Prima LT User's Guide
Contents
1. data with the echoed clock then the Prima LT may be located up to 4000 feet 1219 meters from the terminal equipment without concern for the encoder to clock skew CDQPrima eo fT ISDN clog Terminal Digital L Adaptor Facility and Figure 2 2 Basic Interconnection to D igital N etwork X 21 interface The X 21 interface specification is in general a very complex specification The general specification allows a mechanism for communication between the customer equipment and the network This communication path can be used for things such as dialing A sub set of the specification called the leased circuit restricts the interconnection to only clock and data and a very simple control signal The mechanical connector required is the DB15 with the pin out specified in the cbgPrima Technical Reference Manual The electrical specification for X 21 is identical to those of RS422 The X 21 interface has only one clock for both the transmit and receive signals Since the X 21 uses the RS422 electrical interface the Prima LT can use the same connector and module for both interfaces In the case of the X 21 interface the single clock is used internally for both the transmit and receive timing The selection of the type of digital interface is governed by software setup See Chapter 5 for the appropriate settings To change the hardware configuration of the DIF101 interface card between X 21 and RS422 change the position of jumper J2. 4 on the interface module The jumper on positions 1 and 2 is used for X 21 and when on positions 2 and 3 the card is set for RS422 operation 2 4 Prima IT USERS GUIDE 2 4 3 ISDN Using the TA101 Terminal Adapter Although your Prima LT does support the TA 101 terminal adapter the TA 101 is obsolete and is no longer supported by MUSICAM USA If you would like to use a TA 101 with the Prima LT please refer to the cDQPrima Users Guide available on line at www musicamusa com for setup instructions 2 4 4 ISDN Using the TA201 or TA301 Terminal Adapter The TA201 ISDN interface provides connections for one BRI S T interface and requires an external NT 1 for North American operation The TA 301 is essentially the same as the TA 201 but has a built in NT 1 and therefore can only be used in North America and countries that require the user to provide an NT 1 The TA201 has every country specific protocol software built in and does not require any ROM chip changes to be used anywhere in the world Each TA201 or TA301 ISDN interface adapter supports 2 ISDN 56 or 64 kb s B channels that can be used independently or bonded together into a 112 or 128 kb s channa One single RJ 45 connector is used for the ISDN S T connection to an external Network Termination NT 1 on the TA201 The TA301 has one RJ 45 connector used for the ISDN U connection directly to the North American ISDN network See Chapter 5 for details on TA configuratio
3. Prim IT USERS GUIDE Chapter Installation T his chapter gives installation hints and instrucions 2 Unpacking amp Inspection for mechanical defects Report any problems promptly to MUSICAM USA or your sales representative Plug the unit into the main power and turn on the unit by the rear panel power switch No adjustments for line voltage or frequency are required The front panel LCD should illuminate and display the power up boot sequence The power up sequence will take about 30 seconds to complete pon opening the shipping container examine your Prima LT 2 1 Location of Units The Prima LT has been designed to allow installation at locations with high RF fields and unstable power supplies The Prima LT may be used with any AC source between 85 and 250 VAC 47 to 63 Hz The only consideration when rack mounting your Prima LT is that enough room on the sides and top should be provided for adequate ventilation 2 1 1 Rack Mount Or Table Top Install the provided rack mount ears with the hardware provided if you will be using the Prima LT in an equipment rack For table top use carefully apply the provided rubber feet to the bottom of the Prima LT 2 2 Environmental Considerations It is important that the ambient temperature specifications are met Itis usually possible to stack Prima LT units directly on top of other electronic equipment however this should be avoided if the lower 2 1 Prima ILT USERS GUIDE equip
4. e V 35 specification is not used by the Prima LT because of its size Instead a smaller DB15 connector is used In the case of the V 35 interface the Prima LT conforms to the electrical specification but requires an adapter cable to convert the DB15 connector to the connector specified in the V 35 specification The connector and the pin out chosen for the V 35 interface in the Prima LT are a common deviant found in many systems An adapter cable is available or can be made following the diagram found in Appendix A It is important to remember that V 35 has a separate clock for transmitted and received data 2 4 2 X 21 RS422 RS449 Using the DIF101 Digital Interface Module The RS422 interface specification defines only the electrical voltages at the interface and leaves the pin out and meaning of the pins to the hardware designer The RS449 interface specification utilizes the electrical specifications of RS422 but specifies a mechanical connector RS449 equipment is therefore electrically compatible with the Prima LT RS422 interface when an adapter cable is used RS449 also specifies numerous control signals besides clock and data which are not used by the Prima LT The Prima LT RS422 interface pin out is specified in Appendix B 2 3 Prima IT USERS GUIDE The RS422 interface also has a separate clock for the transmitted and received data The RS422 interface can also echo the transmitter clock If the terminal equipment clocks the encoder
5. ment produces a lot of heat It is important that the Prima LT not be exposed to condensing humidity or fungal environments 2 3 Configuration Dependencies The Prima LT can be used with a variety of digital transmission facilities Typical applications consist of ISDN satellite and dedicated facilities The cable lengths for the interconnections can be from centimeters to kilometers and are determined by the specifications of the interface you are using It is important to use twisted pair cable with an overall shield for the compressed audio Flat ribbon cable should be avoided The audio interconnections are much less tolerant to longer cable lengths Good cable construction is a necessity for audio cables Remember whatever impairments are introduced before the signal reaches the encoder will appear at the output of the decoder 2 4 Connections to the Network The Prima LT may be equipped with a variety of digital interface modules for ISDN leased circuits and other transmission media including V 35 and X 21 RS422 protocols In addition since the RS422 interface is electrically compatible with industry standard RS449 equipment the Prima LT X 21 RS422 adapter can be used with RS449 equipment with the addition of an adapter cable Each of these digital interfaces requires clock and data to be exchanged between the Prima LT and the terminal equipment The Prima LT always expects the clock to be provided by the terminal equipment the
6. n 2 5 Rear Panel Connectors Refer to Figure 2 3 for the locations and types of the connectors discussed below The pin designations for all rear panel connectors can be found in Appendix B 2 5 1 Power amp Power Switch 1 2 The power switch is used to control the main power to the Prima LT The Prima LT is equipped with a world power supply and operation is possible at all standard world voltages and mains frequencies No internal or external adjustments or jumpers are required 2 5 2 Alarm Port 3 This is a DPDT relay output whose function is controlled by the RLS Summary Alarm Relay action See the cbgPrima Technical Reference Manual for information on the use of this feature These relay contacts are often used as a summary alarm output to indicate the failure of any major subsystem or loss of the transmission facility but can be re programmed using Prima Logic Language 2 5 Prima IT USERS GUIDE INDEX DESCRIPTION CONNECTOR Power connector Power switch Alarms Remote control port Ancillary data port Digital interface module port Analog audio output Analog audio input AES EBU or S PDIF I O Figure 2 3 Prima LT Rear Pane Connections WOON OUBRWN FE 2 5 3 Remote Control Port 4 This I O port on the Prima LT provides for RS232 or RS485 remote control For a detailed description of all remote control commands see the cbgPrima Technical Reference Manual and the cbgPrima Remote Contr
7. nce can be set to 600 ohms or gt 25 kOhms balanced Output impedance is 600 ohms or lt 60 ohms balanced 2 5 7 Digital Audio I O 9 This DB9 F connector is used for both input and output as well as external sync when the Prima LT is equipped with the optional digital audio I O Refer to Appendix A for the DB9 to XLR adapter cable required 2 7
8. ol Manual Please note that since both RS232 and RS485 interfaces share the same connector special cables are required A description of the required cables and the connector pin outs can be found in Appendix A and B 2 5 4 Ancillary Data Port 5 The Ancillary Data connector provides an RS232 bi directional interface for the transmission of asynchronous data Data rates range from 300 to 38 400 bps The data is transmitted in the same bit stream as the compressed audio The cable configuration can be found in Appendix A refer to the cbgPrima Technical Reference Manual for the required setup and configuration of this port 2 6 Prima IT USERS GUIDE 2 5 5 Digital Interface Module Port 6 The Prima LT can accommodate a single Digital Interface Module DIM Currently four different Digital Interface Modules are available TA201 and TA301 for ISDN DIF101 for RS422 X 21 and DIF102 for V 35 The interface supports the older TA101 terminal adapter but this module is no longer available from MUSICAM USA 2 5 6 Analog Audio I O 7 8 The Prima LT provides 24 bit A D and D A converters for superior audio quality The analog sections of the Prima LT are factory set to 18 dBu maximum input levels but can be adjusted to 12 or 15 dBu maximum Please contact MUSICAM USA if you require additional information or non standard O levels or impedance The Prima LT uses industry standard XLR audio connectors for analog audio Input impeda
9. refore only terminal equipment that provides clock data can be used The encoder section outputs data synchronized with the clock and the decoder expects the data to be synchronized with the clock Figures 2 1 and 2 2 show the interconnection of the Prima LT with a generic piece of terminal equipment The timing relationships are shown in the cDQPrima Technical Reference M anual available from MUSICAM USA or on line at www musicamusa com When using X 21 RS422 or V 35 interfaces the Prima LT is configured as a DTE device The data and clock lines are differential and require a pair of wires for each signal The control lines in the V 35 interface are single ended and require only one wire for each signal The X 21 control lines are differential The RS422 interface does not support any control lines 2 2 Prima ILT USERS GUIDE Any RS422 input control lines defined are ignored by the Prima LT and any output control lines defined are held at constant values Refer to Appendix B for the definition of the pins used for each type of interface CDQPrima M Encoder cock ISDN Terminal Digital L Data Adaptor Facility and Figure 2 1 Basic Interconnection to Digital N work RS422 V 35 2 4 1 V 35 Using the DIF102 Digital Interface Module Each interface defines a voltage level for each of the signals In the case of V 35 and X 21 a connector type is also defined The large rectangular connector defined in th
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