KWS AMA310/UMS Скачать руководство пользователя страница 28 | Manualshive

Страница: 28 / 62

KWS AMA310/UMS Скачать руководство пользователя страница 28

Chapter 6 - Measuring Mode UMS (Upstream-Monitoring-System)

27

AMA 310/UMS V21.0

6.6.5

MER/BER Measurement and Quickcheck

The LC display here shows the status "BER-Measurem." as well as the storage place number
within the UMS settings (here: 3) and the serial number (here: 61317) of the field instrument
performing the quality measurement:

Figure 6-11 LC display during MER/BER measurement by a field instrument

Apart from all parameters defined above the display continues to show:

MER/BER Parameters

Indicated Value

Frequency

24.50 MHz

LOCK Status

LOCK

Transmission data format

PRBS (pseudo-random bit sequence)

Modulation

256QAM

Symbol rate

SR = 2560 kSymb/s

Reception level

L = 59.7 dBµV

MER (modulation error rate)

> 40 dB

BER (bit error rate)

< 1.00e-8 (corresponds to < 1

•

10

-8

)

In case of the Quickcheck, the display switches between up to four BER measurements.

During a MER/BER measurement, the graphics screen shows the real-time constellation:

Figure 6-12 Constellation diagram during MER/BER measurement by a field instrument

6.6.6

Line-up Assistance and TILT Measurement

During measurements which are based on the transmission of 4 sinusoidal carriers by the field

instrument, the status "TILT-Measurem.", the storage space number within the UMS settings (here:

3) as well as the serial number (here: 61317) of the field instrument performing the TILT
measurement or the line-up process is shown in the LC display. The graphics screen shows the

real time spectrum in which now the four sinusoidal carriers as they have been defined in the UMS

«
...
26
27
28
29
30
...
»

Содержание AMA310/UMS

Страница 1: ...AMA310 UMS Head end unit for return channel monitoring Manual ...

Страница 2: ... with the optional Cluster Switch SW 024 17 4 6 Switch On 17 Chapter 5 Menu Structure 18 5 1 Navigation in the Menus and Editing of Parameters 19 5 1 1 Navigation with Arrow Keys 19 5 1 2 Editing of Parameters via the Numeric Keyboard 20 5 1 2 1 Numeric Parameters 20 5 1 2 2 Alphanumeric Parameters 20 5 1 3 Save Settings 21 Chapter 6 Measuring Mode UMS Upstream Monitoring System 22 6 1 Introductio...

Страница 3: ...easurement 44 8 1 6 Forward Path Measurement 44 8 1 7 Cluster Differentiation when using the RF Switch SW 024 45 8 1 8 Export Import of the UMS Settings 45 8 1 9 Report Protocol 45 8 2 System Plan 49 Chapter 9 Instrument Management 51 9 1 Language for Operator Guidance 51 9 2 Query of Software Status and Hardware Configuration 51 9 3 Software Update Device Firmware 52 9 4 Update of Hardware Module...

Страница 4: ...hanges for derivate AMA 310 UMS no V20 0 No changes for derivate AMA 310 UMS no V21 0 No changes for derivate AMA 310 UMS no Reference Documents This operating instruction refers to the following other documents SW 024 Operating Instruction Application Note 006 Upstream Monitoring System UMS ...

Страница 5: ...ust be applied to the RF input of the measuring receiver as otherwise the input circuits may be destroyed The ventilation slots of the instrument must not be covered If covered this may result in a reduced air circulation in the instrument leading to a heat accumulation and thus to an overheating and damaging of the electronic components 1 2 Usage Notes The warranty for a new instrument ends 24 mo...

Страница 6: ... the front foil coating may be damaged The ventilation slots should be cleaned from dust at regular intervals such that the air circulation through the instrument by the built in ventilators will not be impaired 1 5 Calibration The measuring instrument should be calibrated at least every two years During servicing the instrument will be automatically calibrated in the factory 1 6 Service The servi...

Страница 7: ...lay Separate LCD for measured values 320 64 User Prompting German and English RF INPUT F Socket 75 Ohm IEC 60169 24 Return Loss 14 dB RF Sum Power 500 mW External Voltage 70 Veff DC 50 Hz INPUT ATTENUATOR 0 60 dB in 2 dB increments LEVEL RANGE Measuring Range 20 120 dBµV Resolution 0 1 dB Measuring Accuracy 1 0 dB at 20 C warm up time 5 min 2 0 dB 0 C 40 C warm up time 5 min Measuring Bandwidth 1 ...

Страница 8: ... 2 MSym s Modulation Schemes QPSK 16 64 and 256 QAM Measuring Parameters per ETR 290 BER 1 00 10 6 1 00 10 7 1 00 10 8 depending on bandwidth symbol rate setting MER up to 40 dB Resolution 0 1 dB Measuring Accuracy 1 5 dB ASI Output Output level typ 800 mVpp Connection BNC Socket Output Impedance 75 Ohm USB Management USB A V1 1 Full Speed Switch Control USB A KWS proprietary protocol and assignme...

Страница 9: ...e to the head end device Sweep wobbling function TILT function CPU 32 bit RISC architecture RTOS Real Time Operating System FAT32 file system 64 MByte flash disk Software update Via USB stick POWER SUPPLY Mains Built In primary Power Supply Unit Mains voltage 100 120 VAC 200 240 VAC 50 60 Hz Power consumption 45 W max ENVIRONMENTAL CONDITIONS Operating Temperature 0 C 45 C Storage Temperature 10 C...

Страница 10: ...apter 2 Technical Data 9 AMA 310 UMS V21 0 QUANTITY OF DELIVERY Included in the delivery User Manual USB stick Power Cable 2 pieces clamping angle for 19 rack mounting 8 pieces M4 x 8 mm crosshead screws ...

Страница 11: ... 2 Right Side of the Instrument The ventilation slots are on the right side of the instrument They are positioned in such a way that they will not be covered if the instrument is mounted in a 19 rack by means of the clamping angles Please make sure that the ventilation slots are not covered and sufficient ventilation is guaranteed in case it is mounted in the rack in order to avoid overheating ...

Страница 12: ...ost has to know the type of the device and load an appropriate driver This happens after a device has been connected to the USB interface This process is called enumeration The standard defines several USB device classes However the measuring instrument only supports the class MASS STORAGE DEVICE USB stick Via the integrated FAT32 file system the software of the measuring receiver can write files ...

Страница 13: ...ersion of the instrument this interface has no function 3 5 2 Streaming Interface The measuring instrument is equipped with an Ethernet interface in standard 10 100Base T with a maximum signaling rate of 100 MBit s The RJ 45 socket used is situated on the back panel This interface is used to stream an MPEG transport stream to the headend equipment this can either be done via the ASI interface see ...

Страница 14: ...he back panel In the current version of the instrument the ASI input has no function At the ASI output a signal is applied as soon as the UMS mode is activated and the ASI interface has been set as transport stream interface in the UMS settings this will be described in subsequent chapters of this manual 3 7 Control Output to optional Cluster Switch SW 024 The control output to the optionally avai...

Страница 15: ... the 19 Clamping Angles If the receiver AMA 310 UMS is to be mounted in a 19 rack the angles supplied first have to be mounted on both sides of the instrument Figure 4 1 Assembly of 19 installation angle The assembly is made by the M4 crosshead screws included in delivery Each angle is to be fixed with four screws on the housing as shown above The screws should be tightened firmly The height of th...

Страница 16: ... V21 0 4 2 1 Assembly with Half a 19 Rack Unit on the Top If the clamping angles are mounted as labelled with right and left when delivered the half height unit is on the top Figure 4 2 Clamping angle assembly with half 19 rack unit on the top ...

Страница 17: ...mping angle assembly with half 19 rack unit at the bottom 4 3 Fan Control Two integrated fans supply sufficient ventilation for the electronic components These are controlled by a microprocessor by measuring the internal temperature of the instrument Make sure that the ventilation slots on the right hand side of the instrument and the ventilation outlet ports on the back of the instrument are not ...

Страница 18: ...nd ingress components of several upstream paths on the instrument input superimpose which results in a deterioration of the signal quality S N and may impede the search for the source of the ingress noises 4 5 Connection with the optional Cluster Switch SW 024 The SW 024 switch is to be connected with AMA 310 UMS via two lines These are supplied as accessories together with the switch The output S...

Страница 19: ...at different menus appear in the basic state and when the instrument is tuned Apart from that after pressing the keys ANALYZ for Analyzer PRINT and MODE further independent main menus appear which additionally structure the scope of functions of the instrument The keys RANGE ANA DIG LNB RECALL and or SAVE have no function in AMA 310 UMS Via the key HOME the measuring receiver is reset to the basic...

Страница 20: ...nt are used This will be illustrated below by the example of the editable downstream frequencies for report generation see Chapter 8 1 6 Forward Path Measurement The relevant submenu will be selected from the basic state of the instrument via the operating steps UMS SETTING DNSTREAMS The following LC display content is shown Figure 5 4 UMS downstream menu 5 1 1 Navigation with Arrow Keys If the do...

Страница 21: ...f screen shots upper case and numeric characters are permitted see Chapter 10 and the input of cleartext names for the field instruments which are used at the UMS upper and lower case letters as well as numeric characters are allowed see Chapter 8 1 4 In these cases each character to be edited has to be selected in sequence via the arrow keys The different characters possible can be generated by a...

Страница 22: ...parameter to parameter until all settings have been made If further parameters shall be retained in their settings and not changed you can skip the relevant parameter quickly and without making any changes either by ENTER or by At the end of all settings it is important to move the cursor in a submenu to APPLY and to acknowledge this menu item by ENTER Only in this way will the settings made be pe...

Страница 23: ...ed Further information can be found in the Application Note AN006 Upstream Monitoring System UMS on www kws electronic de in SUPPORT Application Notes Basically the overall measurement functionality is initiated from the field device during on going UMS operation virtually no operating steps are required at the AMA 310 UMS Therefore we also refer to the operating instructions of the field device V...

Страница 24: ... apart from Idle can be taken from chapter 6 6 Displays for Measurements in Connection with the Field Device VAROS 107 The key ABORT Cancel terminates the UMS operation and puts the instrument back into the basic state If the back side Ethernet interface in the UMS settings is chosen as transport stream output see Chapter 8 1 1 4 TS Output there is also a status message as regards this interface i...

Страница 25: ... interruption in the power save mode is only possible by pressing the HOME key By pressing the F5 key the saving mode may be temporarily deactivated for example in order to check the graphics display The following display is shown Figure 6 6 Power save mode inactive TS via IP After about 10 seconds the instrument returns automatically to the power save mode The power save mode remains switched on ...

Страница 26: ...ced at the AMA 310 UMS we refer to the operating instructions of the field instrument and to the already mentioned Application Note AN0061 for operating the system and for interpreting the results The displays presented here are examples and may deviate in field use depending on which TS output has been selected which mode has been selected power save mode keyboard lock and whether an optional clu...

Страница 27: ...61317 of the field instrument which requested the MAX HOLD display Figure 6 9 LC display after MAX HOLD request by a field instrument 6 6 4 Frequency Sweep by a Field Instrument Also this mode sweeping determination of the frequency response does not lead to a changed representation in the graphics display In the real time spectrum you can see that frequency packets of four sinus signals which are...

Страница 28: ... level L 59 7 dBµV MER modulation error rate 40 dB BER bit error rate 1 00e 8 corresponds to 1 10 8 In case of the Quickcheck the display switches between up to four BER measurements During a MER BER measurement the graphics screen shows the real time constellation Figure 6 12 Constellation diagram during MER BER measurement by a field instrument 6 6 6 Line up Assistance and TILT Measurement Durin...

Страница 29: ... of the UMS system a measurement of forward channels by the field instrument For the displays at the headend this simply means that the above described displays for BER measurement frequency sweep ranging processes and telemetry communication alternate 6 7 Timeout If a field instrument does not actively terminate an exclusive measurement e g sweeping BER measurement e g because the battery of the ...

Страница 30: ...en controlled automatically and or this is activated by the field instrument The displays presented here are examples and in field use there may be deviations depending on which TS output or which mode is chosen power save mode keyboard lock 6 8 1 Summary and Selective Path When operated with the cluster switch SW 024 there are two fundamentally different operating types On the one hand the switch...

Страница 31: ... 6 16 Graphics screen content in the basic state of the UMS measuring mode with switch Figure 6 17 LC display at MAX HOLD request by a field instrument in summary mode 6 8 3 Displays in the Selective Mode In a cluster selective measurement by a field instrument the measuring system automatically determines the input of the switch to which the field instrument which makes the current measuring requ...

Страница 32: ... during TILT measurement by a field instrument at switch input 4 6 8 4 Final Remarks The remarks on ranging and telemetry signals which can be found in Chapter 6 6 2 Ranging and Commands via Telemetry Carriers from Field Instruments apply by analogy for the operation with the cluster switch Moreover certain commands and or frequencies are down mixed to a frequency below the return path spectrum 4 ...

Страница 33: ...s also not possible The following display shows a return path spectrum as an example Figure 7 1 Graphics display after start of the real time spectrum analyzer The level raster is 10 dB DIV The dynamics can be a maximum of 70 dB The labelling of the level lines in the unit dBµV can be seen on the left side In the blue bottom line the start and stop frequency band limits are shown At the same time ...

Страница 34: ...the frequency of the current cursor position in MHz 7 3 Level Display Apart from the current cursor position the LC display constantly shows the level measured at this position In this level measurement it has to be taken into account that the level shown refers to the measurement bandwidth corresponding to one pixel of the graphics display 120 kHz A level measurement by the cursor is thus only po...

Страница 35: ... deactivated again Figure 7 5 Activation of the MAX HOLD function in the real time analyzer In the MAX HOLD operation the spectrum is only updated if the level between two measurement cycles has increased Particularly when searching ingress disturbers this function is of crucial importance as they often occur only for a very short time As the spectrum is continuously real time determined within th...

Страница 36: ...l of the AMA 310 UMS has to be attenuated depending on the expected level conditions at the RF input The instrument derives the level conditions to be expected from the reference level set The automatically selected attenuation is shown on the bottom left in the LC display As shown for example in Figure 7 3 and Figure 7 4 no RF attenuation is required for a reference level of 60 dBµV the display i...

Страница 37: ...e RF input may be easily overloaded by the useful signals applied The result of an overload are distortions which become noticeable by harmonics and mixing products from the useful signals This means signal portions arise which are not contained in the measured signal but are produced by the measuring instrument itself Particularly disturbing is this effect with narrow band signals high signal lev...

Страница 38: ...Chapter 7 Analyzer Mode 37 AMA 310 UMS V21 0 Figure 7 9 Analyzer Reference level 75 dBµV attenuation 10 dB Figure 7 10 Analyzer Reference level 75 dBµV attenuation 5 dB ...

Страница 39: ...eam Monitoring System UMS 3 Differences in the display are only given in the graphics display where in the blue line at the bottom of the display now the configurable alias name of the selected switch input is additionally shown between the band edge frequencies of the spectrum After activating the analyzer with the switch connected the spectrum of the summary path is shown as a standard see also ...

Страница 40: ... to switch between the inputs of the RF switch and the summary signal generation Figure 7 13 Analyzer operation with switch SW 024 input selection The alias names shown here for the switch inputs can be configured This will be described in Chapter 8 1 7 Cluster Differentiation when using the RF Switch SW 024 Figure 7 14 Analyzer operation with switch SW 024 selective path ...

Страница 41: ...Mode AMA 310 UMS V21 0 If the menu item SWITCHMATR is selected without connecting a RF switch the following error message appears Figure 7 15 Input selection in analyzer operation with switch SW 024 without connected switch ...

Страница 42: ...ft within this time the key lock switches on again 8 1 1 3 Power Save Mode By selecting the menu item CONFIG POWER SAVE an energy saving mode can be activated In this setting shortly after the start of the UMS function the graphics screen the LC display illumination and the keyboard illumination switch off 8 1 1 4 TS Output By selecting the menu item CONFIG TS OUTPUT the interface for the transpor...

Страница 43: ... the instrument 8 1 2 Transport Stream Settings By selecting the menu item TS PSI an input window can be called up in which some transport stream settings can be made In the UMS mode the instrument supplies a DVB compliant transport stream with several PES Packet Elementary Stream data streams as well as SI Service Information data By selecting the input window the following parameters can be set ...

Страница 44: ...end with its serial numbers The signaling from handhelds to the headend is done by ASK modulated telemetry carriers and their frequencies have to be in the upstream frequency range By selecting the menu item HANDHELD an input window can be called up in which all handhelds with its serial numbers telemetry carriers and if required the names of the owners technicians can be registered At the same ti...

Страница 45: ... and modulation schemas can be entered When entering the frequency 0 a test carrier can be deleted from the system Valid symbol rates are 320 kSym s 640 kSym s 1280 kSym s 2560 kSym s and 5120 kSym s Admissible modulation schemas are QPSK 16QAM 64QAM 256QAM Here again the input of a system graphics shown see chapter 8 2 System Plan is supported 8 1 5 3 TILT Measurement Apart from the frequency swe...

Страница 46: ... the headend unit 8 1 9 Report Protocol The field instruments can generate an automated report according to the specifications of the headend For the report all measurements which the measurement system is able to do are performed one after the other This means one MER BER measurement on up to four test carriers see chapter 8 1 5 2 Bit Error Rate Measurement BER a sweep measurement for exact frequ...

Страница 47: ...ure 8 4 VAROS 107 Report menu page 1 free text categories 1 and 2 Now the technician can enter the name or the number of the customers as well as the order number for the report currently to be made on the report menu page 1 On the report menu page 2 the measurement location and the name of the technician are entered please take the information on the operation of the field instrument VAROS 107 fr...

Страница 48: ...y 5 is missing as it has not been provided by the headend The categories 1 to 4 have been filled with information John Doe 33495 John Sample and Any Street by the technician Figure 8 6 Report workbook Common with filled in free text fields The advantage of the XML data file format is that you can process the report with standard PC programs For example from the X Y coordinates frequency and level ...

Страница 49: ...48 Chapter 8 UMS Configuration AMA 310 UMS V21 0 Figure 8 7 Report workbook WOBBEL with manually prepared frequency sweep curve ...

Страница 50: ...h carrier type of the profile is currently processed see next figure In case a frequency is put in which leads to a collision in the system an error message will appear If a faulty setting is not corrected the UMS mode cannot be started as this might possibly disturb the cable modem operation A system plan can be exported as bitmap file If the PRINT key is pressed when the system plan is shown an ...

Страница 51: ... in light blue in the system plan The test frequencies for the bit error rate and the MER measurement are shown in green The sine tones shown in dark blue are used for the TILT measurement They should be distributed as evenly as possible over the complete frequency range used Be careful if ingress block filters are used in the lower part of the return path spectrum The telemetry frequencies shown ...

Страница 52: ...ry of Software Status and Hardware Configuration By means of this function the user can query all relevant hardware and firmware statuses of the instrument The menu item MODE FIRMWARE INFO has to be called up Then the instrument shows the current firmware status as well as some information on the MPEG decoder and the DSP module UMS hardware including real time spectrum analyzer In the firmware sta...

Страница 53: ...update By pressing the ENTER key the software update is started The device first deletes the old version from the memory and then the new software is installed into the internal flash memory This process can take about 70 seconds As soon as the update is finished a short beep can be heard and the device reboots with the new firmware 9 4 Update of Hardware Modules The device includes some component...

Страница 54: ... device management refers to the management Ethernet interface on the front panel of the device which is not used in the current extension stage of the AMA 310 UMS This MAC address should not be confused with the address of the streaming interface on the back panel of the device The readout of this hardware address is described in Chapter 8 1 1 4 TS Output By pressing the ENTER key the INFO window...

Страница 55: ...shown in the display line above the menu bar By selecting the menu item MODE TIME DATE the following input menu can be called up Here date and time can be changed e g for changing between summer and winter time Figure 9 9 Menu for setting date and time By the keys and or the cursor can be moved to the desired input field Now the changed input can be made by the numeric keyboard Each input has to b...

Страница 56: ...e mode for a short time 9 11 Formatting the Internal Flash Disk The device is equipped with a 64 MByte flash disk The formatting of the data carrier has been provided by the factory By selecting MODE FLASH DISK FORM FLDSK a new formatting of the flash disk can be made In this way all data which had been created by the user are deleted again 9 12 Export of the Internal Flash Disk By selecting MODE ...

Страница 57: ...le name manually each time and without running the risk that already saved data will be overwritten Via FLASHDISK or USB STICK the destination medium is preset If the file name is completely edited the cursor can be moved by pressing ENTER to the START field After activating the ENTER key again the content of the LC display at the time before pressing the PRINT key is written into a BMP file with ...

Страница 58: ...HARDCOPY VOLUME FLASHDISK or USB STICK it can be set which drive shall be selected by default for future storage processes example USB drive in Figure 10 1 Hardcopy of the LC display content on a USB stick The drive which is set here will also be called up if files are to be deleted or copied via the submenu DIRECTORY see Chapter 10 4 10 4 Calling Up the Directory of the BMP Files By selecting the...

Страница 59: ...or the choice REMOVE can be selected If the ENTER key is pressed now the device deletes the file HARDCOPY1 BMP from the Flash Disk in this case 10 4 2 Copy BMP Files When the directory is open it is possible to move the cursor to the desired file name by pressing the keys and or By pressing the ENTER key the following choice appears Figure 10 5 Copy of BMP files in the FLASHDISK directory By press...

Страница 60: ...output via IP 30 Figure 6 16 Graphics screen content in the basic state of the UMS measuring mode with switch 30 Figure 6 17 LC display at MAX HOLD request by a field instrument in summary mode 30 Figure 6 18 LC display during a frequency sweep by a field instrument at switch input 4 31 Figure 6 19 LC display during MER BER measurement by a field instrument at switch input 4 31 Figure 6 20 LC disp...

Страница 61: ...1 Figure 9 3 Selection of the bin2 file for the firmware update 52 Figure 9 4 Menu for the update of individual components of the AMA 310 UMS 52 Figure 9 5 Query of the Serial Number 53 Figure 9 6 Query of the MAC address 53 Figure 9 7 HARDWARE menu and query of the FPGA version of the SW 024 53 Figure 9 8 Resetting of the device to the delivery state 54 Figure 9 9 Menu for setting date and time 5...

Страница 62: ...00 49 0 80 67 90 37 99 info kws electronic de www kws electronic com You are interested in obtaining further information about our products solutions and services KWS Electronic is at your disposal with expert advice Call us or send us an e mail Software updates firmware you can find it at any time at www kws electronic com ...

Отзывы:

Нет отзывов