Bogen TBA-15 User manual

Talkback
Amplifier
Model TBA15
•15-watt amplifier
• Hands-free 2-way conversations through the
paging system
• 600-ohm transformer-coupled telephone line
input
• 25V or 70V balanced line outputs
• Adjustable sensitivity control for switching from
listen to talk
• Adjustable switch-back delay prevents
chopping of pages and provides smooth 2-way
conversations
• Talkback and page volume controls
• Talkback frequency shaped for maximum
intelligibility and background noise rejection
• Power ON LED
• Mute input forces amplifier to go into page mode
• Control of speech direction is maintained at the
telephone handset
• Electronic switching, no relays
• Resettable circuit breaker with thermal
protection
• Operates from a 120V AC, 60 Hz source
• Finished in black enamel
• Wall or 19" rack mount
• FCC Part 68 approved
Specifications subject to change without notice.
© 2003 Bogen Communications, Inc.
Part No. 54-7801-02B Printed in U.S.A. 0312
The TBA15 amplifier allows a paging system to be used for hands-free, two-way conversation between a
telephone system and remote speakers.The TBA15 uses the system’s speakers as microphones and feeds this
signal out to a telephone line.When the TBA15 senses an audio signal on the telephone line, it automatical-
ly switches its 15W amplifier on and uses the speakers in the system conventionally. Control of speech
direction is maintained at the telephone handset.
Features
Description

FCC Registration Number,
under Part 68 rules: CD272Q-17147-KX-N
Ringer Equivalence: 0.0B
Controls (screwdriver-adjustable): Loudspeaker Output Volume,Talkback Volume, Switching Sensitivity,
Switching Delay
Telephone to Loudspeaker
Rated Power Output: 15W
Frequency Response: 200 Hz to 10 kHz
Input Sensitivity: -20 dBm
Input Impedance: 600 ohms, balanced
Distortion (@RPO): Less than 3% (150 mV input signal)
Signal-to-Noise Ratio: -50dB (20 Hz to 20 kHz)
Voice-Activated Switching: Sensitivity -46dBm; Attack Time – Less than 5ms. (3ms., typ.);
Switching Delay Time – adjustable from 50 ms. to greater than 0.5 sec.
Output Impedance: 25V or 70V balanced line
Loudspeaker to Telephone
Frequency Response: 1500 Hz to 20 kHz
Distortion: Less than 2%
Signal-to-Noise Ratio: -40 dB
Output Level: Processed to meet FCC Part 68
Circuit Overload Protection: Push-to-Reset circuit breaker, Safe Operating Area (SOA) and thermal
protection for the output device
Unidirectional Operation: Terminals provided to defeat two-way function
Power Requirements: 120V AC, 60 Hz, 0.7A
Temperature Range: 0 - 50°C (32 - 122°F)
Humidity Range: 0 - 95%, noncondensing
Enclosure: Sheet metal finished in black enamel
Dimensions: 5-1/4" H x 19" W x 2-7/8" D
Weight: 7 lb.
50 Spring Street, Ramsey, NJ 07446, U.S.A.
Tel. [phone] FAX: [phone], www.bogen.com
The paging/talkback amplifier shall be a BogenTBA15,
approved under part 68 of FCC rules. The unit shall
provide two-way communication between a
telephone and remote loudspeakers. It shall provide
automatic electronic switching of the direction of
conversation, without the use of relays or other
moving parts.
The amplifier shall have a rated power output of 15
watts. The frequency response shall be shaped for
maximum intelligibility and background noise rejec-
tion. Distortion shall be less than 3% at rated power.
Attack time for the voice-activated circuit shall be
less than 5ms. (3ms., typ.). Switching delay time shall
be adjustable from less than 50ms. to greater than 0.5
sec. Screwdriver-adjustable controls shall be provided
to adjust switching sensitivity, switching delay, and
loudspeaker and handset volume levels.
Terminals shall be provided for connection of a 600-
ohm transformer-coupled telephone input line, and
25V/70V constant-voltage outputs. Mute terminals
shall be provided to defeat the talkback function.
Terminals shall be housed within a panel recess and
protected by a removable cover.
The amplifier shall operate from a 120V AC, 60 Hz
source. Circuit safeguards shall include a press-to-
reset AC circuit breaker, safe operating area (SOA)
and thermal protection. A power lamp shall be pro-
vided on the front panel.
The amplifier enclosure shall be constructed of sheet
metal and finished in black enamel. Overall dimen-
sions shall be 5-1/4" H x 19" W x 2-7/8" D. Keyhole
slots and machine-screw holes shall be provided for
wall- or rack-mounted installation.
Architect and
Engineer
Specifications*
Technical
Specifications
* Architect and Engineer Specifications are available on CD and
online in a Word document to assist you with preparing your bids.