TB224

TALKBACK SYSTEM QUAD

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4 bidirectional talkback systems
Speaker monitor
RX signal indicator
Variable monitor
Monitor DIM level
Output for external monitors
19 inches 1U size

TB224 is 4 bidirectional route talkback systems.
It can do talkback for destination individually and it chooses each return and can monitor it with a built-in speaker.

“TX”
It operates the talkback with a paddle locker switch.
It makes Hold when it raises a lever, and it is with a PTT working when it lowers it.
The microphone amplifier of the compressor built-in allows the communication that the clarity is high.
TALK lamp turns on in the TB, and DIM works to a monitor speaker.
It is possible for a variable to level TB with a knob of the speaker side.
In addition, with internal switch setting, it can supply TB microphone with the phantom power supply of +15V, too.
(at the time of the shipment ON)

“RX”
1-4 sources mix the channel which it chose and can monitor it with a speaker.
When it is chosen, the dual color LED of the selecting switch turns on with green and turns on with red when it detects an input signal.
It is in this way superior in visibility because it emits light in orange when it detects a signal during choice.
In addition, it can set each source level individually.

“External monitor”
The signal of the ‘EXT SPEAKER’ port is the same as that of built-in speaker and can connect an external speaker to this port.

“GPI”
The relay contact which is closed when one of 4 TALK switches is ON to a GPI port is output and can use this function for control of the external equipment.

“TB microphone”
It can supply the phantom power of +15V for condenser microphones to XLR of the front panel.
(factory ON)
In addition, the goose neck microphone that it is optional, and the operability is good can conjugate.
(approximately 300mm)
The optional goose neck microphone (approximately 300mm) also available.

■ Specifications
•PGM INPUTS 1-4: balanced 47kΩ, Dsub15-F (#4-40)
•TX 1-4: balanced 50Ω, Dsub15-M (#4-40)
•RX 1-4: balanced 47kΩ, Dsub15-F (#4-40)
•MON OUT 1-4: balanced 50Ω, Dsub15-M (#4-40)
•REFERENCE LEVEL: +4dBu, max=+24dBu
•FREQ.RESPONSE: 20 to 20kHz ±0.5dB
•THD: <0.01% at 1kHz ref.level
•GPI: TALK contact max=100mA, Dsub9-F (#4-40)
•EXT SPEAKER: balanced 50Ω, Dsub9-M (#4-40)
•DIMENSIONS: 482Wx44Hx303D 4kg

 TB224 “PGM IN 1-4″ D15-F(#4-40) Connector
 1 PGM INPUT 1 +          9 PGM INPUT 1 -
 2 PGM INPUT 1 GND       10 PGM INPUT 2 +
 3 PGM INPUT 2 –         11 PGM INPUT 2 GND
 4 PGM INPUT 3 +         12 PGM INPUT 3 -
 5 PGM INPUT 3 GND       13 GM INPUT 4 +
 6 PGM INPUT 4 –         14 PGM INPUT 4 GND
 7                       15
 8

 TB224 "TX 1-4" D15-M(#4-40) Connector
 1 TX 1 +                 9 TX 1 -
 2 TX 1 GND              10 TX 2 +
 3 TX 2 -                11 TX 2 GND
 4 TX 3 +                12 TX 3 -
 5 TX 3 GND              13 X 4 +
 6 TX 4 -                14 TX 4 GND
 7                       15
 8

 TB224 "RX 1-4" D15-F(#4-40) Connector
 1 RX 1 +                 9 RX 1 -
 2 RX 1 GND              10 RX 2 +
 3 RX 2 -                11 RX 2 GND
 4 RX 3 +                12 RX 3 -
 5 RX 3 GND              13 X 4 +
 6 RX 4 -                14 RX 4 GND
 7                       15
 8

 TB224 "MONITOR OUT 1-4" D15-M(#4-40) Connector
 1 MONITOR OUTPUT 1 +     9 MONITOR OUTPUT 1 -
 2 MONITOR OUTPUT 1 GND  10 MONITOR OUTPUT 2 +
 3 MONITOR OUTPUT 2 -    11 MONITOR OUTPUT 2 GND
 4 MONITOR OUTPUT 3 +    12 MONITOR OUTPUT 3 -
 5 MONITOR OUTPUT 3 GND  13 MONITOR OUTPUT 4 +
 6 MONITOR OUTPUT 4 -    14 MONITOR OUTPUT 4 GND
 7                       15
 8

 TB224 "GPI" D9-F(#4-40) Connector
 1 TALK RELAY CONTACT a   6 TALK RELAY CONTACT b
 2                        7
 3                        8
 4                        9
 5

 TB224 "EXT SPEAKER" D9-M(#4-40) Connector
 1 EXT MONITOR SP +       6 EXT MONITOR SP -
 2 EXT MONITOR SP GND     7
 3                        8
 4                        9
 5

• Order Information

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