TV Signal Level Meter GD300DQ User Manual (EN)
Contents
1. 21 3 1 1 Changing measured CLINIC 23 3 1 2 CHANGING measured frequencys 27 37 3 QAM measurement eren 24 74 COPslellallon ias in e Re RR EHE 25 3 2 ANALOG CHANNEL SIGNAL 26 3 3 FREQUENCY SPECTRUM MEASUREMENT eene 28 3 3 7 Screen band adjustment 29 3 3 2 Central spectrum frequency fnput s sse 30 3 4 7 Reference level adjustment sees 37 342 Mark adjustment E E R AR 37 3 5 TILT MEASUREMENT sssssescsscocoscococcococcococeseoceseoceseoeeseoseseososeossoecssocsssocossocosssessese 32 3 6 TRUNK LINE VOLTAGE MEASUREMENT s ssssssssssesesescococossosoosesesescocoesosossesesessses 34 3 7 CARRIER NOISE RATIO MEASUREMENT sssessosessosesoosososossosossososoosesossssosossssess SO 4 POWER SUPPLY FOR THE METER essssssessssoseosssosseooesssssosessssosseosssosess 27 5 TECHNICAL DATA sesecceseccosecossecossecossecossccossccssscesoscesoecesoecesseecsoeecoseecsesesseee 40 User Manual of Digital Signal Level Meter 1 General Explanations for TV Field Intensity Meter 1 1 Introduction to the meter This product is designed for CATV engineering and management technical personnel It is a hand held TV Field Intensity which applies to the need of the television and cable television engineering installation and detection The instrument adopts the all number display and micro processing unit the readings2. LEHTER FREGLIEHC 22 A Cw Fig 2 11 User Manual of Digital Signal Level Meter 2 2 5 Creating a user channel plan CHIHA PLA EDIT PLAH CREATE PLAH USERI PLAH A user channel plan can be created by following the steps below 1 Connect the cable of cable TV 2 Select the create a user channel plan as showed in Fig 2 12 press F3 to enter next level indicates the finished degree of the creation Press the enter key or return key to save or cancel this setting User Manual of Digital Signal Level Meter Notes The instrument must be connected to the cable TV system when user is creating a user plan The instrument will select the channels whose levels are more than 40dBuV in the reference channel plan the selected channels will be showed in the user plan and will automatically recognize the digital analog signal Owing to the complexity of the actual signal user s editing is required User can edit the user plan in the channel editing menu 2 2 6 The selection of measurement unit A level unit is selected as showed in Fig 3 9 1 CHIHA PLBH LEVEL LIHIT PROBE LUSS User Manual of Digital Signal Level Meter Fig 2 13 Press F3 to select the measurement unit and then press Fi or Fa or up and down key to choose the desired unit press E3 again to save the setting Measurement units are dBuv dBmv dBm 2 2 7 Probe loss In the system setting
3. User Manual of Digital Signal Level Meter 2 2 3 Selecting a channel plan CHIHA PLAH CHAHHEL PLAH EDIT PLHH CCIE PLAH Fig 2 8 Press F3 to click the channel showed below the screen and then press F1 or F2 orf choose the desired channel 4 plan push the F3 again to save the setting 2 2 4 Editing a channel plan User can freely edit a channel plan including the name of a channel valid type channel type vision carrier frequency and sound intermediate frequency when switching the channel type to the digital channel user may also edit the center User Manual of Digital Signal Level Meter frequency bandwidth modulation mode and symbol rate of the digital channel PLAH EDIT PLAN Fig 2 9 Press F3 to enter the channel editing mode press F1 or F2 Cor f key and adjust the cursor to the channel needed to be edited Fig 2 10 press F3 to set the parameters of this channel Fig 2 11 press F3 again to save the setting Press Return key to return to the previous menu 2 10 A V indicated at the end of the channel means this channel is under digital channel measurement User can quickly view the whole channel plan by pressing up and down key under this interface 12 User Manual of Digital Signal Level Meter ES CHIHB FFEEC zia PUBL It 57 SMHz E5 T5MHz Fig 2 10
4. the some questions during the process of your operation you can get in touch with the technical support department 42 User Manual of Digital Signal Level Meter Table of Portugal TV channel digital central frequency CCIR PAL B G Channel List CH NO DISPLAYCH NO VIDDEO AUDIO CARRIER CARRIER E2 CH02 48 25 53 75 E3 CH03 55 25 60 75 E4 CH04 62 25 67 75 X ZCHO01 69 25 74 75 Y ZCH02 76 25 81 75 2 ZCH03 83 25 88 75 2 1 ZCH04 90 25 95 75 2 2 2 05 97 25 102 75 51 ZCH 1 105 25 110 75 52 ZCH 2 112 25 117 75 53 ZCH 3 119 25 124 75 54 ZCH 4 126 25 131 75 S5 ZCH 5 133 25 138 75 S6 ZCH 6 140 25 145 75 S7 ZCH 7 147 25 152 75 S8 ZCH 8 154 25 159 75 S9 ZCH 9 161 25 166 75 10 ZCH10 168 25 173 75 E5 CH05 175 25 180 75 E6 182 25 187 75 E7 CHO7 189 25 194 75 E8 CH08 196 25 201 75 E9 CHO9 203 25 208 75 E10 CH10 210 25 215 75 E11 CH11 217 25 222 75 E12 CH12 224 25 229 75 43 44 User Manual of Digital Signal Level Meter 511 ZCH11 231 25 236 75 12 2 12 238 25 243 75 13 ZCH13 245 25 250 75 S14 ZCH14 252 25 257 75 15 ZCH15 259 25 264 75 S16 ZCH16 266 25 271 75 S17 ZCH17 273 25 278 75 S18 ZCH18 280 25 285 75 S19 ZCH19 287 25 292 75 S20 ZCH20 294 25 299 75 S21 ZCH21 303 25 308 75 S22 ZCH22 311 25 316 75 S23 Z
5. CHD showed in the channel means that the channel being measured is a digital signal channel the value of field intensity showed is average power The four icons on the soft keys at the bottom of the screen correspond to F2 F3 and F4 with the following functions respectively wT Frequency spectrum FRE Frequency measurement 21 User Manual of Digital Signal Level Meter QAM QAM measurement Next four function keys 4 Setup i File storage Press the key to enter the set the parameters of this digital channel refer to the figure 3 1 1 LUSH STD PLAH ES MEASURE 515 HEMHzZ A Fig 3 1 1 Press F1 UP and F2 DOWN key to set the channal parameters center frequency and measure BW 22 User Manual of Digital Signal Level Meter 3 1 1 Changing measured channel 1 Press left and right key to change the channel measured in the order on the channel plan 2 Enter the numerical input mode by directly pressing the numerical key Then key the channel number CH to change the channel Notes the channel number input must be the channel listed in the user channel plan otherwise the channel number input shall turn invalid Under the channel measurement mode press the CH to make the measured channel repeatedly switch between the vision carrier frequency and sound carrier frequency 3 1 2 Changing measured
6. measurement icon and press enter key to enter the interface showed in Fig 3 2 CHIHH PLAH 29 67 2 Se Fig 3 2 The measurement status of the meter can be switched channel by pressing under the channel mode being distinguished by CHV and CHA shown at the respective positions the corresponding frequencies displayed will also change At the same time the function corresponding to F3 switches between volume and A V ratio When the instrument is under aural carrier frequency measurement F3 is a volume adjustment key under visual carrier frequency measurement mode A V ratio measurement mode can be entered by 26 User Manual of Digital Signal Level Meter pressing F3 which is shown in Fig 3 2 1 Under this A V measurement mode the screen will show the image of the measured channel as well as the frequency and value of field intensity of the aural carrier frequency which the difference value between image s level and aural carrier frequency level ms ih CHIHB PLAH EUER zag S5 gm Eu Fig3 2 1 The meter will enter single frequency level measurement status in case the frequency keyed in by the user fails to be included in those listed in the channel plan or the frequency adjusted falls out of the corresponding frequency band Channel number will be displayed at the upper left corner of the liquid crystal screen while the cor
7. of Digital Signal Level Meter 4 Power Supply for the Meter One high performance rechargeable battery inbuilt 12V nickel hydrogen battery provides the power source of the whole instrument the alternative current can also be provides the power source by the battery charger attached with the instrument The instrument can continuously work for more than 8 hours when it is fully charged Notes 1 The instrument is equipped with the automatic electricity saving device when there are no keyboard operations over 5 minutes the instrument shall automatically shutdown the power source 2 The instrument has the function for testing the battery voltage automatically press the voltage measurement key the instrument shall show the battery voltage and the users can determine the consumption condition of the battery by way of checking the volume of the battery voltage The 37 User Manual of Digital Signal Level Meter instrument also has the function of the under voltage alarm when the internal power source of the instrument needs to be charged the instrument shall give out the attention sound so as to remind the users of charging timely otherwise the instrument shall automatically shut down the power source of the whole instrument 3 When the instrument is being charged please use the charger specially designed for the users When the users charge up the instrument please insert the battery charger direct current output in the cha
8. CH23 319 25 324 75 S24 ZCH24 327 25 332 75 S25 ZCH25 335 25 340 75 S26 ZCH26 343 25 348 75 S27 ZCH27 351 25 356 75 S28 ZCH28 359 25 364 75 S29 ZCH29 367 25 372 75 S30 ZCH30 375 25 380 75 S31 ZCH31 383 25 388 75 S32 ZCH32 391 25 396 75 S33 ZCH33 399 25 404 75 S34 ZCH34 407 25 412 75 S35 ZCH35 415 25 420 75 S36 ZCH36 423 25 428 75 S37 ZCH37 431 25 436 75 S38 ZCH38 439 25 444 75 S39 ZCH39 447 25 452 75 S40 ZCH40 455 25 460 75 541 ZCH41 463 25 468 75 E21 CH21 471 25 476 75 User Manual of Digital Signal Level Meter E22 CH22 479 25 484 75 E 23 CH23 487 25 492 75 E 24 CH24 495 25 500 75 E25 CH25 503 25 508 75 E 26 CH26 511 25 516 75 E 27 CH27 519 25 524 75 E 28 CH28 527 25 532 75 E29 CH29 535 25 540 75 E30 CH30 543 25 548 75 E31 CH31 551 25 556 75 E32 CH32 559 25 564 75 E33 CH33 567 25 572 75 E34 CH34 575 25 580 75 E35 CH35 583 25 588 75 E36 CH36 591 25 596 75 E37 CH37 599 25 604 75 E38 CH38 607 25 612 75 E39 CH39 615 25 620 75 E40 CH40 623 25 628 75 E41 CH41 631 25 636 75 E42 CH42 639 25 644 75 E43 CH43 647 25 652 75 E44 CH44 655 25 660 75 E45 CH45 663 25 668 75 E46 CH46 671 25 676 75 E47 CH47 679 25 684 75 E48 CH48 687 25 692 75 E49 CH49 695 25 700 75 E50 CH50 703 25 708 75 E51 CH51 711 25 716 75 E52 CH52 719 25 724 75 E53 CH53 727 25 732 75 54 54 735 25 740 75 45 46 User Manual of D
9. Se Fig 2 1 1 The light band visually indicates the Signal Level press the Up and Down button to adjust its level 2 Battery icon the status bar indicates the electric quantity of the battery 3 This icon shows the timing of non operational auto off User Manual of Digital Signal Level Meter 4 This is the channel that is being used by the instrument 5 The current working status of the instrument In this figure it is the level measurement mode now 6 The channel and frequency that are being measured 7 Measured value of the field intensity 8 Corrected value of the field intensity 9 The soft keys corresponding to F1 F4 2 1 2 About the MENU When pressing the MENU various measurement modes can be selected as shown in Fig 2 2 including digital channel measurement analog channel measurement frequency spectrum scanning panoramic scanning tilt measurement trunk line voltage measurement carrier noise ratio measurement and system setting etc User Manual of Digital Signal Level Meter ms 1 PLAH Fig 2 2 2 2 The setting of the instrument Please properly adjust and set this instrument to the best in accordance with the circumstance of the TV system to be measured before using this instrument All settings will be saved in the nonvolatile storage of the instrument User may also adjust these settings in any time Under the MENU mode Press the UP DOWN LEFT and RIGHT key to select a function i
10. Shanghai Grandway Telecom Tech Co Address 6F Xin an Building NO 99 Tianzhou Rd Shanghai 200233 P R China Website www grandway com cn Tele 86 21 54451260 61 62 Fax 86 21 54451266 Email overseas grandway com cn Grandway TV Signal Level Meter GD300DQ User Manual EN Contents 1 GENERAL EXPLANATIONS FOR TV FIELD INTENSITY METER 1 1 1 INTRODUCTION TO THE 1 1 2 INTRODUCTION TO THE PANEL eeeeee e eene nennen nennen 1 2 OPERATIONAL GUIDE TO TV FIELD INTENSITY MEASURING INSTRUMENT cccscssossssssesescssssssssessnsscnsesessssnsnsesonessscossssssesnsesosessnsososenenscnsssonoes 4 2 1 STARTING UP e C ERE OR 4 277 Screemulsolayisi eee ete qid de easiness 4 21 2 About the MENU siet tt ped 6 2 2 THE SETTING OF THE 5 7 22 7 The setting Of backlight fme ss esee 9 Z223Shutdown lme sudes ditta tati ee idet 9 223 Selecting a channel plan teretes 10 2 2 4 Eating a channel rennen 41 225 Creating a user channel 14 226 The selection of measurement 15 2207 FIODC TOSS se itestedenec vn o De Eee 46 22 8 Correct DB for Callbrating sese 17 229 Reset to factory 19 3 1 SIGNAL MEASUREMENT OF DIGITAL
11. User Manual of Digital Signal Level Meter 3 3 2 Central spectrum frequency input Input the frequency or channel number at the center of the spectrum by the digital keys then press the channel key or key In case the channel number is input the central frequency is automatically confirmed as the visual carrier frequency 3 4 Panoramic scanning measurement Press SCAN key on the keyboard to enter the panoramic scanning mode refer to Fig 3 4 Fig 3 4 Icons on the four soft keys at the bottom of the screen have 30 User Manual of Digital Signal Level Meter the followings functions respectively Fl Scanning stop key F3 The key for storing the measured results F4 Returning to previous picture 3 4 1 Reference level adjustment Directly press up and down key to adjust the reference level Remark the adjustment progressive interval of reference level is 5dB 3 4 2 Mark adjustment Press the up and down key the frequency mark can be moved rightwards or leftwards meanwhile the frequency pointed out by the mark can be and the level measured at this point will be displayed User Manual of Digital Signal Level Meter 3 5 Tilt measurement Select the icon of tilt measurement of the menu to enter the tilt measurement status as shown in Fig 3 5 CHIHB PLAH l r 67 4 CHI seu Fig 3 5 The 4 icons on the soft keys at the right of tile screen FI F4 have the following functions respective
12. alue detection Input impedance 750 Carrier noise ratio C N Signal input range gt 70dBuV Measurement precision 2 dBuV Voltage measurement Input scope 0 80V AC DC 40 User Manual of Digital Signal Level Meter Measurement precision 2V Resolving power 0 1V All the above mentioned technical indexes wholly represent the indoor temperature 25 C Others External dimension 250 X 120 X 50 mm Whole instrument weight 0 8 Kg Working temperature 10 C 45 C Monitor LCD Liquid Crystal Display with 128X128 figure lattice background light warm temperature Accompanying sound output inbuilt speaker numerical control Power source Direct current supply DC7 2V rechargeable battery Alternative current supply AC110 220V 50Hz 10 Battery work time continuous work gt 8 hours with enough charging power Charging time not gt 4 hours switch off Attached fittings 41 User Manual of Digital Signal Level Meter Special use charging power source Charger one piece Radio frequency input change connector Double F one piece Instrument bag one piece Operating instruction manual one brochure Attached cable one piece Attached CD disc Technological support Although we have made our efforts to simplify the operational method of SLM television field intensity instrument the applied scope of the cable television is very extensive therefore the measurement is still one complex work When you meet with
13. el when the corresponding channel display place glints When the tilt measurement mode is entered the instrument will measure this channel 33 User Manual of Digital Signal Level Meter The channel will not be stored without pressing the channel key and directly quitting the tilt measurement mode after adjusting the channel 3 6 Trunk line voltage measurement Press voltage measurement soft key to enter the level measurement status PLAN When the trunk line is charged with current the meter will automatically recognize the voltage and distinguish AC from DC by displaying them on the screen Refer to Fig 3 6 34 User Manual of Digital Signal Level Meter Meanwhile the screen also shows the voltage of the battery 3 7 Carrier noise ratio measurement Select the icon of carrier noise ratio measurement and enter the carrier noise ratio measurement mode refer to Fig 3 7 D CHIHB PLAH CHUIG sd 25 44 8 m Remarks 1 This function is valid only when the signal input level is higher than 70dB User Manual of Digital Signal Level Meter 2 The signal noise ratio is measured online thus the measured result is used only as reference 3 8 FILE Select the icon of File and press to the Enter Key to enter the File mode refer to Fig 3 8 PLAH Fig3 8 Function Keys definition F1 Select the file F2 Delete the selected files F3 read F4 return 36 User Manual
14. frequency 1 Enterthe numerical input mode by directly pressing the numerical key Then key in the channel number and MHz key to change the frequency 2 Asshown in Fig 3 1 press the soft key F2 and adjust the instrument under the frequency adjustment mode the 23 User Manual of Digital Signal Level Meter frequency that is being showed is the last measured value before shutting down the instrument press t the meter in frequency adjustment mode Adjust the flashing frequency to the desired progressive interval by pressing key then press left and right key to change the frequency 3 1 3 QAM measurement Press QAM Key to enter the QAM measurement mode as shown in Fig 3 1 2 CHIHB PLBH D 119 SR 315 HBhMHz 6408 Fig3 1 2 Function Keys definition Setup zzz Constellation i File storage 24 User Manual of Digital Signal Level Meter Return Press F1 constantly to choose the parameter which you want to change 3 1 4 Constellation Press key to enter the Constellation mode as shown in Fig 3 1 3 4 4 Ah How SE 648RM MER S48 Bde BER 1 HE 9 E Fig3 1 3 Press Arrow Keys to choose the area need to be zoomed in and then press F3 to zoom in or out Press F4 to return 25 User Manual of Digital Signal Level Meter 3 2 Analog channel signal measurement Select the analog channel signal
15. harging power is supplying working current to the instrument when it is in operation after plugging the accumulator charging socket When the instrument is not in 2 User Manual of Digital Signal Level Meter operation the accumulator is charging and the red charging indicator light will be turned on 13 Charging indicator light 14 External interface The Panel diagram is shown below E 8 9 9 gt N B69 tr OG e G6 E 9 User Manual of Digital Signal Level Meter 2 Operational Guide to TV Field Intensity Measuring Instrument 2 1 Starting up Press the power source switch on the instrument panel and set up an electric circuit and start up the instrument then the instrument shall send out a transient buzzing sound the name and ex factory serial number is shown on the display screen 2 1 1 Screen display Now we take the screen showing the single channel level measurement as an example Please see the figure 2 1 the four icons in the lower part of this screen are soft keys corresponding toF1 F2 F3 F4 their functions are Fl frequency spectrum measurement 4 User Manual of Digital Signal Level Meter F2 frequency measurement F3 the measurement of difference value of video and audio carrier level measurement F4 Menu turndown key 3 4 7 CHIHH PLAH al 29 67 2um i EL
16. igital Signal Level Meter E55 CH55 743 25 748 75 E56 CH56 751 25 756 75 E57 CH57 759 25 764 75 E58 CH58 767 25 772 75 E59 CH59 775 25 780 75 60 CH60 783 25 788 75 E61 CH61 791 25 796 75 E62 CH62 799 25 804 75 E63 CH63 807 25 812 75 E64 CH64 815 25 820 75 E65 CH65 823 25 828 75 E66 CH66 831 25 836 75 E67 CH67 839 25 844 75 E68 CH68 847 25 852 75 E69 CH69 855 25 860 75
17. ly F1 Channel selection Channel selection left key F2 Channel selection Channel selection right key file storage F4 return key There are five vertical light bands at the right of the screen representing respectively the signal level of the five frequency points preset by the user The user can compare the amplitude frequency response namely the flit at the concerned 32 User Manual of Digital Signal Level Meter frequency point by multi channel measurement method The user can preset the desired frequency point arbitrarily namely the user can decide the channel defined by any measurement channel The channel number and the Signal Level value will be displayed in the form at the center of the screen Each time when choosing a group of channel the frequency of the selected channel as well as the maximum difference value of field intensity between channels will be showed in the right lower part of the screen Press the Up and Down key for an adjustment REF progressive space 5 range 15 90 The calling of the preset channel is conducted as follows Select the channel by pressing Fl and F2 The channel number and value of field intensity of the preset channel will be showed in the left lower part of the screen in the numerical form There are altogether 3 channels on the screen in which the preset channels can be stored Press up and down key to adjust the channel and press the channel key again to store the chann
18. on the measuring instrument are clear and precise and the large screen figure monitor is very convenient to measure the main technical targets of CATV system It has the functions such as the single channel multi channel band scanning difference carrying measurement signal to noise ratio SNR S N measurement FM demodulation output and spectrum analysis frequency analysis etc 1 2 Introduction to the panel 1 Radio Frequency Input Terminal This terminal is changeable User can change its type to type BNC or F according to personal need 2 LCD liquid crystal display Screen can display multiple User Manual of Digital Signal Level Meter parameters according to the selected function It has a LED background light The contrast ratio can be automatically adjusted according to different environments 3 Function Keys Function keys consist of F1 F2 F3 and F4 these four keys their functions may vary according to content displayed on the screen 4 Number Keys Number keys consist of 0 9 these 10 keys which is convenient for the entry of the channel or frequency 0 key is a shortcut key for setting the channel under the mode of single channel level measurement 5 Multi function keys Multi function keys are decimal point key and clear key C under number entry mode 6 Up and Down keys 7 Channel key 8 Frequency key 9 Setup key 10 Power Key 11 Speaker 12 Accumulator Charging Socket The c
19. responding visual carrier frequency will be displayed at the upper right comer of the screen in case the current frequency is not included in the channel plan will be displayed in the channel position at 27 User Manual of Digital Signal Level Meter the upper left corner of the screen Continually press flashing under frequency measurement mode to change the progressive interval of frequency the interval will change circularly in the order of 10 KHz 100KHz 1MHz 10MHz and 100MHz Press the 0 key to set the parameters of this channel Press F1 to enter the C N measurement mode of this channel user can refer to section 3 7 3 3 Frequency spectrum measurement Press the frequency spectrum measurement soft key and the enter key to enter the single point frequency spectrum measurement status as shown in Fig 3 3 28 User Manual of Digital Signal Level Meter Fig 3 3 The four icons on the soft keys at the bottom of the screen correspond to FI F2 and F4 with the following functions respectively Fl enlarging the frequency spectrum F2 reducing the frequency spectrum file storage F4 returning to the previous picture 3 3 1 Screen band width adjustment Press F1 or F2 to enlarge or reduce the spectrum that is to adjust the band width displayed on the screen Press up and down key to adjust the band width displayed on the screen The adjustment range is 50 MHz 100 MHz and 500 MHz 29
20. rging socket at the bottom of the instrument another terminal of the battery charger should be inserted in the alternative current 220V power source socket there is an indicator light on the instrument panel if the indicator light turns red it shows that the battery charger is switched on with the power source and instrument the instrument is being charged The users can charge up the instrument under the starting and shutdown state 4 It takes about 8 hours to charge up the power source of the instrument batteries and then shutdown after charging up please pull out the battery charger plug of the instrument please properly take care of the battery charger so 38 User Manual of Digital Signal Level Meter as to be in reserve for charging up the batteries Because the instrument needs a specially made charger for recharging user must use the attached charger to charge this instrument Our company won t be responsible for the maintenance work or compensation for the losses and damage arising from the use of other rechargers 39 User Manual of Digital Signal Level Meter 5 Technical Data Channel frequency index Frequency scope 5 48MHz 870MHz Channel scope Chinese standard channel 1CH 56CH Additional Channel Z1CH Z43CH Frequency resolving power 10KHz Measurement band width 280KHz Level measurement Measurement scope 25dBuV 120dBuV Measurement precision 1 5dB Resolving power 0 1dB Detection method Peak v
21. select the probe loss as shown in Fig 2 14 LEWEL UNIT PROBE LUSS Fig 2 14 Jl or up and down key to adjust the value press F3 User Manual of Digital Signal Level Meter save the setting Press FA to return to the setting screen 2 2 8 Correct DB for Calibrating This product has been closely tested before leaving factory It has gone through restrict digital modification and already been saved in the memory unit But some measurement deviations will probably appear due to long time use or component aging This product enable user to adjust this measurement deviation Only with a standard instrument or standard signal source user can correct this product and make its measurement result more accurate This function also is suitable for user s special measurement requirement In the system setting select the correct DB as shown in Fig 2 15 User Manual of Digital Signal Level Meter CHIHA PLA eee inm Select the characters showed at the bottom of the screen and press E3 to enter next interface see Fig 2 16 fe CHIHB PLAH H CHUIG zd 2911 67 Fig 2 16 Above the screen show the channel needed to correct and its 18 User Manual of Digital Signal Level Meter corresponding frequency At the center of the screen is the signal level At the bottom of the screen indicate the current modification level and operation s
22. tatus plus or minus of signal level modification The box at front shows whether the current modification level is saved Press figure and press or button to make it happen uu uu Under this situation press and F2 button to adjust modification level The modification level at the bottom of the screen and measurement level at the center of confirm the modification level and save in the memory unit Continue to adjust the channel to be corrected to modify it until completed 2 2 9 Reset to factory mode In the system setting select the Reset to factory mode as shown in Fig 2 17 User Manual of Digital Signal Level Meter PLHH LL Fig 2 17 If user feels the setting is not ideal he she can press Reset to factory mode key Press enter the save and cancel interface press F1 jto save or cancel this setting and press F3 to confirm your choice to return to the setting screen 20 User Manual of Digital Signal Level Meter 3 Operation instructions 3 1 Signal measurement of digital channel Press the digital signal measurement soft key and the enter key to enter the digital signal measurement mode as shown in Fig 3 1 WSA STC CHES 315 20 9 om Fig 3 1 Under the digital signal measurement mode
23. tem and press the enter key CCH ENTER and the LCD screen will show as the Fig 2 3 displayed user can view and set these functions Functions include LCD contrast ratio User Manual of Digital Signal Level Meter Backlight time Shutdown time Date amp Time Volume Selecting a channel plan Editing a channel plan Creating a channel plan Level unit Probe loss Correct DB Reset to factory mode User Manual of Digital Signal Level Meter Fig 2 3 Functional soft keys are F1 UP F2 DOWN F3 Enter Key to save after selection F4 Return return to the MENU 2 2 1 The setting of backlight time User can set the automatic turnoff time for the backlight when there is no operation on the screen so as to save the energy of the instrument Press F3 to click the time and press F1 or F2 to choose the desired time push the F3 again to save the setting The selection for the backlight time is 10 seconds 20 seconds 30 seconds Always Off Always On User Manual of Digital Signal Level Meter 2 2 2 Shutdown time CHINA PLAH BACKLIGHT TIME SHUTDOWH TIME ALWAY Pah 4 Fig 2 5 User set the automatic shutdown time for the instrument order to save energy of the instrument Press F3 to click the time and press F1 F2 to choose the desired time push the F3 again to save the setting There are four selections for this setting 3 Min 5 Min 10 Min Always On
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