2. World Headquarters, Beaverton, Oregon, USA

3. Z Technology measurement systems n Address specific measurement needs acceptanceacceptance documentationdocumentation confirmationconfirmation identificationidentification resolutionresolution

4. Our television customers n Over 1800 stations are broadcasting and maintaining DTV digital plants New transmission formatsNew transmission formats New power levelsNew power levels New channel assignmentsNew channel assignments New antenna locationsNew antenna locations New government regulationsNew government regulations n Cost and people constrained

5. Antenna patterns n Not always as you would expect Horizontal Gain Vertical Angle Gain Oded Bendov / Krishna Praba, Television Engineering Handbook, Jerry Whitaker 6.5 miles from 1000’ AAT

6. DSS5800 DTV measurement system

7. DSS5800 system features n Measures multiple signals and formats n Maps signal coverage to GPS locations n Displays a full set of measured parameters n Graphs signal parameters over time n Records signal parameters to clear text files n Exports files for further analysis n Easily setup for reliable, automatic capture

8. DSS5800 DTV measurement system Programmable field strength meter 8VSB data demodulator Laptop Windows tm PC GPS Receiver Power and Distribution AC DC

9. DSS5800 DTV measurement system Programmable field strength meter 8VSB data demodulator Laptop Windows tm PC GPS Receiver Power and Distribution AC DC

10. DSS5800 DTV measurement system Programmable field strength meter 8VSB data demodulator Laptop Windows tm PC GPS Receiver Power and Distribution AC DC

11. DSS5800 DTV measurement system Programmable field strength meter 8VSB data demodulator Laptop Windows tm PC GPS Receiver Power and Distribution AC DC

12. Data is collected automatically n Analog: records all setups, time, location, direction of travel, peak power, antenna factors, frequencies, etc. n Digital: adds wideband parameters; integrated power, etc. n DTV systems add data from the digital decoder; sync/eq locks, tap values, etc. n Clear text data files are easy to read and export to other applications

13. Setup with the “Job Editor”

14. Sample the signal

15. Start data collection

16. Data files are clear-text

17. export to other applications Data is easily formatted for

18. Drive testing n Rapid accumulation of coverage data Calibrated measurement equipmentCalibrated measurement equipment 7 ft. antenna height, on roads7 ft. antenna height, on roads Automatic capture and recordingAutomatic capture and recording n Identification of problem areas Relative to previous runsRelative to previous runs Poor signal coveragePoor signal coverage Changes in coverageChanges in coverage

19. Live coverage mapping

21. Drive test considerations n Equipment configuration Antenna, Power, Mounting, CalibrationAntenna, Power, Mounting, Calibration Convenience and SafetyConvenience and Safety n Environment Location, Obstructions, ReflectionsLocation, Obstructions, Reflections n Operator interface Driver Distraction, Information DisplaysDriver Distraction, Information Displays Setup & Automatic Collection of DataSetup & Automatic Collection of Data

22. Mobile test antennas n Horizontal dipole W. K. Roberts/FCC balun designW. K. Roberts/FCC balun design 3dB beamwidth approximately 78 o3dB beamwidth approximately 78 o Magnet mount, ~24” above roofMagnet mount, ~24” above roof Cal per ANSI C63.5 w/antenna factors for dBuV/mCal per ANSI C63.5 w/antenna factors for dBuV/m n Vertical sampling antenna Mag mount 1/4 wave vertical antennaMag mount 1/4 wave vertical antenna Not true to horizontal componentNot true to horizontal component CharacterizedCharacterized

23. Multiple frequency testing n Same band, one antenna Factory antenna factorsFactory antenna factors Element length vs. frequency vs. factorElement length vs. frequency vs. factor Characterize for multiple frequenciesCharacterize for multiple frequencies n Multiple Antennas Power combinersPower combiners FiltersFilters System characterizationSystem characterization

24. Multiple antennas HP Filter LP Filter Power Combiner dBuV/m VHF UHF VHF ant correction factor + cable loss + LPF loss + Combiner loss + cable loss = VHF Antenna Factor (sys) UHF ant correction factor + cable loss + HPF loss + Combiner loss + cable loss = UHF Antenna Factor (sys) Add antenna factor plus cable loss to receiver reading in dBuV to convert to field intensity in dBuV/Meter.

25. Measurement repeatability n Equipment certification NIST traceable antennas, cables, field strength meterNIST traceable antennas, cables, field strength meter Secondary referenceSecondary reference n Equipment setup 30 ft. antenna height vs. vehicle rooftop30 ft. antenna height vs. vehicle rooftop Antenna factors recorded with dataAntenna factors recorded with data

26. The Drive Test n Set up the “job” for signal types and frequencies n Click F1 “Sample” to check the reception n Click F3 “Record Continuous” n Drive until direction changes more than ~30 degrees; stop and adjust antenna direction n Click F4 “Stop Measurements” n Take a break and look at the data

27. Analyzing the data n Real-time map plotting Colored trail of dots for any parameterColored trail of dots for any parameter Plots value as a color for each GPS location measuredPlots value as a color for each GPS location measured Color may be automatically or manually scaledColor may be automatically or manually scaled

29. Analyzing the data n Map oriented data Colored trail of dots for any parameterColored trail of dots for any parameter Tool-tip displays selected value for selected locationTool-tip displays selected value for selected location Right-click for all data taken at that locationRight-click for all data taken at that location

30. 8VSB data parameters

31. On-site testing n Problem resolution n Difficult locations n Sniff out problems n Using customer antennas n Site suitability

32. 8VSB signal w/outdoor antenna

33. DTV signal with indoor antenna

34. 3 uS (time) 38% of Main Tap Energy (voltage) Main Tap normalized To 100% 0.33 MHz (freq) 20 Log(.38)=8.4 dB 8.8 dB Example Case: One major reflection at 3 uS causes a.33 Mhz ripple on the Spectrum Display Percent Reflection (Voltage) At Cursor position (Delay) Signal Level (voltage) At Cursor Position (frequency)

35. Spectrum & S/N time plots

36. Time plots of multiple parameters

37. Low vs. full power dtv signals

38. Outdoor antenna not much help

39. RF signal measurement products n Systems designed to meet specific industry needs digital and analog RF field strength measurementsdigital and analog RF field strength measurements automatic signal coverage mappingautomatic signal coverage mapping 8VSB/DVB-T demodulated data analysis8VSB/DVB-T demodulated data analysis

40. Portable test systems Custom DesignCustom Design –Telescopic Masts –Log Periodic Antennas –Compass for Antenna Pointing –Manual or Electric Rotation –Rack-mount Packages –12VDC or AC Mains Operation

41. Learn more about our systems Z Technology, Inc. 14950 NW Greenbrier Parkway Beaverton, Oregon 97006 USA Tel: 503.614.9800 Fax: 503.614.9898 www.ztechnology.comsales@ztechnology.com NAB Contacts: John Purdy, Jim Zook John Purdy, Jim Zook