TBP8 - talkback plus 8 channels
2/4 wires intercom - 4 interrupted feedback

TBP8 is the new professional intercom produced by ELMAN that allows the communication to 4 wires on 8 channels, or to 4 wires on 7 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:

• different configuration (from the standard 7+1) for the 4 and 2 wires channels (for example: 4 channels to 4 wires and 4 channels to 2 wires).
• XLR outputs with superimposed 12 volts (current limited) to be able supply energy to beltpacks not selfpowered.

The functions IFB of every channel are separately configurable.
The connection with other apparatuses happens through common connectors XLR.
The TBP8 is an intercom usable in all that cases in which the distance communication is necessary, for example:

• production of television programs and  films;
• theatrical shows;
• conferences;
• sporting events;
• commercial and industrial installations, etc.

Thanks to the use of particular XLR panel connectors, it has been possible to contain the dimensions of the TBP8 in a container only 1RU 19" tall.
This, togheter  with low consumption and the possibility of 12 V or 24 V power supply, make the TBP8 a versatile instrument for use both in studios and in vehicles for outside broadcast.

TBP8 is compatible with similar apparatuses of other brands in commerce.

FEATURES

• 8 independent channels.
• 4 IFB bus and loop-through for every channel.
• Monitoring of IFB and RTC signal (talkback return).
• 2 wires mode selectable for channel 1, with or without IFB.
• Selectable microphone input: headset or gooseneck (XLR 3 connector).
• Independent regulation for the microphone inputs with relative level indication.
• External control LS CUT (cut listening loudspeaker) and DIM (attenuation listening).
• Independent configuration for every channel for: routing control and signal monitoring.
• Talk switch GPI output (optional)
• Amplified output (2 watts) for external speakers through two 6.3 mm jacks (one on front panel and other on rear panel)
• Universal AC power: 100-240 Vac 70 mA
• DC power: 12 V or 24 V (1,2 A).
• Metallic case: 19" 1RU standard  with depth 350 mm.
• Weight: 3.5 Kg.

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

• Select Mic - Select microphone input
• LS CUT - cut of loudspeaker listening
• LS DIM - regulation of listening level
• GROUP TALK - talk to all 8 channels
• TALK - TALK button for each of the 8 channels,  configurable as monostable or bistable
• MON LEVEL - Regulation of listening level for each of the 8 channels
• IFB / RTB switcher for each of the 8 channels

Rear panel

• Upper dip-switch (10 switches) for: selection operation to 2/4 wires for channel 1, Talk Latch (selection of the monostable or bistable function for the keys TALK), selection of 4 wires output with or without IFB
• Bottom dip-switch IFB/RTB (8 switchers) for: send to every exit TB, the signal IFB or RTB

Nella configurazione base è composto da due apparati:

• Engineering, in dotazione al tecnico e
• Producer, riservato al regista, connessi tramite cavo pin to pin tra i connettori LINK posti sui pannelli posteriori degli stessi.

Options: 

On request we can furnish a version of the TBP8 able to feed directly the beltpack terminals 4WBB through the audio cable.

TBP8T
Is available a modified version of TBP8 able to connect two telephones in parallel to the input 1. The only differences in comparison to the TBP8 basic version concern:

• the call button of the user 1 (with writing RING/TALK) that is used to make ring and to converse with the connected operators (for example the speakers of a newscast)

• on the back panel, change the connectors relative of the user 1 (2 XLR female instead that a male and a female) and the writings that in this case are TEL1 and TEL2 .

Optional accessories

TBU - Telephone Balance Unit 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

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

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.