AEV ITB 2O1 User manual

AEV ITB201 - dual telephone hibryd
AEV Broadcast srl - via della Tecnica 33, 40050 Argelato Bologna ITALY
www.aev.eu [e-mail]
1
AEV ITB 2O1
Dual Telephone Hybrid

AEV ITB201 - dual telephone hibryd
AEV Broadcast srl - via della Tecnica 33, 40050 Argelato Bologna ITALY
www.aev.eu [e-mail]
2
Guarantee
The equipment is warranted for a period of 2 years from the date of invoice (exworks).
The warranty does not cover faults provoked by carelessness, natural causes and parts subject
to wear. n addition, the cost of labour and shipment is not covered. The warranty will be
voided if the equipment is mishandled.
AEV Broadcast via della Tecnica,33 – 40050 ARGELATO (BO) TALY
Web site : www.aev.eu - email: [email protected]
Feedback
AEV welcomes your comments on our products. Your suggestions may be extremely useful to
develop new equipment and manuals and this will be of benefit to you too! Let us have your
comments on our products and we will be pleased to read them.
Send your information by e-mail to the following address::i[email protected]
Technical Support
f you require technical support, contact AEV SERV CE giving a clear and concise account of
your specific problem. Quote the serial number of your equipment by referring to the AEV
nameplate attached to the equipment itself as this is the most important piece of information
to be provided.
Factory Service
f problems arise while the equipment is being installed, consult this manual and check that
the installation is being carried out properly. f the problems still cannot be solved, call the AEV
SERV CE Department for further information. f the problem is a minor one we can a telephone
call will probably suffice. f, on the other hand, the equipment is to be shipped to AEV for
service or repairs, the AEV SERV CE Dept. will accept it only if the RMA return authorisation
number has been provided. This number must be included in the shipping documents. We also
recommend providing a detailed description of the fault which has occurred, the type of service
needed and (if required) the name of the employee at the AEV SERV CE Dept. you have
spoken to. No repairs will be made if the cost of shipment is charged to AEV. n this case, we
will not accept the delivery.

AEV ITB201 - dual telephone hibryd
AEV Broadcast srl - via della Tecnica 33, 40050 Argelato Bologna ITALY
www.aev.eu [e-mail]
3
Shipping Instruction
When shipping the equipment to AEV, use the original package in order to be certain that it will
be fully protected during handling . f you need the original package, call us for a new one.
f you ship the equipment in a different packing container, take care to provide a double
package by interposing padding material between the two containers in order to fully protect
the equipment during shipment. The package should be marked "FRAG LE" in red.
IMPORTANT: Carefully read this paragraph as it contains important instructions concerning
operator safety and directions regarding the installation, operation and maintenance of the
equipment.
Failure to observe the safety instructions and information given in this manual constitutes an
infringement of the safety rules and design specifications provided for this piece of
equipment. Futurcom. declines all responsibility if any one of the safety rules given
herein is not observed. Futurcom declines all responsibility if the end-user resells the
product.
• Keep this manual with the utmost care and close at hand so that it can be consulted
whenever needed
• After unpacking the equipment, check it for condition.
• Avoid banging the equipment.
• The packing material (plastic bags, polystyrene, nails, etc.) must never be left within the
reach of the children, as these items are potential sources of danger.
• Do not use the equipment in places where the temperature is not within the recommended
range, as specified by the manufacturer.
• Before connecting the equipment, make sure the nameplate specifications correspond to the
mains electricity supply (the nameplate is located on the equipment enclosure).
• Do not remove the sticker from the equipment as it contains important specifications and the
relevant serial number.
• To join the equipment to the mains supply, use the power cord purchased with the
equipment.
• The equipment must be used only for the purpose it was designed for.
• Abuse or misuse of the equipment is extremely dangerous for people, pets and property.
The manufacturer declines all responsibility for damage and injury resulting from improper
use and mishandling.
• Certain basic safety rules must be observed when using electrical equipment, in particular:
- Never touch the equipment with wet and/or damp hands or other parts of the body.
- Keep the equipment away from drops of water or sprinkling systems.
- Never use the equipment near high heat sources or explosive material.
- Do not introduce any extraneous matter into the equipment.
- Do not allow children or untrained people to use the equipment.

AEV ITB201 - dual telephone hibryd
AEV Broadcast srl - via della Tecnica 33, 40050 Argelato Bologna ITALY
www.aev.eu [e-mail]
4
Contenents
Guarrantee ..........................................1
Precaution............................................1
Technical support ....................................1
Factory Service . . .................................1
Shipping Instruction..................................2
Safety precautions....... ............................3
Contenents. ..........................................4
Telephone Hybrid......................................5
General Features .....................................5
Intallation...........................................6
The front panel.......................................6
The rear panel........................................6
Connection to mixer and lines.........................7
Line Hook.............................................7
Adjusting level................................... ...7
Line compensation ....................................7
Technical data........................................7
Audio levels..........................................7
Hybrid circuit........................................7
General Data..........................................8
Connection............................................8
Remote................................................8

AEV ITB201 - dual telephone hibryd
AEV Broadcast srl - via della Tecnica 33, 40050 Argelato Bologna ITALY
www.aev.eu [e-mail]
5
Telephone hybrid
A telephone hybrid is a system that provide the connection between a telephone line and
an audio equipment. Actually, this is not a simple connection since the telephone line
characteristics require special techniques to ensure good audio quality and high
immunity to interference. The frequency response of a normal telephone line is set between
100 Hz and 3-4 KHz in order to guarantee an acceptable reproduction of the human voice. A
telephone hybrid must have a much wider bandwidth, in order to adapt itself to the quality of
any line and to avoid further limitations to the system. Unfortunately telephone lines suffer
often of intense disturbances, noise, crackling, fading etc. Furthermore they are often sources
or conductors of static charge and overvoltage, that are able to destroy circuits which have
been imprudently connected to them. n addiction, the resistive and capacitive behaviour of
lines is not uniform, and thus barely repeatable, and clearly the transmitted audio quality will
vary with time. t is therefore necessary to take particular care in the design of line-audio
interfaces in order to avoid significant degradation of the bandwidth or rejection of induced
interference. The interface must also ensure complete electrical isolation between theline
section and that connecting to the audio equipment.
Another problem arises during a telephone connection between a remote correspondent
and an interviewer or DJ; the DJ’s voice will be transmitted down the telephone line and,
since the same line is used for transmission and reception, will be received again with
delay with respect to the original. t will be re-amplified and looped back resulting in
whistles and Larsen effects. Antilocal circuits are fitted to remedy this by identifying those
audio components which tend to enter into the loop and eliminating only the part which
re-enters. This is particularly necessary for Meetings
General Features
AEV TB-201 MK is a studio telephone hybrid. t is designed in a 19", 1 unit rack mount.
TB-201 MK allows the connection of 2 phone lines individually commutable during
transmission. By means of an extra telephone, to be plugged into 2 special connectors, you
may call or receive on both lines. The calls are visualized by leds and announced by a ringer.
TB-201 MK was specially designed to solve all interfacing problems between lines and any
Mixer having no telephone module. t allows to call or receive private communications or to
pass them over to the antenna without having to use additional headsets or microphones.
t is easy to install and requires no special instruments. TB-201 MK has an available output
to record phone conversation both privately and in antenna.
Installation
AEV TB-201 MK telephone hybrid has been designed and manufactured to conform to
urrent safety standards. The unit should only be installed by competent personnel and in
compliance with operator safety requirements and the environmental specification.
Great care should be taken in making earth and ground connections to the unit and
associated equipment. As for any electronic apparatus, adequate ventilation for cooling must
be ensured in order to guarantee operating temperatures within the limits defined in the
Technical Specifications section.
This is particularly important in the case of rack mounting or installation in confined or poorly
ventilated locations. t is advisable to leave a space between each unit and adjacent units

AEV ITB201 - dual telephone hibryd
AEV Broadcast srl - via della Tecnica 33, 40050 Argelato Bologna ITALY
www.aev.eu [e-mail]
6
(above and below) even if mounted in a ventilated rack. f well connected to the rack’s ground
and earth connections, the unit will be immune to interference including RF, as long as the
high frequency units have been correctly connected. The AEV TB-201 MK is anyhow fitted
with RF filters on its inputs in order to eliminate annoying interference. Gas discharge tubes
are fitted to the telephone lines to guarantee immunity from static charges or over-voltage.
General Description
Front anel
1 2 3 4 5 6 7 8 9 10
1 ) HOOK LIN 1 Hooks line 1 (equivalent to pick up the handset)
2 ) LINE SELECTION Selects the line to be put on air
3 ) HOOK LIN 2 Hooks line 2 (equivalent to pick up the handset)
4 ) BUZZER OFF/ON Buzzer enable Button
5 ) LIN ADJ Antilocal effect adjustment trimmer
6 ) STAND BY Stand By phone line Button
7 ) RECEIVE Adjusts the phone line receiving level
8 ) MIX Adjusts the phone line transmission level Rx and / or Tx
9 ) SEND Adjusts the phone line transmission level
10 ) OWER Power Led
Rear anel
1 AC OWER Line power socket
2 SEND Audio input
3 REC Phone call recording output
4 RECEIVE Audio output
5 TEL LINE 2 Service telephone connection (connector RJ45)
6 TEL SET 2 Telephone line connection (connector RJ45)
7 TEL LINE 1 Service telephone connection (connector RJ45)
8 TEL SET 1 Telephone line connection (connector RJ45)
9 REMOTE Remote function connector (DB9)

AEV ITB201 - dual telephone hibryd
AEV Broadcast srl - via della Tecnica 33, 40050 Argelato Bologna ITALY
www.aev.eu [e-mail]
7
Connections to mixer and lines
The connection of the AEV TB-201 MK to 2- wire telephone lines is made by inserting the
telephone cable into the corresponding socket on the TB-201 MK using a standard telephone
line connector.
Other telephonic equipment may be connected by inserting a standard connector in the
ppropriate TB-201 MK socket. This additional equipment is useful for making calls and
checking the line. Connection is optional.
The mixer output should be connected to the hybrid’s TX TEL input, whilst the line return RX
TEL can be connected to an input connected to the CUE of the same mixer.
WARNING: T AKE GREAT CARE IN CONNECTING LOO - BACKS TO THE MIXER . F AILURE TO DO SO CAN GENERATE
HUM , ECHOES AND “ TUBE ” EFFECTS .
Line Hook
To hook a line it is necessary to lift the ( HOOK switch on the front panel).
Adjusting Levels
Once the line has been hooked, adjust the TX and RX level by injecting a 1 KHz test signal, or
a “standard” signal, and calibrate the levels for a near zero reading on the mixer.
Line Compensation
Once the telephone line is busy, it is possible to carry out an optimization through the Line
Compensation potentiometer (A.L.E.). The fine adjustment is obtained by injecting a TX
signal and receiving a minimum RX signal.
Hanging-Up
Lowering the HOOK switch on the front panel releases the line.
Technical Data
AUDIO LEVELS
nput level (SEND 1/2) ± 12 dBm
nput impedance >10 KΩ Electronically Balanced
Connector XLR female
Output level (RECE VE 1/2) 0 dBm
Output impedance 100 Ω Electronically Balanced (max load 600 Ω)
Hybrid Circuit
nput/output balanced and floating.
mpedance 600 Ω
RX Level - 20 ÷ 0 dBm
TX Level - 8 dBm
Hybrid null - 40 dB Full Band (on urban telephon line)
Frequency response 230 ÷ 3400 Hz
Distortion 0.8 %

AEV ITB201 - dual telephone hibryd
AEV Broadcast srl - via della Tecnica 33, 40050 Argelato Bologna ITALY
www.aev.eu [e-mail]
8
GENERAL DATA
Power supply 87 a 254 V 50/60 Hz 10 VA
Dimension 19" Rackmount 1 Unity
Weight 2.0 Kg
Attentino: All cables should not be more than 3 meters length.
Connection
SEND: 1-GROUND RECE VE: 1-GROUND
2- NPHASE 2- NPHASE
3-RETURN 3-RETURN
2 W RE: 2-N.C.
3-TEL. SET / TEL. L NE
4-TEL. SET / TEL. L NE
5-N.C.
REMOTE CONNECTOR
2 - Hook 1 (active low TTL input : internal pull-up 4K7)
3 – 1 / 2 SEL (active low TTL input : internal pull-up 4K7)
4 - Hook 2 (active low TTL input : internal pull-up 4K7)
9 - Rem 1 (active low TTL input : internal pull-up 4K7)
5 - + 5 Volt (50 mA max)
1 - GND
6 - GND
7 - LED 1 (50 mA max)
8 - LED 2 (50 mA max)