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Studio Technologies Model 45DR Dante to Partyline Interface

Model: M45DR

Studio Technologies Model 45DR Dante to Partyline Interface
Studio Technologies Model 45DR Dante to Partyline Interface
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About: Studio Technologies Model 45DR Dante to Partyline Interface

The Model 45DR Dante to 2-Channel Party-Line Intercom Interface is designed for applications that utilize 2-channel analog party-line (PL) intercom technology. This type of intercom is commonly used in broadcast, corporate, and commercial applications where a simple, reliable, easy to use solution is desired. The RTS® TW-series of 2-channel intercom equipment is directly compatible with the Model 45DR. The Dante® audio-over-Ethernet media networking technology is used to transport the two send and two receive audio channels associated with the party-line circuit. Two hybrid circuits with automatic nulling provide excellent audio quality and high return-loss. (These hybrid circuits are sometimes referred to as 2-wire to 4-wire converters.) The Model 45DR is compatible with the latest broadcast and audio equipment that uses Dante technology. An Ethernet connection is all that's required to make the Model 45DR part of a sophisticated, networked audio system.

A Model 45DR can interconnect with devices such as matrix intercom systems, DSP processors, and audio consoles. The Model 45DR is directly compatible with the RTS ADAM® OMNEO® matrix intercom network. Alternately, two Model 45DR units can interconnect by way of the associated Ethernet network. The Model 45DR can be powered by Power-over-Ethernet (PoE) or an external source of 12 Vdc. A party-line power source and impedance termination networks can be supplied by the Model 45DR, allowing connection of user beltpacks such as the popular RTS BP-325. A Model 45DR can also connect with an existing powered and terminated intercom circuit. Audio level meters provide confirmation of system performance during setup and operation. Support for transporting call light signals between Model 45DR units is also provided.

Standard connectors are used for party-line intercom, Ethernet, and DC power interconnections. The Model 45DR's enclosure has a "1/2-rack" 1U form factor and weighs less than two pounds, making it well suited for use in portable applications. Alternately, using one of the optional rack-mount front panels, one or two Model 45DR units can be mounted in a single space (1U) of a standard 19-inch rack enclosure.

Key Features

  • Dante audio-over-Ethernet technology
  • Integrated party-line intercom power source
  • Analog hybrids with auto null capability
  • Input and output level metering
  • Excellent audio quality
  • PoE and 12 Vdc powering
  • Standard connectors
  • Table-top, portable, or optional rack-mount use

Specifications:

Power Sources:
Power-over-Ethernet (PoE): class 3 (medium power) per IEEE 802.3af
External: 10 to 18 Vdc, 1.0 A max @ 12 Vdc

Network Audio Technology:
Type: Dante audio-over-Ethernet
AES67-2013 Support: yes
Dante Domain Manager (DDM) Support: yes
Bit Depth: up to 24
Sample Rate: 48 kHz
Number of Transmitter (Output) Channels: 2
Number of Receiver (Input) Channels: 2
Dante Audio Flows: 4; 2 transmitter, 2 receiver
Analog to Digital Equivalence: a +4 dBu input with 0 dB gain selected results in a Dante digital output level of –20 dBFS

Network Interface:
Type: twisted-pair Ethernet, Power-over-Ethernet (PoE) supported
Data Rate: 100 Mb/s (10 Mb/s Ethernet not supported)

General Audio:
Frequency Response (PL to Dante): –0.3 dB @ 100 Hz (–4.8 dB @ 20 Hz), –2 dB @ 8 kHz (–2.6 dB @ 10 kHz)
Frequency Response (Dante to PL): –3.3 dB @ 100 Hz (–19 dB @ 20 Hz), –3.9 dB @ 8 kHz (–5.8 dB @ 10 kHz)
Distortion (THD+N): <0.15%, measured at 1 kHz, Dante input to PL interface pin 2 (0.01% pin 3)
Signal-to-Noise Ratio: >65 dB, A-weighted, measured at 1 kHz, Dante input to PL interface pin 2 (73 dB, PL interface pin 3)

Party-Line (PL) Intercom Interface:
Type: 2-channel analog PL, unbalanced (pin 1 common; pin 2 DC with channel 1 audio; pin 3 channel 2 audio)
Compatibility: 2-channel PL intercom systems such as those offered by RTS®
Power Source: 29 Vdc, 240 mA maximum
Impedance – Local PL Power Not Enabled: >10 k ohms
Impedance – Local PL Power Enabled: 200 ohms
Analog Audio Level: –10 dBu, nominal, +3 dBu maximum, PL interface pin 2 (+7 dBu, PL interface pin 3)
Call Light Signal Support: 20 kHz, ±1%
Mic Kill Signal Support: 24 kHz, ±1%

Party-Line (PL) Hybrids: 2
Topology: 3-section analog circuitry compensates for resistive, inductive, and capacitive loads
Nulling Method: automatic upon user initiation, processor implements digital control of analog circuitry; settings stored in non-volatile memory
Nulling Line Impedance Range: 120 to 350 ohms
Nulling Cable Length Range: 0 to 3500 feet
Trans-Hybrid Loss: >50 dB, typical at 800 Hz, PL interface pin 2 (>55 dB, PL interface pin 3)

Meters: 4
Function: displays level of audio input and output channels
Type: 5-segment LED, modified VU ballistics

Connectors:
Party-Line (PL) Intercom: 3-pin male and female XLR
Ethernet: Neutrik etherCON RJ45
External DC: 4-pin male XLR
USB: type A receptacle

Dimensions (Overall):
8.7 inches wide (22.1 cm)
1.72 inches high (4.4 cm)
8.3 inches deep (21.1 cm)

Mounting Options: single-unit rack-mount front panel (M45DRRM-1), two-unit rack-mount front panel (M45DRRM-2), and combination Model 45DR/Model 43D rack-mount front panel (RMFP-01); uses one space (1U) in a standard 19-inch rack

Weight: 1.7 pounds (0.77 kg); rack-mount front panels add 0.2 pounds (0.09 kg)



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