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1. point 4 Figure 44 Measurement of the video carrier level A Measurement The typical values between which the video carrier level fluctuates are In the transmission line From 70 to 100 dBuV From 10 to 40 dBmV In the user s terminal From 60 to 80 dBuV From 0 to 20 dBmV B Positive Video Modulation SECAM On this type of modulation the line synchronism is defined by a minimum carrier level The maximum signal level measurement point is variable in time and it is a function of the picture that is being transmitted It could vary from 10 dB among white and black image nevertheless white signals Video Insertion Test VIT are transmitted in the sweep pulses which reduce this margin to 4 dB approximately Due to this fact and the small duration of the VIT when we measure levels of SECAM signals it is advisable to add 2 dB to the quantity showed on the display in order to obtain a more accurate measurement in its average value USER S MANUAL PROMAX 10 Premium APPENDIX B MEASUREMENT OF THE ADJACENT CHANNEL LEVEL ANALOGUE CHANNELS The user can obtain the ratio between the video carrier amplitudes of two adjacent channels Civ1 CLy2 dB 10 dB step VIDEO AUDIO VIDEO AUDIO L CHANNEL 1 L_ CHANNEL 2 Figure 45 Measurement of the adjacent channel level Differences of more than 3 dB between carriers of adjacent channels may cause problems of interference i
2. To print the stored measurement select the PRINT field previously consult section 4 3 Connecting to a computer or a printer Page 40 05 2004 USER S MANUAL PROMAX 10 Premium PROMAX 10 Premium LOGGER NUMBER 10 DATE 08 55 21 03 2004 CHANNEL PLAN CCIR AUDIO 5 50 MHz FM UNITS dBuV THRESHOLD OFF NOISE FREQ BW 2 CHAN FREQ V VA CN C23 487 25 76 14 52 C25 503 25 53 9 33 C27 519 25 81 16 55 C29 535 25 59 13 39 C31 551 25 78 16 44 C34 575 25 67 11 45 C37 599 25 54 7 34 C38 607 25 57 14 gt 37 C39 615 25 62 18 gt 42 C41 631 25 71 14 43 C43 647 25D 43 13 C14 70 MER 33 BER 8 8E 6 Figure 42 Example of print 4 2 6 1 Datalogger configuration From the LOGGER mode when LOGGER CONFIG pressing the CONFIG key 14 we will accede CONFIG THRESHOLD OFF to the configuration menu This menu permits MODE AW CH MER EER to modify the THRESHOLD and MEASURES parameters To accede to them turn the rotary selector and once the parameter we want to change is appears shadowed press it then turning it its Figure 4 3 Logger configuration menu value will be modified Finally press it again to validate the new value a THRESHOLD It activates deactivates the measurement threshold This parameter allows to carry out the logger function in an agile way by activating only those measures we consider significative In the OFF mode deactivated all measurements are taken with a level higher than 20 dBuV On
3. If PRINT function is selected data will be dumped to the remote unit through the serial port The communication parameters used by the PROMAX 10 Premium and which therefore must be defined on the remote unit PC or printer are the following Rate 19200 bauds Data bits 8 bits Parity None Stop bits 1 Page 42 05 2004 MAX USER S MANUAL PROMAX 10 Premium The remote control software RM 010 optional accessory permits to carry out from a computer the following options 1 CHANNELS PLAN PROCESSOR Modify add or delete channel plans 2 CONFIGURATION Permits to modify all the configuration parameters 3 DATALOGGER Permits to edit and to save all the measurement contained in a logger 4 UPDATE Allows to update the PROMAX 10 Premium software version USER S MANUAL PROMAX 10 Premium 5 MAINTENANCE A This part of the manual describes the maintenance procedures and the location of faults 5 1 Instructions for returning by mail Instruments returned for repair or calibration either within or outwit the guarantee period should be forwarded with the following information Name of the Company name of the contact person address telephone number receipt in the case of coverage under guarantee and a description of the problem or the service required 5 2 Method of maintenance The method of maintenance to be carried out by the user consists of cleaning the cover and changing the battery All other operatio
4. With the instrument stopped on having connected the external power adapter begins a cycle of fast load which duration will depend on the battery state For an empty battery this time will be of 2 5 h approximately The charge indicator of frontal panel will remain illuminated during this period On having finished the battery charge the indicator will be illuminated blinking to indicate that a maintenance charge takes place 2 With the instrument working when connecting the power adapter this one feeds the instrument and provides a maintenance charge remaining illuminated the charge indicator The MER BER measurements produce a light discharge of the battery in spite of the external power adapter being connected ATTENTION sf S When stopping the instrument is reinitiated a charge process M It is for that reason recommendable to discharge the E battery using instrument without external power adapter to make complete the charge discharge process ATTENTION The charge system of PROMAX 10 Premium incorporates a security system that does not allow the E process charge from certain temperature limit begining the maintenance charge instead a CAUTION Before using the power adapter make sure that the Figure 1 PROMAX 10 adapter is suitable for the mains voltage Premium and mains adapter connection USER S MANUAL PROMAX 10 Premium 3 1 2 Recommendations for using the battery In case o
5. 255 25MHz CCIR The display will show the level of the video carrier 80 dBuV in the previous figure and the CSO ratio accompanied by the frequency offset for which the minimum ratio has been obtained and the CTB ratio with the message Carrier OFF or Carrier ON according to the equipment has detected the absence or not of carrier The lower part of the screen shows the 4 measures made for the estimation of the CSO value USER S MANUAL PROMAX 10 Premium If the rotary selector 9 is pressed again the unit will return to the measurement screen of the video carrier V A C N paragraph 4 2 3 1 1 4 2 3 1 4 Power and C N ratio measurement of digital channels DVB C DVB T DAB When the tuned channel has been defined as EE digital by means of the Edit Channel Plan function see section 4 2 1 Global Configuration Menu a screen as Bu 8 0HHz CrN 17 dE shown in the attached figure will appear This screen DIGITAL CHANHEL shows the digital CHANNEL POWER 40 dBuvV in the example together with its related channel 2a d Be e i a 128 bandwidth BW 8 0 MHz and the Carrier Noise Figure 18 Measuring a digital ratio C N 17 dB At the bottom of the screen as channel in the case of analogue channels a bar graph represents the channel power with a resolution of 1 dB VERY IMPORTANT In order to measure digital channels correctly previously the channel must be defined as digital see Edit Channel Plan funct
6. Configuration of digital signal measurement DESCRIPTION PARAMETERS VALUES System according to country ANNEX ITU T DVB B C QAM Modulation MODULATION 16 32 64 128 256 Symbol Rate SYMBOL RATE 1 000 to 7 200 Auto or from 0 to 60 dB Attenuation ATIN Steps of 10 in 10 Channel frequency Offset AFCH From 2 00 to 2 00 MHz Remark Including the OP 010 E option otherwise the margin is from 1000 to 7000 IMPORTANT To leave the configuration menu just press the key of the operating mode you wish to access 4 2 3 2 Frequency tuning and configuration When in CHANNEL FREQUENCY operating mode pressing again the CH FR CH FR 10 key switches tuning by channel to tuning by frequency and vice versa In the tuning 4 by frequency mode the instrument becomes a receiver with a resolution of 10 kHz in the 5 to 862 GA 8a eae 126 MHz band In this mode you may tune to any signal within the band including leakage pilots telephone and communications signals To change tuning simply press the rotary selector 9 until the digit you want to change is underlined and then turn the rotary selector 9 The channel number will appear to the left of the tuning frequency as long as it corresponds to an active channel Figure 23 Level signal measurement a Measurement functions When the PROMAX 10 Premium works in frequency tuning it allows to measure the signal level being
7. Hz 120 dBuV 60 dBmV 60 V DC or RMS Reduction of the measurement range depending on the number of channels Up to 10 channels From 11 to 20 channels From 21 to 50 channels From 51 to 80 channels Readout IF bandwidth Input impedance Audible indicator Accuracy Analogue channels Digital channels 110 dBuv 107 dBuV 103 dBuV 101 dBuv Digital in dBuV dBmV or dBm and analogue through a graphic bar 1 dB resolution 230 kHz 50kHz 75Q Tone which varies with the signal level 2 dB from 0 to 40 C for negative video modulation 3 dB from 0 to 40 C for 8 MHz bandwidth channels DIGITAL SIGNALS MEASUREMENT MER Modulation error ratio Measurement range Accuracy BER Bit error rate Measured before RS decoding Measurement range Constellation Diagram Lock range Symbol rate Measurement range Datalogger Modulation type Bandwidth Frequency tuner 22 dB to 34 dB for 64 QAM 2dB 10 E 2 to 10 E 8 DVB QAM signals Annex A B C and DOCSIS Euro DOCSIS 10 dBmV to 60 dBmV 1000 to 7200 Msym s for 16 64 256 QAM For each digital channel the level and the MER can be stored BER for data dumping to printer or transfer to PC 16 32 64 128 256 QAM ITU J1 annex A C and 64 256 QAM ITU J1 annex B 8 MHz 62 5 kHz VIDEO AUDIO RATIO MEASUREMENT ANALOGUE CHANNELS Measurement Measurement range Audio subcarrier frequency Variable Accuracy Ratio of video to au
8. MER 64 QAM set decoders require better than 23 dB MER to operate To allow for system degradation a margin of at least 3 or 4 dB is preferred However QAM 256 set decoders require better than 28 dB MER to operate with margins of 3 dB at least Typically the maximum MER displayed on portable analysers is about 34 dB MER was chosen as the preferred measurement for cable TV because of it s similar to the analogue Carrier Noise C N measurement expressed in dB that most people from cable industry are familiar with USER S MANUAL PROMAX 10 Premium APPENDIX H PRINCIPLE OF QAM MODULATION THE CONSTELLATION DIAGRAM The modulation process implies to transfer the information contained in a signal to a high frequency carrier Modulation QAM in concrete uses modulation in quadrature consisting of two carriers each one of the same frequency one called I in phase and another out of phase 90 called Q quadrature Each one of them is modulated in amplitude and phase by a portion of the digital input signal The two modulated signals are combined then and they are transmitted as a single waveform The receiver only needs to invert the process for generating a digital output that can be processed to produce images or another useful information also The number of levels used in the modulation of each carrier determines the number of possible symbols and consequently the number of bits that can be transmitted in a certain bandwidth The
9. MHz and to verify if the measurement increases In case a channel has two adjacent channels for example channel D25 it is recommended to select the absolute mode and to assign to the NOISE FREQ parameter a frequency corresponding to a free channel for example between D26 and D27 Page 28 05 2004 USER S MANUAL PROMAX 10 Premium 4 2 3 1 5 Constellation Diagram representation Bit Error Rate BER and Modulation Error Ratio MER measurement in digital channels Once obtained the Power and C N ratio measurement the BER and MER measurement on tuned channel as well as the Constellation Diagram graph representation for the DVB QAM digital signal can be obtained pressing the rotary selector See appendix H Principle of QAM modulation The Constellation Diagram The PROMAX 10 Premium after some seconds for calculation will show a screen like the one of the attached figure On it besides the Constellation diagram also appears the type of QAM modulation the symbol rate SR the error rate obtained for the digital signal BER the modulation error ratio measurement MER see appendix G Measurement of the modulation digital ratio MER the represented quadrants Q1 4 and the type of detected codification MPEG2 Cc A When pressing again the rotary selector J the PROMAX 10 Premium carries out a new measurement If the selector rotary is pressed two times it is acceded again to the screen of Power
10. Rubber holster Page 6 05 2004 USER S MANUAL PROMAX 10 Premium OPTIONS OP 010 1 OP 010 2 OP 010 3 OP 010 4 OP 010 61 OP 010 E Substitute mains adapter by AL 022 Substitute mains adapter by AL 032 Substitute mains adapter by AL 042 Substitute mains adapter by AL 052 Change channel plan Carried out under request in the factory Extension of SYMBOL RATE measurement range OPTIONAL ACCESSORIES AD 055 AD 056 Cl 023 CC 208 RM 010 AT 20C F female BNC female adapter F female IEC female adapter Portable serial printer Data transfer cable to PC or printer Remote control software for PROMAX 10 Premium 20 dB attenuator USER S MANUAL PROMAX 10 Premium 2 SAFETY RULES A 2 1 x Generals Use this equipment connected only to devices or systems with their common at ground potential This equipment can be used in Over Voltage Category installations and Pollution Degree 2 environments Use the mains adapter in Over Voltage Category Il installations and Pollution Degree 1 environments It is for INDOOR USE When using some of the following accessories use only the specified ones to ensure safety Power adapter Car cigarette lighter adapter Observe all specified ratings both of supply and measurement Use this instrument under the specified environmental conditions The user is not authorised to manipulate inside the instrument Any other change on the equipment should be car
11. SCAN mode with reference line at 45 dBuv Page 22 05 2004 USER S MANUAL PROMAX 10 Premium In the case of having activated the broadband power detection function POWER MEAS gt YPWR in the configuration menu of SCAN mode See section 4 2 2 1 on the display of PROMAX 10 Premium will appear the total power level on the instrument RF input See the attached figure EPWR 45 dBm Full span CCIR 856 Figure 12 SCAN mode power This parameter indicates the total power that detection function is being transmitted by the connected coaxial cable to the PROMAX 10 Premium in the band from 5 to 862 MHz The SCAN operating mode also allows channels to be programmed for use as pilots in TILT operating mode in the forward band see section 4 2 5 TILT operating mode IMPORTANT In the SCAN operating mode all channels are considered as analogue as a consequence digital channels power must be measured always from the CHANNEL FREQUENCY operating mode 4 2 2 1 SCAN mode configuration SCAN CONFIG In the SCAN operating mode pressing the CONFIG key 14 will access the configuration menu THRESHOLD i REF LINE for this mode R HERS This menu permits to change three parameters THRESHOLD REFERENCE LINE and POWER MEASUREMENT To accede to any of them turn Figure 13 SCAN configuration menu the rotary selector 9 until it appears shaded and next press the selector then the value of the parameter will appear shaded
12. STEP CHANNEL BW NOISE FREQ AFCSO y SYMBOL RATE are changed digit by digit starting at the lowest weight Page 32 05 2004 USER S MANUAL PROMAX 10 Premium REMARK When switching from frequency to channel if the tuned frequency does not correspond to any channel the PROMAX 10 Premium will search for the channel nearest to this frequency and will stay tuned to this channel This operation may take a few moments 4 2 3 3 CHANNEL FREQUENCY mode configuration when the instrument works in channel tuning In CHANNEL FREQUENCY mode rr CONFIG AHL CH CONFIG 1 2 pressing the CONFIG key 14 will access the AUDIO HODE Fr first page of the configuration menu of the parameters AUDIO FREG 5 08 MH relative to this mode aFCH Baa MHz The parameters which may be changed and their margins are shown in the following table To change a given parameter turn the rotary selector 9 until the field is activated it will appear shadowed and then press The value of the parameter will be activated and may be changed by turning the rotary selector When the value you want appears press the rotary selector 9 to validate it Figure 26 CH FR configuration 1 2 DESCRIPTION PARAMETER VALUES Only analogue channels AUDIO MODE FM Audio FM Audio modulation AM Audio AM LV The loudspeaker emits a tone whose frequency varies according to the received signal level OFF Audio deactivation O
13. be measured differently The amount of distortion in a system is related to the total power of all of the carriers making accurate power measurements critical for optimum performance Instruments such as signal level meters that are designed to measure only analogue carriers will not accurately measure digital carriers Modulation error ratio MER used in digital systems is analogous to Signal Noise S N measurement used in analogue systems MER represents the ratio of the error power to the average power in an ideal QAM signal Ideally you should have at least 4 or 5 dB of margin from the MER where significant errors occur to allow for system degradation MER measurements are useful for early detection of non transient noise impairments such as system noise and the second and third order beats CSO and CTB This measurement takes in account not only amplitude noise but also phase noise Determining the MER of a signal is a key part of determining the margin from failure of the digital system Unlike analogue systems where you can see degradations in Carrier Noise C N performance a poor MER is not noticeable on the picture right up to the point of system failure MER is defined as follows expressed in dB RMS error magnitude 20 log dB average symbol magnitude 05 2004 Page 53 USER S MANUAL PROMAX 10 Premium RMS Error Magnitude Ideal Symbol Average Symbol Magnitude Figure 48 Modulation error ratio
14. kHz 50 kHz 10 kHz 280 kHz 140 kHz 50 kHz 10 kHz From 20 to 60 dBuV in steps of 1 dB From 5 to 100 MHz maximum Number of detected transitory in the measuring time Present detected level and maximum detected level in the time of the measurement AM FM LEVEL variable tone according to the signal level Internal speaker external headphones By external power supply By input signal connector 24 V nominal 25 V max 500 mA max Current limiter 7 2 V 1 4 Ah Graphic indication on the display Lo Approximately 3 hours 30 on off excepting measurements of MER BER Power off after approximately 10 minutes of non use By fast internal charger 13 5 W USER S MANUAL PROMAX 10 Premium Mains to charger adapter 230 V 50 60 Hz 13 5 V DC minimum EUROPE and other countries ENVIRONMENTAL CONDITIONS This equipment could be used on the following environmental conditions in these conditions the specifications could also be applied Altitude Up to 2000 metres Temperature range From 5 C to 40 C Maximum relative humidity 80 up to 31 C decreasing lineally up to 50 at 40 C MECHANICAL FEATURES Dimensions 70 W 90 on the display x 218 H x 50 D mm Weight 825 g including battery and holster 1 Under request carried out at the factory See option OP 010 61 2 Because of safety reasons the maximum input power over the entire band is limited up to 120 dBuV The equ
15. parameter as F the unit will make the measurement of noise at the frequency obtained to add to the tuning frequency channel central frequency the value defined for the NOISE FREQ parameter The PROMAX 10 Premium takes by default NOISE FREQ BW 2 0 5 MHz where BW is the channel bandwidth defined in the channel plan thus for example if it is desired to measure the C N ratio of a digital channel with a bandwidth BW of 8 MHz NOISE FREQ will take as value 4 5 MHz The Channel Frequency configuration menu paragraph 4 2 3 3 allows the user to redefine this parameter when tuning a new channel the equipment will return to assign to NOISE FREQ the default value The following figure shows that when making C N measurements in the relative method AF it is essential to bear in mind the presence of adjacent channels otherwise the noise could be confused with the signal of another channel en a A 64QAM i 64QAM y 64QAM 64QAM salvar D24 D D hhn D27 Vult BW 8 MHz Figure 20 Example of digital channels spectrum Taking as example the previous figure if we suppose that for the channels that appear in the figure it has defined a bandwidth of 8 MHz in the relative mode of measurement the PROMAX 10 Premium will take as value for NOISE FREQ 4 5 MHZ Note that this method can cause erroneous measures in the measurement of the channels D24 and D25 For D24 it is advised to configure NOISE FREQ 4 5
16. represented on a graphical bar Simultaneously this is indicated by the loudspeaker which emits a tone that varies with the measured level The access to the measurement functions from the CHANNEL FREQUENCY operation mode when the instrument operates in channel tuning or frequency tuning for the analogue or digital channels is described in the following figure USER S MANUAL PROMAX 10 Premium CH FR MODE FREQUENCY TUNING CHANNEL TUNING ANALOGUE DIGITAL ANALOGUE DIGITAL LEVEL CHANNEL CHANNEL CHANNEL CHANNEL l gt LEVEL BAR S SS ACOUSTIC INDICATOR I v ER B CONSTELLATION l I l I I I I AUDIO l DEMODULATIONJ I I I L gt l I Figure 24 Access to the measurement functions CH FR operation mode The measurements when operating in frequency tuning are identical to the described ones for the channel tuning operation See section 4 2 3 1 Channel tuning b Configuration When the PROMAX 10 Premium STi 4 works in the FREQUENCY TUNING CONFIG ANL FR CONFIG 172 operating mode pressing the CONFIG key FREQ MODE AHL 14 will access the first page of the configuration pPpREG STEF 1 48 MHz menu of the parameters relative to this mode Figure 25 CH FR configuration 1 2 USER S MANUAL PROMAX 10 Premium The parameters which may be changed and their margins are shown in the following tables To change a given parameter turn the rotary selec
17. values from 0 5 to 2 50 and from 0 5 to 2 5 MHz These parameters are modified digit to digit beginning by the one of smaller weight Finally AFCH parameter allows to set the frequency offset for the channel tuning PROMAX 10 Premium admits values from 2 00 to 2 00 MHz IMPORTANT To leave the configuration menu of the CHANNEL FREQUENCY mode just press the key of the operating mode you wish to access 4 2 4 SPECTRUM ANALYSER operating mode SPECT Pressing the key the unit switches to the SPECTRUM ANALYSER mode This function has 4 different operating modes SPECT MAX MIN and TRANS which are selectable through the spectrum mode configuration menu see section 4 2 4 5 4 2 4 1 SPECTRUM operating mode In the SPECTRUM mode the PROMAX 10 Premium provides a spectral analysis of the band the span and the reference level are variable The spectral analysis can be done in the forward band or in the return path as it is selected in the spectrum configuration menu section 4 2 4 5 this menu also allows to select the detector used for the representation of the spectrum between peak and average The marker frequency is displayed in the SPECT EREMEGIIGR 34dBul higher left hand corner of the screen 650 00 MHz 4 and to its right the frequency signal level 34 dBuV 8 To alter the marker frequency turn the rotary selector za 9 9 26555 sp eM 675 46 Figure 28 SPECT mode PROMAX USER S MAN
18. 4 dB USER S MANUAL PROMAX 10 Premium 4 2 3 1 2 Audio carrier measurement and demodulation For the PROMAX 10 Premium to demodulate an audio signal and show its 7 S characteristics level and frequency b a offset press the rotary selector 9 again re oe oe 42 In the attached figure the audio carrier level AUDIO guy Carrier is 64 dBuV and the frequency offset is 5 50 2a q0 6p MHz F It also shows if the audio whether Level FM or AM is activated a speaker appears or not no icon appears To change the audio carrier offset F and the audio modulation Level FM or AM accede to the Channel Frequency configuration menu section 4 2 3 3 255 25MHz CCIR co 168 128 Figure 15 Audio demodulation and measurement 4 2 3 1 3 CSO CTB distortion products measurement The active devices present in the distribution systems when working in its nonlinear zone generate interferent signals called distortion products that can fall within the video bandwidth From a certain level this interference becomes visible on the TV image The distortion products of greater level and which usually fall within the channel bandwidth are those of second and third order beats The CSO distortion Composite Second Order is defined as a ratio of the peak level of the video carrier to the peak of the distortion products of second order beat produced by the rest of channels The ratio is expressed in dB and can be re
19. DVB C standard allows 5 types of modulation 16 QAM 32 QAM 64 QAM 128 QAM and 256 QAM For example if four amplitude levels are applied to each one of the carriers each signal could reach the value of 3 0 1 0 1 0 3 0 at a given instant in time so we have 16 possible combinations This is known as 16 QAM Extending the previous exposition to four amplitudes it allow us to generate 8 states for each carrier and 64 possible combinations 64 QAM These digital signals can be visualized graphically by means of the Constellation Diagram If one imagines on an axis the possible states of the first carrier signal I or signal in phase we would obtain the image in figure 49 oe oe eoe o o 3 0 1 0 1 0 3 0 Figure 49 Signal I states Q 3 0 1 0 1 0 3 0 Figure 50 Signal Q states USER S MANUAL PROMAX 10 Premium Figure 50 shows the other signal Q in quadrature on a vertical axis to consider the 90 phase change Figure 51 I Q states combination Figure 51 shows the combination of these two signals This image constitutes the Constellation Diagram of the modulated digital signal Page 56 05 2004 USER S MANUAL PROMAX 10 Premium APPENDIX I FREQUENCY OFFSET ADJUSTMENT FOR TUNING ANALOGUE AND DIGITAL CHANNELS It is possible to introduce an offset of the tuning central frequency for the channels defined in each channel plan using the AFCH parameter 2 MHz Therefore it is possible to adapt
20. OMFIG 2 2 AUTO POWER OFF OFF BEEP OFF LANGUAGE EHGLISH DLHE OFF SLI Version 2 32 Figure 7 Global configuration 2 2 f AUTO POWER OFF This field permits to activate ON or deactivate OFF the POWER OFF function When this function is ON the unit automatically turns off when it has remained inactive for a period of 10 minutes g BEEP This function permits to activate ON or deactivate OFF the PROMAX 10 Premium beeper When it is on it sounds on pressing any key or when turning the rotary selector in order to alert the user Page 20 05 2004 USER S MANUAL PROMAX 10 Premium h LANGUAGE This field permits to select the language between ESPANOL FRANCAIS ENGLISH and DEUTSCH i EXTERNAL UNITS POWER SUPPLY VLNB By means of the PROMAX 10 Premium it is possible to provide the voltage necessary to feed external units MMDS antennas Multichannel Multipoint Distribution Service in case of terrestrial television without cable wireless cable by the signal input connector This voltage will have to be provided externally by the power input 4 and to be included in the margin from 21 to 25 V in opposite case the instrument will not allow to activate this function displaying the message Error VEXT at the moment of the configuration The activation or deactivation of VLNB takes place according to the described process next Press repeatedly the key CONFIG until acceding to the second screen of the configuratio
21. SPECTRUM COMFIG CONFIG REVERSE SPECT DETECTOR To change the value assigned to one REF LINE parameter turn the rotary selector 9 until its field is STOP FREG activated this will appear shadowed and then press The value of the parameter will be activated and may be changed by turning the rotary selector When the value you want appears press the rotary selector 9 to validate it Figure 36 SPECT mode configuration The parameters that can be modified through this menu are a BAND It selects the analyzed band between RETURN PATH Sub band spectrum 5 to 100 MHz FORWARD Band from 45 to 862 MHz b MODE It selects the representation mode SPECT Instantaneous value MIN Minimum values held MIN INGRESS MAX Maximum values held MAX INGRESS TRANS Transient detector Only operative in the return path c DETECTOR Only for the SPECT MAX and MIN modes It selects the used detector between PEAK AVERAGE In the TRANS mode the detector used is always PEAK d REF LINE It permits to activate deactivate and to define the reference line level in 1 dB steps from 20 to 120 dBuV dBuV units This line appears on the spectrum representation and also it is the threshold value for the impulses detection in the TRANSIENT mode only if its value is under 60 dBuV e STOP FREQ It defines the maximum frequency for the transient detection USER S MANUAL PROMAX 10 Premium IMPORTANT To leave the configurati
22. TABLE OF CONTENTS 1 GENERAL isene alia E S aia 1 TA SDOSCrPHOM isane nen aa a ESN 1 T2 Specifications eneng T 2 2 SAFE IY RU ES cxscccsi cette octeceeatesnctytuceancectacns sxtesincayeasasiaceueiniseenacseaceusistancneataceeeias 2 1 Generals i 2 2 Descriptive Examples of Over Voltage Categories 3 INSTALLATION weivaina caine eandivai a daadiied Mainland Maal 13 3 1 Power SUPPLY oirirc iisipin osiin ai aiina pipi ieiet 13 Geli Bate CAG svzsssctsiscstsssanseceatadesheahesescattes sSitsesesnsssactebasshchacsssestsheebeasscets 13 3 1 2 Recommendations for using the battery eeeceeseeseeeeeeeseeeeeeeeeeneenaes 14 3 2 Installation and Start Up c2 aisccceeccievctedi iaa aiaa riai 14 3 251 Contrast adjusttmemt sicn ne ea EERE 14 4 OPERATING INSTRUCTIONS c ccccceceeseeeeeeeeeeeeeeeeeceeesaeeeeesaeseaesaeseaesaneeaeeaeeeas 15 4 1 Description of the controls and elements ceeceeeeeeeeeeeeeeeeeeeeeeteeeeeneenaees 15 4 2 Operating INStrUCtionS viscccvise fesieecssehide devigecineigceesses seve kiii aerisire 17 4 2 1 Global Configuration MENU cc eeceeeeeneeeeeeeeeeeeeeeeneeeaeeeaeeseeeseneseateeaeeaes 19 4 2 2 SCAN operating MOE eee eeceeeceeeneceneeeeeeeeneeeaeeeeeeaeeseeeeeaeeseeseeeeeaeeaee 22 4 2 2 1 SCAN mode Configuration ecceeeeeceeeeeseneeeneeeneeeneeeeeeseeeeaeeeneeeaes 23 4 2 3 CHANNEL FREQUENCY operating MOde c ceecceeceeeeeeereeeneee
23. UAL PROMAX 10 Premium By pressing the rotary selector 9 you I can alter the span between 1MHz and lt V 100 MHz SPECT 656 68MH2 S4dBul Frequency tuning resolution varies according to the span selected as shown in the following table Figure 29 SPECT mode span reduction FREQUENCY DETECTOR SPAN RESOLUTION PEAK 100 MHz full span in the 900 kHz return path 50 MHz 450 kHz 30 MHz 275 kHz 15 MHz 135 kHz 5 MHz 45 kHz 1 MHz 10 kHz AVERAGE 30 MHz 280 kHz 15 MHz 140 kHz 5 MHz 50 kHz 1 MHz 10 kHz L Kam SPECT E5 aarHz 34dBul By pressing the rotary selector 9 again the reference level may be modified Pressing the rotary selector 9 a second time will activate the tuning frequency field of the marker 15 MHz bot being possible to tune new frequencies Figure 30 Reference level modification The attached figure shows an horizontal line at SPECT 658 e 8HMHz 65dEul 45 dBuV This line allows to identify levels over a ea ng reference of our interest easily The activation and 58 definition of this reference line is carried out on the spectrum analyser configuration menu F 26525 sp SOMHz 675 Figure 31 Reference line 4 2 4 2 MAX operating mode The SPECTRUM operating mode also permits to be configured as maximum hold MAXIMUM INGRESS This option is selected on the Spectrum Configuration menu section 4 2 4 5 In t
24. YSER and the TRANSIENT DETECTOR operating modes 13 Page 16 05 2004 AX USER S MANUAL PROMAX 10 Premium 14 CONFIG Access to CONFIGURATION menus specific to each operating mode and to the global configuration menu of the unit LOGGER Selects the DATALOGGER operating mode Enables multiple measurements to be taken visualised printed or transferred to a PC automatically T On Off key 15 17 LNB exterrnal supply indicator 18 Battery charge indicator 4 2 CH FR LOGGER SCAN E PECT Operating instructions The PROMAX 10 Premium has 6 independent operating modes The CHANNEL FREQUENCY operating mode measures the video carrier level the Carrier Noise ratio C N the Video Audio ratio V A and activates audio carrier demodulation for analogue channels as well as measuring the channel power and the Carrier Noise ratio C N the Bit Error rate BER and the Modulation Error ratio MER and represent the Constellation Diagram for digital channels It also permits to measure the CSO and CTB intermodulation distortion The DATALOGGER operating mode enables multiple measurements to be performed and memorised for subsequent checking transfer to PC or printing It can perform and store up to 55 obtained measurements or loggers in the memory Each logger carries out level C N V A channel power or MER measurements on the channels activated in the channel plan up to a maximum of 140 channel
25. and C N ratio measurement section 4 2 3 1 4 Figure 21 Constellation Diagram representation and BER and MER measurement in a digital channel When pressing the CH FR 10 from Q1 4 graphical representation in four quadrants goes to only a quadrant e g Q1 pressing again CH FR 10 obtains an extended representation zooming x4 e g Q1 Z Press CH FR 10 to return afresh to the Q1 4 mode In order to change the quadrant from Q1 4 press and keep pressed the CH FR 10 key until a quadrant frame selector will appear and slide it by means of the rotary selector 9 locate it in the wished quadrant and finally loose the CH FR 10 to set the new quadrant for representing 4 2 3 1 6 Configuration of QAM signal measurement using edit channel plan From the edit channel plan it s possible to access directly to the following page of the configuration menu of the parameters relative to this mode for the tuned channel USER S MANUAL PROMAX 10 Premium The parameters which may be changed and their margins are shown in the CONFIG following table To change a given parameter turn the rotary selector 9 until the field is GNHE ITU T activated it will appear shadowed and then press ilNmiN ESnaia s The value of the parameter will be activated and may be changed by turning the rotary selector When the value you want appears press the rotary selector 9 to validate it QAH COHFIG C21 474 86 MHz CCIR Figure 22
26. and turning the selector you will be able to modify its value Finally to validate the new value press the rotary selector 9 again a THRESHOLD It defines the minimum level to show channel on the display OFF or between 21 and 120 dBuV If the threshold is deactivated OFF on the SCAN representation will appear all the active channels of the channel plan with a level higher than 20 dBuV Otherwise if we define a level for the THRESHOLD parameter channels with a level lower than the threshold value will not be displayed b REFERENCE LINE It permits to activate or to deactivate OFF a reference line on the SCAN graph between 21 and 120 dBuV This reference line allows to establish judgements of channel level acceptance just with a glance at the SCAN screen c POWER MEASUREMENT It allows to define if the measurement of the power is carried out on the channel bandwidth CHAN indicates by the MARKER or over the full band between 5 and 862 MHz PWR USER S MANUAL PROMAX 10 Premium IMPORTANT To leave the SCAN operating mode configuration menu just press the key of the operating mode you wish to access 4 2 3 CHANNEL FREQUENCY operating mode The CHANNEL FREQUENCY operating mode provides the following measurements Analogue channels Video carrier level Carrier Noise C N ratio Video Audio V A ratio CSO CTB intermodulation distortion measurement Digital channels Channel power by measurements integ
27. as BWx S5mhZ BWx C Naw C New C Nsunz 10lo8 igg O Neromax 10 1Olog That is to say the factor 10 log BWx 5 MHz should be subtracted to the PROMAX 10 Premium readout There exist some standards that determine the minimum C N value for an installation In general greater values than 40 dB are considered as good quality signals Under 40 dB snow should appear on the TV screen Page 50 05 2004 USER S MANUAL PROMAX 10 Premium APPENDIX E CARRIER NOISE RATIO MEASUREMENT C N C N Measuring Range dB C N Measuring Range dB Example C N 63 7 61 4 56 7 45 43 a ANALOGUE CHANNELS Qutside the measuring range Accuracy 2dB T T T T T T d 0 10 25 35 45 55 dBmV 60 70 85 95 105 115 dBW Video carrier level DIGITAL CHANNELS Outside the measuring range 7 Accuracy 2dB gt I I I I I 0 10 20 30 40 dBmV 60 70 80 90 100 dBuV Video carrier level Figure 47 C N ratio measuring range Suppose that the video carrier level for an analogue channel is of 10 dBmV from the diagram we can deduce that the measurement range is of 48 dB Thus if when we carry out the measurement the C N ratio is 54 dB the display will show C N gt 48 dB On the other hand if C N 42 dB we will see on the display C N 42 dB USER S MANUAL PROMAX 10 Premium APPENDIX F CARRIER TO NOISE RATIO FOR 64 QAM DIGITAL CHANNELS C N For a 64 QAM DBV C digita
28. ccess to this operating mode press the SCAN key 11 The top line of the SCAN screen will display the channel name C44 the tuned frequency 655 25 MHz and the level 65 dBuV of the channel the marker is over The marker can be moved by turning the rotary selector 9 655 25MHz 65dEuV Full span CCIR S56 Figure 8 SCAN mode full span The channel is selected when it is shaded To change the span shown __ bandwidth press the rotary selector 9 he C gt span field is activated and then turn it The span is variable from the entire band full span to 10 MHz in the following steps C44 650 25MHz 6SdBul 10 30 100 300 MHz y full span Figure 9 SCAN mode span 100 MHz By pressing the rotary selector 9 again you can change the reference level lt X gt in other words on turning the rotary selecter 9 the graph is displaced vertically C44 6S5 25MH2 6 odBul 8505 5p 180 MHe COIR 85 To modify the tuned channel press the rotary Figure 10 SCAN mode selector 9 again the channel field will be activited and Ref 90 dBuV then turning the rotary selector you will be able to change it The attached figure shows an horizontal line at C44 655 25MH 65dBul 45 dBuvV This line allows to establish judgements of a Celine ae channel level acceptance easily To activate and define this reference line see the Scan configuration menu section 4 2 2 1 Full span CCIR 56 Figure 11
29. ctivate it it appears a cross or to deactivate it it does not appear a cross By means of the Edit Channel Plan function also it is possible to define channels as analogue or digital To do this turn the rotary selector 9 until the channel that you wish to modify appears shaded and then press it twice the cursor will jump to the DIG column then turning the selector it will be possible to define it as digital appears a cross channel C04 in the example of the previous figure or as analogue it does not appear a cross In the case of selecting it as digital it is possible to accede directly to the digital channel configuration In order to return to the Edit Channel Plan function press the CONFIG 14 key To modify the rest of characteristics of the channel plans it is necessary to have the RM 010 software optional accessory c UNITS The PROMAX 10 Premium permits to select the level units between dBmV dBuV and dBm d TIME To enter the time select the TIME field and press the rotary selector Firstly turn the rotary selector to change the minutes field Next press the selector again to modify the hours and finally press it once again to confirm the new time e DATE To enter the date select the DATE field and press the rotary selector First change the year field then the month and finally the day The parameters which may be modified on the second page of the global configuration menu of the unit are as follows GLOBAL C
30. d one FREQ the associated frequency in MHz The third column BW defines channel bandwidth in MHz The fourth column ON activates or deactivates the channel and the fifth ones DIG defines if the channel is analogue or digital cc CH AL Cu Ce Cu 38 SA Figura 6 Editing a channel plan In the case of defining the channel as digital the configuration page of parameters relative to QAM measurement will be accessed directly see section 4 2 3 1 6 The maximum number of channels in a channel plan is of 140 The activation ON deactivation OFF of the channels affects to the following operation modes CH FR SCAN and DATALOGGER When a channel has been deactivated this one will not be able to be tuned nor to be measured This property allows to make agile the operation of the PROMAX 10 Premium because it allows to activate only those channels in which we are interested USER S MANUAL PROMAX 10 Premium The Edit Channel Plan function allows to automatically activate all the channels defined in the channel plan by means of the ALL field on the third line When to the right of ALL we select ON all the channels of the plan will be activated otherwise if we select OFF all channels will be deactivated In order to activate deactivate a particular channel turn the rotary selector 9 until this one appears shaded and then press it the cursor will jump to the ON column then turning the selector it will be possible to a
31. dified through the configuration menu associated to the mode In order to accede to the configuration menu associated to a particular operating mode simply press the CONFIG key 14 Some modes have more than one configuration page to accede to the second page it is necessary to press the CONFIG key again The general parameters of configuration selecting editing the channel plan measurement units language etc can be changed through the Global Configuration Menu to which it is acceded by pressing again the CONFIG key 14 To leave a configuration menu just press the key of the operating mode you wish to accede N C44 655 25MHz G5dBul SCAH CONFIG B THRESHOLD A OFF POWER MEAS CONFIG GLOBAL COMFIG 172 CHAHHEL PLAH CCIR N EDIT CHAHHEL PLAH UHITS dBu f 12 45 21 03 2004 LAHGUAGE Sid TIME DATE ces 855 25MHz CCIR CH FR CONFIG 1 2 WIDEO Carrier 88 dull elf auno mone FM WA 16 dB ER 5 50 MHz BOs CeN 54 dB HHEL 8 6 MHz a FREG 4 IN CH CONFIG 26046 Ea SA dea iza OE F Version 2 52 B il 6 50 MHz 6 06 MHz TILT eee LOGGER Figure 4 PROMAX 10 Premium configuration menus Page 18 05 2004 USER S MANUAL PROMAX 10 Premium 4 2 1 Global configuration menu In order to accede to the global f GLOBAL COMFIG 172 configuration menu from any operating CONFIG CHAHHEL PLAH CCIR EDIT CHAHHEL PLAH UHITS mode SCAN CH FR SPECT etc
32. dio carrier levels From 0 to 40 dB 4 9 MHz 2 dB from 5 to 40 C for FM audio carrier Including the OP 010 E option otherwise the margin is from 1000 to 7000 USER S MANUAL PROMAX 10 Premium CARRIER NOISE RATIO MEASUREMENT Measurement Analogue channels Digital channels Measurement range Analogue channels Digital channels Accuracy Ratio between carrier level and the channel s noise level Ratio between the channel power and the noise level The frequency where noise is measured is user definable in absolute or relative value In the relative mode the unit takes as default frequency offset the value BW 2 0 5 MHz 40 50 dB for input level between 60 and 70 dBuV gt 50 dB for input level gt 70 dBuV gt 30 dB for input level gt 60 dBuV 2 dB 45 862 MHz 3 dB 5 45 MHz CSO amp CTB INTERMODULATION PRODUCTS MEASUREMENT ANALOGUE CHANNELS cso Measuring frequencies CTB DATALOGGER FUNCTION Max number of loggers Number of channels logger Measurements Analogue channels Digital channels SCAN Span Power detection Reference level TILT Indication Analysed band Number of pilots Pilots frequency Pilots resolution Page 4 Ratio of the peak level of the video carrier to the peak of the distortion products of second order beat Measured at four frequencies user definable User definable from 2 50 to 0 50 MHz and from 0 50 to 2 50 MHz Default va
33. eeeeeeeeteeeeeaeeeeeeseeereneeees 39 4 2 6 1 Datalogger Configuration c eeceeseeseeeseeeneeseeeeeeeeeeeeeeeeeeeeeeeeeeeaes 41 4 3 Connection to a Computer or Printer ssssssssessesresiesiserieiesiisiierisrrsrrnsiresrnerees 42 USER S MANUAL PROMAX 10 Premium CABLE TV ANALYSER PROMAX 10 Premium 1 GENERAL 1 1 Description The PROMAX 10 Premium is seven functions in one instrument Level Meter Datalogger Scan Tilt Spectrum Analyser Transient Detector and Cable Digital Analyser which makes it an excellent tool for the installation and maintenance of analogue and digital television signal reception distribution systems working in the 5 to 862 MHz range which includes FM radio community TV systems MATV cable TV CATV and wireless cable TV MMDS including the sub band return path The PROMAX 10 Premium incorporates the power level measurement function in the whole frequency band very useful to check a possible input saturation of some broadband demodulators As a Level Meter the PROMAX 10 Premium enables the following measurements Analogue channels Video carrier level measurement Carrier Noise ratio measurement C N Video Audio ratio measurement V A CSO and CTB Intermodulation distortion measurement Digital channels DVB C DVB T and DAB Channel power measurement by integration Carrier Noise ratio measurement C N Bit Error Rate BER measurement Modulation Error Ratio MER meas
34. essage CONTRAST ADJUSTMENT Turn the rotary selector then turning the rotary selector 9 it is possible to adjust the display contrast to get the best viewing according to working conditions The new contrast value is held when the unit is turned off and when battery is removed Page 14 05 2004 PROMAX USER S MANUAL PROMAX 10 Premium 4 OPERATING INSTRUCTIONS 4 1 Description of the controls and elements Front panel CABLE TV ANALYSER A Promax C44 6S5 25MHz Gad Bl r AA 54 46 Full span CCIR 856 a LOGGER CONFIG SPECT Ving PROMAX 10 Premium Figure 2 Front panel 1 F F or F BNC or F IEC adapter Maximum input voltage level 60 VAC rms 50 60 Hz 2 F male base connector 3 Graphic display with back lighting 4 DC power adapter external input 5 Volume control 6 Keyboard 7 keys for function selection USER S MANUAL PROMAX 10 Premium 7 Loudspeaker 8 Connection to computer or printer CC 208 specific connection cable Do not connect any cable other than that supplied by the manufacturer otherwise the instrument may suffer serious 9 Figure 3 PROMAX 10 Premium keyboard CH F Selects the CHANNEL FREQUENCY operating mode A 10 SCAN elects the SCAN operating mode 11 n TILT elects the TILT operating mode 12 n SPECT Selects the SPECTRUM ANAL
35. f anticipating a long period of inactivity for the equipment it is recommended to store it with the battery discharged When the equipment starts the operation after a long period of inactivity to follow next steps e Put to charge the instrument with the external adapter e f it starts on the maintenance mode indicator flashing wait for the pass to the charging mode indicator lighting permanently e Start up the equipment assuring that the function AUTO POWER OFF is OFF the indicator will stand permanently lighted and it will stay in this condition during a period of time about 10 to 14 hours Use the equipment in normal way reason why after one to three whole cycles of charge discharge depending on the time and temperature of inactivity the battery will have been reconditioned 3 2 Installation and start up The PROMAX 10 Premium has been designed for use as portable equipment A fully charged battery can power the equipment for more than three hours Lt When the low battery indicator appears on the display recharged the battery must be When a fully discharged battery is installed it is possible that due to residual charges the PROMAX 10 Premium may start up In this case the instrument will automatically disconnect before the low battery indicator appears on the display 3 2 1 Contrast adjustment When turning on the PROMAX 10 Premium if the on off key 16 is held pushed on the display will appear the m
36. he MAX mode the PROMAX 10 Premium holds on the screen the maximum measured level through a dotted line MAX EBERLE S4d6uy 68 Figure 32 MAX mode A PROMAX USER S MANUAL PROMAX 10 Premium This measurement is used to be carried out on the return path and permits to detect intermittent interferences Since on this operation mode the PROMAX 10 Premium holds on the screen the maximum measured value through a dotted line after making several measurements over the band it will be possible to detect impulsive type interferences It is advised to previously define a reference line which actuates as a maximum noise threshold 30 dBuV on previous figure 4 2 4 3 MIN operating mode This measurement permits to detect permanent channel interferences that in an other way could remain masked because of the variable nature of the signal It is interesting in analogue channel measurements as well as in digital channel To select this representation mode you must select the MIN mode MINIMUM INGRESS see section 4 2 4 5 Spectrum mode configuration menu In this operating mode it is advised to select the Average detector see section 4 2 4 5 Spectrum mode configuration menu 15 MHz Figure 33 MIN mode First scan Figure 34 After several scans Previous figures show an example of this measurement over a digital channel Left figure corresponds to the first sweep After several sweeps right figure an interference is seen a
37. ion at section 4 2 1 Unit Global Configuration and if necessary the CHANNEL BW parameter should be redefined by means of the Channel Frequency configuration menu When a channel has been defined as digital the PROMAX 10 Premium tunes it at its central frequency Digital channels power measurement is carried out by means of an integration method The PROMAX 10 Premium divides the bandwidth of the channel CHANNEL BW in sections of 230 kHz 4 by each MHz approximately and measures the contribution of each one to the total power of the channel This way a very exact measurement is obtained specially in the case of degraded channels because the channel flatness is had in consideration 230 kHz F cm BW CANAL CHANNEL BW BP CANAL Figure 19 Measuring the power of a digital channel by integration The C N ratio measurement shows the ratio between the digital channel power and the noise power The user can define the frequency where the noise power must be measured Two possibilities exist USER S MANUAL PROMAX 10 Premium I Absolute method Selecting in the Channel Frequency configuration menu the NOISE MODE parameter as FREQ the equipment will interpret the NOISE FREQ value as the frequency where the noise power measurement must be done Naturally the user must be sure that the NOISE FREQ value corresponds with a free channel Il Relative method Selecting in the Channel Frequency configuration menu the NOISE MODE
38. ivalent power level for a group of channels of similar levels is related with the input power level over the entire band according to the following expression Ly L 10 log N Ly total level L mean level of one channel N number of channels present For higher input power levels the use of an external attenuator of 20 dB is recommended There may be certain frequencies where the symbol lt appears at levels higher than 25 dBuV maximum 28 dB This is due to the automatic correction of the frequency response The value measured remains correct although the accuracy becomes 3 dB 3 For the positive video modulation L standard it can vary from 0 to 2 dB among white and black image 4 For the AM audio carrier L standard it can vary from 0 to 3 dB below the V A value 5 See appendix E INCLUDED ACCESSORIES AL 012 EUROPE and other countries 230 V 50 60 Hz mains adapter basic version only AL 022 USA and CANADA 120 V 50 60 Hz mains adapter only with the OPT 010 1 AL 032 UK 230 V 50 60 Hz mains adapter only with the OP 010 2 AL 042 Australia 240 V 50 60 Hz mains adapter only with the OP 010 3 AL 052 Japan 100 V 50 60 Hz mains adapter only with the OP 010 4 AA 012 Car cigarette lighter adapter cable DC 239 PROMAX 10 Premium Carrying case DC 286 Carrier belt AD 057 F female F female input adapter AD 058 F male F female rapid adapter CC 030 F male F male 1m coaxial cable DC 284
39. l signal with a bandwidth of 8 MHz the C N ratio must be better than 20 dB Measurements lower than this value will correspond to signals with a no acceptable quality Justification and example The basic parameter which describes the quality of a digital signal is the ratio of the number of erroneous bits to the total number of bits transmitted This parameter is known as BER Bit Error Rate The DBV Group Digital Video Broadcasting defines a quasi error free transmission ETR290 Measurements Group ETR 290 as that with less than 1 error event per transmission hour For a 64 QAM DBV C transmission the pre FEC error Forward Error Correction must be lt 1 E 4 In digital transmissions as there is not one carrier it is better to speak in Eb No terms The relation between Eb No and the C N is given by the following equation E logs M C N dB gt dB 10 log R dB No dB g Rs BW Where Eb Energy per bit No Noise power ina 1 Hz bandwidth Rs Symbol rate M Number of points of the constellation BW Bandwidth For DVB C 64 QAM Rs 6 875 Mbaud BW 8 MHz C N dB E Ng dB 7 12 For a BER of 1E 4 Ep No 16 dB Therefore C N 23 dB Page 52 05 2004 USER S MANUAL PROMAX 10 Premium APPENDIX G MEASUREMENT OF THE MODULATION ERROR RATIO MER Analogue and digital carriers are very different in terms of the signal content and the power distribution over the channel Therefore need to
40. lues 1 50 0 50 0 50 and 1 50 MHz Ratio of the peak level of the video carrier to the peak of the distortion products of third order beat Measured at the carrier frequency or approximately mode in a channel previously defined by the user 55 140 Level C N and V A Channel power and MER BER for data dumping to printer or transfer to PC Variable 10 30 100 300 MHz and full band from 5 to 862 MHz according to the channel plan Forward band 45 to 862 MHz Variable from 60 to 120 dBuV in 10 dB steps Numerical and by level bar Forward 45 to 862 MHz or Return path 5 to 100 MHz 4 per band From 5 to 862 MHz 10 kHz 05 2004 USER S MANUAL PROMAX 10 Premium SPECTRUM ANALYSER Span Reference level Analysed band Detector Bandwidth Resolution Peak detector Span 100 MHz Span 50 MHz Span 30 MHz Span 15 MHz Span 5 MHz Span 1 MHz Average detector Span 30 MHz Span 15 MHz Span 5 MHz Span 1 MHz TRANSIENT DETECTOR Detection threshold Detection range Readout AUDIO Demodulation Output POWER SUPPLY LNB Input Output Voltage Current Protection POWER SUPPLY NiMh battery Low battery indication Autonomy Automatic power off Battery charge Equipment consumption From 1 to 100 MHz 1 5 15 30 50 100 MHz Variable from 60 to 120 dBuV in 10 dB steps Forward 45 to 862 MHz or Return path 5 to 100 MHz Peak or average 230 kHz 900 kHz 450 kHz 280 kHz 140
41. n menu Turn the rotary selector until appears shaded line VLNB Press the rotary selector to activate the selection Turning the rotary selector this one goes successively of OFF to ON Finally to press the rotary selector to activate the configuration changes When surpassing the maximum LNB current consumption the output feeding will be deactivated and LED VLNB from frontal will blink during a minute In order to reactivate again the LNB voltage after solving the cause of malfuction it must be access again to the instrument configuration according to the sequence previously described ATTENTION Before using the LNB feeding function make sure of absence of other power supplies in the measurement power supply connector like DC AC voltages The entrance of external voltages when trying to feed from the PROMAX 10 Premium can produce damages in the implied equipment IMPORTANT To leave the global configuration menu just press the key of the operating mode you wish to accede The lower line of the screen shows the version of the unit control software 2 32 in previous figure USER S MANUAL PROMAX 10 Premium 4 2 2 SCAN operating mode The SCAN operating mode shows in a single screen the signal level of all the active channels in the channel plan by means of a bar graph In addition the exact level of any particular channel may be measured by simply placing the marker over it only analogue channels To a
42. n reception Page 48 05 2004 USER S MANUAL PROMAX 10 Premium APPENDIX C MEASUREMENT OF THE VIDEO AUDIO RATIO ANALOGUE CHANNELS V A V A dB It permits to measure the ratio between the video carrier and the audio carrier amplitudes Although this process depends on the standard used it is usual to consider that a properly transmitted PAL channel should have a sound subcarrier 13 dB below the video carrier 10 dB step 10 to 15 cB C C VL AL Figure 46 Video Audio ratio measurement These specifications ensure that there is no interference in the same or the adjacent channel USER S MANUAL PROMAX 10 Premium APPENDIX D CARRIER TO NOISE RATIO C N ANALOGUE CHANNELS The Carrier to Noise ratio is a signal quality measurement The noise power depends on the measurement filter bandwidth in analogue TV it is usual to refer the noise level to a bandwidth of 5 MHz this is the case of the PROMAX 10 Premium If it is desired to know the C N measurement for a different bandwidth BWx the following correction should be applied Starting from the C N definition C Ngw C Neaw where C Video carrier level Newx Noise power referred to a BWx measurement bandwidth and as the noise power referred to BWx could be related with the noise power referred to 5 MHz according to BWy 5MHz New Nemuz 10log the C N ratio referred to a noise measurement bandwidth BWx should be expressed
43. nd the frequency offset for the noise measure of the digital channels C N ratio will correspond with the configuration of the equipment at the time of carrying out the measurement To return to the initial menu of the LOGGER function press the LOGGER key To check the measurements stored in a specific logger select the VIEW option The first line shows the channel plan CCIR in the example the audio carrier offset 5 50 MHz the audio demodulation FM and the units of measurement dBuV The second line shows the logger number 53 in the attached figure and the headings of the measurements V V A and C N The measurements taken are shown in the following format first column shows the channel the D indication on its right means it has been defined as digital see Edit Channel Plan function at section 4 2 1 Global configuration menu the second column shows the level analogue channels or the channel power digital channels the third the V A ratio analogue channels an the fourth the C N ratio analogue channels or MER digital channels Turning the rotary selector 9 you can see the rest of channels R_5 58 FM dBull ao OW UA c L C C C 5 5 5 DHATA Clb fe Pe Figure 41 Viewing a logger The time and date when measurements were taken appear at the end of the list of measurements in the following order hour minute second and month day year To return to the initial menu of the LOGGER FUNCTION press LOGGER key
44. nd a message PILOT 1 ENTERED will appear as confirmation Repeat the steps 1 to 3 for the 3 following pilots 4 2 5 1 TILT mode configuration access to the first page of the configuration BAND FORWARD Pressing the CONFIG 14 key will TILT COWFIG 172 CONFIG menu F PILOTi 166 25 MHz F PILOT2 407 25 MHz To change a given parameter turn the rotary E PILUTS 731 23 MHz F PILOT4 631 25 MHz selector 9 until the field is activated this will appear shadowed and then press The value of Figure 38 TILT configuration 1 2 the parameter will be activated and may be changed by turning the rotary selector When the value you want appears press the rotary selector 9 to validate it Page 38 05 2004 USER S MANUAL PROMAX 10 Premium a BAND It permits to select between the FORWARD mode 45 to 862 MHz and the RETURN PATH mode 5 to 100 MHz b F PILOT 1 It defines a frequency belonging to the forward band from 45 to 862 MHz where the first measurement of level will be done This parameter and the rest of pilots is defined digit by digit by pressing repeatedly and turning the rotary selector c F PILOT 2 It defines the second pilot frequency belonging to the forward band d F PILOT 3 It defines the third pilot frequency belonging to the forward band e F PILOT 4 It defines the fourth pilot frequency belonging to the forward band To accede to the second page of the TILT CONFIG 272 TILT configurati
45. nly analogue channels AUDIO FREQ From 4 00 to 9 00 MHz Audio carrier offset Only digital channels CHANNEL BW From 0 3 to 9 9 MHz Digital channel bandwidth Only digital channels Frequency NOISE FREQ 99 9 MHz relative mode where noise is measured in the C N 5 00 MHz to 862 00 MHz measurement absolute mode Only digital channels Noise NOISEMODE FREQ Absolute Noise measuring mode level is measured at the frequency defined by NOISE FREQ AF Relative The value defined by NOISE FREQ is added to the tuning frequency Channel frequency Offset AFCH From 2 00 to 2 00 MHz USER S MANUAL PROMAX 10 Premium The parameters AUDIO FREQ CHANNEL BW and NOISE FREQ are changed digit by digit starting at the lowest weight To accede to the second page of the configuration menu press CONFIG 14 key again The CTB SHOWED parameter allows to define the method of CONFIG measurement for the CTB IN CH within the channel is the suitable method e ahaa whenever the carrier of the channel in study can be aFCSA2 turned off If it is not possible as approach any other aFCS63 channel free can be defined for the measurement of aFCsa4 the CTB AHL FR CONFIG 2 2 e me mere inn Ch Fi 27 CH FR fi ion 2 2 Parameters AFCS01 AFCS02 AFCS03 igure 7 nae and AFCS04 allow to modify the frequencies where the CSO is measured the PROMAX 10 Premium admits
46. ns should be carried out by authorised agents or by personnel qualified in the servicing of instruments 5 2 1 Cleaning the cover CAUTION Do not use scented hydrocarbons or chlorized solvents Such products may attack the plastics used in the construction of the cover The cover should be cleaned by means of a light solution of detergent and water applied with a soft cloth Dry thoroughly before using the system again CAUTION To clean the contacts use a dry cloth Do not use a wet or damp cloth CAUTION Do not use for the cleaning of the front panel and particularly the viewfinders alcohol or its derivatives these products can attack the mechanical properties of the materials and diminish their useful time of life 5 3 Components which user can not replace 5 3 1 Not replaceable fuses by user To be replaced by qualified personnel Its position identifier and characteristics are F001 FUS 0 5A T 125 V F002 FUS 2 5A T 125 V USER S MANUAL PROMAX 10 Premium APPENDIXES APPENDIX A MEASUREMENT OF THE VIDEO CARRIER LEVEL C ANALOGUE CHANNELS A Negative Video Modulation PAL NTSC The measurement of the video carrier level is carried out taking the modulation peak as the measurement value this being the maximum value of the signal during the line synchronism The system requires a minimum length of time in order to make this measurement since it has to detect the peak of the modulated signal
47. on menu press the CONFIG CONFIG key again This screen permits to define the i 5 08 MHZ frequencies of the pilots belonging to the return path a 16 56 MHz from 5 to 100 MHz As in previous screen the 27 88 MHz frequencies are defined digit by digit neve ce Figure 39 TILT configuration 2 2 IMPORTANT To leave the configuration menu of the TILT mode just press the key of the operating mode you wish to access 4 2 6 DATALOGGER operating mode The LOGGER function permits to automatically measure the level the Carrier Noise ratio and the Video Audio ratio the latter only in the case of analogue channels as well as the power channel and MER measurements of each active channel in the channel plan see paragraph Channel Plan editor at section 4 2 1 Unit Global Configuration These measurements are stored in the memory so that they can be subsequently viewed printed or transferred to a PC The PROMAX 10 Premium will store up to 55 obtained channels or loggers in the memory with a maximum of up to 140 analysed channels in each When pressing the LOGGER 16 fLOGGER LOGGER HUMBER a3 key a screen similar to the one of the attached figure will appear The first line shows the VIEL 21 64 84 logger number i e 53 in the attached figure followed Vener e by the date it was acquired only if MEASURE function was executed on that logger previously Below the ja4 53 25 21 0q4 4 different functions you can perform from thi
48. on menu of the SPECT mode just press the key of the operating mode you wish to access 4 2 5 TILT operating mode The TILT operating mode displays on screen graphically and numerically the difference in level between any four frequencies previously defined as pilots This function provides a quantitative measurement about band equalisation This function can be applied to forward and to the return paths according to is defined in the TILT mode configuration menu section 4 2 5 1 Tilt mode configuration To access this mode of operation TILT 5 dB press the TILT key 12 The screen will TILT a show a bar graph of the four pilot channels 7a and the difference in level TILT between the upper ae pilot and the lower pilot 5 dB in the example When i the pilots are not present or its level is lower than 20 5 Forward Path 662 dBuV the message NO PILOTS will appear Turning the Figure 37 TILT mode rotary selector 9 the reference level may be modified 68 The pilots may be defined in two ways a By frequency Using the TILT configuration menu See section 4 2 5 1 Tilt mode configuration b By channel only pilots in the forward band From the SCAN mode In order to do this 1 Place the marker over the channel you want as low pilot 2 Press the SCAN key 11 and the message PILOT 1 PRESS TILT will appear at the bottom of the screen 3 Keeping the SCAN key 11 held down press the TILT key 12 a
49. ration Carrier Noise C N ratio Bit error rate BER Modulation error ratio MER Constellation Diagram To access to this mode of operation press the CH FR key 10 There exist two tuning modes by channel or by frequency When pressing the CH FR key 10 if the instrument is in this mode allows the switching from channel tuning to frequency tuning 4 2 3 1 Channel tuning 4 2 3 1 1 Video carrier V A C N measurement If the tuned channel has been defined as ra SS55 25MHe CCIR analogue by means of the Edit Channel Plan function see section 4 2 1 Global Configuration Menu the PROMAX 10 Premium will display a screen as the CH 54 de one shown in the attached figure ae 20 40 6 ee Figure 14 V A and C N Level measurement UzA 16 dB The tuned channel C69 in the figure appears in the higher left hand corner this may be changed by turning the rotary selector 9 At its right appears the frequency 855 25 MHz and the active channel plan CCIR in the figure Below is shown the video carrier level VIDEO Carrier 80 dBuV in the example The units of measurement may be changed using the Global Configuration Menu section 4 2 1 At the bottom a bar graph displays the level with a resolution of 1 dB Also the ratios between the video and the audio carriers V A and the video carrier and noise C N are shown The example in previous figure shows a channel with a Video Audio ratio of 16 dB and a C N ratio of 5
50. ried out by qualified personnel On the Maintenance paragraph the proper instructions are given Follow the cleaning instructions described in the Maintenance paragraph USER S MANUAL PROMAX 10 Premium X Symbols related with safety DIRECT CURRENT NS ALTERNATING CURRENT DIRECT AND ALTERNATING ONZ M GROUND TERMINAL 2 PROTECTIVE CONDUCTOR pam FRAME TERMINAL EQUIPOTENTIALITY ON Supply oN 7 OFF Supply a wo DOUBLE INSULATION Class II protection CAUTION Risk of electric shock CAUTION REFER TO MANUAL eS ol FUSE Page 10 05 2004 USER S MANUAL PROMAX 10 Premium 2 2 Descriptive Examples of Over Voltage Categories Cat Low voltage installations isolated from the mains Cat Il Portable domestic installations Cat Ill Fixed domestic installations Cat IV Industrial installations USER S MANUAL PROMAX 10 Premium 3 INSTALLATION 3 1 Power supply The PROMAX 10 Premium is a portable instrument powered by a built in 7 2 V NiMh rechargable battery Before taking any measurement the user should make sure that the battery is fully charged use the mains adapter supplied with the instrument 3 1 1 Battery charge The instrument has a 230 V 50 60 Hz mains adapter for use in EUROPE and other countries to power or to charge the instrument See accessories to request other types of adapters There are two different situations on battery charge 1
51. rument A simple keyboard gives direct access to the various operating modes and once in them any measurement parameter can be easily changed using the rotary selector button In addition it has an RS 232C terminal for connecting to a printer or computer for producing reports on the measurements obtained The instrument is powered by means of an internal rechargeable battery All these functions have been brought together in one instrument weighing only half a kilo The ergonomic sturdy design makes the PROMAX 10 Premium a working tool without parallel 1 2 Specifications A TUNING Tuning range From 5 to 862 MHZ Tuning mode By channels or by frequency Channel plan 10 channel plans each one with a maximum of 140 channels Factory start up channel plans CCIR EIA OIRL JAP2 UK FCC STD2L AUST Resolution 10 kHz Indication Graphic LCD with back lighting Channel frequency offset 2 MHz 10 kHz resolution POWER LEVEL MEASUREMENT Measuring range From 70 to 120 dBuV From 10 dBmV to 60 dBmvV Bandwidth From 5 to 862 MHz Resolution 1 dB Accuracy 3 dB From 5 to 40 C LEVEL MEASUREMENT Measurement Analogue channels Video carrier level measurement Digital channels Power measurement in the channel bandwidth by integration method Measuring range From 25 to 120 dBuV From 35 dBmV to 60 dBmv Page 2 05 2004 PROMAX USER S MANUAL PROMAX 10 Premium Maximum input level From 5 to 862 MHz DC to 60
52. s The SCAN operating mode shows the signal level of all channels present on the chosen frequency band in a bar graph display The span and the reference level may be selected through the rotary selector In addition a moving marker shows the numeric level of any specific channel This mode also permits to define the pilot channels used for the TILT measurement only in the forward band This key permits to accede to 2 operating modes The SPECTRUM ANALYSER mode provides a spectrum analysis over the entire band in two parts return path or sub band 5 to 100 MHz and forward band 5 to 862 MHz The span is user definable between 1 and 100 MHz In addition it is possible to change the reference level and maximum and minimum levels may be detected and held for INGRESS measurements USER S MANUAL PROMAX 10 Premium In the TRANSIENT DETECTOR mode the PROMAX 10 Premium operates as a transitory counter in the return path The level detection threshold and the frequency margin are user definable TILT The TILT operating mode shows on the display both graphically and numerically the level difference between any four channels previously defined as pilot channels in order to obtain information about band equalisation This function can be applied to the forward band and to the return path independently To access any operating mode simply press the corresponding key The parameters relative to a particular operating mode can be mo
53. s operating mode are shown VIEW MEASURE and PRINT Figure 40 LOGGER function Initial menu USER S MANUAL PROMAX 10 Premium On the bottom of the display appears present time and date To modify them see section 4 2 1 Global Configuration Menu To accede to any of the different fields of the initial screen of the LOGGER function turn the rotary selector 9 until it is activated it appears shadowed and next press it First of all you must select the logger on which you want to perform any function turn the rotary selector until the LOGGER NUMBER field is shadowed and press it Then turning the rotary selector select the desired logger from 0 to 54 and finally press it again to validate The acquisition date appears under the logger number only if you have taken measurements on this logger To carry out a logger acquisition you must select the MEASURE function for this purpose turn the rotary selector 9 and when this field appears shadowed press it in this way you will accede to the logger Next press again the rotary selector 9 in order that the PROMAX 10 Premium makes all the measurements defined in the LOGGER configuration menu over all the active channels of the channel plan see Edit Channel Plan function at section 4 2 1 Global configuration menu IMPORTANT The processing of channels as analogue or digital and the parameters to make the measures the frequency of the audio carrier for the analogue channels a
54. sembled to a C N measurement as it is desired to be maximum Similarly the CTB Composite Triple Beat is defined as a ratio of the peak level of the video carrier to the peak of distortion products of third order beat which show up at the same frequency as the video carrier In order to obtain these measurements the carriers of the channel plan that is desired to transmit must be present in the network and the measurements must be carried out for each one of the channels of the system Second order beats show up within the channel around the video carrier but as the relative position of the video carrier in all the channels can be different it is difficult to determine where they are going to appear as a consequence we would have to be made a sweep within all the channel The PROMAX 10 Premium performs this measurement automatically at four frequencies around the video carrier 1 5 0 5 0 5 and 1 5 MHz These frequencies can be modified by the user see Channel Frequency mode configuration menu section 4 2 3 3 USER S MANUAL PROMAX 10 Premium Pdora ON Pdora OFF Carrier ON Carrier OFF Pteuse ON Pteuse OFF CSO 1 5MHz 0 5 MHz 0 5 MHz 1 5 MHz Figure 16 Interpretation of the CSO and CTB measures The PROMAX 10 Premium displays as CSO value the worst measurement that is to say the CSO ratio that has minor value accompanied of the frequency offset for which it has been obtained for example in the figure pre
55. t the centre of the channel which previously remain masked by the noisy nature of the signal 4 2 4 4 TRANSIENT DETECTOR operating mode IMPORTANT The Transient detector mode is only operative in the return path The TRANSIENT DETECTOR mode allows to count the number of transitory with a level higher than a certain threshold The threshold is defined by the user between 20 and 60 dBuV as well as the detection frequency range The SCAN field shows the margin of frequencies on which the detector acts the higher frequency can be reduced by means of the STOP FREQ parameter on the configuration menu TRAHSIEHT DETECTOR SCAH S 68MHz TIME 4 285 COUHTER 12 eee z0 J0 56 68 T Figure 35 Transient detector mode Page 36 05 2004 The lower line TIME shows the time since the detector is active USER S MANUAL PROMAX 10 Premium The COUNTER field shows the number of impulses that have exceeded the level defined by the REF LINE parameter in the configuration menu of the SPECT mode section 4 2 5 5 To initialize the TIME and COUNTER fields press the SPECT 13 key In the lower part of the screen it appears a bar that shows present level a dotted line shows the detection threshold REF LINE whereas the continuous line indicates the maximum detected level 4 2 4 5 SPECTRUM ANALYSER mode configuration access the parameter configuration menu for the SPECTRUM function Pressing the CONFIG key 14 will
56. teeeeeaes 24 42 3 1 Channel tUg sieaa ea a Eara ST 24 4 2 3 1 1 Video carrier V A C N measurement ccceeeeeeeteeeeeees 24 4 2 3 1 2 Audio carrier measurement and demodulation cceeeeeeee 25 4 2 3 1 3 CSO CTB distortion products measurement 25 4 2 3 1 4 Power and C N ratio measurement of digital channels DVB C DVB T DAB c2 c22 lt 23 lt 25ecacccssicsavetsastcetetasibsiacecseicexetasmmactetea a 27 4 2 3 1 5 Constellation Diagram representation Bit Error Rate BER and Modulation Error Ratio MER measurement in digital channels 29 4 2 3 1 6 Configuration of QAM signal measurement using edit channel plan 29 4 2 3 2 Frequency tuning and Configuration eceeceeeeseseeeteeeeeeeeeeeeeeeeeeee 30 4 2 3 3 CHANNEL FREQUENCY mode configuration s e 33 4 2 4 SPECTRUM ANALYSER operating mode cecceeseeeteeeeeeeeeeeeeeeeeeeees 34 4 2 4 1 SPECTRUM operating mode eecceeceeeceeeeeeereeeeeeaeeeeeeeieereeeeeaeenaes 34 4 2 4 2 MAX operating mode 0 0 eee eeceeeeseeeeeeseceseeceeseeeeeaeeeaeeseeeeeeseaeseneesaes 35 4 2 4 3 MIN operating MOE siise aeeie dra ia iiaeaa 36 4 2 4 4 TRANSIENT DETECTOR operating mode 36 4 2 4 5 SPECTRUM ANALYSER mode configuration 37 4 25 TILT Operating MOO s ccciesieatcect es cencisees sheen veniedvierctiauutveraiieen 38 4 2 5 1 TILT mode Configuration rrisin irina ana 38 4 2 6 DATALOGGER operating MOde ccecceeseeeeeeeee
57. the measures to irregular tunings due to small displacements on channel central frequencies that are defined by the standard channel plan central Freq Ch 30 FCC 569MHz a Central Freq Ch 33 CCIR 570MHz in AR Offset 1MHz AFCH 1MHz Ch 33 Figure 52 Frequency offset on the tuning central frequency Taking as example the previous figure if we suppose that in the configuration parameters of the digital channel CH 33 a frequency offset equals to 1 MHz has been defined for the channel tuning frequency AFCH 1MHz although the central frequency corresponding to channel 30 569 MHz does not match with the defined one for the current CCIR channel plan CH 33 570 MHz it will be possible to take measures corresponding to the Docsis normative for the standard FCC channel plan CH 30 569 MHz with no need to modify the current channel plan or to enter a new one
58. the other hand when a level is defined only those channels with a level higher than the THRESHOLD value will be measured b MEASURES It defines the types of measurements to be made This parameter allows to select the measurements that are desired to made between USER S MANUAL PROMAX 10 Premium ANALOGUE CHANNELS DIGITAL CHANNELS Audio Carrier Level Video Noise Power MER BER Ratio Ratio LEVEL POWER Yes Yes AV C N MER Yes Yes Yes Yes Yes e i si Yes Yes Yes Yes Yes Yes Note The BER measurements represent an increase of the data acquisition time IMPORTANT To leave the configuration menu of the DATALOGGER mode just press the key of the operating mode you wish to access 4 3 Connection to a Computer or Printer The PROMAX 10 Premium permits the connection to a PC or to a serial printer for data transfer by means of the connection cable model CC 208 Do not connect any cable other than that supplied by the manufacturer otherwise serious damage may be caused to the equipment 1 Prior to connecting the equipment to a PC disconnect both from their respective power supplies 2 Connect the end of the connection cable corresponding to the PROMAX 10 Premium to connection 8 and the other end to the serial port of your computer or printer Once the computer or printer have been connected select on the PROMAX 10 Premium the LOGGER operation mode
59. tor 9 until the field is activated it will appear shadowed and then press The value of the parameter will be activated and may be changed by turning the rotary selector When the value you want appears press the rotary selector 9 to validate it DESCRIPTION PARAMETER VALUES Carrier type MODE FREQ _ ANL Analogue DIG Digital Frequency steps FREQ STEP From 0 01 to 10 00 MHz Only digital channels CHANNEL BW From 0 3 to 9 9 MHz Digital channel bandwidth Only digital channels NOISE FREQ 99 9 MHz relative mode Frequency where noise is measured 5 00 MHz to 862 00 MHz in the C N measurement absolute mode Only digital channels NOISE MODE FREQ Absolute Noise Noise measuring mode level is measured at the frequency defined by NOISE FREQ BW 2 Relative The value defined by NOISE FREQ is added to the tuning frequency Only ANL mode CTB measurement mode CTB SHOWED IN CH or free channel Only ANL mode AFCS01 AFCS01 From 0 5 to 2 50 MHz Only ANL mode AFCS02 AFCS02 From 0 5 to 2 50 MHz Only ANL mode AFCS03 AFCS03 From 0 5 to 2 50 MHz Only ANL mode AFCS04 AFCS04 From 0 5 to 2 50 MHz System according to country ANNEX ITU T DVB B C QAM Modulation MODULATION 16 32 64 128 256 Symbol Rate SYMBOL RATE 1 000 to 7 000 Attenuation ATTN Auto or from 0 to 60 dB Steps of 10 in 10 The parameters FREQ
60. urement Graphical representation of DVB QAM signals Constellation Diagram The Datalogger function allows up to 55 loggers or measurements to be taken and stored each with carrier levels C N and V A ratios channel power or MER of up to 140 channels The measurements obtained may be checked transferred to a PC or printed at any time In Scan operating mode the PROMAX 10 Premium indicates the level of all channels present on the band in a bar graph display The span and reference level are user definable A moving marker shows the exact level of each specific channel In Tilt operating mode the screen shows both graphically and numerically the difference in levels between any four previously defined pilot frequency channels in order to obtain a qualitative measurement on band equalisation 05 2004 Page 1 USER S MANUAL PROMAX 10 Premium As a Spectrum Analyser it provides the analysis of the entire band with a span defined by the user from 1 to 100 MHz Furthermore it is possible to alter the reference level and to detect and maintain the maximum and minimum values for INGRESS measurements The Transient Detector mode permits to count the number of impulsive interferences in the return path and with a level higher than a threshold defined by the user The maximum frequency range is from 5 to 100 MHz In designing the PROMAX 10 Premium special attention was given to building a multi purpose accurate yet easy to use inst
61. vious at 0 5 MHz The CTB measurement is performed equivalently to the CSO If all the channels that are transmitted have the video carrier at the same position within the channel then the CTB beat will show up at the same frequency as the video carrier It is for that reason that the PROMAX 10 Premium makes this measurement at the same frequency as the video carrier and as consequence to make this measurement it is necessary to turn off the video carrier of the channel we want to analyse If it is not possible to turn off the carrier at the head end the PROMAX 10 Premium allows like approach to make this measurement at one of the free adjacent channels see section 4 2 3 3 Channel Frequency mode configuration MEASURING METHOD When pressing the rotary selector 9 again we will accede to the CSO CTB lt eae distortion products measuring screen pee Gers SU CEM First of all it will appear the message REMOVE ae aunt es ih CARRIER PRESS TO MEASURE That is to say gt 5671 50 2 5270 5 once the video carrier level on which it is desired to 48 6 58 gt 57 make the measurement appears on the screen Figure 17 CSO and CTB you must press the rotary selector 9 in order that measurement the unit retains the carrier level and comes to calculate the CSO and CTB ratios next you must turn off the video carrier of the channel you want to make the measurement at the right of the CTB measurement will appear the message Carrier OFF
62. you must press the CONFIG 14 key repeatedly the first UNIT time that presses this key accedes to the configuration 145 menu relaie to the me in use which can H more ENTE 21 63 2884 than one page The global configuration menu consists of two pages attached figure shows the Figure 5 Global configuration 1 2 first one to switch from one to the other simply press the CONFIG 14 key dEl In order to modify the state of a given parameter you must turn the rotary selector 9 until this one appears shaded and next press it then the value of the parameter will appear shaded and turning the selector a new value will be able to be defined Finally to validate the new state press the rotary selector 9 again The first page of the global configuration menu permits to modify the following parameters a CHANNEL PLAN It allows you to choose the active channel plan between the 10 channel plans that unit can store CCIR EIA FCC etc b EDIT CHANNEL PLAN When selecting this field and pressing the rotary selector the unit accedes to the active CHANNEL PLAN The attached figure shows an example of channel plan The first line shows the name of the channel plan CCIR in the figure the audio carrier offset 5 50 MHz the modulation type FM and the units of measurement dByuV Next line shows the head of the columns that constitute the channel plan the first column CHAN shows the name of each channel and the secon

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