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TBP12 - talkback plus 12 channels
2/4 wires intercom - 4 interrupted feedback

TBP12 - talkback plus 12 channels

TBP12 is the new professional intercom produced by ELMAN that allows the communication to 4 wires on 12 channels, or to 4 wires on 11 channels plus to 2 wires on 1 channel, on which you can connect more users.

To request to the moment of the order it is possible to ask for:

 

(click on photo to enlarge)

 

The functions IFB of every channel are separately configurable.
The connection with other apparatuses happens through common connectors XLR.
The TBP12 is an intercom usable in all that cases in which the distance communication is necessary, for example:

 

Thanks to the use of particular XLR panel connectors, it has been possible to contain the dimensions of the TBP12 in a container only 2RU 19" high.
This, togheter  with low consumption and the possibility of 12 V or 24 V power supply, make the TBP12 a versatile instrument for use both in studios and in vehicles for outside broadcast.

TBP12 is compatible with similar apparatuses of other brands in commerce.

 

FEATURES

Microphone inputs

Gooseneck microphone input
type: balanced and unbalanced
connector: XLR3 female
impedance: 2000/4000 ohm
phantom power: 12 V 1.7 mA

headset inputs
type: balanced and unbalanced
connector: XLR5 female
impedance: 2000/4000 ohm
phantom power: 12 V 1.7 mA

 

Microphone output
type: balanced output with galvanic isolation in continuous current
connector: XLR3 male
nominal output level: 0 dBu
maximum output level (clipping): 17 dBu

 

Talkback inputs (RTB IN)

type: balanced input with galvanic isolation in continuous current
connector: XLR3 female
impedance: 10K ohm
Input level for 2 W in loudspeaker: 0 dB
maximum level (clipping): 12 dB
bandwith: -3 dB from 100 Hz to 10 Khz

 

Talkback outputs (TB OUT)

type: balanced output with galvanic isolation in continuous current
connector: XLR3 male
nominal output level: 0 dBu
maximum output level (clipping): 17 dBu
bandwith: -3 dB from 100 Hz to 7.5 Khz

 

Interrupted Feedback inputs (IFB IN)

type: balanced input with galvanic isolation in continuous current
connector: XLR3 female
impedance: 10K ohm
Input nominal level for 2 W in loudspeaker: 0dB
maximum level (clipping): 12 dB
bandwith: -3 dB from 100 Hz to 10 Khz

 

Segnaling LEDS

Talk Level 0 dBU
Talk Level 8 dBU
Call and Talk for every channel
GN (Gooseneck): gooseneck microphone input selected
H/S (Headset): headset microphone input selected

Controls

Front panel

Rear panel

(click on photo to enlarge)

 

 

Options: 


On request we can furnish a version of the TBP12 able to feed directly the beltpack terminals 4WBB through the audio cable.

 

 

Optional accessories

TBP8 - talkback plus 8 channels

 

TBP8 - talkback plus 8 channels

TBU - Telephone Balance Unit

The TBU (Telephone Balance Unit) provide high degree of separation between send and receive signals, enabling 4-wires communications system to interface with the telephone network.
In telephone IFB applications, the high drive capacity at the 4-wires output, enables a presenter’s earpiece to be connected directly to the unit without an external amplifier.

Features

 

  • Isolated, full-duplex 4-wires interface to non-digital telephone direct exchange lines.
  • The unit is line powered.
  • Simple optimization of sidetone rejection.
  • LED’s indicate “ring” and “off hook” conditions.
  • Input level control.
  • High drive output with level control.
  • Loop-through telephone line sockets
  • Connection to the telephone set is maintained while the unit is in use

Description

This unit is powered from the telephone line and provides an interface to a 4-wires circuit with separate level control of send and receive signals.
Optimum rejection of the input signal on the 4-wires output is achieved by adjusting SIDETONE NULL trimmer.
This can be used to compensate for local line variations or to adapt to the telephone systems of other countries, where line characteristics may differ.

To enable communication between the 4-wires circuit and the telephone network, the 4-wires an line connections are made to the unit and the “hook” switch is pressed to power the unit from the line.
This will be indicated by the ON LED, and can either be done after an outgoing call has been dialed on a telephone set connected to the unit, or to answer an incoming call after RING LED is seen flash (a telephone set is not required for incoming calls unless an audible ring is required).
If the sidetone level at the 4-wires output is found to be excessive, the outgoing signal level should be reduced or the balance controls adjusted to minimize it.
To ensure compatibility with all systems, a switch is provided to select either the inner or outer pair of conductors on the RJ11 connector.

TBU is compatible with similar apparatuses of other brands in commerce.

Specifications


4-Wires input

  • Input impedance: 10K ohm, transformer coupled on XLR3F connector.
  • Input level range: -12dBU to +8dBU

4-Wires output

  • Output impedance: 150 ohm, transformer coupled on XLR3M connector.Output level range: -12dBU to +8dBU
  • Sidetone rejection: 30 to 40dB average, depending on line characteristics.

2-Wires

  • Connectors: 2xRJ11(American)
  • Adapter BT603A (British) external

Mechanicals

  • Dimensions: 120 mm x 78 mm x 43 mmCase: Aluminum Alloy, clear Anodized
  • Weight: 250g

TBP8 - talkback plus 8 channels 4WBB - 4 Wires Beltpack Box

The 4WBB is a compact 9V battery-powered box for headset use only.
Is available as option, a model of 4WBB directly fed by the TBP8 intercom through the cable audio. 
Selectable operating modes suit various applications in a number of studio and outside broadcast situations where 4-wires communications are used.

Features
  • Three user selectable modes:
    1) 4 wires mode
    2) Interrupted loop-trough mode with input monitoring
    3) 2-wires conference mode
  • 9 volt battery powered with low current drain (current 5mA)
  • Microphone limiter to maintain peak output at +6dB
  • Power for electret microphone (optional - set with internal jumper)
  • Auxiliary audio monitoring input on unbalanced 3.5mm jack
  • LED low voltage warning: at 6V
  • Strong aluminum case
Description

Direct compatibility with other communications equipment is provided by the use of 4-wires operation as opposed to the more common, 2-wires beltpack systems.
Greater flexibility resulting from 4-wires operation also enables both interrupt and 2-wires modes to be easily selected by user.
The IFB option is typically used to provide an interrupted program feed to a presenter’s earpiece, when the talk switch is pressed, while simultaneously allowing the program sound to be monitored on the headset.
As the signal is switched directly between the input and output connectors, the program signal path is fail-safe and does not require the unit to be powered.
In 2-wires mode, a number of Beltpack units can simply be connected in parallel, enabling all units to communicate with each other in conference mode.
To provide compatibility with earpieces which use a mono jack plug, the tip connection on the headset jack socket supplies the output for the headphones, the ring connection providing the microphone input.
The auxiliary input jack can be used in all modes to monitor any additional line-level signal such as a tape machine playback.

4WBB is compatible with similar apparatuses of other brands in commerce.

Specifications

Microphone input / Line output amplifier

  • Input impedance: Unbalanced for 200 ohm dynamic microphoneMicrophone connector: 6.35mm headset jack. Ring input, sleeve gndLimiter input threshold: -62dBULine output level: +8dBU peak (battery voltage >6V)Output impedance: 150 ohm, transformer coupled
  • Line connector: XLR3M

Line input / Headphone amplifier

  • Line input impedance: 10K ohm, transformer coupledLine input connector: XLR3FGain range: +10dB to offAuxiliary input impedance: unbalanced high impedanceAuxiliary input connector: 3.5mm jackGain: fixed at 0dBMax Line/Aux input level: +8 dbU
  • Headphone connector: 6.35mm headset jack. Tip output, sleeve GND

2-Wires mode

  •  Line impedance:10k ohm (listen), 600 ohms (talk)

Mechanicals

  • Dimensions: 120 mm x 78 mm x 43 mmCase: Aluminum Alloy, clear Anodized
  • Weight: 385g

TBP8 - talkback plus 8 channels

BIA - Beltpack IFB Amplifier

 

The BIA (Beltpack IFB Amplifier), battery-powered belt-pack unit, allows either loudspeaker or headphone monitoring of a communication or audio feed, and is typically used with a presenter’s earpiece as part of an IFB kit.

Standard Features

• Selectable limiter: prevents clipping distortion and damage to hearing with earpieces & headphone types
• Built-in 0.5W loudspeaker & amplifier (power to the amplifier is cut when headphones are connected)
• Loop-through male & female XLR connectors enable several units to be driven from a single feed.
• Headphone output on “A” gauge 6.35mm jack.
• Very low battery consumption.
• Low battery voltage indicator.

Description

The input gain is controlled by a potentiometer, a 0/20dB gain switch and a selectable limiter. The limiter can be used to ensure a safe listening level over a wide range of input signal levels and also improves signal intelligibility by preventing clipping of the output signal as the battery discharges.

The balanced output stage of the headphone amplifier drives earpieces and headphone, having either mono or stereo jack plugs, with connections to the tip and ring only .
Although this cause headphones to driven in anti-phase, intelligibility of speak is unaffected, and the higher impedances of the series connection ensures the most efficient impedance match to the output stage.

BIA is compatible with similar apparatuses of other brands in commerce.

Specifications

  • Input impedance: 200K ohm, active balancedInput connectors: XLR3 plug & socket
  • Input signal limiter threshold (Max Gain): Adjustable
Battery voltage: 6-9 V
Gain switch setting 0 dB 20 dB
Max input level +14 dBU -6 dBU

 

  • Max headphone O/P level (no limiter): +15dBU @ 9V, @ 6V (no load)Max headphone O/P level (with limiter): Threshold level +6dB (no load)Headphone output impedance: 280 ohmBattery voltage for constant limiter output: 9V to 6VMaximum Loudspeaker power: 0.5W with 9V batteryPower supply: 9V PP3 battery (500mAh typical)
  • Low battery indicator: threshold 6V

Mechanicals

  • Dimensions: 120 mm x 78 mm x 43 mmWeight: 250g
  • Case: Alluminium Alloy, clear Anodized

 

In accordance with constant improvement policy of products, El.Man (Elettronica Mangione) reserves the right to modify without notice and at any time, features and prices of its own apparatus.