Global Microwave Systems MDT-BF3B Messenger Digital Transmitter User Manual 100 M0101X1 3

Global Microwave Systems, Inc. Messenger Digital Transmitter 100 M0101X1 3

Manual

100-M0101X1 Rev 4-22-08 Messenger Digital Transmitter - Broadcast Version – MODEL MDT- BF3B OPERATIONS MANUAL GMS, Inc. 1916 Palomar Oaks Way, Suite 100 Carlsbad, CA 92008 Tel. (760) 496-0055 Fax (760) 496-0057 www.gmsinc.com Copyright 200
100-M0101X1 Rev 04-22-08 Page 2 of 26 TABLE OF CONTENTS 1.0 Professionally Installed Device.................................................................................................................4 2.0 Important Warning and General Safety Information............................................................................5 3.0 Acronyms........................................................................................................................................................7 4.0 Introduction .....................................................................................................................................................8 4.1 Key System Features .................................................................................................................................8 5.0 Theory of Operation........................................................................................................................................8 6.0 Hardware Overview ......................................................................................................................................9 6.1 Standard MDT-B .........................................................................................................................................9 6.1.1 MDT-B Connectors .............................................................................................................................9 6.1.1.1 RF Output.....................................................................................................................................9 6.1.1.2 I/O..................................................................................................................................................9 6.1.1.3 SDI/ASI Input (optional) ...........................................................................................................10 6.1.2 Frequency Select Switches .............................................................................................................11 7.0 Software Overview......................................................................................................................................12 7.1 System Requirements ..............................................................................................................................12 7.2 Installation ..................................................................................................................................................12 7.3 MDL_B Configurator Functions...............................................................................................................12 7.3.1 Function Buttons ...............................................................................................................................14 7.3.2 Field Definitions.................................................................................................................................14 7.3.3 Pull-Down Menu Definitions ............................................................................................................15 7.3.3.1 File...............................................................................................................................................15 7.3.3.2 Configuration..............................................................................................................................15 7.3.3.3 Help .............................................................................................................................................18 8.0 Specifications ..............................................................................................................................................20 8.1 Video Encoding .........................................................................................................................................20 8.2 Audio Encoding .........................................................................................................................................20 8.3 Transport Stream ......................................................................................................................................20 8.4 RS-232 Interfaces/RCU ...........................................................................................................................20 8.5 COFDM RF Output ...................................................................................................................................21 8.6 Modulation..................................................................................................................................................21 8.7 Power ...........................................................................................................................................................21 8.8 Physical Dimensions (without mating connectors)...............................................................................21 8.9 Environmental............................................................................................................................................21 9.0 The D/C (Down Converter)/IF frequencies explained ........................................................................22 9.1 If Frequencies ............................................................................................................................................22 9.2 Local and Remote Power.........................................................................................................................22 10.0 Cable Losses............................................................................................................................................24 10.1 Coax Cable ............................................................................................................................................24
100-M0101X1 Rev 04-22-08 Page 3 of 26 LIST OF TABLES Table 1 – Safe distances.............................................................................................................................6 Table 2 - I/O DB-44 Connector Pin Out ................................................................................................... 10 Table 3 - MDT Field Definitions................................................................................................................14 Table 4 - DB-9 Connector Pin Out for the D/C........................................................................................ 23 Table 5 - RG59/U Coax Cable Losses .....................................................................................................24 LIST OF FIGURES Figure 1 - MDT-B Connectors .................................................................................................................... 9 Figure 2 - MDL_B Configurator Main Screen ......................................................................................... 13 Figure 3 - MDT Configurator Main Screen .............................................................................................. 13 Figure 4 - Select MPEG Encoder Profile .................................................................................................17 Figure 5 - Others .......................................................................................................................................17 Figure 6 - Transport Stream Setup..........................................................................................................18 Figure 7 - Channel Rate Guide.................................................................................................................19 Figure 8 - FW Version ...............................................................................................................................19 Figure 9 - BDC Connectors ...................................................................................................................... 23 Appendix Appendix A - Product outline and mounting documentation...............................................................25 Appendix B – Cable, MDT-B External Breakout for Broadcast Version.............................................. 26
100-M0101X1 Rev 04-22-08 Page 4 of 26 1.0 Professionally Installed Device The equipment as provided is intended to be professionally installed. Professional installers know how to mount the transmitter in an appropriate enclosure with sufficient heat sinking. In addition only the provided factory accessories such as the antenna and cables can be used with this device. No substitutions are allowed. This device is an intentional radiator, hence: Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment. Such modifications could void the user’s authority to operate the equipment. This manual provides information on how to operate the MDT-B as well as pertinent technical information related to the overall system.
100-M0101X1 Rev 04-22-08 Page 5 of 26 2.0 Important Warning and General Safety Information The following information is presented to the operator to ensure awareness of potential harmful RF (radio frequency) exposure and general hazards. With regards to potential harmful RF electromagnetic fields the text below is only a brief summary highlighting the possible risks and how to minimize exposure. The summary is based on OET Bulletin 65 “Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields” (1). The user should carefully read and comprehend the following before operating the equipment and for additional in depth information refer to OET Bulletin 65. 1. FCC has set guidelines (1) for evaluating exposure to RF emissions that the user must be aware of when operating GMS’s MDT-B microwave transmitter. The maximum power density allowed at 5725 – 5850 MHz is 5mW/cm2 for occupational/controlled exposure* and 1mW/cm2 for general population/uncontrolled exposure**. These are the limits for maximum permissible exposure (MPE) as called out in the FCC guidelines (for the above mentioned frequencies). 2. Exposure is based on upon the average time spent within the RF field with a given intensity (field units in mW/cm2). Hence it may be controlled (or at least minimized) by observing the safe distances and time exposed as shown in Table 1. These safe distances are calculated from equations predicting RF Fields (3) with the following assumptions: • The transmitter maximum peak power is 29.3dBm (851mW). • The antenna used has a 2dBi gain • The transmitter is used in a fixed location * “Occupational /controlled exposure limits apply to situations in which persons are exposed as a consequence of their employment and in which those persons who are exposed have been made fully aware of the potential for exposure and can exercise control over their exposure. Occupational/controlled exposure limits also apply where exposure is of a transient nature as a result of incidental passage through a location where exposure levels may be above general population/uncontrolled limits (see below), as long as the exposed person has been made fully aware of the potential for exposure and can exercise control over his or her exposure by leaving the area or by some other appropriate means. …….” (2) ** “General population/uncontrolled exposure limits apply to situations in which the general public may be exposed or in which persons who are exposed as a consequence of their employment may not be made fully aware of the potential for exposure or cannot exercise control over their exposure. Therefore, members of the general public would always be considered under this category when exposure is not employment-related, for example, in the case of a telecommunications tower that exposes persons in a nearby residential area.” (2) (1) OET Bulletin 65, Appendix A Table 1 Limits for MPE http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65.pdf (2)OET Bulletin 65, page 9, definitions of types of exposure http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65.pdf (3) OET Bulletin 65, page 19, Equations for predicting RF Fields http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65.pdf
100-M0101X1 Rev 04-22-08 Page 6 of 26 The user (and bystanders) should remain beyond the distances from the antenna at all times as stated in Table 1 when the transmitter is operating for no longer than the time periods indicated (keeping in mind this is the average time). Table 1 – Safe distances Frequency = 5725- 5850 MHZ MDTB Transmitter Peak Power = 29.3 dBm (851mW). * Antenna Gain = +2dbi Occupational /controlled exposure (5mW/cm2) General population/uncontrolled exposure (1mW/cm2) Safe Distance Average Time Safe Distance Average Time 4.64 cm 6 minutes 10.36 cm 30 minutes * NOTE: The peak power of a C-OFDM signal occurs for a short period of time. It is not continuously present. 3. The transmitter is rated at 29.3 dBm (851mW) peak RF power and is capable of harmful radiation if safe operating practices are not observed (see sections 1 & 2 above). Average power is 200 mW (23dBm) except in 64 QAM mode power drops to 100 mW (20dBm). 4. Antenna minimum safe operating distances should be observed as stated in section 2 above. It is the responsibility of the qualified end-user of this intentional radiator to control the safe distances and exposure limits to bystanders. 5. Electro-Static Discharge (ESD) precautions should be observed as a safe practice.
100-M0101X1 Rev 04-22-08 Page 7 of 26 3.0 Acronyms This section lists and describes the various acronyms used in this document. Name Meaning 16QAM 16-state Quadrature Amplitude Modulation 64 QAM 64-state Quadrature Amplitude Modulation A/V Audio/Video AES Advanced Encryption System (32 bit) ABS Messenger Basic Scrambling (8 bit) ASI Asynchronous Serial Interface C-OFDM Coded Orthogonal Frequency Division Multiplexing CVBS/Y Composite video/Luminance with S-video C Chroma video D/C Down-Converter FEC Forward Error Correction GUI Graphical User Interface I/O Input/ Output Kbaud Kilobaud per second Kbps Kilobits per second Mbps Megabits per second MDL Messenger Digital Link MDL-B Messenger Digital Link, Broadcast Version MDR Messenger Digital Receiver MDR-B Messenger Digital Receiver, Broadcast Version MDT Messenger Digital Transmitter MDT-B Messenger Digital Transmitter, Broadcast Version MER Modulation Error Rate MPEG Moving Picture Experts Group NTSC National Television System Committee PAL Phase Alternation Line QPSK Quadrature Phase Shift Keying RF Radio Frequency RX Receiver S/N Signal-to-Noise Ratio THD Total Harmonic Distortion SDI Serial Digital Interface TX Transmitter VDC Volts (Direct Current)
100-M0101X1 Rev 04-22-08 Page 8 of 26 4.0 Introduction The Broadcast version of the Messenger Digital Link (MDL) includes the Broadcast version of both the Messenger Digital Transmitter (MDT-B), the Messenger Digital Receiver (MDR-B), and one or two external Down Converters (sold separately) for frequencies exceeding the direct input of 861MHz. The MDT-B (Messenger Digital Transmitter, Broadcast version) also works with any DVB-T compliant receiver. The Broadcast version of the MDL (Messenger Digital Link) provides professional Audio/Video (A/V) interfaces and processing. All versions of the MDL use a robust digital modulation system known as Coded Orthogonal Frequency Division Multiplexed (COFDM) that provides frequency diversity and powerful Forward Error Correction (FEC) algorithms. The MDL provides a robust wireless link that is effective against the multipath interference experienced by analog systems, and provides crisp, clear pictures in the most difficult of terrains. Refer to model identifier (on-line document, 100-MNI0031X2) at GMS website, www.gmsinc.com, for available frequency and power configurations along with available options. 4.1 Key System Features • SDI, ASI, Component, S-Video & Composite Interfaces • 4:2:2 and 4:2:0 • Coded Orthogonal Frequency Division Multiplexed (C-OFDM) Modulation • Low System latency (~80ms) • Built-in MPEG-2 Encoder • Companion COFDM Receiver with Maximal Ratio Pre-Detect Diversity Reception. • Rugged and Compact Portable Design 5.0 Theory of Operation The MDT-B Broadcast version accepts either an ASI (Asynchronous Serial Interface,) SDI (Serial Digital Interface), Component, S-Video or Composite video signal and embedded audio or analog stereo audio inputs (mic or line level). The video is compressed (ASI data streams are passed through bypassing the MPEG encoder) according to MPEG-2 specifications. The MPEG-2 supports 4:2:2 or 4:2:0 chroma sampling, 422P@ML, MP@ML and SP@ML profiles and maintains the original signal’s video fidelity. The audio is compressed using MPEG Layer II compression. The audio, video and data packet PES streams are multiplexed with basic service data to indicate the service name and transmitted across the wireless link. Additionally, the MDT-B/MDR-B combination employs a specially designed ‘low delay’ coding technology, which provides an end-to-end latency of approximately 80ms without the introduction of any further MPEG encoding artifacts. This ensures that the picture you see is what is happening now – crucial for applications such as sports coverage.
100-M0101X1 Rev 04-22-08 Page 9 of 26 6.0 Hardware Overview There are two basic transmitter configurations: the standard MDT-B and the inline professional camera unit (this is an optional enclosure for mounting the standard MDT- B in professional camera applications). The hardware for each configuration is shown below: 6.1 Standard MDT-B Figure 1 - MDT-B Connectors 6.1.1 MDT-B Connectors There are three connectors located on the MDT-B unit as shown in Figure 2. They are for interfacing the RF, SDI/ASI, audio, video, power, and RS-232 signals. 6.1.1.1 RF Output The MDT-B uses a female SMA bulkhead connector for its ‘RF Output’ port. 6.1.1.2 I/O The ‘I/O’ connector is a male, high-density DB-44. It is used to provide the interface for external power, audio, analog video and RS-232 signals. The MDT-B has a separate RS232 channel (labeled “Control” on the external breakout cable) for control and monitoring the unit. GMS MDLB Configurator software program (as explained in section 6) makes use of the RS232 control lines. The RS-232 channel utilizes a 3-wire configuration. The pin out for the DB-44 Connector (I/O and Power) “RF OUT” (SMA) Connector Frequency Select Switches. “SDI/ASI Input” (BNC Connector) SW100
100-M0101X1 Rev 04-22-08 Page 10 of 26 I/O connector is shown in Table 1. NOTE: A USB connector and an additional RS232 channel ( labeled “DATA”) are currently provided with the external breakout cable . The USB interface is an alternate method of interfacing to the PC if DB-9 connectors are not available. The “Data” RS232 channel is dedicated for low-rate data to be transmitted along with the audio and video. 6.1.1.3 SDI/ASI Input (optional) A BNC connector is provided for Serial Digital or Asynchronous Digital data streams. Table 2 - I/O DB-44 Connector Pin Out Pin Signal Notes 1 RS232 Data Tx 2 RS232 Data Rx 3 RS232 GND 4 Not connected 5 SDA I^2 C bus 6 SCL I^2 C bus 7 CVBS/Y Dual use input. 1. Composite video in; 2. Luminance in (when used with S or Component Video). Must be selected with GMS Control Software or through the front panel of the in-line camera mount box 8 GND GND for composite video 9 C/Pr Dual use input. 1.Chroma video (when used with S-video); 2. Pr (red component when used with Component Video). Must be selected with GMS Control Software or through the front panel of the in-line camera mount box. 10 GND GND for chroma video/Pr component 11 Pb Blue component when used with Component Video. 12 GND GND for Pb component 13 GND GND 14 11-15Vdc Input power to unit 15 Not connected 16 USB power, Reset 17 USB Data - 18 USB Data + 19 USB Gnd 20-29 Not connected 30 PA_Shut_DN Provides TTL level [+3V] signal for control of external PA 31 RS232 Control Tx 32 RS232 Control-Rx 33 RS232 GND 34-36 Not connected 37 Audio right + 38 Audio right - 39 Audio right line opt. Pin 39 is connected to pin 38 for audio right channel input impedance of 600 ohms , balance in (mic or line level) 40 Audio right GND 41 Audio left + 42 Audio left - 43 Audio left line opt Pin 43 is connected to pin 42 for audio left channel input impedance of 600 ohms; balance in (mic or line level). 44 Audio left GND
100-M0101X1 Rev 04-22-08 Page 11 of 26 6.1.2 Frequency Select Switches There are four external rotary switches mounted into the chassis of the MDT-B (see Figure 2). They are used to control RF frequency selection. Frequency selection can also be controlled through GMS control software; see section 6. The rotary switches can be disable or enable using GMS control software; refer to section 6.3.3.2 under Configuration/Special Setup/Others. The most significant switch (SW100) represents 1000MHz (0-9) units, the second switch (SW101) represents 100MHz (0-9) units, the third switch (SW102) represents 10MHz (0-9) units and the fourth switch (SW103) represents 1MHz (0-9) units. For example with the switches in the following positions, the frequency will read 5800MHz: And with the switches in the following positions the frequency will read 5825MHz: Note the following: if the switches are selected for a frequency outside the range of the frequency band of the MDT-B: the transmitter will default to the high side of the frequency band if the switches are set for a frequency higher than the transmitter frequency band. It will default to the low side of the frequency band if the switches are set for a frequency lower than the transmitter frequency band.
100-M0101X1 Rev 04-22-08 Page 12 of 26 7.0 Software Overview Configuration, control and monitoring of the MDT-B unit are done by using GMS’ optional (sold separately) MS Windows-based MDL_B Configurator software program. This Graphical User Interface (GUI) program provides the end user with a straightforward way to interface with the MDT-B unit. During normal operation, once a MDL-B link is established, the MDL_B Configurator GUI does not need to be active and can be disconnected from the MDT-B unit. 7.1 System Requirements The MDL_B Configurator program has been developed and tested on Windows 2000, Windows XP and Windows NT. Although the MDL_B Configurator program may work properly on other operating systems, only the Windows 2000, Windows XP and Windows NT environments have been used at GMS and no support or assistance can be provided concerning other operating systems. 7.2 Installation The following instructions outline the installation process for the MDL_B Configurator program: 1. Insert provided CD-ROM into computer. 2. Click on ‘setup.exe’ file. This will launch the GMS_MDL Setup program and several initial setup files will begin to be copied onto the computer. 3. After the initial setup files are copied over, the GMS_MDL Setup program will prompt the user to close any applications that are running. Once all other programs are exited, click on the ‘OK’ button. 4. The GMS_MDL Setup program will prompt the user to click on the ‘computer icon’ button to begin installation. If desired, the user can change the destination directory from the default. Click on the ‘computer icon’ button. 5. The GMS_MDL Setup program will then prompt the user to ‘Choose Program Group’. If desired, the user can change the program group from the default. Click on the ‘Continue’ button. 6. After quickly installing the MDL Configurator program, the GMS_MDL Setup program will put up a window indicating that setup was completed successfully. Click ‘OK’. 7.3 MDL_B Configurator Functions The MDL_B Configurator program provides the user access to many different configuration, control and monitoring options. When the MDL_B Configurator program is launched, the screen shown in Figure 4 is displayed. The user should first select the serial port their computer is connected to via the Serial Port Selector and Status region. If the selected serial port is valid, the gray-colored status box will show ‘Ready’. The Device Selector region allows the end user to choose to interface to a MDT-B or MDR-B unit. To configure a MDT-B, select the ‘MDT-B’ box in the Device Selector region. Once the ‘MDT-B’ box is selected, the screen shown in Figure 5 is displayed. The MDT-B Configurator program contains function buttons and all the configurable settings available on a MDT-B. The following sections explain, in detail, the various options.
100-M0101X1 Rev 04-22-08 Page 13 of 26 Figure 2 - MDL_B Configurator Main Screen 5800 Figure 3 - MDT Configurator Main Screen
100-M0101X1 Rev 04-22-08 Page 14 of 26 7.3.1 Function Buttons • “Enable All” Button: Clicking on this button enables all the check boxes on the screen. This operation is done to prepare all the fields to be written to (or read from). Alternatively, the end user can individually select a given field by using the mouse and clicking its corresponding check box. • “Disable All” Button: Clicking on this button disables all the check boxes on the screen. This operation is done to inhibit all the fields to be written to (or read from). Alternatively, the end user can individually deselect a given field by using the mouse and clicking its corresponding check box. • “Query” Button: Clicking on this button performs a read operation on all the fields that have their check box enabled. Once clicked, all the selected fields will be read back reflecting their current configuration. • “Update” Button: Clicking on this button performs a write operation on all the fields that have their check box enabled. Once clicked, all the selected fields will be written to with the value denoted in their respective field. • “CLR” Button: Clicking on this button clears out all fields on the screen, regardless of whether the fields’ check boxes are selected or not. This button proves useful when the end user wants to verify that a write operation has been correctly performed. An example scenario would be to 1) enable all fields, 2) change desired field(s), 3) perform a ‘Update’ (write) operation, 4) perform a ‘CLR’ operation and 5) perform a ‘Query’ operation. As a result of the ‘Query’ operation, the fields on the screen should all update to those values that were written during the ‘Update’ operation. • “Store All Setup Pages” Button Clicking on this button will store all setup pages, even if they are not shown. 7.3.2 Field Definitions There are several different fields that can be configured by the MDT-B Configurator. The fields located in the main screen of Figure 5 and their associated values are defined in Table 3 below. Also noted in the table is whether the field is read, write-able or both Table 3 - MDT Field Definitions Field R/W Description Unit Name R/W Allows the user to assign a unique unit name to the MDT. Unit Number R/W Allows the user to assign a unique unit number to the MDT RF Freq (MHz) R/W RF output frequency. Desired frequency is entered in MHz (i.e., 5.800 GHz would be entered as 5800).
100-M0101X1 Rev 04-22-08 Page 15 of 26 Field R/W Description Modulation Mode R/W Modulation mode. Desired modulation mode is selected from the following values: C-OFDM (default) Off (shuts off modulation) or I/Q CAL ON (puts unit in calibration mode). C-OFDM Bandwidth R/W C-OFDM transmit bandwidth. Desired bandwidth is selected from the following values: 6, 7 or 8 MHz. C-OFDM Mode R/W C-OFDM modulation type. Desired C-OFDM modulation type is selected from the following values: QPSK, 16QAM or 64QAM Mod Guard Interval R/W Modulation guard interval size. Desired modulation guard interval size is selected from the following values: 1/32, 1/16, 1/8 or ¼. Modulation FEC R/W Modulation FEC (Forward Error Correction) rate. Desired modulation FEC rate is selected from the following values: ½, 2/3, ¾, 5/6, 7/8. Channel Rate (Mbps) R Channel rate is displayed based on parameters selected such as COFDM mode, FEC and Guard Interval. Input Mode R/W Choice between Analog video, SDI (serial digital interface) or ASI (asynchronous digital interface) Video Input R/W Video input format. Desired video input format is selected from the following values: PAL, NTSC w/ Pedestal, NTSC, S-video PAL, S-video NTSC, and Component Video. Some of these choices may or may not be shown in the pull down box depending on which user profile has been loaded. Video Locked Status R Analog video lock status. This read-only field indicates that the MDT-B has line-locked onto the analog video input signal [not applicable when the “Input Mode” is set to either SDI or ASI] Audio Enable * R/W Analog audio encoder enable. Desired mode of operation of the audio encoder is selected from the following values: Off or On. Audio Mute * R/W Choice between mute or un-mute audio stream Audio Level * R/W Choice between mic or line level audio Audio Gain * R/W Adjustable gain between 0- 100 * Not applicable for embedded audio applications. 7.3.3 Pull-Down Menu Definitions There are several different pull-down menus that are included in the MDT-B Configurator program. Each of these pull-down menus contains further user-configurable options or commands. The following sections describe these menus in detail. 7.3.3.1 File This pull-down menu offers to exit the MDT-B Configurator program or to “Save Parameters”. Alternatively the ‘X’ box in the upper right hand corner of the window can be used to exit the program. And alternatively the “Store All Setup Pages” button on the main menu will save all parameters. 7.3.3.2 Configuration This pull-down menu contains several different configuration options. These are outlined below:
100-M0101X1 Rev 04-22-08 Page 16 of 26  Special Setup o Load MPEG Encoder Profile (see figure 4) – This menu displays the current profile loaded and also presents possible profiles to load. Select the profile from the pull down box (or use the browse button to point to area where other profiles are located). Then click on the “Download Profile” button. A progress bar appears which shows the profile loading. After the profile has been downloaded it’s necessary to click on the “Store all Setup” button for the profile to be saved. Once the profile is stored a message box appears indicating the profile is stored. If the message box states the process failed then click on the “Store All Setup” button again. Repeat until the message box indicates the profile is stored. o Others (see figure 5)- This menu displays the following:  COFDM Spectrum Inversion choices include normal or invert. The transmitter is configured with the receiver it ships with and the inversion mode shouldn’t have to be changed. However if a different receiver is used the inversion mode may have to be changed. Some receivers will accept either inversion mode. Check the parameters of the receivers to ensure the correct inversion mode is selected.  Frequency switch – choices offered are enabled or disabled. These are the four frequency select switches discussed under section 5.1.1.3. If disabled the switches will not respond to changes (frequency changes could still be accomplish by changing the “RF FREQ (MHz”) field in the GMS MDLB control software. Enabling them allows the frequency to be changed when the switches are changed. Factory default enables the switches (keep in mind that you must click on the “Store All Setup Pages) for the choice to take place.  Video Filter Type-Pull down box offers various filter types for optimizing picture. The choices include: LPF OFF, LPF C, LPF Y, and LPF YC.  Video Filter Frequency- Pull down box offers various filter frequencies for optimizing picture. The choices include: AUTO, 12.15MHz, 10.6MHz, 9.45MHz, 8.1MHz and 6.75MHz.  Transport Stream (see figure 6) – The transport stream menu displays the parameters of the current transport stream (of the transmitter). The fields are read/write-able. Normally the fields require no manipulation and should work quite well as defaulted from the factory. However, high end users may have a need to change the transport stream parameters.  Ctrl Port Baud Rate- The control port baud rate menu allows different baud rates to be selected when attached to the PC RS232 port. Some computers may need the baud rate adjusted for optimal communications  Factory Setup – The menu is for factory use only.
100-M0101X1 Rev 04-22-08 Page 17 of 26 Figure 4 - Select MPEG Encoder Profile Figure 5 - Others
100-M0101X1 Rev 04-22-08 Page 18 of 26 Figure 6 - Transport Stream Setup 7.3.3.3 Help This pull-down menu contains information about the MDT firmware and the MDL Configurator software. This information is outlined below:  Channel Rate Guide: This selection pulls up a table which displays the relationship between the Modulation mode, Modulation Guard Interval and FEC mode. Table values will change depending on COFDM Bandwidth selected. See figure 7.  FW version: This selection pulls up a window that displays the MDT-B current Profile Index (current loaded profile), the Profile Description, the Software Version, the FPGA Version and Serial Number. See Figure 8.  About: This selection pulls up a window that displays the Version Number of the GMS MDL_B Configurator program.
100-M0101X1 Rev 04-22-08 Page 19 of 26 Figure 7 - Channel Rate Guide Figure 8 - FW Version
100-M0101X1 Rev 04-22-08 Page 20 of 26 8.0 Specifications The following sections outline the overall specifications for the MDT unit. 8.1 Video Encoding Interfaces: SDI, Component, Composite or S-Video Input Standards: NTSC or PAL Compression Standard: MPEG-2 (per ISO/IEC 13818-2) Profiles: 422P@ML, MP@ML, SP@ML Video Bit Rate: 2Mbps to 15Mbps (MP@ML) 3Mbps to 25Mbps (422P@ML) Chrominance Profile: 4:2:2 or 4:2:0 Line Standard: NTSC: 525 or 480 PAL: 625 or 576 Horizontal Resolution: 720 pixels Vertical Resolution: 480 (525 line) and 576 (625 line) System Latency end to end delay: <80ms (super low latency mode) 8.2 Audio Encoding Analog Audio: Dual, Line-Level or Mic-Level, Differential or Single-Ended, Clip Level 12dBm Impedance: 600 Ohms input impedance (changeable to 2K Ohms) Compression Standard: MPEG layer II Audio Enable: On or Off Bit Rates: Up to 384kbit/s/ch Sampling Frequency: 32kHz, 44.1kHz or 48kHz THD: < 0.1% maximum Response: 20Hz to 12kHz, +/- 0.25dB Crosstalk: >55dB minimum S/N: >60dB RMS 8.3 Transport Stream Standard: per ISO/IEC 13818-1 Packet Size: 188 byte Bit Rate: Automatically set from active service settings. ASI Input: Allows MPEG2 transport stream to be inserted into the MDT-B through the BNC connector 8.4 RS-232 Interfaces/RCU Control Port: 3-wire interface (Tx,Rx,Gnd) RCU A remote portable control unit is also available Note: A USB interface is also available that serves the same purpose as the RS232 control port. In addition a “Data” RS232 channel is available which is dedicated for low-rate data to be transmitted along with the audio and video.
100-M0101X1 Rev 04-22-08 Page 21 of 26 8.5 COFDM RF Output Output Frequency: 5725 – 5850 MHz Frequency step size is 1 MHz Bandwidth: Selectable 6, 7 or 8 MHz Output Power: 851mW (29.3 dBm) peak power. Average power is 200 mW (23 dBm) except in 64 QAM mode power drops to 100 mW (20 dBm). Connector: SMA-F Note: Transmitters should not be powered on without a load. Doing so could cause the output PA to stop working. A proper heat sink is also required. 8.6 Modulation Modulation Type: C-OFDM w/ QPSK, 16 QAM or 64 QAM FEC: ½, 2/3, ¾, 7/8 Guard Intervals: 1/32, 1/16, 1/8, 1/4 Spurious: 50dBc Number of C-OFDM Carriers: 2k C-OFDM MER: > -45dB Standard: DVB-T compliant 8.7 Power DC Input Voltage Range: 9 to 15 VDC Power Consumption: 10Watts 8.8 Physical Dimensions (without mating connectors) Size: 3.25 in. (W) x 4.5 in. (D) x 1.76 in. (H) (8.26 cm x 11.43cm x 4.47cm) Weight: 13.4 oz (380.5grams) 8.9 Environmental Operational Temperature: -10 to +70 °C Humidity: Up to 100% (non-condensing)
100-M0101X1 Rev 04-22-08 Page 22 of 26 9.0 The D/C (Down Converter)/IF frequencies explained 9.1 If Frequencies • MDR-B receivers (and many other digital receivers) are capable of receiving direct frequencies in the range of approximately 49MHz to 861MHz. If the transmitter is not in this range then a down-converter is used to convert the frequency to this range. The frequency out of the down-converter is called the IF (intermediate frequency) which is fed to the receiver. Down-converters have a LO (local oscillator) which is mixed with the transmitter frequency (MDT-B) and converts it to the IF frequency. MDR-B receivers need to know the LO (local oscillator) of the down-converter and is factory programmed with this information. It then automatically calculates the IF frequency once the RF (transmitter frequency) is entered. Thus as the desired RF frequency is dialed in on the MDR-B the IF is taken care of automatically. For example, if the transmitter frequency (MDT-B) is set for 2000MHz, then the MDR-B can be set for 2000MHz (it automatically calculates the IF frequency based on pre-programmed LO information of the down-converter). The IF frequency changes as the RF frequency changes, the LO remains constant. On non-GMS receivers it may be necessary to program the receiver with the IF frequency directly. The user may have to do the simple math to arrive at the IF frequency so that it can be entered into the receiver. The down-converter LO must be known. The math involve is as follows: “ LO – transmitter frequency (or transmitter frequency – LO) = IF frequency”. For example, it the transmitter is set for 5800MHz and the LO of the down-converter is 5200MHz then the IF frequency is 600MHz (5800-5200 = 600). The receiver will need to be set to 600MHz to receive the transmitter frequency of 5800MHz. Each time the transmitter frequency is changed the IF must be re-calculated and entered into the receiver. It must also be mentioned, as you may have noticed with the equation “LO-transmitter frequency or transmitter frequency – LO” that two answers are possible. For example 5800-5200 = 600 or 5200-5800 = -600. The negative answer may indicate the receiver wants the signal to be inverted. See section 6.3.3.2 for inverting the signal. 9.2 Local and Remote Power Customers have the option of using remote or local power: • Remote power is provided from the receiver through the BNC connector IF IN #1 located on the rear panel (and IF IN #2 in the case of diversity systems with two down converters). IF PWR # 1 (and IF PWR #2 in case of diversity systems) needs to be switched ‘ON’. From the front control panel of the receiver (MDR-B) toggle through the menus until “R1 BDC POWER DISPLAY’ (or “R2 BDC POWER DISPLAY” in the case of diversity systems) is displayed. Ensure “ON” is selected (this the default mode when shipped with D/C .The +12Vdc provided from the receiver will travel through the coax cable to the D/C. If the D/C is located relatively close to the receiver then using remote power makes sense. However, if the D/C is located at great distances away from the receiver there may be excessive DC voltage drop in the coax cable (due to cable resistances). If this is the case then local DC power should be considered as discussed below. If unsure of the DC voltage drop measure the DC voltage present (using a DMM) at the end of the coax cable run. The D/C normal operating voltage is approximately +12Vdc but can operate down to +10Vdc.
100-M0101X1 Rev 04-22-08 Page 23 of 26 • Local power is provided by applying +12Vdc to pin 1, GND to pin 3 of the DB-9 connector located on the bottom of the D/C. The +12 Volt power supply must be able to source at least 500mA. The power switch (located on the side of the D/C) enables the user to control the ‘ON’/’OFF’ positions for local power. If using local power then the remote power IF IN #1 should be set to “OFF” (and RF IN #2 in case of diversity systems). Figure 9 - BDC Connectors Table 4 - DB-9 Connector Pin Out for the D/C Pin Signal Notes 1 +12Vdc Power supply must be able to source at least 500mA. Voltage should not drop below +10Vdc. 3 GND Power ground 2, 4-9 NC Not Connected DB-9 connector for local power BNC connector – IF frequency output RF Input Power Switch for local power
100-M0101X1 Rev 04-22-08 Page 24 of 26 10.0 Cable Losses 10.1 Coax Cable Cable losses must be taken into consideration if the D/C is located a great distance from the receiver. As mentioned above long cable runs can contribute to more resistance in the lines and also can contribute to signal attenuation because of the additional capacitance. Even when using a good coax cable such as RG59/U the attenuation of the signal can be significant. For example, RG59/U coax will drop approximately 2dB per 100 feet at 50MHz and 8dB per 100feet at 900MHz. The intermediate frequency (IF) in this system can fall between 49MHz to 850MHz. Cable losses in this range for an RG59/U are shown below in table 5. An inline amplifier matching the cable losses should be considered if losses exceed 6dB. Table 5 - RG59/U Coax Cable Losses • Belden cable # 1426A
100-M0101X1 Rev 04-22-08 Page 25 of 26 Appendix A - Product outline and mounting documentation
100-M0101X1 Rev 04-22-08 Page 26 of 26 Appendix B – Cable, MDT-B External Breakout for Broadcast Version 1234567891011121314151617181920212223242526272829303132333435363738394041424344P1 CVBS/Y231gnd/shieldW1P100W7BLKNOTES:SIZE DATE DWG NO REVPRODB11/9/05 100-C0224X2 X2QC SCALE:NONESHEET1 OF 5DRAWNSLPENG/TECHT. GiottaENGDWG TITLECABLE, MDT2-B EXTERNAL BREAKOUT FORBROADCAST VERSIONP2 C/PrP4CTRLP5AUDIO1W2W3W5W6W7REDN/CN/CN/CN/CN/CN/CN/CN/CN/CN/CN/CN/CN/CN/CN/CN/CN/CDATA-TXDATA-RXGNDREDWHTBLKC/Pr55195876432GNDREDWHTBLKCTRL-TXCTRL-RXREDWHTBLKGNDREDBLKGND231REDBLKGNDP6AUDIO 2AUDIO1 (RIGHT) +AUDIO1 (RIGHT) -GNDAUDIO2 (LEFT) +AUDIO2 (LEFT) -N/CUSB RESETUSB GNDUSBUSB DATA -USB DATA +1. REFERENCE BOM 780-C0224X1 FOR REFERENCE DESIGNATIONS (SHOWN AS [] ON DRAWING) AND PART DESCRIPTIONS .USBREDBLKGNDREDBLKGNDREDWHTGRNBLKGNDCVBS/YGNDP3DATA195876432REDWHTBLKGND BLK11-15VDC REDREVISIONSECOREVDESCRIPTION DATE APPROVEDE0355X1X1 INITIAL RELEASE01/19/04 SLPJ1J2DCPOWERBLKREDP7 PbPbGNDTOLERANCESUNLESS OTHERWISE SPECIFIEDDIMENSIONS ARE IN INCHESDO NOT SCALE DRAWINGLINEARX.X = ± 0.5X.XX = ± 0.125X.XXX = ± 0.020W45 THIS CABLE IS SET-UP FOR BALANCED AUDIO ONLY.3333333333 LABEL CONNECTOR WITH REFERENCE DESIGNATOR AND DESCRIPTION AS SHOWN USING BEST COMMERCIAL METHOD. LABEL TOBE WITHIN 3.0 OF CONNECTOR.2 LABEL FINAL CABLE ASSEMBLY WITH PART NUMBER 780-C0224X1 USING BEST COMMERCIAL METHOD.4 REFERENCE MANUFACTURING INSTRUCTION 100-MI0112X1.W7BLKW7REDW7FIGURE 1CABLE WIRINGDIAGRAME0422X2Correct polarity marks of USB, pins17&1811/9/05 TG

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