AEV ITB201 - dual telephone hibryd
AEV Broadcast srl - via della Tecnica 33, 40050 Argelato Bologna ITALY
www.aev.eu
info@aev.eu
7
Connections to mixer and lines
The connection of the AEV ITB-201 MKII to 2- wire telephone lines is made by inserting the
telephone cable into the corresponding socket on the ITB-201 MKII using a standard telephone
line connector.
Other telephonic equipment may be connected by inserting a standard connector in the
ppropriate ITB-201 MKII 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 LOOP
-
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
Input level (SEND 1/2)
± 12 dBm
Input impedance
>10 KΩ Electronically Balanced
Connector
XLR female
Output level (RECEIVE 1/2)
0 dBm
Output impedance
100
Ω
Electronically Balanced (max load 600
Ω
)
Hybrid Circuit
Input/output balanced and floating.
Impedance
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 %
