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DS2400T DVB-T2 Signal Analysis Meter Operation Manual

3.11 Return Path Spectrum

Press

to return to main menu interface and

press

to select the

R-PATH

icon, and

then press

to enter R-PATH function, as Figure

3-11-1.

Figure3-11-1

In the interface of the R-PATH

function, the default

parameter set is Start frequency: 5MHz, Stop

frequency: 45MHz, Reference: 40dBuV, Scale: 5dB/div,

Demodulation mode: peak mode.

In this function

，

to view the detailed soft key

instruction, please refer to

3.6.1 and 3.6.2.

Содержание DS2400T

Страница 1: ...O Op pe er ra at ti io on n M Ma an nu ua al l D DS S2 24 40 00 0T T D DV VB B T T2 2 S Si ig gn na al l A An na al ly ys si is s M Me et te er r V Ve er r 1 1 2 21 1...

Страница 3: ...ate correctly according to the manual Deviser shall have no responsibility for any defect or damage caused by improper use and maintenance or for any product which has been repaired or altered by any...

Страница 4: ...ement 4 1 8 Voltage Measurement 5 1 9 Multiple User Channel 5 1 10 File Management 5 1 11 Intelligent Power Management 5 1 12 DVB C channel measurement 6 1 13 BER Statistics 6 1 14 DVB T2 channel meas...

Страница 5: ...nning 50 3 9 HUM Measurement 54 3 10 Limit Measurement 56 3 11 Return Path Spectrum 61 3 12 File Management 62 4 Setup 71 4 1 Brief Introduction 71 4 2 INFORMATION 73 4 3 GENERAL 74 4 4 Measurement Pa...

Страница 6: ......

Страница 7: ...in function of CATV system measurement including digital TV and analog TV This model can measure and display most indexes of Digital TV Channel Power MER BER Constellation Diagram Analog TV Single fre...

Страница 8: ...Manual 2 Features QAM and QPSK Test Level Test Constellation Diagram Channel Scanning Spectrum Scanning Tilt Test Limit Test HUM Voltage Measurement Multiple User Channel Plan Setup File Management M...

Страница 9: ...ation modes of QAM and QPSK Here you can get Channel Power MER and BER and Constellation Diagram NOTE For DVB T channels MER and BER test is only in QPSK and QAM 16 64QAM Modulation Mode 1 2 Constella...

Страница 10: ...o 5 steps zoom in out and marker function make your observation easier 1 6 Spectrum Scanning DS2400T has spectrum function which provides several spans and two sample modes AVG and PEAK In order to de...

Страница 11: ...annels or mixed channels Also they can be switched easily So it is very suitable for multi network maintenance 1 10 File Management DS2400T can store the results of channel level test constellation te...

Страница 12: ...efault In order to use them you have to contact DEVISER to order DVB C option 1 12 DVB C Channel Measurement DS2400T supports accurate signal level test in DVB C signals mode For DVB C channels DS2400...

Страница 13: ...s function will not be installed on DS2400T as default In order to use that you have to contact DEVISER to order DVB T2 option 1 14 DVB T2 Channel Measurement DS2400T supports accurate signal level te...

Страница 14: ...400T DVB T2 Signal Analysis Meter Operation Manual 8 2 Introduction 2 1 Appearance Get acquainted with the appearance before use Serial Port RF Interface LCD Keyboard Charge Status POWER Charge Interf...

Страница 15: ...tom of screen 2 2 2 Shortcut Keys There are three keys below the three soft keys including Press key can directly back to menu screen and key is used as different functions in different screen 2 2 3 C...

Страница 16: ...he button after which you press the same button repeatedly to scroll through the letters associated with the button To enter a second letter or number using a different button you can go directly to t...

Страница 17: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 11 2 3 Display Description...

Страница 18: ...Function Menu Display Figure3 1 1 The Figure 3 1 1 Display the Main Menu which include all ofthefunctionicons Soft Keys Enter the selected shortcut interface Switch the selected shortcut on the left...

Страница 19: ...Analysis Meter Operation Manual 13 Function keys Switch the selected shortcut on the up direction circularly Switch the selected shortcut on the down direction circularly The selected shortcut will d...

Страница 20: ...the cable system automatically and save in this channel plan The User Channel Plan includes three elements as follows Channel number Channel format TV DIGI Carriers frequency video and audio The foll...

Страница 21: ...T2 Signal Analysis Meter Operation Manual 15 Figure3 2 1 Then press the or select the CHANNEL PLAN item as Figure3 2 2 Figure3 2 2 Now press into Figure3 2 3 CHANNEL PLAN then press select the user c...

Страница 22: ...Signal Analysis Meter Operation Manual 16 Figure3 2 3 3 Press or to select the LEARN CHANNEL PLAN item and press the LEARN CHANNEL PLAN function displays as Figure 3 2 4 Figure3 2 4 Press to select on...

Страница 23: ...T then press to creat your user channel plan For a while new user plan will be saved automatically NOTE The analog channels with level higher than 45dB V and digital channel with power level higher th...

Страница 24: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 18 3 3 Level Measurement Press return to main menu press the or to select the LEVEL shortcut as Figure3 3 1 Then press Figure3 3 1...

Страница 25: ...ay as figure 3 3 2 Now if you want to do any test in this function you have to create a valid channel with press Figure3 3 2 The channel list will display as figure 3 3 3 Press or to select the channe...

Страница 26: ...Meter Operation Manual 20 Figure3 3 3 Figure3 3 4 Press or to select the channel parameters if the selected parameter could be changed press to change As the figure 3 3 4 ensuring the STATUS is enabl...

Страница 27: ...ual 21 3 3 1 Analogue channel measurement If the current channel is a valid analogue channel The Level function will display as Figure3 3 5 three test results are displayed in the screen include Video...

Страница 28: ...n this screen Figure3 3 6 ONE CHN ADJ CHN The user can switch display mode between One Channel and ADJ Channel One Channel Mode The histogram shows the video and audio of current channel only as figur...

Страница 29: ...23 Figure3 3 7 and is used for switch channels circularly If the next channel is digital channel the screen will be changed Refer to chapter 3 3 2 Press this button to next page as figure 3 3 8 the u...

Страница 30: ...show single frequency measurement interface as figure 3 3 9 the user can modify the frequency press this button again to return and is used for switch frequency circularly SAVE Press this button to s...

Страница 31: ...igital channel measurement DS2400T is able to measure POWER MER and BER As figure 3 3 10 Figure3 3 10 CH INFO Press this button will display the channel information of the current channel as figure 3...

Страница 32: ...isplay mode between One channel and ADJ channel One channel mode The histogram shows the Power of current channel only ADJ channel mode The histogram shows the Power of current channel and also show t...

Страница 33: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 27 Figure3 3 12 Press this button to next page as figure 3 3 13 the user can press this button again to return Figure3 3 13...

Страница 34: ...he next channel is digital channel the screen will be display as figure 3 3 10 FREQ Press this button into frequency measurement interface as figure 3 3 14 In this mode the user can easily modify the...

Страница 35: ...FAIL in big font is displayed in the screen to indicate the quality of current channel as the figure 3 3 5 and figure 3 3 10 the limit value to judge the quality of channel can be showed in the measur...

Страница 36: ...n menu interface and press or choose CONSTEL icon and then press to enter constellation measurement DS2400T constellation diagram function supports modes of QAM and QPSK Here you can get channel POWER...

Страница 37: ...s button to display the current channel information as figure 3 4 2 and user can modify all of the parameters in this menu Figure3 4 2 FREQ Press this button to display the current frequency POWER MER...

Страница 38: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 32 Figure3 4 3 Press this button to next page as figure 3 4 4 Figure3 4 4...

Страница 39: ...er number by keyboard as figure 3 4 5 Note Here the MER just measure one carrier which you modified by the keyboard Or it is the average MER for all carriers when the CARR display ALL as figure 3 4 4...

Страница 40: ...h the select quadrant on clockwise direction ZOOM IN ZOOM OUT Press this button and switch the status of constellation diagram between zoom in and normal mode Press zoom in key again the selected quad...

Страница 41: ...ation Manual 35 Figure3 4 7 and are used for switching digital channels circularly Note This function only supports digital channels if the current user plan doesn t have any digital channels the scre...

Страница 42: ...rement Press to return to main menu interface and press or choose BER statistics icon and then press to enter statistics measurement DS2400T is able to make BER statistics during set time the user can...

Страница 43: ...one or more mistakes which can be corrected or not be corrected and then ES plus1 SES Serious error seconds During 1s if the result of the number of errors that can not be correct divided the total b...

Страница 44: ...enu TIME Press this button to set the statistics time DS2400T supports several fixed time 5 minutes 15 minutes 30 minutes 60 minutes 2 hours 6 hours 12 hours 24 hours and 48hours START STOP Press this...

Страница 45: ...interface and press or to select the SPECT icon and then press to enter spectrum function DS2400T s spectrum function supports double marker display and peak hold function as Figure 3 6 1 Here you ca...

Страница 46: ...y figure Input directly AUTO Press AUTO soft key to adjust reference level and scale quickly The meter will automatically adjust them to most optimal state Press this button to change the soft menu as...

Страница 47: ...ou can modify or adjust measurement parameter Press can highlight the selected parameter and then press or or press the character digit keys directly Figure3 6 3 REF REFERENCE LEVEL After selecting th...

Страница 48: ...t will be an average of several sample value It will be faster than the PEAK mode and also if you want to measure the noise of the system you need to select this mode PEAK positive peak mode the displ...

Страница 49: ...ing function any frequency from 5 to 1052MHz can be input SPAN After selecting the SPAN parameter press or to adjust the span among 2 5MHz 6 25MHz 12 5MHz 25MHz 62 5MHz and FullBand MAX After selectin...

Страница 50: ...0T DVB T2 Signal Analysis Meter Operation Manual 44 MARKER B After selecting the MARKER B parameter the purple marker B becomes active marker pressing or can move the purple marker to the wanted view...

Страница 51: ...itter s gain of cable system DS2400T can get levels of 12 channels and observe the measurement result and graph easily Press to return to main menu interface and press or and choose FAV TILT icon then...

Страница 52: ...re 3 7 2 press or to change the highlight line and then press the to select or unselect the channel Here the and button have been defined to page up and page down The means this channel is selected If...

Страница 53: ...menu interface and press the again to enter the Tilt Level List measurement Now the Tilt measurement can be continued 3 7 1 Tilt Graph Mode In tilt test interface the channels will be displayed as hi...

Страница 54: ...re 3 7 4 Figure 3 7 4 SAVE Press this button to save the result of tilt test SETUP When testing press this button to enter into Figure 3 7 2 to re select tested channels 3 7 2 Tilt List Mode In figure...

Страница 55: ...testing press this button to enter into Figure 3 7 2 to re select tested channels Here the and button is defined to switch the tilt channel which s test result will be displayed at the bottom of scree...

Страница 56: ...of cable TV system quickly Press to return to main menu interface and press or to select the SCAN icon and then press to enter Channel Scanning function as Figure 3 8 1 The scanning graph of current...

Страница 57: ...fy the cursor location Then the parameter which highlighted on the yellow color background can be modified by or MARK In figure 3 8 1 press the or and the marker with red color will move left or right...

Страница 58: ...ay 150 channels in the screen 5 Max display 255 channels in the screen SCALE Press TAB to select the SCALE and switch between 1dB 2dB 5dB and 10dB by pressing or AUTO Press AUTO soft key to adjust ref...

Страница 59: ...Signal Analysis Meter Operation Manual 53 Figure 3 8 2 STOP Press STOP soft key the scanning will stop and you can continue the scanning by pressing it again SAVE Press this button to save the result...

Страница 60: ...nt to analogue channel Press to return to main menu interface and press or to select the HUM icon and then press to enter HUM function Show as Figure 3 9 1 HUM modulation is also named power hum modul...

Страница 61: ...50Hz 60Hz Press to switch the frequency of system power between 50Hz and 60Hz as figure 3 9 2 Figure 3 9 2 SAVE Press this button to save the result of HUM test or are used to switch analogue channel...

Страница 62: ...shown in figure 3 10 1 Figure 3 10 1 DS2400T is able to detect cable TV system rapidly and check out the number of unqualified channels and the reason of unqualified channels The amplitude of each cha...

Страница 63: ...s List After the limit test scanning the general test results of cable system will be listed The test items are consist of minimum video level maximum video level maximum delta video level minimum V A...

Страница 64: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 58 Press to list as figure 3 10 3 Figure 3 10 3 Press to view the graph as figure 3 10 4 Figure 3 10 4...

Страница 65: ...press this button again to return Figure 3 10 5 RETEST Press RETEST to retest SAVE Press SAVE soft key to save the result of Limit test 3 10 2 Limit Edit You can edit the limit setup in SETUP First e...

Страница 66: ...er Operation Manual 60 Figure 3 10 6 If you want to change a parameter press to select the parameter press or to change Press to LOAD DEFAULT and then press you can select the default To view the deta...

Страница 67: ...he R PATH icon and then press to enter R PATH function as Figure 3 11 1 Figure3 11 1 In the interface of the R PATH function the default parameter set is Start frequency 5MHz Stop frequency 45MHz Refe...

Страница 68: ...ncy by 5MHz 45MHz and 5MHz 65MHz 3 12 File Management Press to return to main menu interface and press or to select the FILES icon and then press to enter FILE management function as Figure 3 12 1 Fig...

Страница 69: ...ile If you have made measurements in LEVEL TILT SCAN SPECT LIMIT and HUM at least one of them Press and select the FILE icon and then press the file list menu will display as figure3 12 2 Figure 3 12...

Страница 70: ...ter Operation Manual 64 Figure 3 12 3 After rename the new file press or to DATA LIST all the parameters could be saved have been listed and the default status is that all parameters have been selecte...

Страница 71: ...lect the data item as figure 3 12 5 Figure 3 12 5 SAVE Press this button to finish saving a file after finished save file the screen will return file list menu as figure 3 12 2 3 12 3 Read File Press...

Страница 72: ...Figure 3 12 6 Normally the data items can be opened using LIST mode Press or to select the data item and then press LIST to list a data item in LIST mode as figure 3 12 7 3 12 8 3 12 9 3 12 10 3 12 11...

Страница 73: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 67 Figure 3 12 7 Figure 3 14 8 is Tilt measurement results List Figure 3 12 8...

Страница 74: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 68 Figure 3 12 9 is Scan measurement results List Figure 3 12 9 Figure 3 12 10 is spectrum measurement results List Figure 3 12 10...

Страница 75: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 69 Figure 3 12 11 is HUM measurement results List Figure 3 12 11 Figure 3 12 12 is Limit measurement results List Figure 3 12 12...

Страница 76: ...re 3 12 2 Select one file by press or and press DELETE to delete this selected file the DELETE FILE dialog will display as figure 3 12 13 Figure 3 12 13 Press YES in figure 3 12 13 to return file list...

Страница 77: ...ect the SETUP icon and then press to enter SETUP menu as Figure 4 1 1 Figure 4 1 1 INFORMATION General information of the DS2400T includes manufacturer information version and so on GENERAL The setup...

Страница 78: ...MEASUREMENT Level unit Level Calibrate Limit setup Auto Diagnosis and Voltage temperature measurement CHANNEL PLAN The setup for channel plan includes user plan selection learn and edit user plan LOAD...

Страница 79: ...nal Analysis Meter Operation Manual 73 4 2 INFORMATION This is the information of the instrument Refer to Figure 4 2 1 It includes serial number software version hardware version calibration date and...

Страница 80: ...set to shutdown automatically for inactive keypad after 3 minutes 5 minutes 10 minutes 30 minutes and ON never shutdown mode as Figure 4 3 1 Figure 4 3 1 4 3 2 Language Selection The language of DS240...

Страница 81: ...alysis Meter Operation Manual 75 Figure 4 3 2 Note Contact Deviser for more languages 4 3 3 Date and Time When there is something wrong in system date or clock user can calibrate new date or time as F...

Страница 82: ...4 Files Status This interface shows the number of files have been saved and also show the Memory status as figure 4 3 4 Figure 4 3 4 4 3 5 Option This section is used for user to enable or disable th...

Страница 83: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 77 Figure 4 3 5 In figure 4 3 5 press ENTER and input correct code to enter the option interface as figure 4 3 6 4 3 7 Figure4 3 6...

Страница 84: ...ontact Deviser or our local distributor to buy the option password Enable Disable In figure 4 3 7 user can press to enable or disable the DVB C option 4 3 5 1 Enable Optional Function Press ENABLE scr...

Страница 85: ...nalysis Meter Operation Manual 79 Figure 4 3 8 Note Please contact Deviser or our local distributor to buy the DVB C T2 function code Here user need to input password by character digit and keys as fi...

Страница 86: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 80 After inputting correct password and press ENTER the corresponding optional function will be enabled in figure 4 3 10 Figure 4 3 10...

Страница 87: ...figure 4 3 10 press DISABLE to disable the optional function screen will display as figure 4 3 11 Figure 4 3 11 In figure 4 3 11 if press YES the corresponding optional function will be disabled but i...

Страница 88: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 82 4 4 Measurement Parameter Setup 4 4 1 Level Unit Figure 4 4 1 4 4 2 Level Calibrate Figure 4 4 2...

Страница 89: ...User can make amendment and compensation of the measure data in all level measurement function press MODIFY to highlight the level offset box and then press or to adjust it and press ENTER to enable t...

Страница 90: ...ages of Limit setting have been provided as Figure 4 4 3 Figure 4 4 4 Figure 4 4 5 and Figure 4 4 6 Five Limit items included in page one 1 4 which is used for DVB T singles test The default value of...

Страница 91: ...ER 10dB CBER 1E 5 VBER 1E 7 Page two 2 4 is used for analog TV test The default value of these Limit items are list as Table 4 4 2 The difference between MAX VIDEO and MIN VIDEO must be larger than si...

Страница 92: ...se Limit items are list as Table 4 4 3 The difference between MAX POWER and MIN POWER must be larger than six dB Table 4 4 3 Item Limit Minimum Power level 50dB V Maximum Power level 90dB V Minimum ME...

Страница 93: ...to adjust it If you want to load default values of all limit items on each page please press the TAB to choose the LOAD DEFAULT button on the bottom of that page and then press to confirm NOTE If the...

Страница 94: ...nosis function PASS and FAIL refer to 3 3 3 as figure 4 4 7 Figure4 4 7 NOTE Before the auto diagnosis function can be work correctly the Limit items in section 4 4 3 must be set the validvalues 4 4 5...

Страница 95: ...lysis Meter Operation Manual 89 4 4 5 1 Battery Voltage As Figure 4 4 8 battery voltage will be displayed on the screen When it is lower than 10 6V this meter will remind that it will shut down automa...

Страница 96: ...atically judge whether it is AC or DC in the trunk and display the trunk voltage on the screen as Figure 4 4 9 Figure 4 4 9 4 4 5 3 Temperature Inside DS2400T can monitor inside temperature itself and...

Страница 97: ...DS2400T DVB T2 Signal Analysis Meter Operation Manual 91 Figure 4 4 10 Figure 4 4 11...

Страница 98: ...lect User Plan Up to five user plans can be built and saved The user plans are labeled as A B C D and E User can choose one as current user plan as Figure 4 5 1 Then the meter will measure according t...

Страница 99: ...mode or standard alphanumeric mode After choose the meter will show the channel number as you desired in any measurement mode Refer to Figure 4 5 2 Figure4 5 2 4 5 3 Learn User Plan You can build and...

Страница 100: ...user plans you can enter into SELECT USER PLAN and then make the LEARN USER PLAN operation Detailed operation refer to 3 2 4 5 4 Edit User Plan The user plan is combined by following Digital numeric c...

Страница 101: ...IT CHANNEL PLAN will show the channels list on the screen as Figure4 5 3 you can only exit this function by press the HOME key press or to highlight one channel and press to edit status as Figure 4 5...

Страница 102: ...attery is lower than 10 6V the instrument will shut down automatically The charge time is about 3 hours NOTE 1 The meter can be only charged by the charger provided together with DS2400T 2 When upgrad...

Страница 103: ...d the charger indicator will light with red 3 When indicator become to green the instrument has been fully charged It is suggested to charge another one hour after indicator change to green This way c...

Страница 104: ...rough the 5 Pin communication port Refer to figure 6 1 Figure 6 1 1 TXD 2 RXD 3 NC 4 5V 5 GND Management PC software Toolbox is provided as standard You can remotely control the instrument to do the m...

Страница 105: ...MHz Function Power MER CBER VBER DVB T Signal Parameters Carriers 2K 8K Guard Interval 1 4 1 8 1 16 1 32 Code Rate 1 2 2 3 3 4 5 6 7 8 Modulation QPSK 16QAM 64QAM Spectral Inversion Automatic Bandwidt...

Страница 106: ...R DVB T2 Signal Parameters Carriers 2K 8K 4K 1K 16K 32K Guard Interval 1 32 1 16 1 8 1 4 1 128 19 128 19 256 Code Rate 1 2 3 5 2 3 3 4 4 5 5 6 Modulation QPSK 16QAM 64QAM 256QAM Spectral Inversion aut...

Страница 107: ...ve Bandwidth 280 KHz Channel Type Analogue TV TV Digital TV 16 32 64 128 256 QAM Analog Level Measurement Range 30dB V to 120dB V Accuracy 1 5dB Resolution 0 1dB Input Impedance 75 Digital Channel Dem...

Страница 108: ...Range 30dB V to 110dB V Accuracy 2 0dB Resolution 0 1dB Channel Scan Number of Channels 160 channels max Scanning Speed 5 channels s Scale 1 2 5 10 dB div Zoom 1X 2X 3X 4X 5X five levels of magnificat...

Страница 109: ...esolution 0 1V Other Function Storage 512K byte Communication Port RS 232C Store Temperature 20 50 Dimensions Handset about 218mm 95mm 49mm Weight Handset about 700g Display 320 240 OLED Power Supply...

Страница 110: ...l Analysis Meter Operation Manual 104 8 Standard Accessories Standard Accessories Quantity DS2400T 1 AC DC Power Adapter Charger 1 Data Cable Serial to USB 1 Carrying Bag 1 F connector 2 Manual and To...

Страница 111: ...in 3rd Road Address 780 Montague Expressway Hi tech Industrial Development Area Suite 606 San Jose CA 95131 USA Tianjin China 300392 Tel 1 408 931 0948 Tel 86 2764 5003 ext 803 http www deviserinstrum...

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