Model 348 Intercom Station

Order Code: M348

The Model 348 Intercom Station offers eight talk-and-listen audio channels that can be configured for intercom, talent cueing (IFB), and REMI/At-Home applications. Utilizing Dante® audio-over-Ethernet network technology, the desktop unit offers extensive resources in a compact table-top enclosure. It is ideal for traditional sports and news broadcasting, live event, corporate AV, theater, and eSports applications.

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Over a standard IP network, multiple Model 348 units can be used in party-line (PL) intercom applications with help from an external Dante-enabled audio matrix such as the Studio Technologies Model 5422 Dante Intercom Audio Engine. Units can also be used "point-to-point" or interfaced with Dante-compatible matrix intercom systems. The unit includes two Neutrik etherCON RJ45 connectors for redundant network connections. The primary network connection can provide power to the unit using standard Power-over-Ethernet (PoE) network switches. It can also be DC powered using a 10-18 volt source that is connected with a broadcast-standard 4-pin XLR connector. If both the PoE and DC power sources are connected the unit will be powered by the PoE supply only.

The Model 348 can be used with intercom-style and personal-computer gaming headsets with dynamic or electret microphones through the 5-pin female XLR headset connector or with a dynamic gooseneck-style microphone through the 1/4" gooseneck connector. A low-noise microphone preamplifier and associated voltage-controlled-amplifier (VCA) dynamics controller (compressor) ensures that mic input audio quality is preserved while minimizing the chance of signal overload. The user can monitor the Dante audio inputs on either the headset output or the built-in, high-quality speaker. A modern class-D speaker amplifier IC is used for maximum fidelity.

The front panel includes eight RGB illuminated rotary controls which are used to control the level of the Dante signal sources. Two more rotary controls are used to mute/un-mute and control the output level to the headset and speaker. Each illuminated control can show if signal is present on the associated audio channel or if the channel is muted. Eight illuminated pushbutton switches allow the user control of the eight Dante outputs as well as show the presence of a 20 kHz call signal.

All Model 348 operating parameters are configured using the STcontroller software application. Compatible with the Windows® operating system, the easy-to-use program allows a unit to be configured in just minutes. General features include adjustment of the microphone preamplifier gain, sidetone audio level and activity, and LED intensity. The real power of the Model 348 is in its ability to be configured for a combination of intercom (talk/listen), talent cueing (program audio w/interrupt audio), REMI/At-Home (talk w/tone signaling), or general audio monitoring applications. Each of the eight channels can be independently configured, allowing support for contemporary applications where needs are never "standard."

When the Model 348 is combined with other Dante-supporting products from Studio Technologies, a wide range of intercom, talent cueing, and audio monitoring applications can be supported. These devices include intercom and listen-only user beltpacks, announcer's consoles, and Dante-to-analog party-line (PL) interfaces. And by utilizing the Model 5422 Dante Intercom Audio Engine it's a simple matter to create customized PL and private point-to-point intercom circuits or talent cue (IFB) channels. In all cases users can expect the audio quality will be excellent and features simple to operate.

The Model 348's main application firmware can be udpated using the USB port on the back of the unit; the Dante firmware can be updated via Ethernet.

 

Applications: Dante-based intercom, IFB (interrupted foldback) master station, audio monitor mixer, specialized tone generator

Overall Number of Channels: 8

Power Sources:
Power-over-Ethernet (PoE): class 0 (classification unimplemented, ≤12.94 watts) per IEEE® 802.3af
External: 10 to 18 volts DC, 0.65 A maximum at 10 volts DC (can be powered by optional PS-DC-02)

Network Audio Technology:
Type: Dante audio-over-Ethernet
AES67-2013 Support: yes, selectable on/off
Dante Domain Manager (DDM) Support: yes
Ethernet Interface Configuration: Switched or Redundant
Bit Depth: up to 24
Sample Rate: 48 kHz
Dante Receiver (Input) Channels: 16
Dante Transmitter (Output) Channels: 11
Dante Audio Flows: 32; 16 transmitter, 16 receiver
Internal Digital Audio Processing: 32-bit, fixed
Input-to-Output Audio Processing Latency: <200 uSec
Nominal Input and Output Level: –20 dBFS

Network Interfaces: 2, Primary-PoE and Secondary
Type: 1000BASE-T (Gigabit Ethernet ("GigE")) per IEEE 802.3ab (10 and 100 Mb/s not supported)
Power-over-Ethernet (PoE): per IEEE 802.3af (applicable to Primary-PoE network only)

Microphone Input – Headset:
Compatibility – Headset A: single- or dual-ear broadcast-style with dynamic or electret (low-voltage DC-powered) microphone: pin 1 mic common; pin 2 mic; pin 3 phones common; pin 4 phones left; pin 5 phones right
Compatibility – Headset B: CTIA™/AHJ configuration (typically uses electret powered mic): tip phones left; ring 1 phones right; ring 2 common; sleeve mic
Type: unbalanced
Impedance: 1 k ohms, nominal, microphone power off; 690 ohms, nominal, microphone power on
Gain: 26, 32, 38, 44, 50 dB, selectable
Frequency Response: –4 dB at 30 Hz, –2.6 dB at 40 Hz, –1.8 dB at 50 Hz, –2.4 dB at 10 kHz, –3.8 dB at 20 kHz
Distortion (THD+N): <0.09%, measured at –20 dBFS, 22 Hz to 22 kHz bandwidth, 38 dB of gain
Dynamic Range: >93 dB, A-weighted, 26 dB gain

Microphone Input – Gooseneck:
Microphone Power: 5 volts DC via 4.99 k resistor
Impedance: 3.3 k ohms, nominal
Gain: 12, 18, 24, 30, 36 dB, selectable
Frequency Response: –3.0 dB at 40 Hz, –2.0 dB at 50 Hz, –2.0 dB at 16 kHz, –3.0 dB at 20 kHz
Distortion (THD+N): <0.04%, measured at –20 dBFS, 22 Hz to 22 kHz bandwidth, 36 dB of gain
Dynamic Range: >97 dB, A-weighted, 12 dB gain

Compressor:
Application: applies to headset and gooseneck microphone audio
Threshold: 1 dB above nominal Dante output level (–19 dBFS)
Slope: 2:1
Status LED: compressor active

Headset Headphone Output:
Type: 2-channel (stereo)
Compatibility: intended for connection to stereo (dual-channel) or monaural (single-channel) headsets with a nominal impedance of 50 ohms or greater
Maximum Output Voltage: 3.0 Vrms, 1 kHz, 150 ohm load
Frequency Response: 20 Hz to 20 kHz, +0/–1 dB
Distortion (THD+N): <0.02%
Dynamic Range: >93 dB

Speaker Monitor Output:
Type: single-channel (monaural)
Speaker: 1.3-inch (32 mm) diameter
Maximum Power: 4 watts RMS, nominal
Frequency Response: 150 Hz to 20 kHz, ±3 dB

18 kHz and 20 kHz Tone Outputs:
Type: sine wave
Level: –20 dBFS
Frequency Accuracy: <10 ppm
Distortion: <0.0001%

Call Function:
Receive Frequency: 20 kHz, ±800 Hz, within audio channel
Receive Level: –27 dBFS minimum
Send Frequency: 20 kHz
Send Level: –20 dBFS
Audible Alert: 3-burst sequence, 524 Hz, sine wave, selectable level range

Connectors:
Headset A: 5-pin female XLR
Headset B: 3.5 mm 4-conductor TRRS jack, per Japanese standard JEITA/EIAJ RC-5325A
Gooseneck Microphone: ¼-inch 3-conductor with 7/16-20 UNF threaded bushing
Ethernet: Neutrik NE8FBH etherCON RJ45 receptacles
External DC: 4-pin male XLR (pin 1 negative, pin 4 positive)
USB: type A receptacle (used only for updating firmware)

Configuration: requires Studio Technologies' STcontroller software application, version 2.04.00 and later

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):
6.5 inches wide (16.5 cm)
2.9 inches high (7.4 cm)
4.9 inches deep (12.5 cm)

Deployment: intended for tabletop applications

Weight: 2.1 pounds (0.95 kg)

Specifications and information contained in this User Guide subject to change without notice.

Documentation

Data Sheet / Brochure  

Title
Model 348 Intercom Station Data Sheet
Description
Issue Preliminary 2
Release Date
01-Aug-2018

User Guide  

Title
Model 348 Intercom Station User Guide
Description
Issue Preliminary 2
S/N Range
00151-later
Firmware
1.05-later
Release Date
01-Nov-2019

Other Documentation  

Title
Example Using Dante Technology to Provide Party-Line (PL) and Listen-Only (IFB) Capability
Description
Issue 3
Release Date
21-Feb-2019
Title
Example of REMI Event Utilizing Dante Technology and Audio Tie-Lines via Internet for On-Air, IFB, and Support Communications
Description
Issue 2
Release Date
21-Feb-2019

Images  

Model 348 Intercom Station Front and Rear Views
Model 348 Intercom Station Front Angle View
Model 348 Intercom Station Front View
Model 348 Intercom Station Rear View
Model 348 Intercom Station shown with gooseneck-style microphone and headset
Model 348 Intercom Station shown with gooseneck-style microphone
Example Using Dante Technology to Provide Party-Line (PL) and Listen-Only (IFB) Capability
Example of REMI Event Utilizing Dante Technology and Audio Tie-Lines via Internet for On-Air, IFB, and Support Communications
Dante Controller Software Application Routing Screen

Downloads  

Notes:

  1. The latest firmware for Dante-supported products is available below. For details on how to load firmware refer to the User Guide associated for each specific product. To obtain the Dante Firmware Update Manager, click here.
  2. STcontroller is a personal computer application that offers a quick and easy means of confirming and revising selected parameters associated with several of the Studio Technologies Dante-compatible products. To obtain the STcontroller Application, click here.

Dante Firmware  

Description
Dante Firmware (.dnt) and Release Notes (.txt)
Notes
DDM Ready ✓; AES67 Support ✓
Version
2.0.0 (Broadway v4.2.1.8))
S/N Range
00151-later
Release Date
16-Sep-2019

Application / Main Firmware  

Description
Main Firmware (.bin) and Release Notes (.txt)
Version
1.04
S/N Range
00151-later
Release Date
01-Aug-2019
Description
Secondary Firmware (.bin) and Release Notes (.txt)
Version
1.02
S/N Range
00151-later
Release Date
15-Jul-2019

FPGA Firmware  

Description
FPGA Firmware (.bit) and Release Notes (.txt)
Version
0.90
S/N Range
00151-later
Release Date
17-May-2019
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