AES-302N Digital Audio System

Transcription

1 Broadcast evices, Inc. Technical Reference Manual ES0N igital udio System Two Input igital udio Switcher Four Output igital istribution System KHz Bit igital to nalog onverter Without Silence Sensor Version Broadcast evices, Inc. restview venue ortlandt Manor, NY 0 Tel. () 0 Fax. () World Wide Web: Rev. 0/0

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3 Table of ontents I. Introduction II. Unpacking III. Installation and onnections IV. Features and Operation V. Initial Operations Setup Theory of Operation igital Switcher Error Switching Table. Remote ontrol Pin Out Table. VI. Specifications VII. Warranty VIII. Schematic iagrams

4 I. Introduction The ES0 igital udio System comprises of a two input ES compatible switcher, four output digital audio and digital to analog converter. The unit also has status and diagnostic error indicators for troubleshooting. The ES0 is intended for use at unattended transmitter sites or for virtually any digital switching, distribution and/or / conversion application. The unit has the capability to automatically switch inputs upon detection of loss of clock and digital error flags. In addition to these features, the unit can function as an interface standards converter. s shipped from the factory the unit is supplied with XLR balanced connectors. The unit can be configured with any combination of input/output connectors if desired. efault factory supplied connections are XLR. Optical and S.P..I.F R connections are available as options. II. Unpacking and Inspection arefully inspect the unit after unpacking and make certain that no damage has occurred during shipping. If damage is noted, contact the shipper immediately and file a claim for damages. Each unit is carefully packed and carries full insurance against damage. Inspect the packing list and make sure that the contents of the package match those described on the packing list. III. Installation and onnections Select a space in suitable E.I.. standard rack to locate the unit. etermine the local electrical power supply voltage and select the proper input voltage at the rear of the unit. s supplied from the factory, your ES0 is setup for 0 V... 0 Hz unless noted otherwise. To change the input voltage to 0 volts, simply slide the plastic cover and remove the p.c. board in the E.M.I. protected power entry module and flip it so that 0 Volts is legible from the rear as the board is placed back into the power entry module. No replacement of the fuse is necessary as the fuse supplied is rated for up to 0 V... operation. The unit is rated to run from 0/0 V... at 0 to 0 Hz operation. Make connections to the unit following good engineering practice. Supply power to the unit utilizing a three pronged grounded outlet. o no lift the electrical ground to the unit at the power receptacle as this will result in a safety hazard. In the event of ground loops, lift the ground at the offending connection only. Make certain that the unit is afforded proper ventilation in the area of the top cover vent.. igital Interface Unless ordered as an option Inputs to the switcher are balanced XLR connectors conforming to the ES standard. The unit may be ordered with SPIF or optical interface. Each XLR connection is terminated at 0 ohms as per the standard. SPIF inputs are terminated at 0hms. The balanced digital outputs are also XLR connections, which provide 0ohm transformer coupled source impedance as per the standard. gain as an option outputs can be configured for SPIF or optical interface. B. nalog Interface There is provided on the rear of the unit a left/right balanced analog output. This output is suitable for driving 00ohm balanced lines and is short circuit protected. headphone jack and volume control buttons are provided on the front panel of the unit for confidence monitoring of the incoming feed. IV. Features and Operation The ES0 igital udio System is designed to select one of two ES compatible feeds and route it to up to four balanced, optical or unbalanced digital loads. It also contains a high quality digital to analog

5 converter providing a balanced left and right output. The unit features a front panel headphone output and volume control for easy confidence monitoring. The ES0 can be used as a totally automatic switcher sensing loss of clock or any error displayed on the front panel to command the switcher to select the alternate feed. ll automatic switching functions are user defined and can be initialized with a simple IP switch setting upon installation of the unit. ommand of the switcher can also be performed manually at the front panel or remotely. Remote control of the unit is accessed through the rear panel pin connector. Simple momentary ground closure to the appropriate pin selects channels and error reset. Status of channel selected and error flag is also available at this connector. Refer to the pin out table on page for connection information. The interface is compatible with open collector command. The ES0 supplies V... for powering open collector actuators. V. Initial Operating Set up ttach input and output connections to the unit using the appropriate connector. The unit can be supplied with XLR, S.P..I.F., or optical connectors at any of the inputs or outputs. If the connector scheme supplied is not the one desired, consult the factory for a field or factory connector modification. Plug the remote control plug in and tighten the connector screws in place. You may select any or all of the error flag switching, which will command the switcher to switch to the alternate path. The no lock position S is always selected for automatic operation. Other error flags are selected by placing the designated IP switches to the on position. Refer to the theory of operation section table on page for possible settings. Once this is done, the unit is ready to be powered up for operation. The default setting is to command the switcher upon loss of clock. Once power is applied and a valid ES bit stream is applied to the selected input, the unit will default to Manual mode of operation. The LE indicator over the Manual button should be illuminated. In addition, the channel selected LE indicator will be lit. There should also be an indication of sample frequency. Press the errorreset button to clear any errors that might be indicated. If the digital audio stream feeding the active channel of the unit is valid and no errors occur the unit is ready for to be placed in the automatic mode if desired. If any of these errors occur after depressing the errorreset button, then the feed to the unit is defective and should be investigated. If all is in order, the unit is now ready for operation. ll that is left to do is to select the desired feed and then if desired, place the unit in automatic switch mode by depressing the uto button. The LE indicator will light indicating automatic control of the switcher. The unit will remain in this mode until an error is detected, loss of lock occurs, or the alternate feed is manually selected. If any of these events occur, the unit will switch to the alternate path and remain there until the error reset is performed from the front panel or remotely. Please note that the uto light will remain lit after an automatic switch but that the unit will perform no further switching until the error reset is performed. This feature insures that the unit will switch only once after error or loss of clock is detected and prevents the unit from hunting back and forth. In addition, errors and lock loss indications are held in a buffer until cleared by the errorreset button. This is provided for troubleshooting purposes. If power is lost to the unit, the ES0 will reset to Manual operation upon reapplication of power and remain in the channel last selected before power loss. Theory of Operation utomatic Switcher ircuit. The ES0 is designed to operate in automatic and manual switching modes. Upon application of power the unit defaults to the manual mode. In this mode switching between channels can only be accomplished by pressing the desired channel button or commanding the desired remote control pin. With power application pulls the clock pin of U low thus placing the I in the reset mode whereby pin Q output is pulled low. This in turn cuts off Q preventing automatic switching from occurring. epressing the uto front panel button places the unit in automatic operation. The actuation of the uto button

6 places a high on pin of U which in turn sets Q output high enabling Q. When an error or silence sense timeout occurs, the base of Q is pulled low which saturates Q momentarily. Momentary operation of Q is due to being in an initially discharged state. When Q is turned on begins to charge enabling Q to pass current. This same current passes through Q whose collector is routed to the proper coil of K, which is the signal routing relay. K fires and switches to the alternate path. No further switching will occur because the error signal is still present on the base of Q. This error signal will remain until the errorreset button is pressed. Once this occurs, Q is saturated by a V signal from the error bus. Once Q saturates Q is cutoff and begins to discharge through R. R prevents unintentional operation of the automatic switch circuit when errors are reset by momentarily cutting off Q. aids in preventing unintentional operation by holding the base of Q low until the error has had sufficient time to clear. ny or all of the errors that appear on the front panel display can be made to actuate a switching operation. Factory default is all error and silence sensing selected. To change this configuration, remove the top cover and locate S on the motherboard. Refer to table below for switch settings: Error Switch ctuation Table S oding S Unlock (must be selected for auto operation) S Parity S R S Slipped Sample S S S S Remote ontrol Pin out Table Pin Pin Pin Pin Pin Pin Pin Pin Pin No onnection Select B Input Select Input No onnection Status Relay ommon Status B Selected Status Selected Ground ommand input pins,, require a momentary closure to ground. Status connections are to dry contacts. Use no more than V on these contacts or damage to the relay can occur.

7 VI. Specifications igital Inputs: igital Outputs: nalog Output: Two ny combination of XLR, SPIF or Optical Four ny combination of XLR, SPIF or Optical Balanced L/R XLR dbm 00 Ohms Rear Panel Headphone out 00 Ohm unbalanced Front Panel Sample Rate Range: / onverter Resolution: Remote ontrol: Remote Status: Front Panel ontrols: Front Panel Indicators: Power Requirements: Operating Environment: Physical: KHz, uto etect and Lock up to bits Momentary ground closure selects channels and resets auto mode operation hannel Select ry ontact NO//N Momentary Push buttons Switcher Selection, Error Reset, uto/manual Mode Operation Select, and Volume Up/own Sample Rate, Lock Loss, Error Flags, Power Supply Status, hannel Status, uto/manual Mode 0/0 0.; 0 0 Hz. 0 0 egrees elsius Non ondensing tmosphere W X X. H Mounted via Standard E.I.. rack one rack unit occupied. Weight: LBS.

8 VII. Warranty Broadcast evices, Inc. products are warranted against failure due to faulty materials or workmanship for a period of one year from the date of shipment to the ultimate user. The warranty covers repair or replacement of defective parts at the factory, provided the unit has been returned prepaid by the user. ll shipments to the factory shall have affixed to the outside of the container an R.. number obtained from the factory. The above warranty is void if the unit has been modified by the user outside of any recommendations from the factory or if the unit has been abused or operated outside of its electrical or environmental specifications. If customer conducted field tests suggest that the unit may be faulty, whether or not the unit is in warranty, a full report of the difficulty should be sent to Broadcast evices, Inc. factory at ortlandt Manor, New York. The office may suggest further tests or authorize return for factory evaluation. Units sent to the factory should be well packed in the original packing if possible and shipped to Broadcast evices, Inc. restview venue, ortlandt Manor, NY 0. Remember to affix the R.. number to the outside of the carton. ny packages received without such R.. number will be refused. Note: freight collect shipments will also be refused. When the unit has been received, inspected and tested, the customer will receive a report of the findings along with a quotation for recommended repairs, which are found falling outside of the standard warranty. Units returned for inwarranty repairs which are found not to be defective will be subject to an evaluation and handling charge. Inwarranty units will be repaired at no charge and returned via prepaid freight. Outofwarranty units needing repair require a purchase order and will be invoiced for parts, labor, and shipping charges. When ordering replacement part, always specify ) Part number or escription, and Quantity; B) ate of Purchase, Where Purchased; ) ny Special Shipping Instructions. lways specify a street address, as shipping companies cannot deliver to a postal box. Broadcast evices, Inc. is not responsible for any other manufacturer s warranty on original equipment. Nor are we responsible for any failure, damage, or loss of property that may occur due to the installation or operation of our equipment outside of recommended specifications. Broadcast evices, Inc. may from time to time make changes to the materials used in the manufacture of its equipment and reserves the right to do so without further notice.

9 VIII. Schematic iagrams

10 B J HR V V V V R.K /W TXP R.K /W TXP R.K /W TXP R.K /W TXP UTO EF UTO EN R N00 U0 TOTX GN RLE Vcc INPUT N/ N/ RESET ERR. 0V R K /W. 0V R N00 R N00. 0V. 0V R N00. 0V U TOTX GN RLE Vcc INPUT N/ N/ U TOTX GN RLE Vcc INPUT N/ N/ U TOTX GN RLE Vcc INPUT N/ N/ V R 0K /W 00uF 0V 00uF 0V V V RSTERR R K /W R KHZ KHZ KHZ KHZ KHZ UTOENSW RNGE.K /W R 0 /W UTOEFSW. 0V R. 0V R.K /W. 0V U N00 LM0 Vi Vo S GN M S M R U N00 LM Vi Vo.K /W R U N00 LM Vi Vo S J J M U M0B LK Q RESET SET /Q GN V. 0V R. 0V V R R 0 /W R 0 /W.K /W R N R0 N00 KHZ KHZ KHZ KHZ KHZ RNGE FLE. 0V V UTOENLE UTOEFLE SELH LEH RSTERR VOLUP V UTOENSW UTOENLE V. 0V P 0 R R N00 0.uF 0V R N00 HRUL 00K /W 0.uF 0V. 0V V Q N0 R M /W R 00K /W uf V SLIPSMP R PRITY OING NOLOK SEL ELE uf V P 0 HRUL V V 00uF V 00uF V 00uF V VOLUP VOLN Q N0 R K /W SELH LEH VOLN UTOEFSW UTOEFLE S V V M S M0 R N R N R N SILENE Q N0 Q N0 V U S00 UP N IG V U S00 UP N IG V R.00K % MF. 0V SLP SMP R ERR PRITY OING UNLOKE R N R N RH RW RL V RH RW RL V LEH R.00K % MF. 0V R N R0 0K /W R 00K /W R V R 0.0K % MF R 0.0K % MF R 0K R 0K R /W.K /W.uF V LUIO J HR RUIO J HR S SW IP R0 K /W 0 SILSELIN K R.00K % MF V QGP N0 R.00K % MF.uF 0V.uF 0V SELH SELH J HR P V V 00pF 0V 00pF 0V 0 U R 0K % MF.uF 0V NE.uF 0V. 0V IGOUT. 0V R 0.0K % MF NE UB INPUTN INPUTP V V R K R K J HR 0uF 0V 0uF 0V SILENE R N LUIO RUIO. 0V R 00K V V R 00 /W R 00 /W R K. 0V NE U. 0V V HEPHONE NE V UB R /W R N J R0 N 0uF V R.K /W R N IGOUT V R K V SILSELIN R K R K K U EN EN V GN LS RESET 0 SET TS 0 LEH LEH RYH RYH TXP TXP TXP TXP V. 0V U.0 0V TORX.0 0V RXP RXP L OUT L GN V uh Vcc V uh GN SE. 0V SE. 0V. 0V 0.0 0V Title R.0 0V R R R /W R R /W R R /W R R /W R0 R /W R 0 /W R 0 /W 0 /W R R /W R0 0 /W R /W R R /W. 0V L.mH.00uF.00uF L.mH L.00uF L V.mH 0.00uF.mH T Schott0 T T T 0.00uF.00uF RSTERR SELH SELH RYOM F PT.00uF.00uF B r o a d cast evices, Inc. ES0 MIN BOR Schott0 Schott0 Schott0 LOUT INPUT INPUT ROUT Size ocument Number Rev U TORX OUT GN Vcc GN SE SE R0 0 /W R 0 /W FB FB J J J J J J J P BF J0 HSSIS B Saturday, October, 00 ate: Sheet of

11 B.K 00 RXP FROM P V V RXN F0 F F E0 E E R.K 00 R. 00 V.K 00.K 00 GN 0 E E E GN 0 E E E V R.K 00 0 R. 00 U H. 00 U H.K 00 V O0 O O O O O O O V O0 O O O O O O O R.K 00 R T V 0 V 0 PRO~ V V TXM TXM TXM0 V U V BL RST~.K 00 R Schott RNGE RXM0 RXM RXM RXM R KHZ KHZ KHZ KHZ KHZ SLIPSMP R PRITY OING NOLOK V U / /F0 PRO / RE/F M M M0 V /SBF U / EM/ EM0/ BL/SB RST S0 IP SW IP U V GN.MHZ IP 0 V TXP TXN MK SK FSYN ST 00 SW IP OS V GN N 0.K 00 R R.K 00 FLK R 00 R 00 V. 00 R.K 00 R U ST FSYN SK MK.0 POLY V RST~ V R 0 00 V V KHZ P SLIPSMP V KHZ R KHZ KHZ KHZ 0 PRITY OING NOLOK V R RNGE SEL R V FLE ELE 0 00 V 0 00 HRUL R.K 00.K R SW IP R R IP 0 S PRO~ TXM TXM TXM0 U 0/E0 U /E ERF B/E ST /F0 FSYN /F SK MK RXP RXN V GN FILT U ST LRK SLK MLK RST~ MUTE~ M0 M M M M S /H~ VREF V V uf 0V V E/F M M M M0 VERF SEL S/FK GN GN GN GN uf 0V BL V GN OUTL OUTR MUTE~ FILT LOUT OUTL OUTR FILT MOUT 0 0K 00 V E0 E E F0 F F RXM RXM RXM RXM0 V FLK BL. 00 R V T Schott SEL uf V uf V uf V uf V uf V uf V. 00 uf 0V R FROM P 0uF V V RST~ 0 uf V uf V 0uF V.K 00 FSO0 TXP FROM P TXN R 0.0K % MF 00 R 0.0K % MF 00 R 0.0K % MF 00 R 0.0K % MF 00 R 0.0K % MF 00 R0 0.0K % MF 00 0uF V. 00 V V V V NE U 00pF MI 0 00pF MI 0 U LM0MP.0 Vi GN GN Vo. 00 R 0.0K % MF 00 0uF V R0 0.0K % MF 00 NE U 0uF V 0uF V 0uF V V V uF 0V L FB L FB Title R R 0 R 0.0K % MF 00 00pF MI 0 NE R UB R 0 NE UB R R 0 NOTES:. GN & GN TIE POINT ONLY.. V & V TIE ONLY T VREG.. LL RESISTORS % EXEPT S NOTE. L FB R 0.0K % MF 00 R 0.0K % MF 00 L FB R 0.0K % MF 00 00pF MI 0 R0 R 0 LOUT ROUT Broadcast evices, Inc. ES RX/TX/EOER Size ocument Number Rev B ES ate: Wednesday, May 0, 00 Sheet of ROUT ROUT ROUT LOUT LOUT RXP RXN TXP TXN V V P 0 B

12 S S INPUT RESET ERR S VOL UP UTO EN V S S SELH LEH RSTERR VOLUP V UTOENSW UTOENLE J 0 SELH LEH LEERR S VOLN S UTOEFSW UTOEFLE V INPUT UTO EF HRUL R.K /W B B Title Broadcast evices, Inc. ES0 FRONT PNEL BOR Size ocument Number Rev ate: Thursday, September 0, 00 Sheet of