User`s Manual DIVERSITY DVB
Contents
1. AV in out Source function key B Blue Function defined by screen R Red Function defined by screen G Green Function defined by screen Volume dn Y Yellow Function defined by screen Volume up 4 Hardware Overview The following shows the front and rear views of the DBV T Receiver Each item will be described in this section See Figure 2 100 M0062X2 www cobham com gms 6 of 17 Video Out REAR PANEL Audio In Video In STEREO NOT USED AUDIO VIDEO RF IF INPUTS Audio Out In In FRONT PANEL Power On Data In DC Power Figure 2 100 M0062X2 7 of 17 www cobham com gms 4 1 Composite Video Out There are three composite video connections V1 V2 V3 This output is normally connected to a video monitor 4 2 Stereo Out There is one stereo output Right Left Two RCA female connectors are used 4 3 Audio In There are two channels of stereo audio in Right Left This allows connection to a DVD player or navigation device Four RCA female connectors are used 4 4 Video In There are two inputs for Video In This allows a connection to a DVD player or navigation device Two RCA female connectors are used 4 5 RF IF Inputs Either the antennas are connected to these inputs RF or when used in an MDL system the output of a BDC IF is connected if the frequency is greater than 861MHz Two F female style connectors are used 4 6 Data In This connection is used to allow software updates to be d2. when received from the manufacturer In this case when power is applied to the unit the receiver will do an auto search for channels If channel data has been saved previously the receiver will search for the saved channels See section 5 for saving channel data Note The DDR can be ordered with NTSC or PAL video standard The user must specify the video standard when ordering The GMS part number for the NTSC version is 565 043A The GMS part number for the PAL version is 565 050 This manual provides information on how to operate the DDR as well as pertinent technical information related to the overall system 100 M0062X2 4 of 17 www cobham com gms 3 Remote Control The remote control allows the user to remotely setup and program the Receiver The following diagram Figure 1 8 Table 1 shows the buttons and the definitions Figure 1 100 M0062X2 5 of 17 www cobham com gms Power Power on off Exit Exit to previous screen Menu Enter main menu FAV Channel Fav channel OK key enter 0 9 Numeric keys for data entry FAV up arrow Cursor up Main menu FAV down arrow Channel up arrow Cursor down Main menu Cursor right Main menu Channel down arrow Cursor left Main menu Display Display channel status on screen Mute Audio mute unmute Recall Return to last channel PI Channel information MTS Audio select Stereo Mono Left Right
3. with the transmitter frequency MDT B and converts it to the IF frequency The DVB T receiver must be programmed with the IF frequency directly The user can 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 For GMS BDCs refer to the table on the GMS web site http www cobham com gms under Products RF Modules Block Down Converter The math involved is as follows Transmitter frequency LO IF frequency For example if the transmitter is set for 5800MHz and the LO of the down converter is 5100MHz then the IF frequency is 700MHz 5800 5100 700 The receiver will need to be set to 700MHz 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 Transmitter frequency LO that negative or positive answers are possible For example 5000 5100 100 The negative answer may indicate the receiver wants the signal to be inverted See section 6 3 3 2 of the MDT B user manual 100 M0056 for inverting the signal BDC Power is provided by applying 12Vdc to pin 1 GND to pin 3 of the DB 9 connector located on the bottom of the BDC The 12 Volt power supply must be able to source at least 500mA The power switch located on the side of the BDC enables the user to control
4. DC is required if the transmitter is not in this range If the bandwidth of the DDR is set to 8 MHz then frequencies in the range 178 MHz to 861 MHz in 8 MHz increments i e 178 MHz 186 MHz 194 MHz etc are valid The same concept applies to 6 and 7 MHz bandwidth settings of the DDR When the auto search is complete the detected frequencies channels and pertinent data will be saved in the program data file This implies that a MDT B transmitter must be up and running before power is applied to the receiver If the receiver detects the transmitter the unit will output to the video display The following is a visual of the First Time Use start up screens pel LU YY Specific Search HYDD dni LA Alto Search Figure 5 7 Channel Search There are three different methods used to search for incoming RF IF signals They are Auto scan AIl freguencies are scanned from 178 MHz to 858 MHz at 8 MHz bandwidth BW initially The scanning will be continued using 7 then 6 MHz BW Range search Beginning and end freguencies are specified for range of Channels to do a search Specific search Only one specific freguency is searched The freguency resolution is 0 5 MHz increments 100 M0062X2 11 of 17 www cobham com gms Auto Scan 1 Press the Menu button on the remote control The screen will be displayed as shown in Figure 6 Use the Up Down arrow key to highlight the Search channel Press t
5. Li Figure 11 9 System Setup The system setup allows the user to configure the Aspect mode TV aspect System date amp time and System language A feature Default setting is also available which allows the user to reset the DDR to the original default settings From the main menu Figure 6 select System setup The screen as shown in Figure 12 will be displayed Us the up down arrow keys to highlight desired feature to be changed Press the OK button Use the right left arrow keys to select the desired parameter Press the OK key enter To change back to the default factory settings use the up down arrow key to highlight the Default Setting field Press the OK button The user will be prompted to select Yes or No Enter Yes to restore default values Enter No to decline If Yes is selected all of the user channels will be deleted yo WN Y Default Setting J Figure 12 100 M0062X2 17 of 17 www cobham com gms
6. User s Manual The most important thing we build is trust DIVERSITY DVB T RECEIVER DDR Cobham Surveillance GMS Products 1916 Palomar Oaks Way Ste 100 Carlsbad CA 92008 100 M0062X2 T 760 496 0055 05 15 09 F 760 496 0057 TW CODAam com gms s lt CSsS TABLE OF CONTENTS AUN 4 9 O 0o Y OY UT Composite Video Ultra Stereo OUt urarena en Na e a Ee ei aa saaa ant ean Audio Mica A a ces e oar peda FD OTDD EON Video 1 Y srr ri A ar nto Power On LED ieri Sn A DC Power 100 M0062X2 00 9o oo Oo Do 00 co 0 o aw 20f17 www cobham com gms 1 Acronyms This section lists and describes the various acronyms used in this document Name 160AM 64 QAM A V AES ABS ASI COFDM CVBS Y C D C DDR FEC GUI I O Kbaud Kbps Mbps MDL MDL B MDR MDR B MDT MDT B MER MPEG NTSC PAL QPSK RF S N THD SDI VDC 100 M0062X2 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 Diversity DVB T Receiver Forward Error Correction Graphical User Interface Input Output Kilobaud per second Kilobits per second Megabits per second Messenger Digital L
7. enter the new frequency bandwidth The entry is stored as a unique user channel To enter additional channels go back to step 2 and repeat the process Each time a user channel is entered the last character in the user field will be incremented by one i e User 1 User 2 User 3 etc Ref Figure 10 Press Exit when done 4 Apply power to the transmitter and enter the desired frequency at the transmitter At the DDR press the Menu button using the remote control Use the Down arrow key to highlight the Specific search Press OK twice The Channel field will be highlighted Use the Up or Down arrow keys to choose the desired user preset frequency BW Press OK to make the selection Press the down arrow until the Yes box is highlighted Press OK After a short delay video will presented to the video monitor The selected frequency along with associated parameters is now stored in the DDRs program guide as a file See the following program guide section Up to 32 different program files channels can be stored in the DDRs program guide When used in an MDL link it is recommended that only one program file be used file 1 When power is applied to the receiver the unit will look at the program guide and do a search for a frequency associated with that file When there is a link to a transmitter the receiver will come up running amp display video on the monitor Having one channel programmed mini
8. he OK button After the OK button is pressed the screen as shown in Figure 7 will be displayed 2 Use the Up Down arrow key to select to highlight Autoscan Press the OK button to select Auto Scanning See Figure 7 3 Press the OK button on the remote control to start scanning The screen will be displayed as shown in Figure 8 after the OK button is pressed I MMI W I sal hy ALY Figure 6 100 M0062X2 12 of 17 www cobham com gms AMBA Ad UAA 800 MA AA dib YY WW LA A Get Figure 7 Figure 8 100 M0062X2 13 of 17 Range Search 1 Press the Menu button on the remote control The screen will be displayed as shown in Figure 6 Use the Up Down arrow key to highlight the Range search Press the OK button After the OK button is pressed the screen as shown in Figure 7 will be displayed 2 Use the Up Down arrow key to highlight Range search Press the OK button to select Range search See Figure 7 After the OK button is pressed the screen as in Figure 9 will be displayed 3 The desired range of channels or frequencies to search is selected from this screen Figure 9 Enter the beginning channel or frequency channel from and the end channel or frequency channel to The desired BW bandwidth must be selected also Highlight the Yes field Press the OK button to start the search If No f
9. ield is highlighted then the operator will be prompted to re enter the range of search channels again ML UT HA MQ fem MZ Figure 9 Specific Search 1 Press the Menu button on the remote control The screen will be displayed as shown in Figure 6 Use the Up Down arrow key to highlight the Search Channel Press the OK button After the OK button is pressed the screen as shown in Figure 7 will be displayed 2 Use the Up Down arrow key to highlight Specific search Press the 100 M0062X2 14 of 17 www cobham com gms OK button to select Specific search See Figure 7 After the OK button is pressed the screen as in Figure 10 will be displayed 3 Use the down arrow key to highlight the Frequency field Press the OK button Use the keypad to enter the desired IF frequency see Figure 10 Use the down arrow key to highlight the yes or No field If Yes is selected the frequency will be entered after pressing the OK button If no is selected the frequency can be re entered after the after pressing the OK button Use the down arrow key to highlight the BW field Press OK Use the left or right arrow to select the desired bandwidth Press OK to enter Use the down arrow key to highlight the Yes or No field Press No to exit back to the Search channel menu Press Yes to
10. ink Messenger Digital Link Broadcast Version Messenger Digital Receiver Messenger Digital Receiver Broadcast Version Messenger Digital Transmitter Messenger Digital Transmitter Broadcast Version Modulation Error Rate Moving Picture Experts Group National Television System Committee Phase Alternation Line Quadrature Phase Shift Keying Radio Frequency Receiver Signal to Noise Ratio Total Harmonic Distortion Serial Digital Interface Transmitter Volts Direct Current 3 of 17 www cobham com gms 2 Introduction The GMS Diversity DVB T Receiver DDR is a commercial VHF UHF terrestrial receiver designed for the European market which can be used in a GMS Messenger Digital Link MDL This MDL link includes a Messenger Digital Transmitter the DDR and one or two external Down Converters sold separately for frequencies exceeding the direct input of 861 MHz This MDL system utilizes a robust digital modulation system known as Coded Orthogonal Frequency Division Multiplexed COFDM that provides frequency diversity and powerful Forward Error Correction FEC algorithms This MDL provides a robust wireless link that is effective against the multipath interference experienced by analog systems and provides a clear picture in the most difficult of terrains Channel data such as Channel number frequency bandwidth and other pertinent information can be stored in a program data file Normally a receiver has no program data stored
11. mizes confusion 5 If it is desire to change the frequency go back to step 4 100 M0062X2 15 of 17 www cobham com gms A Modify argumerts plazca Frequency 6293 000 BWN MHz Figure 10 8 Program Guide The Program guide displays a list of user files channels which have been previously saved as user channels Up to 32 different files can be stored When used in an MDL link it is recommended that only one file be used When power is applied to the receiver the unit will look at the program guide and do a search for the frequency associated with that file When there is a link to the transmitter the receiver will come up running amp display video on the monitor Having one file programmed minimizes confusion The following shows how to use the Program Guide 1 Press the Menu button on the remote control The screen will be displayed as shown in Figure 11 Figure 11 shows only one file stored in the program guide Unit Name TBD As mentioned earlier up to 32 different files can be stored Use the up down arrow keys to highlight the desired file use the OK button to select the file If one file is stored the file 1 one will be highlighted 2 The Yellow button on the remote control is used to delete a channel The Blue button is used to setup favorite channels 100 M0062X2 16 of 17 www cobham com gms YL LL LL A FNAN AN IT Il iii f i Luna
12. ownloaded into the unit RS232 connection 4 7 Power On LED LED INDICATES THAT POWER IS ON 4 8 IR Sensor THE REMOTE CONTROL UNIT COMMUNICATES TO THE RECEIVER VIA AN IR SENSOR THE IR SENSOR SUPPLIED WITH THE RECEIVER IS ATTACHED TO THIS CONNECTOR THE SENSOR IS PART OF A 6 FOOT CABLE AND CONNECTOR THE SENSOR MUST BE ATTACHED TO ALLOW COMMUNICATION VIA THE REMOTE CONTROL UNIT 4 9 DC Power The 12 Volt power is attached to this connector The current draw is approximately 0 6 Amps The connector is a four pin Molex The receiver is supplied with a mating connector with four wires pre attached The red wire is attached to the plus of the power supply The black and green wire attach to common of the power supply The blue wire is not used and can be removed 5 Use With GMS MDL Link Figure 3 shows a basic configuration to establish a MDL wireless link 100 M0062X2 8 of 17 www cobham com gms OO00 Power Source D C D C IF Power Supply DVB T ih Video Source bl Monitor Figure 3 The DVB T receiver 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
13. the ON OFF positions for local power See Figure 4 100 M0062X2 9 of 17 www cobham com gms 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 BDC Power connections in optional housing Power Switch DOSSO BNC Connector IF out RF in connector DB 9 Connector for local power Figure 4 BDC Connectors 6 First Time Use As part of the system verification GMS will put the receiver thru the First Time Use procedure Therefore you will only need this procedure if you have purchased a receiver independent of a link or system When power is initially applied to the receiver the unit will enter into an auto search mode The auto search function will scan for valid RF signals to detect within a specific frequency range 178 MHz to 861MHz The search will begin at 178MHz and step thru the range 178 861MHz in 8 MHz increments i e 178MHz 186MHz 194MHz 858MHz The search will resume the scan beginning at 178MHz again but in 7 MHz increments this time Finally the search will resume starting at 178 MHz in 6 MHz increments The transmitter must be set to a valid frequency for the DDR to detect If the transmitter operates in the range of 178 MHz to 861 MHz the DDR can receive 100 M0062X2 10 of 17 www cobham com gms RF from the transmitter without the need of a BDC The B
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