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PA G E 3 5

3.4.3

Transmission of an audio signal with the signalling switched off

FIGURE 3.4

Transmission of an audio signal without J.52 signalling

In this operating mode, 1 audio programme can be transmitted via a leased
line at a data rate of 64 to 384-kbit/s (for Layer III, up to 256-kbit/s).

POWER 115/230V

0 I

LEFT OUTPUT RIGHT

OUTPUT CMD INPUT

EXTENSION BUS

USER I/O

X.21/SLAVE 4

X.21/SLAVE 2

X.21/MAIN

X.21/SLAVE 1

X.21/SLAVE 3

X.21/SLAVE 5

LSD

RS232C

ADD.DATA

MAGIC System control

Loudspeaker, modulator

Transmission of an Audio programme

(for MAGIC COMPACT D)

MAGIC ISDN

Adapter cable X.21 <--> Ext. Bus

nx64-kbit/s

leased line

(n=1...6)

X.21 cable

(for MAGIC COMPACT DDC, DD)

X.21 cable

left

right

Audio

Channel assignment for leased line operation and Layer II encoding:

Audio

RS232C

Line X.21

HSD

LSD

Additional Data

Slot 2

Slot 3

RS232-Aux

RS485

Extension Bus

TTL User I/O

Handset

ISDN 1 ISDN 2 ISDN 3

Clock Out

CMD In CMD Out

Left In

Left Out

Right Out

Right In

Aux In

Aux Out

Dig In

Dig Out

Dig In

Dig Out

Slot 2

Slot 3

TS 1

TS 2

TS 3

TS 4

TS 5

TS 6

Содержание MAGIC ISDN

Страница 1: ...MAGIC ISDN Audio Transmission System Hardware Description...

Страница 2: ......

Страница 3: ...A U D I O T R A N S M I S S I O N S Y S T E M A S P E R I S O M P E G S T A N D A R D L A Y E R I I I I I A N D I T U R E C O M M E N D A T I O N S G 7 2 2 G 7 2 8 A N D G 7 1 1 H A R D W A R E D E S...

Страница 4: ......

Страница 5: ...nted in Germany April 1997 AVT Audio Video Technologies All rights reserved Reproduction in whole or in parts is prohibited without the written consent of the copyright owner The information contained...

Страница 6: ......

Страница 7: ...21 2 2 System concept 22 2 3 Construction of MAGIC ISDN Audio Codec 22 2 3 1 Additional options for transmission at higher data rates 23 2 4 Interface Unit 24 2 5 The Layer II III Audio Codec 27 2 6 T...

Страница 8: ...52 A1 5 Dimensions 52 A1 6 Miscellaneous 52 A1 7 Additional features 52 A1 8 Ordering information 53 ANNEX 2 INTERFACES 55 A2 1 Extension Bus 55 A2 2 Audio interfaces 56 A2 2 1 AES EBU interface 56 A2...

Страница 9: ...C O N T E N T ANNEX 4 LIST OF THE ALARMS 65...

Страница 10: ...C O N T E N T...

Страница 11: ...With the exception of the connection between PC and MAGIC system the installation is identical in both cases With the respective page carry out the described steps point by point Please ensure that t...

Страница 12: ...4 Connect the audio signal source transmit sound to the sockets 1 left and 3 right of slot 2 5 Connect the audio signal sink receive sound to the sockets 2 left and 4 right of slot 2 Transmit sound ri...

Страница 13: ...S and click on this The settings are now loaded 1 1 3 Setting up the call 1 To set up the charge display click on the CHARGES key In the panel which opens you can enter the current CHARGE FACTOR This...

Страница 14: ...n a direct line is used the prefix number to obtain an exchange line through a PABX can be suppressed if the calling number is preceeded with a sign This is important if the call is to be set up withi...

Страница 15: ...switch at front 2 Load the MAGIC ISDN factory settings Press right cursor five times now next to MEM Press down cursor once Press right cursor twice is now at INIT Press Enter The factory settings are...

Страница 16: ...or area code with the keys 0 to 9 Confirm the number with Enter The submenu NRS is then automatically displayed Enter the calling numbers With the right and left cursor keys select the required number...

Страница 17: ...AME submenu Select the required name with the left and right cursor keys and confirm with Enter A call is set up to the number stored under this name The remote end must also be operational and have t...

Страница 18: ...t the MAN ual menu item Press the down cursor key to display the MAN ual submenu With the right cursor key select the 128k menu item for a 2B channel connection The entry of the number is requested by...

Страница 19: ...emote end mode enables the MAGIC ISDN System to be correctly configured When making a call however one must be certain that the equipment at both ends uses the same signaling mode Since with the major...

Страница 20: ...hed off HSD Data rate 1 64 kbit s ISDN Protocol not set with FACT SETTINGS 1 3 2 Codec factory settings Encoder input Main analog Main output Decoder analog Coding Mode Layer III Digital output mode P...

Страница 21: ...Its main application is the transmission of one or more channels via ISDN satellite or data networks All standardised methods of data reduction for audio signals ITU T G 711 G 722 G 728 ISO MPEG Layer...

Страница 22: ...onstruction of MAGIC ISDN Audio Codec The 5 0 unit consists of a two part housing a back plane the power supply the front keypad with two line display and the front panel FIGURE 2 1shows the closed ho...

Страница 23: ...sed to transmit several high quality audio signals simultaneously A number of MAGIC system units can be cascaded for this purpose maximum of 10 Some additional settings must be made as compared with t...

Страница 24: ...ented This signalling enables on the one hand byte synchronisation which is lost at an X 21 interface and on the other hand a synchronisation between the individual data channels which is required bec...

Страница 25: ...plexing including the delay com pensation for ISDN connections To retain the maximum flexibility extensive use is made of 2TQITCOOCDNG QIKE EQORQPGPVU The 2 Block RTQXKFGU VJG KORQTVCPV ENQEMU UWEJ CU...

Страница 26: ...RAM OF THE INTERFACE UNIT DSP Bus Operator Line Data Ext Bus A D D A Converter Demux DSP Audio DSP J 52 DSP RS232C RS485 Keyboard Display 3 x So 1 x X 21 LSD HSD to Codec Command channel Digital audio...

Страница 27: ...he Flash Eproms monitors the Codec and configures it Under special control registers De emphasis Mux Level the analogue card is likewise controlled The clock can be provided in two ways synchronous wi...

Страница 28: ...y corresponds with the Codec unit except that it is not equipped with the Encoder FIGURE 2 8 BLOCK DAIGRAM OF THE LAYER II III AUDIO DECODER Decoder Layer II III V 11 TTL V 11 TTL V 24 TTL V 11 TTL UA...

Страница 29: ...arthing is not jumpered see SECTION 3 7 FIGURE 2 9 shows the main components of the Analogue board The control of the Analogue card is from the Codec unit over the so called Host Bus MUX and DEMUX are...

Страница 30: ...a Additional data for Audio signal e g RDS PAD Transmit sound right analogue Command channel transmit Command channel receive Transmit sound left analogue Receive sound right analogue Receive sound le...

Страница 31: ...embered that the bending radius of the cables should always be greater than the minimum allowed value If the MAGIC system is installed in a rack it should also be ensured that suf ficient ventilation...

Страница 32: ...etwork interface should be connected with the transmission equipment in accordance with the interface pin assignment see Appendix for the pin assignments When the So interface is selected care is to b...

Страница 33: ...ected If you use the optionally available telephone handset and connect the handset to the handset socket any other handset can also be connected you can have a normal telephone conversation with the...

Страница 34: ...nder order number 333475 Without this software op tion the maximum transmission data rate is up to 384 kbit s POWER 115 230V 0 I LEFT OUTPUT RIGHT OUTPUT CMD INPUT EXTENSION BUS USER I O X 21 SLAVE 4...

Страница 35: ...SLAVE 5 LSD RS232C ADD DATA MAGIC System control Loudspeaker modulator Transmission of an Audio programme for MAGIC COMPACT D MAGIC ISDN Adapter cable X 21 Ext Bus nx64 kbit s leased line n 1 6 X 21...

Страница 36: ...ssible mode unless this is limited by the use of further data services If MusicTAXI signalling has been selected a 2B connection is set up Several features such as an addi tional Low Speed Data channe...

Страница 37: ...dditional GND 3 6 Opening the Device NOTE The device must be disconnected from mains before it is ope ned Although a large part of the system configuration can be carried out from the outside using so...

Страница 38: ...not sel ected FIGURE 3 6 JUMPERS ON THE PLUG IN UNIT AUDIOCODEC LAYER II III ANALOGUE I 3 8 Switching on the system After all required interfaces have been connected the system can be switched on The...

Страница 39: ...cribed in the following sections FIGURE 4 1 OPERATOR PANEL OF THE MAGIC AUDIO CODEC The MAGIC operator panel consists of a two line display with 24 characters per line a keypad with the digits 0 to 9...

Страница 40: ...tree The Return Enter key confirms a selection e g activates a selected net work interface or a menu item that requires the entry of data e g a calling number Such menu items are always indicated with...

Страница 41: ...io codecs AUDIO can be configured The command channel BACKCH can be configured The High Speed and Low Speed data channels DATA can be set SYS SYStem settings All system parameters can be set and displ...

Страница 42: ...h are present are displayed LOOP LOCAL The signal is looped back at the network interface The data stream is fed into the transmission path and is also returned to the Interface Unit REMOTE The incomi...

Страница 43: ...SET submenu Call up the NRS submenu by pressing the down cursor key Mark the required service with the right left cursor keys DATA Call with data service indicator SI Default 1 6B TEL Call withTelepho...

Страница 44: ...This configuration must then be saved Saving Select SAVE with the right left cursor keys and call up the SAVE submenu with Enter Enter a name for the dialled connection The letters and characters are...

Страница 45: ...e IFACE submenu With the right cursor key select the CTRL menu CTRL submenu Press the down cursor key to call up the CTRL submenu Choosing the interface to be set With the right left cursor keys selec...

Страница 46: ...the right and left cursor keys sel ect the 192 data rate 19200 Baud and confirm with Enter Press the up cursor key to return to the selected interface submenu Setting the data format With the right le...

Страница 47: ...menu PARITY submenu Press the down cursor key to call up the PARITY submenu The star stands at the presently selected parity With the right left cursor keys select the NONE parity and confirm with En...

Страница 48: ...PAGE 48 O P E R A T I O N W I T H T H E O P E R A T O R P A N E L...

Страница 49: ...with without Bit Inversion Coding Algorithms ITU T Recommendations G 722 G 711 or GSM 3 1 kHz coded at 16 kbit s G 728 3 1 kHz at 16 kbit s Network interfaces 1 X 21 Data rate n 64 kbit s to 1920 kbit...

Страница 50: ...6 kbit s Sampling frequencies 32 44 1 or 48 kHz selectable for digital input 48 kHz for analogue input Modes of operation Mono L Mono R Mono L R 2 Dual channel Stereo Joint Stereo Audio interface Digi...

Страница 51: ...Nominal level 9 dBu Level monitoring Inputs outputs left channel right channel Threshold char 12 dB below nominal level Measures taken Alarm signal is output Sampling frequencies 32 kHz 44 1 kHz 48 kH...

Страница 52: ...A1 6 Miscellaneous EMC VDE 0878 limit class B Electrical safety EN 60950 Noise emission Max 30 dBA Temperature 5 C to 40 C Relative humidity 5 to 85 A1 7 Additional features Remote diagnosis and oper...

Страница 53: ...anel and display 337985 Power supply 321175 MAGICDCUKE unit front panel with display 326603 MAGICGZVGPUKQP unit front panel without display 326602 Cables X 21 cable male female 1 5 m 315148 TS16 X 21...

Страница 54: ...PAGE 54 T E C H N I C A L D A T A...

Страница 55: ...RS 485 1 Start bit 8 Data bits 1 Parity bit 1 Stop bit Data rate 19200 Bd 2 TXa Transmit Data 3 Ca Control 4 RXa Receive Data 5 CLK48aa Clock 256 48 kHz a Is only used if more than four systems are co...

Страница 56: ...ta interface with bit clock a byte clock can be used if it is provided by the network Socket Digital audio interface XLR Pin Signal Electrical characteristics Input Level V 11 symmetrical galvanically...

Страница 57: ...nnector X 21 Line SUB D 15 pole Pin Signal Electrical characteristics 1 SHIELD Shield Type DTE Level V 11 symmetrical Data Rat 64 to 1920 kbit Range 100 m 2 T a Transmit Data a 3 C a Control a 4 R a R...

Страница 58: ...Electrical characteristics 1 Clock Amplitude 0 5 to 1 9 Vp0 input 1 5 Vp0 output Impedance 75 unsym 2 GND Socket HSD SUB D 15 pole Pin Signal Electrical characteristics 1 SHIELD Schirm Type DCE Type...

Страница 59: ...ot pro grammed Connector Additional Data Slot 1 3 SUB D 9 pole Pin Signal v 1 Type DTE Level V 24 RS 232C Data rate 300 to 38400 bit s Range max 15 m 2 RXD Receive Data 3 TXD Transmit Data 4 5 GND Mas...

Страница 60: ...ual plug in units PCBs In the Standard MAGIC ISDN this interface is not programmed A2 6 3 User I O interface The User I O interface is compatible with the parallel interface of a PC or prin ter A log...

Страница 61: ...t Level TTL CMOS Max current 20 mA 2 DATA 0 Out 3 DATA 1 Out 4 DATA 2 Out 5 DATA 3 Out 6 DATA 4 Out 7 DATA 5 Out 8 DATA 6 Out 9 DATA 7 Out 10 ACK In 11 BUSY In 12 PE In 13 SELECT In 14 FEED XT In Out...

Страница 62: ...PAGE 62 I N T E R F A C E S...

Страница 63: ...terface Here also the leading and trailing edges of the signal change of si gnal level from 0 to 1 and vice versa are evaluated In the printer mode the interface is configured as a Centronics interfa...

Страница 64: ...an be transmitted instead of input levels at the USER I O interface The system must be operated from the PC for this purpose see the Software description A3 2 Printer mode To use this operating mode s...

Страница 65: ...n be ignored NO COMMUNICATION This message is generated by the Interface Unit and means that the Interface Unit cannot communicate with the codec If this fault should persist 1 min the unit must be sw...

Страница 66: ...PAGE 66 L I S T O F T H E A L A R M S...

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