Wegener DVT2000 Instruction Manual

Digital video integrated transmitter

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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 DVT2000-001C.

First Edition:

August 1996

Revised Preliminary: June 2000

PRELIMINARY June 2000

Instruction Manual

MODEL DVT2000™

DIGITAL VIDEO INTEGRATED

TRANSMITTER

WEGENER

COMMUNICATIONS

TECHNOLOGY PARK / JOHNS CREEK

11350 TECHNOLOGY CIRCLE

DULUTH, GEORGIA 30097-1502

(770) 814-4000 FAX (770) 623-0698

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Summary of Contents for Wegener DVT2000

Page 1 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 DVT2000-001C. First Edition: August 1996 Revised Preliminary: June 2000 WEGENER COMMUNICATIONS...
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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.
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Page 5: Table Of Contents
3.2.1 Video Input Board ................19 3.2.2 Video Compression Board ..............19 3.2.3 Audio Board ..................19 3.2.4 Multiplexer ................... 19 3.2.5 Modem ....................19 DETERMINING OVERALL BANDWIDTH ..........19 3.3.1 Occupied Bandwidth (6 dB) ..............20 Page 5 of 51 DVT2000-001...
Page 6: Section Title Page
5.5.1 Allocating Rates ................... 38 5.5.2 Setting the IF Frequency ..............41 5.5.3 Setting Encoder Number ..............41 5.5.4 Setting Other Transmitter Parameters ..........41 5.5.5 Scrambling .................... 43 5.5.6 Using the Maintenance Menu .............. 43 Page 6 of 51 DVT2000-001...
Page 7 Figure Title Page DVT2000 Digital Video Transmitter Front Panel ..........10 DVT2000 Digital Video Transmitter Front and Rear Panels ......15 Board Location ....................17 DVT2000 Bandwidth Requirements ..............21 DVT2000 System Block Diagram ..............22 Model DVT2000 Rear Panel Connections ............24 Setup Menu ......................
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Page 9: Introduction
Transmission System. The system uses the MPEG-2 compression technique, with I, B and P frames. At the transmit site (uplink), the DVT2000 transmitter converts analog or digital video and audio signals to compressed digital form and transmits them over a satellite link to the receivers.
Page 10: Dvt2000 Digital Video Transmitter Front Panel
Transmitter specifications are listed in Table 2. MPEG-2 VIDEO TRANSMITTER COMSAT COMSAT WEGENER WEGENER COMMUNICATIONS COMMUNICATIONS ® MENU: MODEL DVT2000 CONFIG. MONITOR ALARM LOCK RESET MENU POWER Figure 1. DVT2000 Digital Video Transmitter Front Panel Page 10 of 51 DVT2000-001...
Page 11 Page - 11 TABLE 1. DVT2000 DIGITAL VIDEO TRANSMITTER TECHNICAL SPECIFICATIONS TABLE 1. DVT2000 DIGITAL VIDEO TRANSMITTER TECHNICAL SPECIFICATIONS CHARACTERISTIC SPECIFICATION Input Video Analog composite NTSC/PAL; D1 Audio AES/EBU digital; Analog stereo Encoding Modulation QPSK Channel FEC Concatenated: Reed-Solomon (204/188) –...
Page 12: Technical Support
Page - 12 1.3 TECHNICAL SUPPORT Should the product fail to perform as described, contact Wegener Communications Customer Service at (770)-814-4057. To return a product for service: 1. Obtain a Return Material Authorization (RMA) by contacting Customer Service by voice at (770) 814-4057 or by FAX at (770) 232-0621.
Page 13: Factory Default Settings
Before attempting to change any of the parameters, it is mandatory that you read the instruction manual on the products. Become familiar with the menu before making changes in the setup. DEFAULT SETTING FOR DVT2000 MPEG-2 TRANSMITTER FOR CONFIGURATION "O"...
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Page 15: Section 2 - Physical Description
Figure 2. Model DVT2000 Digital Video Transmitter Front and Rear Panels 2.2 FRONT PANEL CONTROLS AND DISPLAYS The DVT2000 transmitter may be controlled from two front panel keypads—the Main keypad and Function keypad. An LCD display shows the control menus and keyboard input.
Page 16: Function Keypad
Not used. Use rear control toggle switch "down" for remote control. 2.3 REAR PANEL CONNECTORS All connections to the transmitter are made to the rear panel. The connectors and ports are described in Table 4. Page 16 of 51 DVT2000-001...
Page 17: Internal Construction
• Multiplexer board • Audio board. • Modem board Board location is illustrated in Figure 3. A Quasi-VME bus provides communication between boards. VCOMP Power Supply Video Input Fans Multiplexer Modem Audio Codec FIGURE 3. BOARD LOCATION Page 17 of 51 DVT2000-001...
Page 18 Page - 18 TABLE 4. DVT2000 Rear Panel Connections Signal Connector Description DIGITAL INPUT CCIR-601, 4:2:2 AUDIO 1,2,3* XLR-3 AES/EBU format DATA RS232, DB9 Female User data input Async DIGITAL OUT RS-422 DB-37, Female Compressed MPEG-2 transport stream MONITOR OUT...
Page 19: Introduction
When you select a data rate on the front of the DVT2000 encoder, you are actually selecting the total data rate feeding into the modulator section. In addition to the video, audio, and aux. data...
Page 20: Occupied Bandwidth (6 Db)
Video Rate = (184/204) x information rate - 1.2 x (total of all audio rates) - 1.1 x aux. data rate - 192 kbitsSEC. For example, if the DVT2000 is set for 9 Mbits/sec information rate with 2 audio channels each at 128 kbits/sec, and an aux. data channel at 9.6 Kbits/sec, then the actual video rate is: (184/204) x 9 - 1.2 (0.256) - 1.1 x 0.0096 - 0.192 = 7.61 Mbits/sec.
Page 21 Page - 21 30 Bandwidth (MHz) Page 21 of 51 DVT2000-001...
Page 22: Dvt2000 System Block Diagram
Band 70MHz High Power DVT2000 Upconverter Video Amplifier Receiver Antenna Optional Video Video Video Roofing Filter L Band DVR2000 Audio NOTE: Must be low phase-noise Control digital-grade LNB. Terminal Figure 5. DVT2000 System Block Diagram Page 22 of 51 DVT2000-001...
Page 23: Section 4 - Installation
INSTALLATION 4.1 INTRODUCTION This section contains instructions for setting up a transmitting system using the DVT2000 Transmitter. Be sure you have the Configuration Sheet for the unit available. This document shows all the defaults programmed into the transmitter at the factory.
Page 24: Unpacking And Inspection
CONTACT CLOSURE AC POWER CONTROL SWITCH Figure 6. Model DVT2000 Rear Panel Connections 4.4 PHYSICAL ENVIRONMENT The transmitter may be installed in any reasonably level rack located in a clean, dry environment. The unit will meet the full 10 to 40 C operating temperature specification only if adequate ventilation is provided.
Page 25: Control And Monitoring Connections
4.5.3.1 Terminal Connections. To use a dumb ASCII terminal to monitor or control the DVT2000, connect the device to the RS- 232 CONTROL Port with a cable wired as shown in Table 7. Alternately, an IBM compatible personal computer running a terminal emulation program may be used.
Page 26 Page - 26 TABLE 7. DVT2000 Serial Cables to Printer or Terminal ASCII Terminal or Serial Printer DB25 DB9 (DCE) (DTE) (Female) (Male) SIGNAL DIRECTION SIGNAL 8 WIRE OPTION 4 WIRE OPTION not connected not connected not connected not connected not connected 4.5.3.2 Alarm Closure Output...
Page 27: User Async Data Input
Clock In B 4.6 INITIAL START-UP PROCEDURE When power is applied initially to the DVT2000, default parameters for transmission rates are loaded. The LCD displays the top level SETUP menu, as shown in Figure 7. The Default parameters are shown on page 13.
Page 28: Additional Filter Material
Page - 28 ADDITIONAL FILTER MATERIAL Packed in the original shipping carton are two replacement air filters for the DVT2000. On the side of the unit are two air filter assemblies, each consisting of an inner cover over the fan, the foam filter, and an outer cover held to the inner cover by four built-in clips.
Page 29: Section 5- Operation
SECTION 5 OPERATION 5.1 INTRODUCTION The DVT2000 may be controlled from the front panel, or from a remote terminal. This section describes front panel controls. 5.2 FRONT PANEL CONTROLS The FUNCTION keypad, MAIN keypad and LCD screen comprise the Front Panel controls.
Page 30: Main Keypad
The control switch on the rear of the unit must be in the "up" position. Through these menus, you can: • configure the audio and video rates and the overall transmission plan • start and stop the system Page 30 of 51 DVT2000-001...
Page 31: Configuring The Unit
1 – Load Config 2 – Save Config 3 – View/Modify From this menu, you can: • Load a previously saved configuration--Option 1, LOAD SYSTEM CONFIG Load System Config Load Config [0 – 9] 0 – Factory Setting Page 31 of 51 DVT2000-001...
Page 32: Configuring Audio Parameters
To enter new audio parameters, access the VIEW/MODIFY PARAMS menu from the CONFIGURATIONS menu by selecting "3,” then selecting "1." The AUDIO PARAMETERS menu displays. Audio Parameters 1 – No Can 4 – Format 2 – Input 5 – Rate 3 – Layer 6 – Other Page 32 of 51 DVT2000-001...
Page 33 <ENTER>. Then press <RESET> on the FUNCTION keypad. 5.4.1.3 Viewing Layer Format To verify the layer format desired, select option "3." This verifies layer II is in use. (No other selection is available.) Page 33 of 51 DVT2000-001...
Page 34 To view the audio rate, select option "5." Ch 1: 128 kbps No change is possible on this screen. Ch 2: 128 kbps Xmit Plan to Change You will set the Audio rate when you configure the Transmission Plan. Page 34 of 51 DVT2000-001...
Page 35 1 – Delay 2 – S Rate 3 – Emphasis Option "1" adjusts the audio/visual delays to aid in achieving lip sync. Do not change unless directed by Wegener Service. 1 – 0 Zero is the default configuration for 2 – 0 each.
Page 36: Configuring Video Parameters
15 Mb. For rates from 2.5 to 6 Mb. low-resolution (352 x 480) is suggested. PAL settings are 352 x 576 and 704 x 576; refer to the specifications. 5.4.2.2 Setting GOP Type To set the GOP type, select "2." GOP Type Bidirectional (IBP) Page 36 of 51 DVT2000-001...
Page 37 FUNCTION keypad. 5.4.2.4 Selecting Format To select the video format to be output, select "4." Composite or Serial D1 The FORMAT menu displays. Format The options are Composite or D1 Composite [ENT>Accept Data] Page 37 of 51 DVT2000-001...
Page 38: Configuring The Transmission Plan
Select the rate desired, and press <ENTER>. Select Tx Rate The screen then prompts: . The default transmission rate of 09.000 Mbps is shown, with the cursor on the first, far left, "0". Page 38 of 51 DVT2000-001...
Page 39 Now you must set the AUX ASYNC rates. Rate Alloc NOTE: SYNC is a factory test option only. 1 – Data: 19.2 kbps 2 – SYNC: 0 Mbps The screen then displays the remaining available rate assigned to video. Page 39 of 51 DVT2000-001...
Page 40: Setting The If Frequency
5.5.3 Setting the Encoder Number At this time the encoder must always be "0". Select Option "3" on the TX Plan menu to view the number. Encoder No . Zero is the default for SCPC. Page 40 of 51 DVT2000-001...
Page 41: Setting Other Transmitter Parameters
Option 2, MOD, indicates CW carrier status. No selection is possible. Modulator Option 3, RS code, can be set to ON or OFF. ON establishes the RF link. OFF provides RS-422 data for MPEG recording. Page 41 of 51 DVT2000-001...
Page 42: Scrambling
To enter a new Key into the IRD a <ctrl> k should be issued. The IRD will prompt the user for a Key. The Key must be correctly entered at least two times. Page 42 of 51 DVT2000-001...
Page 43: Using The Maintenance Menu
It is necessary to use an RS-232 null modem cable when using this option. This option is used for factory testing and field operating of the software. NOTE: The Modulation Calibration option should be utilized only by qualified personnel. It requires a terminal and power meter accurate to within .1 dB. Page 43 of 51 DVT2000-001...
Page 44: Starting And Stopping The Unit
Select the option desired with the right or left arrow keys. Press <ENTER>. NOTE: STOP and RESET perform the same function. 5.7 USING THE SYSTEM Examples of various front panel operations are given in the following paragraphs. EXAMPLE 1 Page 44 of 51 DVT2000-001...
Page 45 From the Resolution menu press either the left or right arrow to select the 704x 576 parameter. Press <ENTER> to accept the change. Press the up arrow key to return to the Video Parameters menu Page 45 of 51 DVT2000-001...
Page 46 0 Mbps. Press <ENTER> to initiate the change. This selection is for factory test only and must be set to 0 Mbps for valid operation. The Rate Alloc/FEC will display the assigned video data rate. Press <ENTER> to complete the rate changes. Page 46 of 51 DVT2000-001...
Page 47 Press the MENU key to return to the main Set Up Menu. From the Set Up Menu press < 2 > to enter the System Start/Stop menu. Press Enter to start the system. It can take up to 10 seconds for the system to start. Page 47 of 51 DVT2000-001...
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Page 49 Ship-To Address: _____________________________________________________ ______________________________________________________ ______________________________________________________ Contact Name: _____________________________________________________ Phone #: ____________________ Fax #: ___________________ Complete Model #: __________________ Serial #: __________________________ In Warranty? Yes Problem: __________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Additional Comments: ________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Page 49 of 51 DVT2000-001...
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Page 51 Revisions made throughout manual. Appendix A removed. 6/1/00 Prelim Deleted second reference to Audio Board. 24, 28 Added instructions for additional filter material. Corrected Table 8, Output Connector Wiring. Added Appendix A, RMA Request Form. Page 51 of 51 DVT2000-001...