SEFRAM 7871 User Manual Download Page 58

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11.10 DVB-C

Display of the measures of:



BERo

error rate before Reed Solomon



PER

error rate after Reed Solomon (error rate packet)



MER

modulation error rate



LKM

Noise margin (Link Margin)

BERo

error rate

‘bits’

Ratio between the number of false bits / number of transmitted bits during the measurement time

PER

error rate

‘packets’

Ratio between the number of false packets / number of transmitted packets during the
measurement time

Recall: Under DVB-C, a packet is made of 204 bites; a packet is "false" if it includes more than 8 wrong
octets (correction by Reed Solomon coding).

TUNER

DEMODULATOR

REED

SOLOMON

DECODING

MPEG

BERo

PER

Summary of Contents for 7871

Page 1: ...copyright laws as un published works They are confidential and proprietary to Dolby laboratories Their reproduction or disclo sure in whole or in part or the production of derivative works there from...

Page 2: ...rement Echo Guard interval 3 0 June 2013 9 1 19 6 5 24 26 Updating satellites Configuration GPS WiFi 4 0 avril 2014 11 11 16 19 5 19 5 1 19 5 3 24 3 2 25 30 1 Measures DVB C2 Echo Guard Interval Saves...

Page 3: ...dvanced appliances To obtain the best performance from this product please read this manual carefully For more information please contact our different services E mail Sales department sales sefram fr...

Page 4: ...he remaining duration of the guarantee if the appliance is still under guarantee If the guarantee duration is less than 90 days the replaced part is guaranteed for 90 days Any replacement part becomes...

Page 5: ...f 12 months from the first use under normal conditions of use We recommend a check after 12 months and max 24 months of use then every 12 months after 24 months For any check of the characteristics th...

Page 6: ...4 2 Loading of the battery 23 4 3 External power supply 24 4 4 Turning the appliance on and off 24 5 Man machine interface 25 5 1 Content of the screen 25 5 2 Changing a name or a value 27 5 2 1 Chang...

Page 7: ...C2 59 11 12 DVB S and DSS 60 11 13 DVB S2 61 11 14 FM RDS 62 11 15 DAB DAB 63 12 Spectrum analyser 64 12 1 Simplified Spectrum 64 12 2 Additional functions for satellite 65 12 3 LTE mode 65 12 4 Fill...

Page 8: ...19 3 Measurement unit 91 19 4 Frequency map 91 19 5 Saves 91 19 5 1 View 92 19 5 2 Save 93 19 5 3 Delete 94 19 6 Adjustment 94 19 6 1 Beep 94 19 6 2 Password 95 19 6 3 Background 95 19 6 4 Active USB...

Page 9: ...lert messages 114 28 2 Error messages 115 29 Maintenance 116 30 Technical specifications 118 30 1 Selection Guide 118 30 2 Common technical specifications 119 30 3 Digital measurements 120 30 4 Divers...

Page 10: ...se Sefram spare parts Do not open the appliance risk of electric shock You should use the F F or BNC F adaptor provided with your measuring instrument Any other adaptor could damage your appliance and...

Page 11: ...Refer to the manual Shows a risk of damage for the material connected to the instrument or to the instrument itself Ground Grounded accessible parts Product for recycling 1 4 Conformity and restrictio...

Page 12: ...sing lines on white or yellow The Measurements TV Spectrum page is divided in four zones TV with current service Spectrum and Measurements Pressing a zone displays this zone full screen or a selection...

Page 13: ...a satellite dish 2 2 1 Checking a terrestrial antenna In this case the Autoset function allows a scan of the channels that the antenna detects Plug the cable of your antenna to the 787X take care to...

Page 14: ...found the appliance makes measurements continuously C N level then BER MER on the detected channels If no channel has been found see the next chapter Eventually press the TV measurement key On this n...

Page 15: ...e cable of your antenna to the 787X take care to use an adequate adaptor Turn your appliance on Press the Measures TV Spectrum key Press the Spectrum zone Access to terrestrial mode if needed Access t...

Page 16: ...evice find automatically all the parameters of the signal Once the search ended the device display TV picture TV name Network Name and Network ID Press the Measures TV Spectrum key You can now display...

Page 17: ...s to the Remote power supply page press To launch the remote power supply en route press then select ON in the page to launch the remote power supply A green check appears in front of what you validat...

Page 18: ...eption quality 50 green smiley Reminder transponder satellite channel To check if the aimed satellite is the right one press the NIT key The appliance searches the MPEG NIT table on one of the 4 trans...

Page 19: ...ange of the satellite when a transponder does not seem to work Some switches or LNB work only with DiSEqC commands In this case position the band OL and the polarization on DiSEqC at the Configuration...

Page 20: ...lation diagram for digital standards the detection and display of Echoes and pre echoes and the display of MER per carrier in DVB T T2 T2Lite and DVB C2 to have a complete analysis of the digital sign...

Page 21: ...witch BNC ASI OUT socket option BNC ASI IN socket option Encrypted TV card drive option RF socket with F F or BNC F adapter RIGHT SIDE VIEW TNC GPS socket option SMA WIFI socket option T l alim light...

Page 22: ...use the belts For carrying properly your instrument we suggest to set the belts as shown on the picture below upside on the left and bottom on the right How to carry your instrument A very convenient...

Page 23: ...tery pack includes a protective item that should not be damaged or removed Protect the pack from the heat while storing Do not damage the protective sheath of the pack Do not store the appliance in a...

Page 24: ...ce works under 15V 4 6 A power supply The power supply block provided is an external power supply too Only use the power supply block provided with the appliance 4 4 Turning the appliance on and off P...

Page 25: ...e screen Home Save LNB DiSEqC and Measures TV Spectrum The Home page allows the navigation through all functions of the appliance You will also find there the LNB DiSEqC and Measures TV Spectrum funct...

Page 26: ...ntion To display a window like this one below you have to press the key Indication of the values Tension and Current of the remote power supply Indication of the state of the battery Page title Site n...

Page 27: ...ide a cursor with your fingers 5 2 Changing a name or a value 5 2 1 Change inside a table You can select a setup in the table In this case you can validate a setup by pressing the line you want to dis...

Page 28: ...he example below In this example the bandwidth changes from 5 to 8 MHz 5 2 3 Change with virtual keyboard If you want to enter a name of a number a window appears with a numeric keypad or a virtual AZ...

Page 29: ...NTIC BIRD 3 in DiSEqC position A ASTRA 1 in DiSEqC position B HOT BIRD in DiSEqC position C The same setup may be used several times in the same measurement list ZDF SatCR slot 0 ZDF SatCR slot 1 ZDF...

Page 30: ...e specific to the waveband of the satellite and have no influence in terrestrial and cable modes Presentation of a measurement list in a spreadsheet A setup is made of a setup name in 8 characters a p...

Page 31: ...channel number are equivalent a valid channel number has priority over a frequency The frequency map parameter associated with the setup allows frontiersmen to keep on using channel numbers Presentat...

Page 32: ...etups and to provide information about the current place You can access it through the key on page Home The displayed lines on this page depend on the selected Frequency band The key before the Mode l...

Page 33: ...The more you select options the longer the research 6 1 Terrestrial mode This mode allows automatic research on the terrestrial frequency band The table allows the selection of Standards Channel width...

Page 34: ...frequency band 6 4 START menu key No matter which mode is selected press the START key when the table is filled to launch the research Pressing Stop will abort the research When the research is done o...

Page 35: ...vailable setups of the library starting from the end of the table The new list is created in the first available list The default name of the new list is AUTOSET New found channels are added one by on...

Page 36: ...rk on measurements Pressing Home then Lists Library gives you access to the Lists function Lists are ranked from 0 to 19 To select the one you want press the following key Lists are displayed Press th...

Page 37: ...me SEFRAM in our example To add a setup to the list select the line A window shows up By pressing the key before Setup you disclose the available setups from the library you cannot create a setup from...

Page 38: ...your list Press the line you want The setup is now in the list You may erase the setup from the list by pressing the check before Erase when the setup is selected You can also erase all setups from th...

Page 39: ...7872 7875 7876 p 39 In a satellite setup you can change the switch the Uncommitted Port and the DCSS by activating any of these keys this change will affect only the setup in this list not in the lib...

Page 40: ...the library To create or change a setup in the library you have to select a line in the table A window pops up You can also erase the setup in the library by pressing the key You can also erase all se...

Page 41: ...e setup To enter the place name you want for the setup To enter the name you want for the setup To enter the frequency you want for the setup To enter the channel you want for the setup To enter the s...

Page 42: ...7876 p 42 Setup Satellite KU L or C Ku L or C corresponds to the selected band To enter the type of polarity you want for the setup high or low vertical or horizontal To enter the symbol rate you wan...

Page 43: ...llites It is provided with circa ten satellites registered 4 transponders are appended to each satellite You can select the satellite by pressing several times Name and position of the satellite To mo...

Page 44: ...m our website Embedded Help will be useful for each work Change the values as you wish After changes you only need to record a file SAT CSV on an USB memory stick and Import inside your instrument see...

Page 45: ...0 and 200 mA See chapter Remote power supply LNB DiSEqC 3 On the Home page go to the Check Sat mode Select the satellite to aim at in the list example ASTRA1 4 Slowly orientate the satellite dish unti...

Page 46: ...pliance searches the MPEG NIT table on one of the 4 transponders and displays the name of the satellite Attention To identify a satellite it must be synchronized on all 4 transponders However some tra...

Page 47: ...titude Azimuth and Polarization values of your satellite dish Parameters Satellite 1 satellite to aim or 1 st satellite in case of multi headed satellite dish Satellite 2 2 nd satellite in case of mul...

Page 48: ...nce The compass measurements are based on previous parameters satellite to align current latitude and longitude Please fill these parameters before using the electronic compass When triggering this ke...

Page 49: ...s your antenna Measured in degrees using what is specified on the stand of the satellite dish Polarization Rotation required for the LNB from a vertical line Measured in degrees To calculate the param...

Page 50: ...Spectrum page The Measures TV Spectrum page is divided in three zones that can each be displayed full screen by pressing it the spectrum the TV or the measurement It also includes a service list zone...

Page 51: ...AutoLock function 11 1 Autolock function This function is design to lock on a digital signal terrestrial cable or satellite You just have to enter the frequency or the channel for terrestrial then pre...

Page 52: ...er for terrestrial and cable mode The symbol rate for the satellite The polarization and the band for the satellite The audio mode for the analogical TV The key in the lower right corner displays unde...

Page 53: ...be between 47 and 77 dB V Example in terrestrial mode The appliance makes different measurements according to the current standard The other possible measurements are Average measurement Peak measure...

Page 54: ...z 5 85 MHz I positive AM peak FM DQPSK 6 0 MHz 6 552 MHz L positive AM peak AM DQPSK 6 5 MHz 5 85 MHz MN negative AM peak FM FM 4 5 MHz 4 72 MHz DVB C digital power DVB T H digital power DVB T2 digita...

Page 55: ...ge it s the security available before disconnection The bargraphs are displayed with colors depending on the measured error rates GREEN good error rates ORANGE BERo 10 4 QEF Quasi Error Free without l...

Page 56: ...t time Recall Under DVB T H a packet is made of 204 octets a packet is false if it includes more than 8 wrong octets correction by Reed Solomon coding Display of the type of Modulation detected number...

Page 57: ...ty Check BCH Bose Chauhuri Houquenohem The concatenation Viterbi Reed Solomon of the correction of DVB T H has been replaced by the concatenation LDPC BCH under DVB T2 Display of the type of Modulatio...

Page 58: ...ate bits Ratio between the number of false bits number of transmitted bits during the measurement time PER error rate packets Ratio between the number of false packets number of transmitted packets du...

Page 59: ...te after BCH lost packets MER modulation error rate LKM noise margin Link Margin Recall LDPC Low Density Parity Check BCH Bose Chauhuri Houquenohem Display of the type of Modulation detected number of...

Page 60: ...r of transmitted bits during the measurement time PER error rate paquets Ratio between the number of false packets number of transmitted packets during the measurement time Recall Under QPSK DVB S a p...

Page 61: ...on error rate LKM Noise margin Link Margin Recall LDPC Low Density Parity Check BCH Bose Chauhuri Houquenohem The concatenation Viterbi Reed Solomon of the correction of DVB S has been replaced by the...

Page 62: ...informations PI Program Indentification PI code is an single code for each station 16 bits display in hexadecimal ECC Extended Country Code PI code est completed with the country code ECC The couple...

Page 63: ...ying audio using system MPEG Layer 2 DAB sound MPEG Audio Layer II DAB sound HE AAC V2 Dsiplay of BERo bit error rate measurement convolutive coding for DAB Reed Solomon for DAB Service information Se...

Page 64: ...ls measured Filters are automatically selected according to the Span The filter use dis displayed on the upper left corner Parameters of the spectrum are Channel use a channel for the spectrum in terr...

Page 65: ...n simulates the effect of a filter for LTE 4G signal It will display the simulated signal with filter it is used mostly for the high band channels 61 to 69 The red curve is the simulated spectrum usin...

Page 66: ...e and position The display of a TV program is possible only for non encrypted channels For encrypted channels the instrument will display conditional access Displaying TV program can take several seco...

Page 67: ...ode it is possible to change the display mode Normal normal mode continuous measurements MaxHold continuous measurement displaying the max level for each frequency Average continuous measurement displ...

Page 68: ...two limits Display of the value Automatic C N measurement Positioning of reference level Search for Maximum peak level Search for noise level Display of level difference Performing a manual C N measu...

Page 69: ...peak search on previous peak on next peak Min Max toggle between Min and Max on the screen R f set a reference cursor cross for Delta or C N measurements Fcent cursor frequency becomes center frequen...

Page 70: ...lace 25 Hz frame frequency MPEG 2 picture compression Video Rate 2 034 Mbits s instantaneous binary rate of the service Audio MPEG Layer II sound compression On this page there are 7 keys at the botto...

Page 71: ...Dolby laboratories Dolby and the double D symbol are trademarks of Dolby Laboratories 13 4 Table of services Pressing gives access to the list of services This function also allows you to select the...

Page 72: ...and output of the digital video signal MPEG are made according to the ASI standard asynchronous serial interface It is a serial asynchronous without a clock transmission at 270MHz on a coaxial cable...

Page 73: ...second press stops recording Notes it is not possible to play back the recorded stream by the instrument The TS file can be played on a computer with appropriate software When recording an encrypted c...

Page 74: ...key before Remote power supply The window allows you to select the remote power supply on terrestrial and or satellite mode 14 1 Terrestrial band In terrestrial mode you can select A green check shows...

Page 75: ...e even after shutting off OL1 frequency OL frequency low band of LNB OL2 frequency OL frequency high band of LNB OL selection band commutation on the LNB 22kHz ToneBurst or DiSEqC Selection polar pola...

Page 76: ...DiSEqC Committed or Uncommitted 16 satellite switch DiSEqC Committed Uncommitted Sat A Sat B Com 2 1 S a t A S a t B S a t D S a t C C o m 2 1 4 3 Sat A Sat B Sat D Sat C Com Sat A Sat B Sat D Sat C...

Page 77: ...2 Input 2 9 Pos A Option A Position A Pos 3 Input 3 10 Pos B Option A Position B Pos 3 Input 3 11 Pos C Option B Position A Pos 3 Input 3 12 Pos D Option B Position B Pos 3 Input 3 13 Pos A Option A P...

Page 78: ...atellites using only one coaxial cable SCD SINGLE CABLE DISTRIBUTION The DCSS is an extension of the DiSEqC protocol that allows the connection of several receptors on only one coaxial cable no matter...

Page 79: ...aximum of 32 different receptors Using Diseqc 2 0 bi directionnal possibility to ask current online devices and speed up installation Mode choice press DCSS SATCR EN50494 SLOT x active Slot choice CON...

Page 80: ...SATIONS 32 predefined slots ALLOCATION states of the 32 possible slots DETECT automatic detection of slots DISEQC2 0 based 14 2 4 1 Influence of the DCSS on the spectrum analyzer Landmarks of the user...

Page 81: ...ays the Constellation of the current signal On this page you can zoom on one of these quadrants by pressing You can change the display of the quadrant by pressing On this page there is a template with...

Page 82: ...e horizontal scale distance Horizontal scale can be set in s km or miles by pressing Moving measurement arrow can be done by screen touch or by automatic search keys and The end of the guard interval...

Page 83: ...transmission of digital data Symbol is interrupted during the guard interval A delayed or advanced symbol of any shorter duration than the guard interval will not disturb the reception A delayed or a...

Page 84: ...represents the end of the guard interval Echoes and pre echoes pulses above the yellow line disturb the signal and must be reduced as much as possible The echoes pulses beyond this line disturb the r...

Page 85: ...e launching time of the recording The save starts after browsing of all setups This is when the date and time are recorded The mode key allows you to select the duration between two measurements in th...

Page 86: ...ack the evolution of the scan The background color of this bargraph shows you that a complete scan has been made for a save for example red the measurement map has not been totally scanned yet green t...

Page 87: ...orange for values higher than Threshold max green for values between both thresholds You can measurement the discrepancy between the levels of two setups thanks to the Ref and Curs dots that you can...

Page 88: ...7871 7872 7875 7876 p 88 You may know the name of the setup by pressing directly on the graphic bar you want...

Page 89: ...he MER of each carrier is displayed and each hole represents a potential problem on the signal or a spurious A real signal is fluctuating a little bit This must be taken into account during analysis I...

Page 90: ...go to the Home page then Configuration 19 1 Language You can select your language by pressing the flag below Press the flag corresponding to your language 19 2 Expert mode This key leads you to the ex...

Page 91: ...dBmV corresponds to 1 mV dBm 0 dBm corresponds to 274 mV 1 mW with a 75 impedance V measure in V mV and V according to the level 19 4 Frequency map This key allows you to select the terrestrial freque...

Page 92: ...s The first column contains the order number of the file the second column contains the name of the file the last column contains the type of file Measure Spectrum Measurement map By pressing a line o...

Page 93: ...to a report in a PC computer Here is the BMP file of the previously displayed DVB T H channel edited on PC to have the spectrum full screen Save CSV USB allows you to export the file to the USB stick...

Page 94: ...s ECHO for the echoes Save all CSV USB also records all files from the appliance into separated registers but under CSV format 19 5 3 Delete Delete erases the selected file with confirmation Delete al...

Page 95: ...the number of trials It is mandatory to register your instrument and the password to recover a lost password from SEFRAM please use the template supplied on the CD ROM Attention if you have lost your...

Page 96: ...liance to a PC 19 6 5 Configuration You can update all or a part of the configuration of the appliance thanks to the software PC TR7837 you can download it free of charge from our website Embedded Hel...

Page 97: ...the previous configuration will be saved into a CONF directory One file SAT CSV for Check Sat One file CONF CSV for setups If no CSV file is present on the USB memory stick only the older configurati...

Page 98: ...ness 50 brightness will spare the battery life of the appliance Attention a Screen Saver will be displayed 2 hours after last time using the device 19 8 Factory recovery A complete set up of the appli...

Page 99: ...guration then press Adjustment Check that the active USB port is the USB port A and that nothing is connected on the USB port mini B Insert the USB stick into the connector of the appliance Select Upd...

Page 100: ...machine interface The default name of the save is MEM X 1 X is the number of saves in the appliance You will be suggested a save into internal memory only in the Spectrum Measurements Constellation G...

Page 101: ...s Vista Windows XP Windows Seven For any other operating system please contact the technical support SEFRAM Your PC should also have a free USB port 22 2 USB mini B interface To use the mini B USB Con...

Page 102: ...ation of the connection Ethernet connection of your appliance to the PC To change the IP address of your appliance press and then Adjustment The PC software in communication with the appliance must ha...

Page 103: ...e subnet mask in the appliance 3 Type the same IP address and subnet mask in the PC software you re using Attention If the PC has already been connected to Ethernet network modem it is necessary to re...

Page 104: ...sponder Example Atlantic Bird3 5 W uses Multistream for some transponders Frequency 12648MHz Vertical DVB S2 29500 ISI Gold code 121212 To use Multistream function press MIS in the Measures screen Cod...

Page 105: ...EW function The appliance starts searching several satellites to find its own position with accuracy When satellites have been found they appear on the pattern non locked satellites blink The data on...

Page 106: ...ction This function is made for superimpose on a map all measurements level BER of RF signal received This function is used to create a file GPS inside internal memory of your appliance with for each...

Page 107: ...etup by setup RF C N BERi BERo PER MER LKM All the configuration is available from key Measure type Level BER MER measurements of current Setup Measurement Map setups 1 to 11 from Measurement Map Acqu...

Page 108: ...opens the GPS file to start recording The appliance record measurements according to parameters manual timer distance in the file Stop closes the GPS file to stop recording the file can not be opened...

Page 109: ...Google Maps par exemple After creating GPS file inside your appliance you can export it to an USB memory stick with CSV format for using a spreadsheet software with KML language This language is used...

Page 110: ...our computer clic 2 times on the file KML you have created the software show you your records moves and measurements Example using Google Maps After creating a account Google Maps on your computer imp...

Page 111: ...losses measurement make a first measurement on top of your network press the instrument keep this measurement as Reference and automaticaly change unit to dB make all other measurement you need to che...

Page 112: ...he SMA connector You can measure the RF level received of your Wi Fi network or display the list of Wi Fi networks received by your appliance with text display by SSID and graphical display Histogram...

Page 113: ...on working on the appliance This function allows you to visualize the screen of the appliance on a television or any screen with a HDMI input you can still manage the functions of the appliance with...

Page 114: ...essages Low battery the appliance is about to shut off in a few minutes Confirmation request for an important action Remote power supply issue cable under tension or excess intensity above maximum Mes...

Page 115: ...p at the bottom of the screen immediately after updating the software Do not take it into account as far as it does not show up at a second start up Else or for any other problem contact the SEFRAM te...

Page 116: ...vice does not engage the responsibility of SEFRAM I S It guarantees the best possible use of the characteristics and the preservation of the product Routine maintenance The basic maintenance is simply...

Page 117: ...he mounting of the screen on your instrument to the respect of the acceptance conditions of the manufacturers Acceptance criteria Zone A central zone total less than 5 defective pixels less than 3 con...

Page 118: ...TV Display PID NIT Display Constellation Display MER porteuse Display Echos pre Echos Fast Spectrum Analyser Expert Spectrum Analyser Triple display Measures TV Spectrum Satellite dish alignement dou...

Page 119: ...yes with all information displayed on spectrum Filters according to span 100kHz 300kHz 1 MHz 1MHz 3MHz 10MHz Attenuator automatic or manual 0 to 55 dB with 5 dB step Dynamic range display 60 dB 10 dB...

Page 120: ...1 7MHz 5MHz 6MHz 7 MHz 8 MHz Mode SISO MISO PLP single ou multiple FFT type 1k 2k 4k 8k 16k 32k extended bandwidth auto Constellation QPSK 16QAM 64QAM 256QAM auto Viterbi rate 1 2 3 5 2 3 3 4 4 5 5 6...

Page 121: ...769 DVB S DSS Bit Error Rate BER CBER before Viterbi BERi VBER after Viterbi BERo UNC lost packets PER Link margin Modulation Error Rate MER 0 20dB Symbole rate 1 to 45Ms s Constellation QPSK Viterbi...

Page 122: ...te 50Hz WiFi antenna input option measurement of levels per SSID GPS antenna input option TNC remote supply 5VDC Cartography of RF levels using KML files format SNR of satellites in view Recording num...

Page 123: ...tective pouch mounted with belt and clip transportation bag the display of encrypted programs is possible for supported encryption with a valid subscription Contact our technical department for more i...

Page 124: ...N 108 75 dBm Ud 1 mV N 60 dB V N 0 dBmV N 48 75 dBm Ud 1 V N 120 dB V N 60 dBmV N 11 25 dBm 30 8 Typical values for measurements Values given are indicatives minimum and maximum for good signal quali...

Page 125: ...7871 7872 7875 7876 p 125 31 CE Declaration...

Page 126: ...6 SEFRAM 32 rue Edouard MARTEL BP 55 F42009 SAINT ETIENNE Cedex 2 France Phone 33 0 4 77 59 01 01 Fax 33 0 4 77 57 23 23 Sales department e mail sales sefram fr Technical support e mail support sefram...

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