Summary of Contents for Eela Audio EA915X
- Page 1 USER MANUAL EA915X Digital telephone hybrid Manufacturer: Dealer: Eela audio Het Riet 8A 5431NM Cuijk The Netherlands Tel: (+31) 485 331182 Fax: (+31) 485 315505 E-mail: info@eela.info Internet: www.eela-audio.com...
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Page 2: Table Of Contents
Purpose. Realisation. Installation. Dilswitch Settings. Dilswitch 1. Dilswitch 2 & 3. Making the correct setting. Dilswitch 4. Voltageless lines. Use 2 or 4 Wire mode in EELA AUDIO consoles ? Connections. Power. Receive. Send. Line. Phone. In/Out/Remote. Alignment hybrid. Send level. - Page 3 EA915X DIGITAL TELEPHONE HYBRID INSTRUCTIONS FOR USE Flash. Update. Dilswitch. Hybrid crosstalk. Receive. Send. Limiter. A/D. Bypass. Auto answer. Faults list. Connection is lost at activating the hybrid. R-bal en C-bal alignment not satisfactory. Echo canceller does not respond. Echo canceller does not give sufficient damping.
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Page 4: Preface
EEC. The CE mark can be found on the back of the unit. The EA915X has not been approved to be connected to the direct telephone line and must therefore, due to the requirements of the telephone provider be connected only through an in-house telephone exchange (pseudo-terminal equipment). -
Page 5: Purpose
INSTRUCTIONS FOR USE Purpose. The main purpose of the EA915X is to be used as an interface to make a connection between a telephone line and a mixing console, with the highest possible quality and reliability. To obtain this purpose, the EA915X uses a Digital Signal Processor which reduces the crosstalk, normally existing in a hybrid circuitry, to a minimum. -
Page 6: Dilswitch 2 & 3
EA915X DIGITAL TELEPHONE HYBRID INSTRUCTIONS FOR USE Dilswitch 2 & 3. With these dilswitches the behaviour of the automatic control for the minimum hybrid crosstalk is set. Dependant of the application the best automatic control method can be selected. DILSW2... -
Page 7: Voltageless Lines
Use 2 or 4 Wire mode in EELA AUDIO consoles ? Because of the excellent low hybrid crosstalk, the telephone module in the EELA AUDIO mixing consoles can be set in the 4W mode (dilswitch position or central processor setting). This means talking into the return output of the mixing console to the hybrid (and to the caller) is no longer blocked when the fader is open and the hybrid is on air. -
Page 8: Receive
EELA AUDIO mixing desk using one multicore cable. The EA915x can be used with Eela Audio mixing consoles. With the Logos mixing console, a 1 to 1 (1:1) cable can be used. -
Page 9: Send Level
EA915X DIGITAL TELEPHONE HYBRID INSTRUCTIONS FOR USE order not to damage the slot of the trimpots. Send level. The hybrid is set out in such a way that when putting the SND control in the centre position the nominal input level of the SEND input is set to +6dBm. The adjustment range of the SND control is + en -12 dB with reference to this nominal level. -
Page 10: Use
INSTRUCTIONS FOR USE Use. The EELA AUDIO hybrid of course can be easily interfaced with all EELA AUDIO "telephone" modules from the S130, S340 and S440 series consoles: An incoming call is also indicated on the channel and the hybrid can be activated (diverted) from the channel. -
Page 11: Technical Specifications
EA915X DIGITAL TELEPHONE HYBRID INSTRUCTIONS FOR USE Technical specifications. Technical specifications are valid under the following conditions: • All controls in center position. • 22Hz - 22kHz Bandwidth. • 600 Ohms source and terminating impedance for line adjustments. • Voltageless line input circuitry. -
Page 12: Glossary
EA915X DIGITAL TELEPHONE HYBRID INSTRUCTIONS FOR USE Glossary. Fig.1 In fig1 the hybrid crosstalk is shown from a random connection. Note that every new test will give another result. The upper curve shows the crosstalk with the digital echo canceller switched off by means of the BYPASS switch;... -
Page 13: Codec
1 housing. Echo-canceller. System eliminating crosstalk in a hybrid circuit. Ring. Not audible call signal of the EA915X unit. Cancel. Term for eliminate or escape. Flash. Is a type of memory. This type of memory is re-writable and does not need a supply voltage to retain its data. -
Page 14: Bypass
EA915X DIGITAL TELEPHONE HYBRID INSTRUCTIONS FOR USE Bypass. Is to activate the situation where the digital echo canceller is not used (bypassed). Auto answer. Process of automatically answering an incoming call over the telephone. Is the abbreviation used for Talk Back. -
Page 15: Unsufficient Receive Signal
EA915X DIGITAL TELEPHONE HYBRID INSTRUCTIONS FOR USE Unsufficient receive signal. If this only occurs occasionally, the cause can be found in the caller or the line. If this is a continuos phenomena, the RCV control might not been aligned correct. If the signal does not contain any low frequencies, chances are that the balanced signal is not interfaced properly to a subsequent (unbalanced) input circuitry. -
Page 16: Blockdiagram
EA915X DIGITAL TELEPHONE HYBRID INSTRUCTIONS FOR USE Blockdiagram. EELA AUDIO Het Riet 8A 5431NM CUIJK The Netherlands Page 16...
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