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IT-14

DVB-T SIGNAL ANALYZER

OPERATING MANUAL

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Summary of Contents for IT-14

Page 1: ...IT 14 DVB T SIGNAL ANALYZER OPERATING MANUAL...

Page 2: ...2 22 04 2011...

Page 3: ...3 1 General information 9 4 3 2 LEVEL measurement mode 10 4 3 3 SCAN measurement mode 12 4 3 4 RIPPLE measurement mode 13 4 3 5 SPECTRUM measurement mode 14 4 3 6 MER BER measurement mode 14 4 3 7 CON...

Page 4: ...read the related documentation to get acquainted with all the safety markings and instructions before you start to operate the Analyzer WARNING Only trained service personnel aware of the hazards inv...

Page 5: ...ing conditions a ambient temperature 23 5 b relative air humidity 55 25 c atmospheric pressure 84 106 kPa 630 795 mm Hg d voltage transients correspond to installation category CAT II Rated operating...

Page 6: ...M64 Subcarriers number 2k 4k 8k Guard interval 1 32 1 16 1 8 1 4 Hierarchical modulation type 1 2 4 Code rate 1 2 2 3 3 4 5 6 7 8 Operating channel power range 60 to 110 dB V MER measurement range for...

Page 7: ...meters measurement is the numeric values of the measured digital parameters MER bit error ratio BER before and after Viterbi decoder and erroneous packets counter after Reed Solomon decoder The conste...

Page 8: ...ltages either from battery or from an external power source 2 5 3 Component arrangement The IT 14 is implemented in plastic shockproof sectional housing that includes printed and three dimensional wir...

Page 9: ...referred to as Main menu 4 3 Measurement procedure 4 3 1 General information The Analyzer features on screen menu for selection of modes of operation The icons of the menu correspond to various funct...

Page 10: ...e Analyzer in LEVEL mode b TV channels level in SCAN mode c TV channels level ripple in RIPPLE mode d Signal spectrum in SPECTRUM mode e DVB T signal reception quality parameters in MER BER mode f DVB...

Page 11: ...n has been selected the measurement frequency will be defined by the channel plan if not it will be defined automatically by means of searching the optimal frequency within frequency offset range of m...

Page 12: ...s digital The view of the screen in the mode of signal level measurement in a frequency point is shown in Figure 4 3 7 Figure 4 3 7 In this mode V A ratio and C N ratio are not displayed as well as D...

Page 13: ...with the maximum level You can access other measurement modes using functional keys F1 key will open LEVEL measurement mode Section 4 3 2 F2 key will open RIPPLE measurement mode Section 4 3 4 F3 key...

Page 14: ...m diagram is in 55 000 MHz frequency range LCD pixel corresponds to 0 500 MHz frequency range d Spectrum diagram is in 110 000 MHz frequency range LCD pixel corresponds to 1 000 MHz frequency range Me...

Page 15: ...matically determine the channel parameters frequency offset spectrum inversion subcarriers number subcarriers modulation type guard interval and code rate If one of the channel plans has been selected...

Page 16: ...e displayed in positions 5 6 and 7 With and keys you can choose diagram quadrant for being zoomed Choosed quadrant is marked with the arrow position 2 For activating zoomed view mode press F3 button P...

Page 17: ...able The screen view is represented in the Figure 4 4 2 Figure 4 4 2 On the screen you will see the following data 1 table header line 2 selected line 3 command line with commands activated by F1 F2 a...

Page 18: ...Hz relatively to video carrier frequency b For digital channels frequency is set to central frequency of the channel Channel bandwidth is set according to channel template Section 4 7 DVB T channel pa...

Page 19: ...of available commands a F1 key to view update and check against the limit plans the selected page b F2 key to delete the selected page or clear all the page c F3 key to create a new data log page 4 4...

Page 20: ...evel for analog channel Default value 48 dBuV Available values 45 to 95 dBuV b Lev Vid Max The maximum value of video carrier level for analog channel Default value 85 dBuV Available values 45 to 95 d...

Page 21: ...rvice menu refers to this mode The setup mode allows you to modify the general parameters of the Analyzer The screen view is represented in the Figure 4 5 1 Figure 4 5 1 Choose parameter for editinig...

Page 22: ...ount when estimating the operating time of the Analyzer Program mem Firmware status This function checks the firmware status of your IT 14 If no errors detected the Ok status is displayed If an error...

Page 23: ...n to PC use USB on the front panel of your Analyzer The ItToolsTerrestrial software allows the following a measurement of video carrier level C N ratio and V A ratio for analog channels and channel po...

Page 24: ...er message on the screen that means the firmware is damaged and you should skip step d d Launch PC communication Section 4 9 4 e Launch ItToolsTerrestrial software and choose Firmware updating manager...

Page 25: ...f this does occur repeat the firmware updating once again 4 9 6 Channel template editing ItToolsTerrestrial software allow editing of the Analyzer s channel template To access channel template manager...

Page 26: ...ve inspections covering check of controls reliability of assembly and the keypad condition after the warranty period has expired and annually since then 6 TROUBLESHOOTING Defect detection The IT 14 fa...

Page 27: ...Please contact the service center 7 STORAGE Store your IT 14 under the following conditions environment temperature from 20 to 40 relative humidity up to 90 at 30 8 TRANSPORTATION The IT 14 must be sh...

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