily pressing
(“tapping”) the button will cause the function to change states: off-to-on or
on-to-off. Whenever the associated talk function is active the pushbutton will
light green. Depending on the unit’s configuration, the button will either be
red or not lit when the function is not active.
Disabled: A button that is configured to the Disabled mode will not allow talk
audio to be sent to its associated Dante transmitter (output) channel. To
provide “feedback” that the button has been pressed the button’s red LED will
flash rapidly three times. This says, in effect, “Yes, I recognize that you
pressed the button but I’m not going to do anything in response!”
Sidetone Function
The Model 342’s sidetone function can send microphone audio to the headphone
output whenever either or both of the talk functions are active. The quality
of the sidetone audio should be excellent and will provide Model 342 users
with a confidence signal that they are actively talking to other intercom
users. Sidetone audio will typically be sent to both the left and right
headphone output channels. This is because the function is trying to simulate
what a user would hear if they didn’t have a headset covering both their ears.
An exception is if both Dante receiver (input) channels are routed only to the
left headphone output channel. In this case, sidetone audio will only be sent
to the left headphone output channel.
The exact sidetone level is configured from among five values within the
STcontroller application. There is also a selection choice for turning off
sidetone. There is no means of adjusting the sidetone level using a physical
button or control on the Model 342 unit; the buttons or headphone level
controls on the front panel of the unit do not impact the sidetone level.
In most cases, the exact sidetone level setting is not critical and users will
not be concerned about revising it. But setting the sidetone level to
something reasonable is important. Setting the level too low will encourage
users to speak too loudly; setting it too high and users will be tempted to
speak hesitantly. And while users aren’t provided with a sidetone level
control or other adjustment means, should the need arise STcontroller allows
rapid adjustment of the sidetone level. In most cases, the Medium sidetone
configuration should provide an appropriate level.
Call Detection Display
A Model 342 function allows a call signal that’s present on either Dante
receiver (input) channel to cause it’s associated pushbutton switch’s LED to
light. Whenever a Dante receiver (input) channel receives a valid 20 kHz
nominal call signal the action of the associated button’s LED will follow the
unit’s call indication configuration. This one configuration will impact the
action of both buttons. If the call indication function has been configured
for Disabled a button’s LED will not respond to the presence of a call signal.
If the call indication configuration has been selected for Flash then a
button’s LED will flash orange when a call signal has been detected on its
associated audio input and the talk function is not active. If a call tone is
detected when the talk function is active then the associated button’s LED
will flash, alternating between green and orange. If the call indication has
been configured for Solid then a button’s LED will light orange whenever a
call signal is detected. If Flash then Solid is selected for the call
indication configuration a button’s LED will first flash orange (or orange and
green if the talk function is active) and then light solid orange.
Technically, a call signal is achieved by sending a 20 kHz audio tone on the
desired Dante audio channel. This signal is summed (mixed) with normal talk
audio. The Model 342’s two audio input channels continually monitor the audio
input for the presence of 20 kHz.
The detection circuitry will not confuse normal talk audio signals with a call
signal. Digital filters within the Model 342’s processor integrated circuit
help to ensure that false call detection won’t take place. Digital filtering
is also performed on the microphone audio output signals as well as the Dante
receiver (input) channels before they
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INTERCOM STATION
are sent to the headphone outputs. This prevents users with extended high-
frequency sensitivity, such as hosts and guests associated with dog shows,
from receiving undesirable audio content.By using a 20 kHz tone for call
signaling the Model 342 is compatible with legacy intercom equipment,
including the venerable RTS BP-325 beltpack. When interconnecting Model 342
and BP-325 units using an appropriate Dateenabled interface, such as the
Studio Technologies’ Model 545DR Intercom Interface, call signaling is fully
compatible. Compatibility with the Clear-Com® method of call functionality is
also possible by using the Model 545DC Intercom Interface. (It converts the DC
call signal associated with pin 3 of a Clear-Com party-line circuit to a 20
kHz tone.) Also, devices such as the Studio Technologies’ Model 544D Audio
Interface, Model 5304 Intercom Station, and Model 348 Intercom Station will
send and receive 20 kHz signals that are compatible with the Model 342. The
Model 544D converts its GPI (general-purpose input) signals to 20 kHz tones
and sums them with the audio signals which are then transported “in band” via
the Dante audio paths.
How to Identify a Specific Model 342
Both the Dante Controller and STcontroller software applications offer a
command that can be used to help locate a specific Model 342. When the
Identify command is selected it will send a message to a single Model 342
unit. On that specific unit the LEDs in the two pushbutton switches will
rapidly flash orange. In addition, the SYS and SYNC status LEDs, located
directly below the etherCON RJ45 receptacle on the back panel, will slowly
flash green. After a few seconds, the LED identification pattern will cease
and normal Model 342 button LED and Dante status LED operation will resume.
Mic Kill Support
The Model 342 includes a mic kill function, allowing either or both talk
pushbutton switches, if placed in their enabled (on) state, to be remotely
forced to their disabled (off) state. This function is sometimes referred to
as a “talk off” function. Two actions can enable the mic kill function. Any
time a Model 342 receives a Dante Identify command it can cause both an LED
pattern to start as well as enabling the mic kill function. The second
“trigger” method uses the Studio Technologies’ Global Mic Kill command. This
command can be activated from a menu choice in the STcontroller software
application.
The reason for the Model 342 to offer a mic kill function is simple. It’s
common in intercom applications for users to enable (“latch on”) a talk
channel and then go “off headset,” forgetting that they’ve left one or more
talk channel enabled. While they take a break or go to lunch, all other users
are forced to listen to that channel which may include
unwanted audio. This makes having the ability to disable talk channels very
useful. The Dante Identify command allows a “latched on” talk channel on a
specific Model 342 to be remotely disabled. Alternately, by using the Global
Mic Kill command a large group of units can simultaneously have their talk
channels disabled. This would include any Studio Technologies’ compatible
device that follows this protocol.
Technical Notes
IP Address Assignment
By default, the Model 342’s Ethernet interface 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 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 interconnected using
an RJ45 patch cord should, 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 use Ultimo integrated circuits to implement Dante. The Model 342
uses the UltimoX2 “chip” and, as such, a direct one-to-one interconnection
with another Ultimo-based product is not supported. An Ethernet switch that
links Ultimo-based units is required to successfully interconnect them. The
technical reason that a switch is required relates to the need for a slight
latency (delay) in the data flow and utilizing an Ethernet switch in the
application deployment will provide this.
Using the Dante Controller software application, the Model 342’s IP address
and related network parameters can be set for a fixed (static) configuration.
While this is a moreinvolved process than simply letting DHCP or link-local
“do their thing,” if fixed addressing is necessary then this capability is
available. In this case, it’s highly recommended that every unit be physically
marked, e.g., directly using a permanent marker or “console tape,” with its
specific static IP address. If knowledge of a Model 342’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
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INTERCOM STATION
information. For example, in Windows operating systems the arp a command can
be used to display a list of LAN information that includes MAC addresses and
corresponding IP addresses. The simplest means of identifying an unknown IP
address is to create a “mini” LAN with a small PoE-enabled Ethernet switch
connecting a personal computer to the Model 342. Then by using the appropriate
ARP command the required “clues” can be obtained.
Optimizing Network Performance
For best Dante audio-over-Ethernet performance a network that supports VoIP
QoS capability is recommended. In applications that utilize multicast Ethernet
traffic, enabling IGMP snooping can be valuable (as long as PTP v1 is also
supported). This protocol can be implemented on virtually all contemporary
managed Ethernet switches. There are even specialized switches that are
optimized for entertainment-associated applications. Refer to the Audinate
website (audinate.com) for details on optimizing networks for Dante
applications.
Application Firmware Version Display
A selection in the STcontroller software application allows the Model 342’s
application firmware version to be identified. This can be useful when working
with factory personnel on application support and troubleshooting. To identify
the firmware version, begin by connecting the Model 342 unit to the local area
network (via Ethernet with PoE) and wait until the unit starts to function.
Then, using STcontroller, review the list of identified devices and select the
specific Model 342 for which you want to determine its application firmware
version. Then within STcontroller select Version and Information under the
Device tab. A page will display that will provide lots of useful information.
This includes the application firmware version as well as details on the Dante
interface firmware.
Application Firmware Update Procedure
It’s possible that updated versions of the application firmware (embedded
software) that is utilized by the Model 342’s processor (microcontroller or
MCU) integrated circuit will be released to add features or to correct issues.
Refer to the Studio Technologies’ website for the latest application firmware
file. The unit has the ability to load a revised file into its MCU’s non-
volatile flash memory by way of a USB interface. The Model 342 implements a
USB host function that directly supports connection of a USB flash drive. The
Model 342’s MCU updates its application firmware using a file named
M342vXrXX.stm where the Xs are decimal digits that represent the version
number.
The update process begins by preparing a USB flash drive. The flash drive
doesn’t have to be empty (blank) but must be in the personal-computer-standard
FAT32 format. The USB interface in the Model 342 is compatible with USB 2.0-,
USB 3.0-, and USB 3.1-compliant flash drives. Save the new application
firmware file in the root directory of the flash drive with a name of
M342vXrXX.stm where XrXX is the actual version number. Studio Technologies
will supply the application firmware file inside a .zip archive file. The name
of the zip file will reflect the application file’s version number and will
contain two files. One file will be the actual application file and the other
a readme (.txt) text file. It’s recommended that the readme (.txt) file be
reviewed as it will contain details about the associated application firmware.
The application firmware file inside of the zip file will adhere to the
required naming convention. For example, a zip file named M342v1r00MCU.zip
would indicate that version 1.00 of the application firmware (M342v1r00.stm)
is contained within it.
A USB Type A receptacle and associated LED are located on the main circuit
board. The unit’s cover must be removed to access the USB connector. Once a
USB flash drive is correctly prepared, insert it into the USB receptacle. Then
the unit must be powered off and again powered on. At this point, the file
will automatically be loaded into the processor’s flash memory. The precise
steps required will be highlighted in the following paragraphs.
To install the application firmware file, follow these steps:
1. Disconnect power from the Model 342. This will entail removing the
Ethernet connection that is providing PoE power.
2. Remove the cover from the Model 342. Begin by using a Philips-head screw
driver with a #1 tip to remove six machine screws, two on the top edge of the
back panel, one on each side, and two on the front edge of the bottom surface.
Be certain to save the screws so that re-assembly will be fast and painless.
Then carefully slide the cover forward, rotating it forward 180 degrees once
it has cleared away from the two rotary level controls. Be very careful not to
kink or damage the small ribbon interconnecting cable.
3. Locate the USB connector on the main circuit board. It’s near the front,
between the two level controls. Insert the prepared USB flash drive into the
USB connector.
4. Apply power to the Model 342 by connecting to a Power-over-Ethernet (PoE)
Ethernet source.
5. After a few seconds, the Model 342 will run a “boot loader” program that
will automatically load the new application firmware file (M342vXrXX.stm).
This will take only a few seconds. During this time period the
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INTERCOM STATION
green LED adjacent to the USB receptacle will flash slowly. Once the entire
process is over, taking approximately 10 seconds, the Model 342 will restart
using the newly loaded application firmware.
6. At this time, the Model 342 is functioning with the newly loaded
application firmware and the USB flash drive can be removed. To be
conservative, remove PoE power first and then remove the USB flash drive.
7. Using the STcontroller software application, confirm that the desired
Model 342 application firmware version has been correctly loaded and saved.
8. Once the update process has been completed reverse the steps and reattach
the cover using the six machine screws.
Note that upon power being applied to the Model 342, if the connected USB
flash drive doesn’t have the correct file (M342vXrXX.stm) in its root folder
no harm will occur. If the correct file is not present upon power up the USB
LED will flash rapidly for a few seconds to indicate this error condition
after which normal operation using the unit’s existing application firmware
will begin.
Ultimo Firmware Update
As previously discussed, the Model 342 implements its Dante connectivity using
the UltimoX2 integrated circuit from Audinate. The Dante Controller software
application can be used to determine the version of the firmware (embedded
software) that resides in this integrated circuit. This firmware can be
updated by way of the Model 342’s Ethernet port. Performing the update process
is easily accomplished using an automated method called Dante Updater that’s
included as part of the Dante Controller application. This application is
available, free of charge, from the Audinate website (audinate.com). The
latest Model 342 firmware file, with a name in the form of M342vXrXrX.dnt,
will be available on the Studio Technologies’ website as well as being part of
Audinate’s product library database. (Note that XrXrX will be the actual
version number.) By Studio Technologies’ including the latest file in
Audinate’s database it allows the Dante Updater software application to
automatically query both the Model 342’s Dante interface and the database. If
a newer file is found in the database the Model 342’s Dante interface can then
be easily updated.
Restoring Factory Defaults
A command in the STcontroller software application allows the Model 342’s
configuration to be reset to the factory default values. From STcontroller
select the Model 342 for which you want to restore its defaults. Select the
Device tab and then select the Factory Defaults feature. Then click on the OK
box. Refer to Appendix A for a list of the Model 342’s factory default values.
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INTERCOM STATION
Specifications
Power Source: Power-over-Ethernet (PoE): class 1 (very low power, 3.84 watts)
per IEEE® 802.3af
Network Audio Technology: Type: Dante audio-over-Ethernet AES67-2013 Support:
yes, selectable on/off Dante Domain Manager (DDM) Support: yes
Bit Depth: up to 24
Sample Rate: 48 kHz Pull-Up//Down Support: no
Dante Transmitter (Output) Channels: 2
Dante Receiver (Input) Channels: 2
Dante Audio Flows: 4; 2 transmitter, 2 receiver
Network Interface: Type: 100BASE-TX, Fast Ethernet per IEEE 802.3u (10BASE-T
and 1000BASE-T (GigE) not support) Data Rate: 100 Mb/s (10 Mb/s and 1000 Mb/s
GigE Ethernet not supported)
Compatibility Headset A: single- or dual-ear broadcast-style with dynamic or
electret (low-voltage DCpowered) microphone: pin 1 mic common; pin 2 mic; pin
3 phones common; pin 4 phones left; pin 5 phones right
Compatibility Headset B: CTIATM/AHJ configuration (typically uses electret
powered mic): tip phones left; ring 1 phones right; ring 2 common; sleeve mic
Audio Channels: 1 talk, 2 listen
Microphone Input: Compatibility: dynamic or electret (low-voltage DC-powered)
microphones
Type: unbalanced
Electret Microphone Power: 3.3 volts DC via 2.00 k resistor, selectable on/off
Impedance: 1 k ohms, nominal, microphone power off; 690 ohms, nominal,
microphone power on Gain: 24, 30, 36, 42, or 48 dB, selectable, ref. 60 dBu
input to Dante output (20 dBFS nominal) Frequency Response: 40 Hz to 20 kHz,
3 dB Distortion (THD+N): <0.02% (at minimum gain)
Dynamic Range: 91 dB of dynamic range
Compressor: Application: applies to Dante transmitter (output) channel and
sidetone audio
Threshold: 1 dB above nominal level (19 dBFS) Slope: 2:1
Status LED: lights when compressor active
Issue Preliminary 1, April 2022 Page 18
Headphone Output: Type: 2-channel Compatibility: intended for connection to
stereo (dual-channel) or monaural (single-channel) headsets with nominal
impedance of 50 ohms or greater Maximum Output Voltage: 2.8 Vrms, 1 kHz, 150
ohm load Frequency Response: 20 Hz to 10 kHz, 3 dB Distortion (THD+N):
<0.002% Dynamic Range: >100 dB Call Receive Function: Implementation: monitors
both Dante receiver (input) channels for presence of call signals Signaling
Method: 20 kHz, ±800 Hz, within audio channels Call Receive Level: 27 dBFS
minimum Connectors: Headset A: 5-pin female XLR Headset B: 4-conductor (TRRS)
3.5 mm jack, per Japanese standard JEITA/EIAJ RC-5325A Ethernet: Neutrik
NE8FBH etherCON RJ45 jack USB: type A receptacle (located in side Model 342’s
enclosure and used only for application firmware updates) Configuration: uses
Studio Technologies’ STcontroller personal computer application Environmental:
Operating Temperature: 0 to 50 degrees C (32 to 122 degrees F) Storage
Temperature: 40 to 70 degrees C (40 to 158 degrees F) Humidity: 0 to 95%,
non-condensing Altitude: not characterized Dimensions (Overall): 4.3 inches
wide (10.9 cm) 2.1 inches high (5.4 cm) 5.1 inches deep (13.0 cm) Weight: 1.1
pounds (0.50 kg) Deployment: intended for tabletop applications
Specifications and information contained in this User Guide subject to change
without notice.
Model 342 User Guide Studio Technologies, Inc.
Model 342
INTERCOM STATION
Appendix A: STcontroller Default Configuration Values
Microphone Input Electret Power: Off (select box not checked) Microphone
Input Gain: 36 dB Button Operation Channel 1: Push to Talk/Tap to Latch
Button Operation Channel 2: Push to Talk/Tap to Latch Button Operation LED
Action: Red when Off/Green when On Button Operation LED Intensity: High
Headphone Output Channel 1 Input Routes to: Left Headphone Output Channel
2 Input Routes to: Right Sidetone Level: Medium System Mic Kill: Global
Kill Command System Call Indication: Flash
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Issue Preliminary 1, April 2022 Page 19
References
- Audinate - Pioneering the future of AV
- Совет Министров Республики Беларусь
- Home - Studio Technologies, Inc.