Wegener DR95 Instruction Manual
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Wegener DR95 Instruction Manual

Digital audio scpc receiver
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DIGITAL AUDIO SCPC RECEIVER
Data, drawings, and other material
contained herein are proprietary to
Wegener Communications, Inc., and
may not be reproduced or duplicated in
any form without the prior permission of
Wegener Communications, Inc.
When ordering parts from Wegener
Communications, Inc., be sure to include
the equipment model number, equipment
serial number, and a description of the part.
In all correspondence with Wegener
Communications, Inc., regarding this
publication, please refer to
DR95-/DR96-001C.
First edition:
December 1995
Revised:
June 1998
Instruction Manual
MODEL DR95/DR96
WEGENER
COMMUNICATIONS
TECHNOLOGY PARK / JOHNS CREEK
11350 TECHNOLOGY CIRCLE
DULUTH, GEORGIA 30097-1502
(770) 814-4000 FAX (770) 623-0698
R

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Summary of Contents for Wegener DR95

  • Page 1 Wegener Communications, Inc. When ordering parts from Wegener Communications, Inc., be sure to include the equipment model number, equipment serial number, and a description of the part.
  • Page 2 THIS PAGE INTENTIONALLY BLANK DR95/DR96-001...
  • Page 3 The following warranty applies to all Wegener Communications products. All Wegener Communications products are warranted against defective materials and workmanship for a period of one year after shipment to customer. Wegener Communications' obligation under this warranty is limited to repairing or, at Wegener Communications' option, replacing parts, subassemblies, or entire assemblies.
  • Page 4 THIS PAGE INTENTIONALLY BLANK DR95/DR96-001...
  • Page 5 TABLE OF CONTENTS SECTION 1 GENERAL INFORMATION Paragraph Page 1.1 INTRODUCTION...................1-1 DR95/DR96-001...
  • Page 6 3.1 ACQUISITION MODES................3-1 3.1.1 Installation Mode...................3-1 3.1.2 Tracking Mode ..................3-3 3.1.3 Fade Mode.....................3-3 3.1.4 Carrier Table Search Mode ..............3-3 i..................3-5 DR95/DR96-001...

  • Page 7: Table Of Contents

    Page 1-1 Addressable Digital Audio SCPC Transmit and Receive Systems ....1-2 2-1 Model DR95-1X Digital Audio SCPC Receiver, Front and Rear View ....2-2 2-2 Model DR96-1X Digital Audio SCPC Receiver, Front and Rear View ....2-3 2-3 DR95-1X/DR96-1X Serial Cables to Printer or Terminal .........2-6 2-4 DR95-1X/DR96-1X Serial Cables to Computer..........2-7...
  • Page 8 THIS PAGE INTENTIONALLY BLANK DR95/DR96-001 viii...
  • Page 9 GENERAL INFORMATION INTRODUCTION The purpose of this manual is to describe the proper installation and operation of the Wegener Communications Model DR95-1X and DR96-1X Digital Audio Single Channel Per Carrier (SCPC) Receivers. The DR95-1X and DR96-1X receivers are used in satellite-based digital audio broadcast networks to deliver audio and data to the receive locations (downlinks).
  • Page 10 At the receive site, a dish antenna recovers the signal and couples it to an LNB (low-noise block downconverter). The LNB amplifies and downconverts it to L-band (950 to 1450 MHz). This L- band signal is carried by coaxial cable (possibly through in-line amplifiers) to the DR95- 1X/DR96-1X. The DR95-1X/DR96-1X reverses the process described above thereby reconstructing the original data and analog audio.
  • Page 11 The diagram below illustrates how to construct the part number for a specific receiver configuration. For example, the model number for a DR95-1X at 128 kbps, with a 115 VAC power supply and U.S. line cord is DR95-1X-03-100. The model number for a similar DR96-1X unit would be DR96-13-100.
  • Page 12 Connect the terminal per paragraph 2.3.4 and turn it on. Then power up the receiver. Its initial message is the firmware version number followed by its command prompt. TECHNICAL SUPPORT In the event the product fails to perform as described, contact Wegener Communications Customer Service at (770) 814-4057. To return a product for service: 1.
  • Page 13 Sales Department at (770) 623-0096 for a list of preferred LNB converters for your application. 4) The DR95-1X/DR96-1X supplies DC power for an LNB (and perhaps line amplifiers) on the center-conductor of its RF input. Refer to table 2-1 for its loading specification. Although that DC output has a self-resetting 0.5 amp fuse, the receiver cannot function during overcurrents...
  • Page 14 50 WATTS DATA OUT BREAKER MODE RESET LNB DC OUT SERV 2 CONTACT RATING 0.1A @ 30VDC Terminal, Serial Printer, or L-band Modem 950 - 1450 MHz Figure 2-1. Model DR95-1X Digital Audio SCPC Receiver, Front and Rear View DR95/DR96-001...
  • Page 15 * * * WARNING * * * When connecting cables to “F” type connectors, apply no more than 12 inch lbs. Avoid connecting adapters directly to “F” type connectors. Use at minimum a one foot flexible extension cable between “F” type connectors and adapters. DR95/DR96-001...
  • Page 16 THIS PAGE INTENTIONALLY BLANK DR95/DR96-001...
  • Page 17 TABLE 2-1. MODEL DR95-1X/DR96-1X DIGITAL AUDIO SCPC RECEIVER, INTERCONNECT DESCRIPTIONS Connector Signal Type Description RF INPUT F-coax, female 950 to 1450 MHz signal band from LNB. +15 to +24 VDC @ 350 mA to LNB, may be disconnected using internal jumper.

  • Page 18: Dr95-1X/Dr96-1X Serial Cables To Printer Or Terminal

    SERIAL PRINTER DB25 (DTE) D95-1X/DR96-1X DB9 (DCE) (MALE) (MALE) SIGNAL INTERCONNECTION SIGNAL 8 WIRE OPTION NOT CONNECTED 4 WIRE OPTION NOT CONNECTED NOT CONNECTED NOT CONNECTED NOT CONNECTED NOT CONNECTED Figure 2-3. DR95-1X/DR96-1X Serial Cables to Printer or Terminal DR95/DR96-001...

  • Page 19: Dr95-1X/Dr96-1X Serial Cables To Computer

    D95-1X/DR96-1X DB9 (DCE) COMPUTER DB9 (DTE) (MALE) (FEMALE) SIGNAL INTERCONNECTION SIGNAL 8 WIRE OPTION NO CONNECTION 5 WIRE OPTION NO CONNECTION NO CONNECTION NO CONNECTION NO CONNECTION Figure 2-4. DR95-1X/DR96-1X Serial Cables to Computer DR95/DR96-001...

  • Page 20: Dr95-1X/Dr96-1X Serial Cables To Telephone Modem

    D95-1X/DR96-1X DB9 (DCE) AUTO MODEM DB25 (DCE) (MALE) (MALE) SIGNAL SIGNAL NO CONNECTION NO CONNECTION Figure 2-5. DR95-1X/DR96-1X Serial Cables to Telephone Modem TABLE 2-3. DEMODULATOR DATA OUTPUT, RS422 (Synchronous timing per RS449) Signal Description Ground Data-A RS422 Ckt-A of MPEG-compressed data.
  • Page 21 Ground DR95/DR96-001...
  • Page 22 TABLE 2-4. CONTROL DATA, RS232, CONNECTOR PIN-OUT (I/O referred to DR95-1X/DR96-1X receiver) Signal Description Data Carrier Detect, always pulled high internally. Data Output Data Input Data terminal ready, control input, external device (DTE) pulls high to enable output. Ground Data Set Ready, always pulled high internally.
  • Page 23 GNDD Digital ground 2-11 DR95/DR96-001...
  • Page 24 2.2.1 Desktop For the DR95-01X, set it on a hard surface so that the mounting feet can maintain clearance under the unit. Avoid stacking objects or equipment against or on top of the unit where the vent slots would be blocked. Stacking another DR95-1X/DR96-1X receiver on top is OK if the upper unit’s mounting feet can act as spacers.
  • Page 25 2.3.4.1 Terminal Connections In order to use a dumb ASCII terminal to monitor (or control) the DR95-1X/DR96-1X receiver, connect the device to the RS-232 CONTROL DATA port using a cable wired per figure 2-3. Alternately, an IBM-compatible personal computer running a terminal emulation program may be used.
  • Page 26 2.3.6 External MPEG Input Connections The connector on the rear of the DR95-01X/DR96-01X chassis labeled EXT MPEG IN provides the capability to input an MPEG data stream from an external source for decoding. The inputs must conform to the RS-422 data standard and are defined in table 2-5. The required inputs are MPEG clock, MPEG data and a Request-to-Send line which can be either active HI or active LOW.
  • Page 27 1 1 1 0 X X X X X X Local Frequency 1 1 1 1 X X X X X X Local Frequency Note: 0 = switch up, 1 = switch down X = does not matter 2-15 DR95/DR96-001...
  • Page 28 THIS PAGE INTENTIONALLY BLANK DR95/DR96-001 2-16...
  • Page 29 SECTION 3 OPERATION In this section, operation of the Model DR95-1X/DR96-1X Digital Audio SCPC Receiver will be discussed. Fundamentally, the device solves the basic problem of narrow band SCPC satellite reception while allowing maximum flexibility in human operator control. Loaded with a factory- programmed list of desired downlink carriers, the receiver is able to seek out, lock onto, and identify carriers automatically.
  • Page 30 ** APPLICABLE ONLY TO NETWORK-CONTROLLED RECEIVERS (DASHED LINES). *** A NON-NETWORK-CONTROLLED RECEIVER WILL MUTE AND JUMP TO ANOTHER CARRIER IN ITS SEARCH TABLE IF IT RECEIVES AN ILLEGAL NETWORK HEADER. Figure 3-1. Acquisition Modes, DR95-1X/DR96-1X Digital Audio SCPC Receiver DR95/DR96-001...
  • Page 31 3.1.5 Header Table Search Mode The DR95-1X/DR96-1X may be configured to operate as part of a network, that is, under "network-control" if so pre-programmed at the factory. In this case, the uplink inserts command- packets into the auxiliary data channel of the MPEG-compressed-audio data stream (in the same manner that frequency "tags"...
  • Page 32 Occasionally this behavior is inconvenient because even after cycling power, the receiver continues on in the search mode it was in before. There is a way to force the receiver to stay out of search modes and remain in “Installation” acquisition mode: trying only to acquire the last DR95/DR96-001...
  • Page 33 3.2.2 Alarms The alarm philosophy of the DR95-1X/DR96-1X receiver is: Any condition that prevents the delivery of quality audio is considered a major alarm. This sets the Status LED red (see paragraph 3.3) and de-energizes the relay whose contacts appear at the receiver rear panel (see paragraph 2.3.5).
  • Page 34 The MPEG-compressed data channel may contain an auxiliary channel of independent data. Wegener uses this side channel to send either its network-control commands, or any "E-mail" data to be routed to an attached printer. This data arrives in scrambled packets with a customer- specific header.
  • Page 35 RECEIVER CONTROL AND REPORTING There are several methods of controlling a DR95-1X/DR96-1X receiver, varying on the degree of flexibility and feedback desired. Receiver functions may be controlled from a network through the signal channel (see paragraph 3.4.3), a local dumb terminal (see paragraph 3.4.1), and a...
  • Page 36 In addition, there are commands to modify group membership, lock/unlock the receiver (to further network commands), disable/enable local control, set shared/protected network modes, and cause a receiver reset. Note that most network commands represent permanent changes to the receiver configuration, that is, the information is stored to non-volatile memory. DR95/DR96-001...
  • Page 37 Information on the specific commands and the protocol for the command packets is not within the scope of this document. Contact Wegener Communications Sales Dept. at (770) 623-0096 for more details. 3.4.4 Printer Reporting and E-mail Setup to use this mode by connecting a serial printer per paragraph 2.3.4, Control/Monitoring Connections.
  • Page 38 Refer to paragraph 2.3.4 to set up to use this mode. This special mode is called LOCAL ANCS. It is named for the proprietary Wegener network control software system. This mode is used only for network software development and debugging.
  • Page 39 Be sure that local line voltage is within 10% of nominal. C. Refer to procedure 1, “Checklist for Transmit System,” to do a simple check of the Wegener Communications transmit equipment.

  • Page 40: Checklist For Transmit System

    If there is no auxiliary data, use the “Tag Only” (ON-ON respectively) mode. If there is Wegener Communications ANCS in use, then use “Tag- Overwrite” (ON-OFF) mode. If unformatted customer auxiliary data is being passed, the card should be set in “Tag Insert”...
  • Page 41 Occupied bandwidth should equal 2.5 times the MPEG-encoded data rate. Find the peak of the signal and measure between the points 6 dB below that. The distance, in frequency, between those points is the occupied bandwidth. DR95/DR96-001...

  • Page 42: No Terminal-Mode Control Of Receiver

    Check receiver front-panel LED’s. If only the left-hand STATUS LED is red and no others are lit at power-up, there may be a serious firmware failure. Contact the Wegener Communications Service Department.

  • Page 43: No Control Of Receiver Via Modem

    If the customer has not specified otherwise in the configuration sheet, the default is ‘PASSWD’. i. If communication is established but there is trouble getting the return messages to display on the terminal or PC’s monitor, refer to procedure 2. DR95/DR96-001...

  • Page 44: Receiver Will Not Acquire Signal

    MPEG or TAG are disabled, it will be so indicated. They will need to be re-enabled by Wegener Communications personnel. If it is possible to establish a modem link from the receiver back to the factory, a service return may be avoided.
  • Page 45 At this point, the best suspects for failure are the audio encoder or the receiver’s audio decoder. If it is not possible to substitute for either, the next step is to contact Wegener Communications Service.

  • Page 46: Receiver Acquires Signal, But Later Permanently Loses Lock

    If the transmit system is unable to send ANCS command packets with valid headers often enough to satisfy the receiver, the time-out from step b may be extended using the ‘SETTIME’ command (see DR95-1X/DR96-1X manual appendix A). For example, during an initial installation, set the time-out to its maximum of 9999999 seconds (about 115 days).

  • Page 47: Receiver Will Acquire Signal, But There Is No Audio

    ON, ON, ON position!) j. The most likely suspect is now either the audio encoder or the receiver. Substitute a known good unit to isolate the defective one. If not possible, contact Wegener Communications Service Department...

  • Page 48: Receiver Will Acquire Signal, But Audio Breaks Up

    If it is not, contact Wegener Communications Service Department for instructions. h. Lastly, substitute another receiver and note the behavior; if it continues, suspect the audio encoder at the transmit end. If not the encoder, return failed receiver to Wegener Communications Service Department DR95/DR96-001...

  • Page 49: Receiver Acquires Signal But Signal-To-Noise Ratio Is Poor

    Verify system between antenna and receiver. Large swings in signal levels through a system risks creation of spurious inter modulation or increase in noise. e. As a last resort, question the link calculation which established the original transmit level. Do other similar receive sites have similar margin problems? 4-11 DR95/DR96-001...

  • Page 50: Receiver Will Not Obey Network (Ancs-Compatible) Commands

    ANCS-network command to “unlock” the receiver. h. Are command packets being corrupted? Check the “Packet Reception...” responses in the ‘RN H’ command response. i. Contact Wegener Communications Service Department if still unable to get network control of the receiver. *Includes E-Mail.
  • Page 51 APPENDIX A TECHNICAL SPECIFICATIONS MODEL DR95-1X/DR96-1X DIGITAL AUDIO SCPC RECEIVER Input Frequency Tuning Local or network control Tuning Range 950 to 1450 MHz Level Range - 45 to - 85 dBm Impedance 75 ohms LNB Power 15 to 24 volts DC @ 350 mA max.
  • Page 52 THIS PAGE INTENTIONALLY BLANK DR95/DR96-001...

  • Page 53: Appendix Bterminal Commands

    This deletes an entry in the Search Table at the specified location. Note that there must always be one entry in the table and the receiver firmware will not allow its deletion unless another valid carrier is entered in another location. DR95/DR96-001...
  • Page 54 LNB’s output will be within the legal L-band input frequency range (see table 1-1). The switch describes the way the audio outputs are to be routed. “Channel 1” is defined as the LEFT channel at the original MPEG audio encoder input, and “channel 2” is the original RIGHT channel. DR95/DR96-001...
  • Page 55 RELAYS number state For a DR96 so equipped, sets the cueing relay given by the number (‘1’ to ‘8’) to the commanded state: ‘ON’ (coil energized) or ‘OFF’ (coil de-energized). Not applicable to DR95-1X/DR96-1X. SETLNB frequency Tells the receiver the LO frequency of the antenna’s Low-Noise-Block converter, in MHz. This allows the receiver to calculate an expected L-band input frequency by subtracting it from the programmed satellite downlink frequency.
  • Page 56 "P" or "S" which indicates Primary or Secondary, respectively. If Primary mode is selected, the receiver will decode the external data stream while, and only while, the external source is active (asserting the MPEG RTS signal). If Secondary mode is selected, the receiver DR95/DR96-001...
  • Page 57 ANCS commands, it may or may not be desirable to process them. The Ignore option simply means the external data stream ANCS commands will be discarded. The Accept option means the external data stream ANCS commands will be processed. DR95/DR96-001...

  • Page 58: Reporting Commands

    Output for RC: [While locked on a valid carrier signal] "Status of Acquired Carrier" Source of Acquisition: The original source of the request to search for the signal now being received, whether commanded or automatic. Desired Frequency: Nominal satellite-downlink carrier frequency being received and tracked. DR95/DR96-001...
  • Page 59 “secondary requesters” and they will be shown in parentheses. Desired Frequency: Nominal downlink carrier frequency being sought. Offset Frequency: Pre-calculated expected frequency offset of whole satellite link. When added to above desired frequency, this is where signal is expected to be found. DR95/DR96-001...
  • Page 60 Acquisitions, Time in Carrier Search Mode: Total time receiver spent in Carrier Table Search mode. Acquisitions, Interrupted Acquisitions: Number of times receiver was requested to seek a new carrier signal while it was still trying to acquire another. DR95/DR96-001...
  • Page 61 Stereo, Reverse Stereo, Ch 1 on both services or Ch 2 on both services – status of audio switch. RN [option] Definition: Reports “network controller” status items. The option is chosen per the following: None supplied: Report defaults pertinent to network control. DR95/DR96-001...
  • Page 62 Packet Reception, Invalid Headers:** Of the packets processed, the number with invalid headers. Packet Reception, Invalid Checksum:** The number of packets ignored because the checksum computed is different from that transmitted. Packet Reception, Invalid Length:** Number of packets ignored because of invalid length. DR95/DR96-001 B-10...
  • Page 63 Packet Reception, Syntax:** Number of packets ignored because of a syntax error. Packet Reception, Other:** Number of packets ignored because receiver firmware was unable to process. THIS IS A CRITICAL ERROR! CONTACT WEGENER CUSTOMER SERVICE AT (770) 814-4057 ** Displayed only if their value is non-zero.

  • Page 64: Help Commands

    Help Menu (a summary of definitions from sections B-1 and B-2 ) will be output. Otherwise, if a particular command keyword is given, the receiver will display the command’s format and define its parameters. DR95/DR96-001 B-12...
  • Page 65 Added warning sheet for connecting F type connectors. 6/08/98 2-10,A-1 Added caution for mechanical loading and electrical overloading, and split text into “Desktop” and “Rackmount” units. Added specifications for optional 230 VAC. B-13 DR95/DR96-001...
  • Page 66 DR95/DR96-001 B-14...

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Dr96

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