User`s Manual Standard Definition Messenger Transmitter (SDMT
Contents
1. 26 9 0 CABLE LOSSES sa uqu aaa aasan A au au men 28 Or Rem 28 List of Tables Table 1 1 0 DB 44 Connector Pin 7 Table 2 1 0 DB 15 Connector Pin OuL nanan 11 Table 3 SDMT Field Definitions l 15 Table 4 DB 9 Connector Pin Out for the 27 List of Figures 6 s upa a Q uns 9 Figure 3 SDMT Inline Camera Unit 10 Figure 4 SDMT Configurator Main Screen aaa 13 Figure 5 SDMT Configurator Main Screen aaa 14 Figure 6A Scrambling Mode Setup 17 Figure 6B Scrambling Mode Setup mia acere rr a ER E UR denis 17 Figure 7 Scrambling Key SEU 18 Fig re Others Men SCEOBDL u a IHR EEUU aaa GO 19 Figure 8A RF Power O f 20 Figure 9 Channel Rabe a inert tse2. Load Scrambling from a file The key code can be selected from a file The browser button can be used to search thru the Directory for a file containing the key code Once a path has been established it can be saved using the Save Path button The Load Key from File is used to retrieve a key code from a file as specified by the path Use the Exit key to close this window Transmitter Scrambling Key Setup x Enter Scrambling Key from KeyBoard Please input Scrambling Key 32 Hex Characters Load Scrambling Key from File Please Select File Name Brower m Load Key from File Save Path Exit Figure 7 Scrambling Key Setup Others see figure 8 This menu displays the following RF Output attenuation The RF out can be attenuated in 0 5 or 1 dB increments up to defined max Both increment step and max value are frequency band dependant COFDM Spectrum Inversion choices include normal or inverted 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 it may be necessary to change the inversion mode Some receivers will accept either inversion mode Check the parameters of the receivers to ensure the correct inversion mode is selected RF Power Mode Can be used to put transmitter in a sleep mode a low power mode where the encoder functions and many of the power regulators are shu
3. 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 4 1 2 Frequency Select Switches There are four external rotary switches mounted into the chassis of the SDMT see Figure 1 amp 2 They are used to control RF frequency selection manually 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 Hence the highest switch selection can be 9999MHz and the lowest is 0000 100 0065 20 For example with the switches in the following positions the frequency will read 2014MHz And with the switches in the following positions the frequency will read 924MHz 8 of 29 www cobham com gms SW100 5 9 Note the following if the switches are selected for a frequency outside the range of the frequency band of the SDMT the transmitter will default to the high side of the frequency band if the switches are set for a frequency higher than the tra
4. m 29 W6 3 ius RED done P4 CTRL WHT 3 32 CTRL RX WHT CTRL A 33 BLK BLK 15 2 34 W7 W7 WT an e RED RED 36 NIC 37 AUDIO1 RIGHT RED RED 2 P5 38 AUDIO RIGHT BLK BLK in ono 1 AUDIO A 40 W7 41 AUDIO LEFT RED Brie A 42 yrunioz LEFT BLK 43 RED 2 P6 44 GND ND BLK 3 AUDIO 2 A GND 1 BLK FIGURE 1 CABLE WIRING TOLERANCES ENG TECH T Giotta PO TEE DIAGRAM UNLESS OTHERWISE SPECIFIED COBHAM CABLE MDT2 B EXTERNAL BREAKOUT FOR DIMENSIONS ARE IN INCHES DRAWN SLP GMS Products DO NOT SCALE DRAWING BROADCAST VERSION LINEAR ENG SIZE DATE DWG NO REV X XX 0 125 29 of 29
5. NC J2 Chroma C video input when used with S video J3 YCOMP When used with J7 SDI Composite video or ASI input input When used with S or Component video Power on off awe thal Figure 3 SDMT Inline Camera WAIN ep panel wit corros 431 SDMT Inline Camera Mount Connectors There are four BNC connectors two audio XLR one DB 15 connector one N type connector and one rocker on off power switch located on the SDMT inline camera unit for interfacing the 8 Pb when used with AAA 100 M0065X2D 10 of 29 www cobham com gms RF audio video power and RS 232 signals An optional LCD control front panel is also available Inline camera mount is shown in Figure 3 4311 RF Output The SDMT in line camera enclosure uses a female N type connector flange mount for its RF Output port Note Transmitters should not be powered on without a load Doing so could cause the output PA to stop working 43 1 2 The I O connector is a female DB 15 It is used to provide the interface for RS 232 signals control and monitoring GMS SDMT Configurator software program as explained in section 6 makes use of the RS232 control lines pins 2 3 and 5 of the DB 15 connector The RS 232 channel utilizes a 3 wire configuration The pin out for I O connector is shown in Table 2 A USB connection is also p
6. PC if DB 9 connectors are not available Table 1 70 DB 44 Connector Pin Out Pin Signal Notes 1 RS232 USER Data Tx 2 RS232 USER Data Rx 3 RS232 GND 4 Not connected 5 SDA 2 C bus 6 SCL 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 15V 17 USB Data 18 USB Data 19 USB Gnd 20 29 Not connected 30 PA_Shut_DN Provides a TTL signal 3V to enable an external PA 31 RS232 Control Tx 100 M0065X2D 7 of 29 www cobham com gms 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
7. ROM into computer Click on setup exe file This will launch the GMS_SDMT Configurator Setup program and several initial setup files will begin to be copied onto the computer After the initial setup files are copied over the GMS_SDMT Configurator Setup program will prompt the user to close any applications that are running Once all other programs are exited click on the OK button The GMS_SDMT 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 The GMS_SDMT 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 12 of 29 www cobham com gms 6 After installing the SDMT Configurator program it will display a window indicating that setup was completed successfully Click 53 SDMT Configurator Functions The SDMT Configurator program provides the user access to many different configuration control and monitoring options When the SDMT 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 To configure a SDMT select th
8. Users Manual The most important thing we build is trust Standard Definition Messenger Transmitter SDMT C SDMT S Cobham Surveillance GMS Products 1916 Palomar Oaks Way Ste 100 Carlsbad CA 92008 100 M0065X2D T 760 496 0055 05 29 09 F 760 496 0057 CCC wwwcobnmcomgms Table of Contents LO ACRONYMS cars u u Y 4 20 INTRODUCTION LL L u uama 9 5 PA Key System 5 30 THEORY OF OPERATION 5 4 0 HARDWARE OVERVIEW 6 AN SDMT TEE 6 AJ 6 RF QUIEDUE 6 rcr 7 4 122 Frequency elect SWICIIBE dr HP elsi RU 8 PE UE c Tr E 9 AZT SDMI S Con 6ct0lSuu ap atari edo oni eeu AEN OOS 9 DUE 9 421 2 TOS saa maqausuaa wwawaqawanawaqawqunaaquqqha Qua 10 4 2 1 3 SDI ASI BNC Input Connector annassa 10 42 22 Frequency Select SWIECIIBS M GN RENE 10 43 Inline Camera Unit 10 4 3 1 SDMT Inline Camera Mount Connecctors a naa 10 43 11 RF OUTPUT 10 43 12 UO E E E N A 11 a RS Video EA AEA 11 AD ASA Power ORO EE WW ANARAN t IH 12 433 1 5 12 4 3 1 6 SDI ASTI put optio al acis cire UE trt HUE Roe eS 12 50 SOFTWARE OVERVIEW egenis ehc
9. am Standard per ISO IEC 13818 1 Packet Size 188 byte Bit Rate Automatically set from active service settings ASI Input optional Allows MPEG2 transport stream to be inserted into the SDMT A and SDMT S units through the BNC connector 7 4 RS 232 Interfaces RCU USB Control Port 3 wire interface Tx Rx Gnd USB 1 0 RCU A remote portable control unit is also available In addition a Data RS232 channel is available dedicated for low rate data to be transmitted along with the audio and video 75 COFDM RF Output Output Frequency 0 36 to 6 GHz In Bands 100 0065 20 24 of 29 www cobham com gms Frequency step size is 500 KHz for all bands except S2 1999 2500MHz which is 250 KHz Bandwidth Selectable 6 7 or 8 MHz Output Power Up to100mW programmable 200mW on some models 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 7 6 Modulation Modulation Type COFDM w OPSK 16 QAM 64 OAM available with SDMT S and SDMT A units when ASI input is selected FEC 1 2 2 3 3 4 7 8 not all available SDMT configuration type dependent Guard Intervals 1 32 1 16 1 8 1 4 not all available SDMT configuration type dependent Spurious 50dBc Number of COFDM Carriers 2k COFDM MER gt 45dB Standard DVB T compliant 7 7 Power SDMT Frequency 0 36 to 6GHz In Bands DC Input Voltage Range 9 to 15 VDC Po
10. am com gms e Local power is provided by applying 12 Vdc 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 500 mA 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 ensure the remote power if the receivers have this capability is turned off Power Switch for local Dni BNC connector IF frequency DB 9 connector for local RF N type connector Figure 13 BDC Connectors Table 4 DB 9 Connector Pin Out for the D C Pin Signal Notes 1 412Vdc 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 100 M0065X2D 27 of 29 www cobham com gms 9 0 Cable Losses 9 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 2 dB per 100 feet at 50 MHz and 8 cB per 100 feet at 900 MHz The intermediate frequency IF in this system can fall between 49 MHz to 850 MHz An inline
11. amplifier matching the cable losses should be considered if losses exceed 6dB 100 0065 20 28 of 29 www cobham com gms Appendix A Cable SDMT External Breakout NOTES 1 REFERENCE BOM 780 C0224X2 FOR REFERENCE DESIGNATIONS SHOWN AS ON DRAWING AND PART DESCRIPTIONS FINAL CABLE ASSEMBLY WITH PART NUMBER 780 0224 2 USING BEST COMMERCIAL METHOD CONNECTOR WITH REFERENCE DESIGNATOR AND DESCRIPTION AS SHOWN USING BEST COMMERCIAL METHOD LABEL TO BE WITHIN 3 0 OF CONNECTOR 4 REFERENCE MANUFACTURING INSTRUCTION 100 10112 ANTHIS CABLE IS SET UP FOR BALANCED AUDIO ONLY REVISIONS ECO REV DESCRIPTION DATE APPROVED 0355 1 X1 0355 3 INITIAL RELEASE Correct polarity marks of USB pins17 amp 18 01 19 04 SLP 11 9 05 TG l 1 L DATA TX RED RED 2 p3 5 WHT 3 2 L DATA RX WHT 3 8 DATA A 3 GND BLK 9 4 N C ac W5 5 HNC 6 NIC 7 L CVBS Y 2 P1 CVBS Y GND 9 IPr 2 10 GND eee 12 GND P7 Pb A 13 GND BLK 14 11 15VDC RED 15 L N C s 16 USB RESET RED 17 USB DATA WHT J1 DC 18 USB DATA GRN RED 2 POWER 19 t USB GND BLK USB ia 20 P100 22 L 23 N C 24 25 NIC 26 N C 27 NIC 28
12. assword protected FAGMS_SDMT_A Special Setup EBR RF Output Att Step 10 1dB per step gt 0 10dB b COFDM Spectrum Inversion Normal Sleep Mode No Frequency Switch Enabled Video Profile Y GOP Length 12 E Update Exit Store All Setup Pages Figure 8 Others Menu Screen 100 0065 20 19 29 www cobham com gms E GMS_SDMT_C P N 630 SW0055X4E File Configuration Help UNIT RF Power is OFF 14 chars GRAS Unit Number V 050001 RF Freq MHz lt 2200 Input Mode Video Input Video Locked COFDM zl status 8MHz Audio Enable Analog Sd CVBS_NTSC Y Carrier Mode lt l Modulation Mode COFDM Bandwidth COFDM Mode lt lt lt lt QPSK Audio Mute 1 32 Audio Level Modulation FEC 1 2 Audio Gain Channel Rate Mbps Reset Tx Store All Setup Pages Enable All Disable All Query Update CLR Modu Guard Interval lt lt 4 lt lt lt l Figure 8A RF Power Off 5 3 3 3 Help This pull down menu contains information about the SDMT firmware and the SDMT Configurator software This information is outlined below gt Channel Rate Guide This selection pulls up a table which displays the relationship between the Modulation mode Modulation Guard Interval and FEC mode in which the channel rate Mbps is derived Table values will change depending
13. ck 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 100 0065 20 14 of 29 www cobham com gms e 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 e 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 perfor
14. e SDMT box in the Device Selector region Once the SDMT box is selected the screen shown in Figure 5 is displayed The SDMT Configurator program contains function buttons and all the configurable settings available on a SDMT The following sections explain in detail the various options E Ix Configurator d MDTB SDMT AMDTV Resereed Reserved Reserved Reserved Reverved Figure 4 SDMT Configurator Main Screen 100 0065 20 13 of 29 www cobham com gms 5 3 1 E GMS SDMT A P N 630 SW0055X3 File Configuration Help Unit UNIT NAME TBD 14 chars Unit Number M 00001 RF Freq MHz 2250 Input Mode v Analog A V Modulation Mode COFDM Video Input NTSC w Ped COFDM Bandwidth 7 gz v dea Locked L COFDM Mode 16 Audio Enable V 0N Modu Guard Interval 1 4 Audio Mute 4 Unmute Modulation FEC 2 Audio Level 4 Channel Rate Mbps Audio Gain 50 Reset Tx Store All Setup Pages Enable al Disable Query Update CLR Figure 5 SDMT Configurator Main Screen Function Buttons Reset Tx Button Clicking on this button re boots the transmitter to an initial known state Note that it takes 30 seconds to fully initialize the transmitter Store All Setup Pages Button Clicking on this button will store all setup pages even if they are not shown Enable All Button Clicking on this button enables all the che
15. e Rari er eu Lu ru i E A GRON 21 EM ERAT rem T Um 21 Figure 12 Basic SDML S etuD uu uu a inei emo diei id iip De rds c d a oe 23 Figure 13 BDC COTPIFIBEDOIS issenensis iai ai 27 Appendix Appendix A Cable SDMT External Breakout e eeesstteennntttttnnnttttttnnettttttnnn 20 100 M0065X2D 3 of 29 www cobham com gms 1 0 Acronyms This section lists and describes the various acronyms used in this document Name 16 QAM 64 QAM A V AES ABS ASI COFDM CVBS Y C D C DDR DVB T FEC GUI I O Kbaud 100 M0065X2D Meaning 16 state Quadrature Amplitude Modulation 64 state Quadrature Amplitude Modulation Audio Video Advanced Encryption System 32 bit Messenger Basic Scrambling 8 bit Asynchronous Serial Interface Coded Orthogonal Frequency Division Multiplexing Composite video Luminance with S video Chroma video Down Converter Digital Diversity Receiver Digital Video Broadcasting Terrestrial Forward Error Correction Graphical User Interface Input Output Kilobaud per second Kilobits per second Megabits per second Messenger Digital Link Messenger Digital Receiver Messenger Digital Transmitter Modulation Error Rate Moving Picture Experts Group Messenger Smart Receiver National Television System Committee Phase Alternation Line Quadrature Phase Shift Keying Radio Frequency Receiver Serial Digital Interface Standard Definition Messenger Link Standard Definition Messenger Transm
16. ed 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 e Not applicable for embedded audio applications R W 5 3 3 Pull Down Menu Definitions There are several different pull down menus that are included in the SDMT Configurator program Each of these pull down menus contains further user configurable options or commands The following sections describe these menus in detail 5 3 3 1 File This pull down menu offers to exit the SDMT Configurator program Alternatively the X box in the upper right hand corner of the window can be used to exit the program The Store All Setup Pages button on the main menu will save all parameters 5 3 32 Configuration This pull down menu contains several different configuration options These are outlined below Special Setup Scrambling Mode Option this menu not available if option is not purchased This pull down menu displays the following see Figure 6A amp 6B OFF Scrambling Encryption turned off disabled 100 M0065X2D 16 of 29 www cobham com gms AES Never Store the key in the TX Scrambling is turned on Enabled When scrambling is turned on a key code a series of 32 Hex characters must be entered Entering the key code is discussed in the following sec
17. f the transmitter is not in this range then a down converter is used to convert the frequency to this range The frequency from 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 SDMT and converts it to the IF frequency MDRs need to know the LO local oscillator of the down converter and is factory programmed with this information MSRs also need the LO information but is not factory programmed with this information The receiver 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 or MSR the IF is taken care of automatically For example if the transmitter frequency SDMT is set for 2000 MHz then the MDR can be set for 2000 MHz 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 commercial digital receiver 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 RF transmitter frequency LO local oscillator IF frequency For example it the transmitter is se
18. following R W values 1 32 1 16 1 8 or 1 4 not all values available to SDMT C and SDMT S units configuration type dependent Modulation Modulation FEC Forward Error Correction rate FEC R W Desired modulation FEC rate is selected from the following values 75 2 3 3 5 6 7 8 not all values available to SDMT C and SDMT S units 100 M0065X2D 15 of 29 www cobham com gms Field R W Description configuration type dependent Channel Rate Channel rate is displayed based on parameters Mbps R selected such as COFDM mode FEC and Guard Interval Channel rate is limited to 15Mbps when Analog Video input or SDI input is selected Input Mode Choice between Analog video SDMT C S units R W SDI serial digital interface SDMT S units or ASI asynchronous digital interface SDMT S and SDMT A units Video Input 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 Analog video lock status This read only field Status indicates that the SDMT C and SDMT S has line R locked onto the analog video input signal not applicable when the Input Mode is set to either SDI or ASI Audio Enable Analog audio encoder enable Desired mode of R W operation of the audio encoder is select
19. gurations of the SDMT can be mounted in an inline professional camera unit this is an optional enclosure for mounting the SDMT for professional camera applications The hardware for each configuration is Shown below 41 SDMT C RF OUT SMA Connector Frequency Select Switches DB 44 Connector I O and Power Figure 1 SDMT C Connectors 4 1 1 SDMT C Connectors 4 1 1 1 RF Output The SDMT uses a female SMA bulkhead connector for its RF Output port 100 M0065X2D 6 of 29 www cobham com gms 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 4 1 1 2 The I O connector is male high density DB 44 It is used to provide the interface for external power audio analog video USB and RS 232 signals The SDMT has a separate RS232 channel labeled Control on the external breakout cable for control and monitoring the unit GMS SDMT 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 I O connector is shown in Table 1 NOTE An additional RS232 channel labeled USER DATA is currently provided with the external breakout cable The USER Data RS232 channel is dedicated for low rate data to be transmitted along with the audio and video The USB connector is an alternate method of interfacing to the
20. ications Video MPEG 2 and Audio 1 layer ID The MPEG 2 supports 4 2 0 Chroma sampling MP ML and SP ML profiles and maintains the original signal s video fidelity The audio and video program element streams are multiplexed with basic service data to indicate the service name into a DVB compliant Transport Stream TS 100 M0065X2D 5 of 29 www cobham com gms The TS stream is then sent through a DVB T compliant FEC encoder and COFDM modulator This is output from the FPGA based modulator core as digital I O signals that are converted to Analog I O signals and applied to an I O Modulator The LO that provides the carrier to this I O modulator comes from a low phase noise programmable synthesizer The modulated RF output of the I O modulator IC is sent through amplifier chain and ultimately output to the outside world Programmable attenuators in the RF processing chain provide signal leveling The transmitter is microprocessor controlled Normally the transmitter is controlled either through an RS 232 or USB interface via either GMS MS Windows control SW or a simple command line interface Local Frequency control is also available via rotary switches on the side of the housing 4 0 Hardware Overview There are two basic transmitter configurations for the SDMT 1 The SDMT C which accepts Composite S Video and Component Video 2 The SDMT S which accepts Composite S Video Component Video SDI and ASI inputs In addition all two confi
21. ine camera mount unit Many of the control functions which are normally handled through the software interface and a PC can now be accessed directly with the front control panel and displayed on the LCD such as changing frequencies checking video lock status among many others SDI ASI Input optional A BNC connector is provided for Serial Digital Interface or Asynchronous Digital Interface input data streams This input is only applicable to the SDMT S unit 5 0 Software Overview Configuration control and monitoring of the SDMT unit is accomplished by using GMS optional sold separately MS Windows based SDMT Configurator software program This Graphical User Interface GUI program provides the end user with a straightforward way to interface with the SDMT During normal operation once a SDMT link is established the SDMT Configurator GUI does not need to be active and can be disconnected from the SDMT 5 1 System Requirements The SDMT Configurator program has been developed and tested on Windows 2000 Windows XP and Windows NT Although the SDMT 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 5 2 Installation The following instructions outline the installation process for the SDMT Configurator program 1 2 3 100 M0065X2D Insert provided CD
22. itter Signal to Noise Ratio Total Harmonic Distortion Transmitter Volts Direct Current 4 of 29 www cobham com gms 2 0 Introduction GMS Standard Definition Messenger Transmitter SDMT C is one of the smallest and lowest power consumption DVD T Digital Video Broadcasting Terrestrial compliant COFDM Coded Orthogonal Frequency Division Multiplexed transmitter available There are three SDMT models the SDMT C supports standard analog video and audio signals the SDMT S which adds an SDI interface and the SDMT A The SMDT A supports ASI Transport Stream inputs only Note that the MPEG Encoder is removed on this model These transmitters may be supplied as standalone products or may be configured in an optional Camera Box that is compatible with most professional cameras Additionally GMS offers a wide variety of companion products required to form a complete link A Standard Definition Messenger Link SDML is formed when one of the SDMT models is combined with one of GMS Messenger Digital Receivers one or two external Down Converters antennas and a SD MPEG 2 decoder The SDML uses 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 SDML provides a robust wireless link that is effective against the multi path interference experienced by analog systems and provides crisp clear pictures in the
23. m 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 5 3 2 Field Definitions There are several different fields that can be configured by the SDMT 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 SDMT 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 RF output frequency Desired frequency is entered MHz R W in MHz i e 1 296GHz would be entered as 1296 Default frequency step size is 500KHz For S2 band it s 250KHz Modulation Modulation mode Desired modulation mode is Mode R W selected from the following values COFDM default Off shuts off modulation or CAL ON puts unit in calibration mode COFDM R W COFDM transmit bandwidth Desired bandwidth is Bandwidth selected from the following values 6 7 or 8 MHz COFDM Mode COFDM modulation type Desired COFDM R W modulation type is selected from the following values QPSK 160AM or 640AM only in ASI mode Mod Guard Modulation guard interval size Desired modulation Interval guard interval size is selected from the
24. most difficult of terrains Additionally the SDMT DDR Standard Definition Messenger Transmitter and Digital Diversity Receiver combination in SP ML mode can provide an end to end latency down to approx 198ms 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 surveillance and law enforcement where personnel are reacting to real time events This manual provides information on how to operate each of the SDMT models as well as pertinent technical information related to the overall system Also refer to model identifier on line document 100 MNI0034 at GMS website www cobham com gms for available frequency and power configurations along with available options 21 Key System Features Component S Video amp Composite with Optional SDI ASI or ASI Only Interfaces Built in 4 2 0 MPEG 2 Video Encoder and MPEG 1 Layer II Audio Encoder Coded Orthogonal Frequency Division Multiplexed COFDM Modulation Output Frequency 0 36 to 6 GHz In Bands Low Power Consumption Local and Remote Control Interfaces Rugged and Compact Portable Design 3 0 Theory of Operation The SDMT accepts Composite S Video Component video SDI ASI optional as well as up to two audio channels Mic or line level The video and audio are compressed ASI data streams are passed through bypassing the MPEG encoder according to MPEG specif
25. nsmitter 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 42 SDMT S RF OUT SMA Connector SDI ASI Input BNC Connector Frequency DB 44 Connector Select Switches I O and Power Figure 2 SDMT S Connectors 100 M0065X2D 9 of 29 x www cobhamcom gms 421 SDMT S Connectors 4211 RF Output The RF Output connector is the same as the SDMT C Refer to section 5 1 1 1 above for the description 42 12 The I O connector for the SDMT S is the same as for the SDMT C Refer to section 5 1 1 2 and Table 1 above for the description and pin functions For the SDMT A the I O connector is limited to only power ground USB connections and RS232 functions Analog video input functions are not provided 4 2 1 3 SDI ASI BNC Input Connector The BNC connector is provided for inserting SDI Serial Data Interface and ASI Asynchronous Serial Interface data The SDMT S can accept either SDI or ASI The selection for which input data stream is accepted is made through the GMS PC Windows Control software See section 6 4 2 2 Frequency Select Switches The frequency select switches are the same as the SDMT C See section 5 1 2 above for the operational description 43 Inline Camera Unit optional T P 1 Balance DB 15 ami P Wd i audio Connector lt d j A1 amp A2 B
26. on which COFDM Bandwidth is selected See figure 9 Also keep in mind that all values may not be available they are SDMT configuration type dependant gt FW version This selection pulls up a window that displays the SDMT Software Version date the FPGA Version and Serial Number See Figure 10 gt About This selection pulls up a window that displays the Version Number of the GMS SDMT Configurator program See Figure 11 100 0065 20 20 of 29 www cobham com gms Modulation Mode 4 976 6 635 7 464 8 294 9 67 8 708 11 7093 11 0588 9 952 14 745 13 270 17 564 16 5882 14 929 20 1069 19 5155 18 4313 16 5882 78 31 6684 30 737 29 0294 26 1264 Figure 9 Channel Rate Guide GMS SDMT FW Version Figure 10 FW Version 100 M0065X2D 21 of 29 www cobham com gms E About GMS_SDMT_A Configuration E 9 Global Microwave Systems Inc E PIN 530 8 w0055X3 GMS MDTB SDMT Configurator August 7 2006 www gmsinc com Figure 11 About 6 0 Getting Started The standard SDMT kit includes the following items SDMT unit example GMS p n SDMTCCBAONXXX gt SDMT full breakout cable GMS p n 780 C0224 Power A V Data Control interfaces NOTE Based on customer application GMS may deliver additional cables and antennas Contact GMS for further information The SDMT is pre configured by GMS prior to shipment based on customer requirements thus is ready to work
27. right out of the box 6 1 Initial Checkout Prior to installing a SDMT unit into the desired target environment an initial checkout should be performed to ensure proper operation of the unit The initial checkout consists of configuring a basic SDML Standard Definition Messenger Link Figure 9 shows a basic interconnection configuration to establish a wireless SDML NOTE Receivers down converters D C units and their associated hardware are sold separately As mentioned in section 4 0 the SDMT may be shipped as a stand alone unit or mounted in an Inline Camera Mount box SDMT stand alone units require the use of GMS breakout cable to provide power and the necessary interfacing to communicate to the transmitter The Inline Camera Mount boxes require a 12 battery and most of the necessary communications can be done through the LCD front panel The steps necessary to set up the configuration shown in Figure 12 are shown below the differences between the Inline Camera Mount box and stand alone unit are noted where applicable 100 M0065X2D 22 of 29 www cobham com gms ee Power Source Power Supply Video Source Monitor Figure 12 Basic SDML Setup 1 Install omni directional antennas onto the SDMT RF output port and Down Converter D C RF input port 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 2 At
28. rovided if RS232 port is not available Table 2 I O DB 15 Connector Pin Out Pin Signal Notes 1 12Vdc 2 RS232 Rx CTRL Relative to SDMT i e control data is input on this pin 3 RS232 Tx CTRL Relative to SDMT i e control data is output on this pin 4 Not connected 5 RS232 GND Common ground for both RS232 Data and Control lines 6 DL2C D 7 2 8 USB Reset 5V 9 USB Data 10 USB Data 11 USB GND 12 Not connected 13 RS232 Tx DATA 14 RS232 Rx DATA 15 RS232 GND 4313 Video Input 100 0065 20 The SDMT in line camera enclosure uses female BNC connectors for video input Component Composite or S Video input is accepted see section 6 for setting video input type J3 BNC connector marked is a dual use input connector a Composite Video or b Luminance when used with Component video J2 BNC connector marked is dual use input connector a Chroma when used with S Video or b Pr 11 of 29 www cobham com gms 4 3 1 4 4 3 1 5 4 3 1 6 the red component minus the luminance information used with Component Video J8 BNC connector marked Pb is the blue component minus the luminance information used with Component Video These video inputs are applicable to the SDMT C and SDMT S units Power Switch An LED indicator rocker switch is provided for controlling power to the unit LCD Display An optional LCD display with a front control panel is available for the inl
29. seht 12 s System Requirements Rm 12 SS MEE T 12 5 33 SDMT Configurator Functions annassa 12 53 Funeti m tU 14 5 32 Field 15 5 3 3 Pull Down Menu 16 Pert enr 16 5 3 3 2 Configuration asta united 16 5333 20 6 0 GETTINGSTARTED a 22 6 22 PUES mU Ww Vus cR aieeaa E EE EQ 24 1 Encoding ens de ha mnm d utt 24 72 MN 24 73 eei in uite ERE ARD ud urban 24 74 RS 232 Interfaces RCU USB 24 L9 COFDM RF QU Oui asec a mu WHO 24 BOE RN e 25 25 7 8 Physical Dimensions without mating connectors a 25 5B Environmental au u n ana Guatusa Gusan 25 7 10 SDMT Special Features u u n ORO Vt LO cU Gb Vd QU eee 25 100 M0065X2D 2 of 29 www cobham com gms 80 THE D C DOWN CONVERTER IF FREQUENCIES EXPLAINED 26 8 1 IF PRE GUGM CIC Rm 26 8 2 Local ANd Remote
30. t down enabling a saving in current approx 40 when transmitter is not active The OFF state of the unit is displayed on 18 of 29 www cobham com gms the main window see figure 8A To have the unit in the desired RF Power Mode on Power up it is necessary to store settings in the Others window If the settings are stored in the main page the state of the RF Power Mode will not be saved Frequency switch choices offered are enabled or disabled These are the four frequency select switches discussed under section 5 1 2 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 SDMT control software Enabling them allows the frequency to be changed when the switches are moved Factory default enables the switches Keep in mind that you must click on the Store All Setup Pages button for any new selection to take place Video Profile Pull down box offers a choice between the SP ML profile default profile and the MP ML profile GOP Length Group of pictures size 1 19 can be adjusted by selecting various values from the pull down boxes gt Ctrl Port Baud Rate The control port baud rate menu allows different baud rates to be selected when attached to the PC RS232 port 115200 baud rate is the default value Some computers may need the baud rate adjusted for optimal communications gt Factory Setup reserved for factory use and is p
31. t for 2000 MHz and the LO of the down converter is 2800 MHz then the IF frequency is 800 MHz 2000 2800MHz 800 The receiver will need to be set to 800 MHz to receive the transmitter frequency of 2000 MHz 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 a negative LO may indicate the receiver wants the signal to be inverted See section 6 3 3 2 for inverting the signal Local and Remote Power Customers may have the option of using remote or local power to power up a down converter depending on the receiver used GMS MDRs Messenger Digital Receiver and MSRs Messenger Smart Receiver can provide DC 12 volts to power the D C remotely through the RF cables Refer to GMS MDRs or MSRs operating instructions for turning on the DC power for the D C when using remote power 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 12 Vdc but can operate down to 10 Vdc 100 0065 20 26 of 29 www cobh
32. tach the breakout cable DB 44 end to the SDMT unit if unit is mounted in an Inline Camera Mount Box this step does not apply 3 Attach a RF cable from the D C IF output port to RF in port of the receiver 4 Attach a composite video source to SDMT BNC video input cable marked CVBS Y that is located on the breakout cable S video and Component video input are also available If unit is mounted in an Inline Camera Mount Box then attach video to appropriate BNC video input connector 5 Attach a video cable from one of the BNC video output ports on the receiver to a video monitor 6 To prepare to power the SDMT unit attach the red and black wires from the breakout cable to 12V terminal and ground of power supply respectively if unit is mounted in an Inline Camera Mount box then attach 12 Volt battery NOTE The power supply for the transmitter needs to be able to provide at least 1 Amp of current at a nominal 12VDC input If using a commercial DVB T receiver follow the manufacturers s instructions for powering the unit 7 Turn on video source and video monitor equipment 8 Apply power to the SDMT and the receiver unit Inline Camera Mount boxes have power switches which must be turned on Also ensure the down converter is powered 12 Vdc to pin 1 GND to pin 3 of the DB 9 pin connector located on the bottom side of the D C If the down converter is installed in a camera mount box it will have a power switch on the side of the
33. tion Scrambling Key In this mode the key code is not stored in the transmitters memory When power is removed the key code will be lost and must be re entered when power is re applied The same key code must be entered in the DDPC of the MSR See DDPC manual 100 M0070 AES Store the key in the Tx Scrambling is turned on Enabled In this mode the key is stored in the transmitters memory When power is removed the key code will not be lost Query Clicking this button performs a read operation which will read back the current scrambling mode configuration Apply Clicking this button will perform a write operation of the selected mode Exit Exit the scrambling mode 5 Transmitter Scrambling Setup Serenbing Mode Query Apply Exit Status Figure 6A Scrambling Mode Setup 5 Transmitter Scrambling Setup Scrambling OFF OFF AES NEVER Store the key in the Tx AES Store the key in the Tx Status 100 M0065X2D Figure 6B Scrambling Mode Setup 17 of 29 www cobham com gms 100 M0065X2D o Scrambling Key Option This menu not available if option not purchased This menu displays the following see Figure 7 Enter Scrambling Key from Keyboard The 32 character key code can be manually entered from the keyboard The characters must be Hex numbers When the numbers have been typed use the Apply button to enter the code
34. unit Ensure the switch is turned to the On position 9 After approximately 10 seconds the link should be established and video provided by the source should be displayed on the monitor 100 M0065X2D 23 of 29 www cobham com gms The initial checkout described above is simply to check the basic video operation of the SDMT unit For further details on monitoring and controlling the SDMT using GMS optional MS Windows based SDMT Configurator software program see Section 6 0 7 0 Specifications The following sections outline the overall specifications for the SDMT unit 7 1 Video Encoding Interfaces SDI optional Component Composite or S Video Input Standards NTSC or PAL Compression Standard MPEG 2 per ISO IEC 13818 2 Profiles MP ML SP ML Video Bit Rate 3 7Mbps to 15Mbps MP ML Chrominance Profile 4 2 0 Line Standard 525 or 625 Horizontal Resolution 704 pixels Vertical Resolution 576 625 line and 480 525 line System Latency end to end delay 198mS with SDMT DDR combination in SP ML mode 7 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 256Kbit s ch Sampling Frequency 32kHz 44 1kHz or 48kHz THD 0 176 maximum Response 20Hz to 12kHz 0 25dB Crosstalk gt 55dB minimum S N gt 60dB RMS 7 3 Transport Stre
35. wer Consumption 8 5 Watts to 10 8watts SDMT configuration type dependent 7 8 Physical Dimensions without mating connectors SDMT Frequency 0 36 to 6GHz In Bands SDMT C unit Size 3 25 in W x 4 5 in D x 1 00 in H 8 26 cm x 11 43cm x 2 54cm Weight 10 69 oz 303 1 grams SDMT S A units 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 379 9grams 7 9 Environmental Operational Temperature 10 to 70 C Humidity Up to 100 non condensing 7 10 SDMT Special Features Video Only Mode In applications where audio is not required the audio channels can automatically be switched off Bit rate is automatically switched over to the video channel in this situation Monochrome Video Mode custom option consult factory Surveillance applications often do not require chrominance data in the video SDMT has been provided with a luminance monochrome only mode When in this mode bit rate is saved giving sharper monochrome pictures 100 0065 20 25 of 29 www cobham com gms Security Option The SDMT can optionally be provided with an Advanced Encryption System AES for protecting the signal in sensitive applications 8 0 The D C Down Converter IF frequencies explained 8 1 8 2 IF Frequencies GMS MDRs Messenger Digital Receivers and MSRs Messenger Smart Receivers are capable of receiving direct frequencies in the range of approximately 49 MHz to 861 MHz I
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