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TD-LTE Signal Analyzer

6-12 Measurements Menu

3GPP MG

PN: 10580-00234 Rev. Y

6-41

Control Channel Power Menu

Key Sequence:

Measurements

> Modulation > Control Channel Power

Display Mode:

Select Bar Graph or Table as the desired view.

Control Channel EVM On Off:

When On, the EVM column is included to

display the EVM of each control channel. The EVM column is included for
either Bar Graph or Table displays.

Ng (1/6):

Determines the number of PHICH groups in a LTE sub-frame.

Back:

Press this submenu key to return to the

“Modulation Menu” on

page 6-38

Figure 6-36.

TD-LTE Control Channel Menu

Control Channels

Display Mode

Bar Graph Table

Control Channel

EVM

On Off

(1/6)

Back

Содержание 3GPP

Страница 1: ...556 For some models RF Demod and OTA are combined as a single option GSM GPRS EDGE Option 880 W CDMA HSPA Option 881 TD SCDMA HSPA Option 882 LTE LTE A FDD and TDD Option 883 Note Not all instrument m...

Страница 2: ...all not be reproduced copied or used in whole or in part as the basis for manufacture or sale of the equipment or software programs without the prior written consent of Anritsu Company Updates Updates...

Страница 3: ...GPRS EDGE Signal Analyzer 2 1 Introduction 2 1 2 2 Measurement Setup 2 2 2 3 GSM GPRS EDGE RF Measurements 2 2 2 4 Measurement Display 2 2 2 5 Demodulator 2 5 2 6 GSM GPRS EDGE Mode Pass Fail 2 7 Pass...

Страница 4: ...3 7 Channel Spectrum Setup 3 8 Channel Spectrum Procedure 3 8 ACLR Measurement Setup 3 9 ACLR Measurement Procedure 3 9 ACLR Multi channel ACLR Procedure 3 11 Spectral Emission Mask Setup 3 11 Spectra...

Страница 5: ...Fail Mode Menu 3 41 ScriptMaster Menu 3 41 3 13 Marker Menu 3 42 3 14 Sweep Menu 3 42 3 15 Measure Menu 3 43 3 16 Trace Menu 3 43 3 17 Limit Menu 3 43 3 18 Other Menus 3 43 Chapter 4 TD SCDMA HSPA Si...

Страница 6: ...ator Menu 4 24 Over The Air Menu 4 25 Pass Fail Mode Menu 4 26 4 12 Sweep Menu 4 27 4 13 Measure Menu 4 27 4 14 Trace Menu 4 27 4 15 Limit Menu 4 27 4 16 Other Menus 4 27 Chapter 5 LTE Signal Analyzer...

Страница 7: ...uency Menu 5 28 Standard List Menu 5 29 5 10 Amplitude Menu 5 30 5 11 Setup Menu 5 31 5 12 Measurements Menu 5 32 RF Menu 5 33 Modulation Menu 5 34 Power vs Resource Block Menu 5 35 Constellation Menu...

Страница 8: ...6 9 Constellation 6 10 Control Channel Power 6 11 Tx Time Alignment 6 11 Modulation Summary 6 11 Modulation Measurement Setups 6 12 6 5 TD LTE Over the Air OTA Measurements 6 17 Antenna Status 6 17 S...

Страница 9: ...nu 6 45 Carrier Aggregation Menu 6 46 Component Carrier Menu 6 47 EMF Menu 6 47 Pass Fail Test Menu 6 48 6 13 Marker Menu 6 49 Power vs Resource Block Marker Menu 6 50 6 14 Calibrate Menu 6 50 6 15 Sw...

Страница 10: ...tenna 8 1 8 3 LTE TD LTE EMF Menu 8 2 Meas Params Menu LTE TD LTE 8 3 RS Display Menu 8 4 P SS Display Menu 8 5 S SS Display Menu 8 6 Measurement Results LTE TD LTE 8 7 Pass Fail 8 9 8 4 W CDMA EMF Me...

Страница 11: ...Measurements requires Option 9 Option 40 GSM EDGE RF Measurements Option 41 GSM EDGE Demodulation W CDMA HSPA W CDMA HSPA signal analysis is described in Chapter 3 W CDMA HSPA Signal Analyzer Option...

Страница 12: ...A Modulation Measurements Option 546 LTE LTE A OTA Measurements requires Options 31 542 and 543 15 and 20 MHz bandwidth for full functionality TD LTE TD LTE signal analysis is described in Chapter 6...

Страница 13: ...asurement mode press Shift then the Mode 9 button to open the Mode Selector list box Highlight the desired measurement mode using the Up or Down arrow keys or the rotary knob and press Enter The list...

Страница 14: ...to the instrument User Guide for additional information 1 4 Contacting Anritsu To contact Anritsu visit the following URL and select the services in your region http www anritsu com contact us Figure...

Страница 15: ...trument can be directly connected to any GSM GPRS EDGE base station for accurate measurements When a physical connection is not available or required the instrument can receive and demodulate GSM GPRS...

Страница 16: ...submenu key and highlight Auto to select the GSM or EDGE signal 3 The instrument has automatic external reference frequency detection or if equipped activate GPS to get GPS High Accuracy frequency er...

Страница 17: ...GSM GPRS EDGE Signal Analyzer 2 4 Measurement Display 3GPP MG PN 10580 00234 Rev Y 2 3 Figure 2 1 GSM Single Channel Measurement Figure 2 2 GSM Multi Channel Measurement...

Страница 18: ...he Power versus Time Frame measurement Figure 2 3 To display Power versus Time Slot press the Power versus Time Slot submenu key to activate the Power versus Time Slot measurement Figure 2 4 The mask...

Страница 19: ...menu key and highlight Auto to automatically select the GSM or EDGE signal 4 The instrument has automatic external reference frequency detection or if equipped activate GPS to get GPS High Accuracy fr...

Страница 20: ...GSM GPRS EDGE Signal Analyzer 2 6 PN 10580 00234 Rev Y 3GPP MG To display the GSM EDGE Summary screen Figure 2 7 press the GSM EDGE Summary soft key Figure 2 6 EDGE Demodulator Measurement Figure 2 7...

Страница 21: ...s a custom test set can also be created and downloaded to the instrument All measurement parameters can be selected for pass fail testing Pass Fail Mode Procedure 1 Set the frequency as described in t...

Страница 22: ...me slots in a frame BSIC NCC BCC This is the Base Station Identity Code broadcasted on GSM systems The code consists of a Network Color Code NCC and a Base Station Color Code BCC Phase Err RMS deg The...

Страница 23: ...e undesired signal power interferer in dB This value is an estimate that is derived from the measured RMS EVM value This measurement is applicable to an EDGE signal only Modulation Type The modulation...

Страница 24: ...Range On Off Adjust Range Frequency Center Freq 1 000 GHz Signal Standard Channel Set CF To Closest Channel Decrement Channel Increment Channel Measurements Spectrum Power vs Time Frame Power vs Time...

Страница 25: ...equency and span for the first channel of the selected standard is automatically tuned Other settings such as channel spacing and integration bandwidth are also automatically entered Appendix A contai...

Страница 26: ...external loss For example entering 1 0 dB in Ext Gain is the same as 1 0 db of Ext Loss By default the instrument will automatically change attenuation preamplifier and digital gain settings to make...

Страница 27: ...s 8PSK modulation EVM rms EVM pk Orgin Offset C I are not measured for GSM signals shows N A on the display Pass Fail Mode Opens the Pass Fail Mode Menu on page 2 16 Displays the Pass Fail measurement...

Страница 28: ...E channels Opens the MC Spectrum Menu shown below Channel Cursor Select Channel Cursor to place the cursor at a specific channel location Use the rotary knob or the Up Down arrow keys to select the ch...

Страница 29: ...3GPP MG PN 10580 00234 Rev Y 2 15 Demodulator Menu Key Sequence Measurements Demodulator I Q View Allows selection between Vector or Const Back Returns to the Measurements Menu Figure 2 15 GSM GPRS E...

Страница 30: ...ctions are loaded into the instrument and the ScriptMaster menu is listed Start Test Begins running the instructions listed in ScriptMaster Change File Header Opens the Pass Fail Test File Header entr...

Страница 31: ...enu This menu is not available in GMS GPRS EDGE measurement mode 2 18 Other Menus Preset File Mode and System are described in the instrument User Guide Sweep Continuous Single This submenu key toggle...

Страница 32: ...2 18 Other Menus GSM GPRS EDGE Signal Analyzer 2 18 PN 10580 00234 Rev Y 3GPP MG...

Страница 33: ...the air or directly To measure a W CDMA signal over the air connect the appropriate frequency band antenna to the RF In connector To connect the node B equipment directly connect the power amplifier...

Страница 34: ...power Colors are applied according to Table 3 1 Note Use an applicable band pass filter to eliminate out of band signals that can cause mixer saturation Table 3 1 Channel Power Colors Parameter Descri...

Страница 35: ...to the external frequency reference accuracy and is typically useful only with a good external frequency reference Codogram When Codogram is selected the screen displays the changes in code power leve...

Страница 36: ...is displayed in text only displays and in OTA measurement displays Pilot Dominance The strength of the strongest pilot compared to the next strongest pilot in the same channel This should be 10 dB in...

Страница 37: ...W CDMA system the number of chips per data symbol is called the Spreading Factor The lower the spreading factor the higher the data rate According to the 3GPP standard the spreading factor can vary fr...

Страница 38: ...t the threshold level 1 Press the Setup main menu key then press More 2 Press the Threshold submenu key and select Auto or Manual 3 To set the threshold level manually press the Manual Threshold subme...

Страница 39: ...nal arrow keys or the rotary knob The Channel Number can also be directly entered using the numerical keypad Band Spectrum Procedure 1 Set the measurement frequency by using one of the methods listed...

Страница 40: ...um is selected the unit automatically displays the measurements for the selected signal Channel Spectrum Procedure 1 Press the Setup main menu key 2 The instrument has automatic external reference fre...

Страница 41: ...z 5 MHz and 10 MHz and the channels are color coded The 3GPP standard requires the adjacent channel power leakage ratio to be better than 45 dB at 5 MHz offset and 50 dB at 10 MHz offset ACLR measurem...

Страница 42: ...nd select one main channel and two adjacent channels Figure 3 3 Note The ACLR measurement uses the filtered channel power to determine the ACLR values and it is listed as filtered on the display In al...

Страница 43: ...s Enter In Figure 3 4 four channels were selected Spectral Emission Mask Setup The Spectral Emission Mask displays the selected signal and the mask as defined in the 3GPP specification The mask varies...

Страница 44: ...edure 1 Set the measurement frequency using one of the methods listed in the User Guide 2 Press the Measurements main menu key 3 Press the RF Measurements submenu key 4 Press the Spectral Emission Mas...

Страница 45: ...ary The RF Summary displays the critical transmitter performance measurements in the table format without demodulating the W CDMA HSPA signal The parameters displayed in the RF summary table are Chann...

Страница 46: ...Setup The Code Domain Power CDP display includes spreading factor OVSF codes 256 or 512 with zoom in on codes The instrument can zoom to 32 64 and 128 codes and the user can input the zoom code to st...

Страница 47: ...the S CCPCH Code submenu key to enter the correct S CCPCH code The default S CCPCH code of 3 will be displayed in all the views Set the S CCPCH code to show accurate results 8 Press the PICH Code subm...

Страница 48: ...rlined marker number is the currently selected marker 3 Press the On Off submenu key to activate the selected marker 4 Press the Marker Table submenu key to display the Marker table The marker table i...

Страница 49: ...t HSPA Procedure 1 Press the Demodulator submenu key to list the Demod menu 2 Press the HSPA submenu key to activate the HSPA measurement The red dot on the submenu key indicates HSPA is selected 3 Pr...

Страница 50: ...ocedure 1 Set the measurement frequency using one of the methods listed in the User Guide 2 Press the Setup main menu key 3 Press the Scrambling Code submenu key to select Auto so that the scrambling...

Страница 51: ...ate zoom level The Zoom key toggles between 32 64 and 128 13 Press the Zoom Start submenu key to manually enter the zoom start code 14 Press the Total Time or Single Sweep Time submenu key to set the...

Страница 52: ...t By submenu key can display the scrambling codes sorted by Power or Code OTA Procedure 1 Connect the appropriate antenna to the RF In connector to make OTA measurements 2 Set the measurement frequenc...

Страница 53: ...W CDMA HSPA Signal Analyzer 3 6 Over the Air Measurements 3GPP MG PN 10580 00234 Rev Y 3 21 Figure 3 11 OTA Measurement Summary...

Страница 54: ...eference to the RF In BNC connector and wait for the unit to recognize the external reference and lock to it 6 Press the S CCPCH Spread submenu key to manually set the S CCPCH spreading The default S...

Страница 55: ...ar PASS or FAIL indications that include min max threshold Using Master Software Tools a custom test list can be created and downloaded into the instrument All critical parameters can be selected for...

Страница 56: ...easurements Pass Fail Mode WCDMA Summary Save Measurement OTA RF Measurements Band Spectrum Channel Spectrum Back ACLR Spectral Emission Mask RF Summary Spectral Emission Summary Back Band Spectrum Re...

Страница 57: ...il Test Back ScriptMaster Change File Header Test_Seq_1 Start Test Exit Reset Skip G OTA Setup Scrambling Code Manual Auto Manual Code 1 2 3 4 5 6 On Off Code Lock On Off Display Unit CPICH EC Io Sort...

Страница 58: ...er frequency and span for the first channel of the selected standard is automatically tuned Other settings such as channel spacing and integration bandwidth are also automatically entered Appendix A c...

Страница 59: ...he keypad the submenu keys will change to Units keys dB of External Loss and External Gain as illustrated on the left below the Amplitude menu Enter a value then press the appropriate Units key to mak...

Страница 60: ...een 256 codes and 512 codes S CCPCH Spread Press the S CCPCH Spread submenu key to enable the S CCPCH spreading factor and enter the desired code The default value is 256 S CCPCH Code Press the S CCPC...

Страница 61: ...of the base station CPICH Pwr Sets the power of the CPICH Freq Err Avg Turns on averaging for the frequency error measurement Freq Err Avg Cnt Sets the number of measurements to use in the frequency...

Страница 62: ...ents can be selected for pass fail testing including each individual code power spreading factor and symbol EVM The results are displayed in table format with clear identification of pass fail results...

Страница 63: ...ss once to select the Adjacent Channel Leakage Ratio ACLR display The user can set the main channels and adjacent channels from 1 channel to 4 channels This screen can display up to 12 channels total...

Страница 64: ...e the cursor to select the required channel to analyze the selected channel signal Previous Band Selects the previous band Next Band Selects the next band Back Returns to the RF Measurement Menu on pa...

Страница 65: ...he main channels from 1 channel to 4 channels Select of Adjacent Channels Set the adjacent channels from 1 channel to 4 channels Channel Width Set the bandwidth for the channels for the number of adja...

Страница 66: ...r power and Symbol EVM CDP Table Displays the following Code Domain Power CDP parameters in table format Code Status EVM Mod Type Power dB and Power dBm HSPA Open the HSDPA Menu on page 3 36 When HSPA...

Страница 67: ...a zoom function of 32 64 or 128 codes Zoom Start Enter the required zoom start code For example to start at code 2 enter 2 Control Channels Select a control channel mode between Rel Abs and Delta Bac...

Страница 68: ...ed code Next Active Code Right Select the next active code to the right of the selected code Total Time Set the time for the power versus time screen The maximum total time is 72 hours Single Sweep Ti...

Страница 69: ...2 Total Time Use the keypad arrow keys or the rotary knob to enter the total time to display the changes in code power levels The maximum total time for Codogram is 72 hours Single Sweep Time Single...

Страница 70: ...page 3 39 Multipath Opens the Multipath Menu on page 3 40 EMF Option 444 only When first selected this submenu key enables the EMF Measurement mode Once the EMF Measurement mode is active this key ope...

Страница 71: ...he manually selected scrambling code Code Lock Lock the measured codes Display Unit Display the codes by CPICH or Ec Io Sort By Sort the measured codes by code numbers or power Code Lock Reset Reset t...

Страница 72: ...anual or auto Manual Scrambling Code Sets the manual scrambling code Vert Display Switch vertical display between RSCP and Rel Pwr Horiz Display Switch between Chips and uSec for the horizontal displa...

Страница 73: ...menu keys Recall a Script file created in Master Software Tools from the window The ScripMaster instructions are loaded into the instrument and the ScriptMaster menu is listed Start Test Begins the ru...

Страница 74: ...to be displayed below the sweep window The table is automatically sized to display all markers that are turned on In addition to the marker frequency and amplitude the table also shows delta frequenc...

Страница 75: ...re Menu Displays the Measurements Menu on page 3 30 3 16 Trace Menu This menu is not available in W CDMA HSPA measurement mode 3 17 Limit Menu This menu is not available in W CDMA HSPA measurement mod...

Страница 76: ...3 18 Other Menus W CDMA HSPA Signal Analyzer 3 44 PN 10580 00234 Rev Y 3GPP MG...

Страница 77: ...lect the TD SCDMA HSPA Signal Analyzer mode set up frequency and amplitude and perform file management 4 3 TD SCDMA HSPA RF Measurements The following parameters are measured in the RF Measurement mod...

Страница 78: ...t is used as the peak Left Channel Power The channel power of the 1 6 MHz channel left of the main channel This is useful in the multi carrier environments Right Channel Power The channel power of the...

Страница 79: ...elect the desired setting Auto QPSK 8PSK 16QAM or 64QAM d If the channel in use has a known DwPTS signal select On If the channel in use does not have a DwPTS signal select Off If the presence of the...

Страница 80: ...window opens Select the desired setting Auto QPSK 8PSK 16QAM or 64QAM g If the channel in use has a known DwPTS signal select On If the channel in use does not have a DwPTS signal select Off If the pr...

Страница 81: ...A HSPA Signal Analyzer 4 3 TD SCDMA HSPA RF Measurements 3GPP MG PN 10580 00234 Rev Y 4 5 Figure 4 2 TD SCDMA HSPA Power vs Time Sub Frame Measurement Figure 4 3 TD SCDMA HSPA Power vs Time Slot Measu...

Страница 82: ...igger submenu key The Trigger menu opens 1 Press the Trigger Type submenu key to toggle through the three trigger types No Trig GPS and Ext The active state is underlined on the face of the submenu ke...

Страница 83: ...ownlink Pilot slot excluding the gap Noise Floor Noise floor is the average of inactive codes powers dB from the code domain power CDP Freq Error Frequency error is the difference between the received...

Страница 84: ...The Slot Selection window and menu open In the list window use the rotary knob or press the touch screen to highlight Auto or the desired slot 0 to 6 then press the Enter key b Press the Trigger subm...

Страница 85: ...ubmenu key to return to Demodulator menu 6 Press the Back submenu key again to return to the Measurements menu Modulation Summary The Modulation Summary displays the critical Modulation transmitter pe...

Страница 86: ...also displayed next to each code for easy reference Tau Scan Displays the code power versus Tau in a bar graph format The horizontal axis Tau has dynamic scale The six strongest SYNC DL codes are dis...

Страница 87: ...r Polarity submenu key to select either Rising or Falling trigger edge c If necessary press the Tau Offset submenu key to specify a Tau Offset value The maximum offset value is 5 sec d Press the Back...

Страница 88: ...nts main menu key 2 Press the Pass Fail submenu key to activate the test 3 Press the Pass Fail submenu key again to display the Pass Fail menu 4 Press the Select Pass Fail Test submenu key Use the arr...

Страница 89: ...357 Set CF To Closest Channel Decrement Channel Increment Channel Setup Slot Selection Trigger Uplink Switch Point 3 SYNC DL Code Scrambling Midamble Code Max Users Meas Speed Fast Norm Slow More Back...

Страница 90: ...ame Slot Slot Selection Demodulator CDP Data Modulation Summary CDP Table Back CDP Data CDP Units Relative Absolute Back Back Record Off On Run Hold Hold Run Pass Fail Mode Select Pass Fail Test Back...

Страница 91: ...ressing the Enter key has the same effect as pressing the MHz submenu key Signal Standard Opens the Signal Standards list box in order to select signal standard Channel Opens the Channel Editor list b...

Страница 92: ...ad Note When using the keypad the submenu keys will change to Units keys dB of External Loss and External Gain as illustrated on the left below the Amplitude menu Enter a value then press the appropri...

Страница 93: ...he SYNC DL Code selection window Use the rotary knob or press the touch screen to highlight the desired code 0 through 31 then press Enter If Auto is selected the active SYNC DL code is applied Scramb...

Страница 94: ...re 4 13 TD SCDMA HSPA Slot Selection Menu Trigger Type Select a trigger type by pressing this submenu key to toggle among No Trig GPS or Ext The active state is underlined on the face of the submenu k...

Страница 95: ...Automatically looks for the Scrambling Midamble code Auto in the Scrambling Midamble Code selection window and the Auto submenu key have the same function The Auto submenu key provides a one touch me...

Страница 96: ...ou are unsure DwPTS If the channel in use has a known DwPTS signal select On If the channel in use does not have a DwPTS signal then select Off If the presence of the DwPTS is unknown select Auto Tau...

Страница 97: ...nu key again to display the Pass Fail Mode Menu on page 4 26 and set up pass fail testing TD SCDMA Summary Press this submenu key to display a table of the TD SCDMA measurements The following measurem...

Страница 98: ...is displayed in dBm or watts depending on unit selection Power vs Time Opens the Power vs Time Menu on page 4 23 Spectrum Emission Changes the display for Spectrum Emission measurement RF Summary Pre...

Страница 99: ...o 6 then press Enter If Auto is selected the active slot will be detected automatically Auto Automatically looks for an active downlink slot Auto in the Slot Selection window and the Auto submenu key...

Страница 100: ...o the Demodulator menu CDP Table Press this submenu key to display a table of the CDP Code Mod Type Power dB and Power dBm Modulation Summary Press this submenu key to view the performance of the tran...

Страница 101: ...f a log file is flashed on the screen This is the file in which all recorded data is stored Selecting Off stops all recording and closes the log file When pressed again recording begins in a new file...

Страница 102: ...r press the touch screen to highlight the desired test PASS_FAIL_RF PASS_FAIL_DEMOD or PASS_FAIL_ALL then press the Select Test submenu key Press Esc to return to the Pass Fail Mode menu without initi...

Страница 103: ...e Mode and System are described in the User Guide Sweep Hold Run Press this submenu key to toggle between Run mode and Hold mode Hold mode prevents the instrument from taking any new measurements and...

Страница 104: ...4 16 Other Menus TD SCDMA HSPA Signal Analyzer 4 28 PN 10580 00234 Rev Y 3GPP MG...

Страница 105: ...file management In addition perform the following LTE specific setup procedures 1 Press the Setup main menu key 2 Press the BW submenu key to open the Select Bandwidth list Select the desired Bandwidt...

Страница 106: ...he base station The Cell ID field is automatically populated with the last measured Cell ID for user convenience 5 Press Back to return to the Setup main menu Antenna Status The Antenna Status indicat...

Страница 107: ...r and the power of two adjacent channels on each side as a bar graph For example when BW is set to 10 MHz the channel spacing is 20 MHz 10 MHz 10 MHz and 20 MHz and the channels are color coded Spectr...

Страница 108: ...rements main menu key 2 Press the RF submenu key 3 Press the Channel Spectrum submenu key to activate this RF measurement view Figure 5 2 4 Press the Channel Spectrum submenu key again to select the C...

Страница 109: ...Rev Y 5 5 ACLR 1 Press the Measurements main menu key 2 Press the RF submenu key 3 Press the ACLR submenu key to activate ACLR display and measurement Figure 5 3 4 Press the Back submenu key to return...

Страница 110: ...ectral Emission measurement and display Figure 5 4 4 Press the Spectral Emission Mask submenu key again to list the Spectral Emission menu and set up its parameters Refer to Figure 5 26 LTE RF Menu on...

Страница 111: ...5 7 RF Summary 1 Press the Measurements main menu key 2 Press the RF submenu key 3 Press the RF Summary submenu key to activate and display the RF measurements in table format Figure 5 5 4 Press the B...

Страница 112: ...them manually or by pressing Autoscale Color Map Measurements Table Active RBs The number of active Resource Blocks A RB is determined to be active if the measured PDSCH power is above a certain thre...

Страница 113: ...t number is the maximum EVM rms value since Reset and the second number is the current measured value Reset occurs when setup parameters are changed or by toggling the EVM Max Hold button Freq Error T...

Страница 114: ...me synchronization and cell identity It contains information needed for cell search PBCH Power Physical Broadcast Channel Power This physical channel carries system information for user equipment UE r...

Страница 115: ...ower vs Resource Block submenu key again to display the Power versus RB menu for setting up the RB Color Map maximum value and range Press a submenu key to change the desired parameter or press the Au...

Страница 116: ...and move it to the desired sub frame using the arrow buttons rotary knob or enter the sub frame number and press Enter Constellation 1 Press the Measurements main menu key 2 Press the Modulation subme...

Страница 117: ...ain menu key 2 Press the Modulation submenu key 3 Press the Control Channel Power submenu key to activate the Control Channel Power display Figure 5 8 Press the key again to view or change the Display...

Страница 118: ...tion measurement to Tx Time Alignment view The instrument display lists the Time Alignment measurement results and the TAE values for each antenna pair See Figure 5 9 If your instrument is loaded with...

Страница 119: ...ummary 1 Press the Measurements main menu key 2 Press the Modulation submenu key 3 Press the Modulation Summary submenu key to activate and display the modulation measurements in table format Figure 5...

Страница 120: ...gnal is used to obtain frame synchronization and cell identity S SS Power contains information needed for cell search RSRP Reference Signal Received Power provides the UE with essential information ab...

Страница 121: ...ndwidth BW This is the set bandwidth of the Component Carrier Cyclic Prefix CP The length of Cyclic Prefix can be specified as either Normal or Extended MIMO Multiple input multiple output technology...

Страница 122: ...ponent Carriers The 3GPP specification identifies the limits of the delays for the system to operate properly Cell ID Cell identifying information sent by the transmitter in the sync signal EMF Option...

Страница 123: ...e Over the Air menu Tx Test 1 Press the Measurements main menu key 2 Press the Over the Air submenu key 3 Press the Tx Test submenu key to activate the OTA Tx Test display See Figure 5 13 on page 5 20...

Страница 124: ...Air menu Mapping Refer to Chapter 7 LTE and TD LTE Coverage Mapping Note When Show Mod Results is on the Tx Test measurement speed is slower due to the additional time required to demodulate the stron...

Страница 125: ...submenu key 3 Press the Carrier Aggregation submenu key to display the OTA Carrier Aggregation table Press the key again to display the Carrier Aggregation menu See Figure 5 14 4 Press one of the five...

Страница 126: ...Fail test a Press the Select Pass Fail Test submenu key to open the Select Pass Fail Test window Highlight the desired test with the arrow keys or rotary knob and press Enter to start the test Refer...

Страница 127: ...frequency Channel Power Channel power measures the average power within the selected bandwidth and is expressed in dBm or Watts Ref Signal RS Power Reference Signal power displayed in dBm or Watts Th...

Страница 128: ...al Analyzer 5 24 PN 10580 00234 Rev Y 3GPP MG Measurement Setup 1 Press the Measurements main menu key 2 Press the LTE Summary submenu key to activate and display the LTE measurements in table format...

Страница 129: ...r State Off On Modulation Setup BW 10 MHz EVM Mode Auto PBCH Only RF Back V W X Y V U Freq Err Avg Cnt 1 Back Channel Spectrum Span 10 MHz Category A B Opt 1 Summary Table Off On Spectral Emission Bac...

Страница 130: ...On Off Sort By SS Power Show Mod Results On Off Control Channel EVM On Off Show Mod Results On Off OTA Scanner Bar Graph OTA Tx Test Back Tx Test Bar Graph SS Power Mapping Control Channel Power Ng 1...

Страница 131: ...PN 10580 00234 Rev Y 5 27 LTE Menus continued Figure 5 19 LTE Menu Layout 3 of 3 Carrier Aggregation Z CC1 CC2 CC3 Center Freq 1 000 GHz Channel Set CF To Closest Channel CC1 Back Back CC5 CC4 TAE Of...

Страница 132: ...list box in order to select a channel number within the range of the selected signal standard Set CF to Closest Channel Moves the center frequency to the closest frequency that matches a channel numbe...

Страница 133: ...andard list is displayed these signal standard will be marked as favorites in the Fav column Top of List Press this submenu key to display the first signal standard in the list Page Up Press this subm...

Страница 134: ...ternal Gain as illustrated on the left below the Amplitude menu Enter a value then press the appropriate Units key to make your selection A negative offset value in external gain equates to the same a...

Страница 135: ...l present in the transmitter under test If RS is chosen and a sync signal is present no modulation measurements will be available Cell ID Identifying information sent by the transmitter in the sync si...

Страница 136: ...Menu on page 5 44 and set up pass fail testing LTE Summary Press this submenu key to display a table of the LTE measurements The following measurement values are displayed in the table Freq Error Occ...

Страница 137: ...hich are automatically selected based on the current carrier frequency channel and BW values The instrument indicates if the signal is within the specified limits by displaying PASS or FAIL The emissi...

Страница 138: ...ontrol Channel Power Press the Control Channel Power submenu key to set the display as bar graph or table Tx Time Alignment Press to set the modulation measurement to Tx Time Alignment view Refer to T...

Страница 139: ...more time to display this menu Autoscale Color Map Adjusts the RB Max Value and Range automatically on the color map RB Color Map Max Value Press to adjust the RB Color Map Max Value manually RB Color...

Страница 140: ...box in the top right corner of the constellation graph On is the default state Back Press this submenu key to return to the Modulation Menu on page 5 34 The constellations are color coded as follows Q...

Страница 141: ...rol Channel EVM On Off When On the EVM column is included to display the EVM of each control channel The EVM column is included for either Bar Graph or Table displays Ng 1 6 Determines the number of P...

Страница 142: ...Mapping Carrier Aggregation Press this submenu key to display the Carrier Aggregation Component Carrier frequencies and measured parameters In the Carrier Aggregation Menu select the desired Component...

Страница 143: ...submenu key to automatically save measurement records The instrument logs a data record at the end of each measurement cycle A maximum of 10 000 records can be stored in a file When a file is full a n...

Страница 144: ...Test Show Mod Results When set to Off the PBCH Results table and Antenna Status indicators are not displayed When set to On the Antenna Status and PBCH Modulation Results table are displayed Back Pres...

Страница 145: ...t Distance Time Setup Menu on page 7 15 Back Returns to the Over the Air Menu on page 5 38 Start Stop Data Collection Press this main menu key to start coverage mapping data collection based on Measur...

Страница 146: ...arrier Aggregation to other measurements the frequency is automatically set to the currently selected Component Carrier if it is on TAE Time Alignment Error TAE is a measurement of the differential tr...

Страница 147: ...change to Units GHz MHz kHz and Hz In this case enter the desired value then press the desired unit submenu key or press Enter to select MHz as the frequency unit Signal Standard Opens the Standard Li...

Страница 148: ...IL_ALL Highlight the desired test with the arrow keys or rotary knob and press Enter to start the test or press Esc to cancel your choice Note The current list of pass fail tests is a default list Mas...

Страница 149: ...ubmenu key moves the underline to the other marker Marker State Sets the state of the selected marker underlined in the Marker Select submenu Marker Edit Displays when the Market State submenu is set...

Страница 150: ...ubmenu is set to Delta Toggles between activating the Reference or Delta marker Peak Search Moves the selected marker to the trace peak Markers Off Turns off all markers Back Press this submenu key to...

Страница 151: ...10580 00234 Rev Y 5 47 5 17 Trace Menu This menu is not available in LTE measurement mode 5 18 Limit Menu This menu is not available in LTE measurement mode 5 19 Other Menus Preset File Mode and Syst...

Страница 152: ...5 19 Other Menus LTE Signal Analyzer 5 48 PN 10580 00234 Rev Y 3GPP MG...

Страница 153: ...w keys or rotary knob and press Enter 3 Press the EVM Max Hold submenu key On to display both the Maximum EVM value since Reset and the current measured value This applies to EVM RMS and Peak values S...

Страница 154: ...wer measures the average power within the selected bandwidth and is expressed in dBm or Watts Occupied BW The measured occupied bandwidth is calculated as the bandwidth containing 99 of the total inte...

Страница 155: ...20 MHz 10 MHz 10 MHz and 20 MHz and the channels are color coded Spectral Emission Mask The Spectral Emission Mask SEM measurement supports the testing for Operating Band Unwanted Emissions described...

Страница 156: ...asurements main menu key 2 Press the RF submenu key 3 Press the Channel Spectrum submenu key to activate this RF measurement view Figure 6 2 4 Press the Channel Spectrum submenu key again to select th...

Страница 157: ...1 Press the Measurements main menu key 2 Press the RF submenu key 3 Press the Power vs Time submenu key to select measurement 4 Press the Power vs Time submenu key again to set the View and Sub Frame...

Страница 158: ...ev Y 3GPP MG ACLR 1 Press the Measurements main menu key 2 Press the RF submenu key 3 Press the ACLR submenu key to activate ACLR display and measurement Figure 6 4 4 Press the Back submenu key to ret...

Страница 159: ...sion Mask submenu key to activate the Spectral Emission measurement and display Figure 6 5 4 Press the Spectral Emission Mask submenu key again to list the Spectral Emission menu and set up its parame...

Страница 160: ...GPP MG RF Summary 1 Press the Measurements main menu key 2 Press the RF submenu key 3 Press the RF Summary submenu key to activate and display the RF measurements in table format Figure 6 6 4 Press th...

Страница 161: ...pressing Autoscale Color Map Measurements Table Active RBs The number of active Resource Blocks in sub frame 0 An RB is determined to be active if the measured PDSCH power is above a certain threshold...

Страница 162: ...s On Setup menu two values are displayed The first number is the maximum EVM rms value since Reset and the second number is the current measured value Reset occurs when setup parameters are changed or...

Страница 163: ...l identity It contains information needed for cell search PBCH Power Physical Broadcast Channel Power This physical channel carries system information for user equipment UE requiring access to the net...

Страница 164: ...Press the Power vs Resource Block submenu key again to display the Power vs RB menu and set up the RB Color Map max value and range Press a submenu key to change the desired parameter or press the Aut...

Страница 165: ...me and move it to the desired sub frame using the arrow buttons rotary knob or enter the sub frame number and press Enter Constellation 1 Press the Measurements main menu key 2 Press the Modulation su...

Страница 166: ...enu key 2 Press the Modulation submenu key 3 Press the Control Channel Power submenu key to activate the Control Channel Power display in table format Figure 6 9 Press the key again to view or change...

Страница 167: ...ubmenu key 3 Press the Tx Time Alignment submenu key to set the modulation measurement to Tx Time Alignment view Figure 6 10 If your instrument is loaded with older firmware that does not support 4x4...

Страница 168: ...n Summary 1 Press the Measurements main menu key 2 Press the Modulation submenu key 3 Press the Modulation Summary submenu key to activate and display the modulation measurements in table format Figur...

Страница 169: ...nce of up to 6 cell IDs and the following measurements Cell ID Sector ID Group ID Identifying information sent by the transmitter in the sync signal S SS Power Secondary Sync Signal power is displayed...

Страница 170: ...ignal components Frequency This is the set center frequency Bandwidth BW This is the set bandwidth of the Component Carrier Cyclic Prefix CP The length of Cyclic Prefix can be specified as either Norm...

Страница 171: ...Carriers The 3GPP specification identifies the limits of the delays for the system to operate properly Cell ID Cell identifying information sent by the transmitter in the sync signal EMF Option 444 on...

Страница 172: ...eturn to the Over the Air menu Tx Test 1 Press the Measurements main menu key 2 Press the Over the Air submenu key 3 Press the Tx Test submenu key to activate the OTA Tx Test display Figure 6 14 on pa...

Страница 173: ...Air menu Mapping Refer to Chapter 7 LTE and TD LTE Coverage Mapping Note When Show Mod Results is on the Tx Test measurement speed is slower due to the additional time required to demodulate the stro...

Страница 174: ...ir submenu key 3 Press the Carrier Aggregation submenu key to display the OTA Carrier Aggregation table Press the key again to display the Carrier Aggregation menu See Figure 6 15 4 Press one of the f...

Страница 175: ...ss Fail test a Press the Select Pass Fail Test submenu key to open the Select Pass Fail Test window Highlight the desired test with the arrow keys or rotary knob and press Enter to start the test Refe...

Страница 176: ...ing center frequency Channel Power Channel power measures the average power within the selected bandwidth and is expressed in dBm Ref Signal RS Power Reference Signal power displayed in dBm or Watts T...

Страница 177: ...TE Summary 3GPP MG PN 10580 00234 Rev Y 6 25 Measurement Setup 1 Press the Measurements main menu key 2 Press the TD LTE Summary submenu key to activate and display the TD LTE measurements in table fo...

Страница 178: ...nnel Spectrum Span 10 MHz Marker Marker Select M1 M2 Marker State Off On Delta Marker Edit Reference Delta Peak Search Markers Off C Sync Sync Type Normal SS RS Cell ID 0 A Standard List Display All F...

Страница 179: ...r Auto Save On Off Sort By SS Power Show Mod Results On Off Control Channel EVM On Off Show Mod Results On Off OTA Scanner Bar Graph OTA Tx Test Back Tx Test Bar Graph SS Power Mapping Control Channel...

Страница 180: ...10580 00234 Rev Y 3GPP MG TD LTE Menus continued Figure 6 20 TD LTE Menu Layout 3 of 3 Carrier Aggregation H CC1 CC2 CC3 Center Freq 1 000 GHz Channel Set CF To Closest Channel CC1 Back Back CC5 CC4...

Страница 181: ...Channel Editor list box in order to select a channel number within the range of the selected signal standard Set CF to Closest Channel Moves the center frequency to the closest frequency that matches...

Страница 182: ...ndard list is displayed these signal standard will be marked as favorites in the Fav column Top of List Press this submenu key to display the first signal standard in the list Page Up Press this subme...

Страница 183: ...ternal Gain as illustrated on the left below the Amplitude menu Enter a value then press the appropriate Units key to make your selection A negative offset value in external gain equates to the same a...

Страница 184: ...t and the constellation measurement will only show QPSK The instrument will automatically choose PBCH Only mode when the OTA Scanner is used Sync Press this key to open the Sync Menu on page 6 33 Freq...

Страница 185: ...enna Select the antenna 1 through 3 in a 4x4 MIMO system that does not receive a sync signal Antenna 0 must receive a sync signal This selection is applicable only in RS Sync Type Back Press this subm...

Страница 186: ...nu on page 6 48 and set up pass fail testing TD LTE Summary Press this submenu key to display a table of the TD LTE measurements The following measurement values are displayed in the table Freq Error...

Страница 187: ...37 The Spectral Emission Mask measurement supports the testing for Operating Band Unwanted Emissions described in the 3GPP TS 36 141 Base Station Conformance testing document There is support for Cate...

Страница 188: ...list to select a frequency span or Auto Back Returns to the RF Menu on page 6 35 Figure 6 30 TD LTE Channel Spectrum Menu View Press to select either Frame or Sub Frame Sub Frame Number If Sub Frame...

Страница 189: ...he information on page 6 35 Select Mask Auto Displays a list of standard and custom masks for use in SEM measurements Select Auto Select if the desired mask is unknown Summary Table Displays the Spect...

Страница 190: ...ss the Control Channel Power submenu key to set the display as bar graph or table Refer to the Control Channel Power Menu on page 6 41 Tx Time Alignment Press to set the modulation measurement to Tx T...

Страница 191: ...more time to display this menu Autoscale Color Map Adjusts the RB Max Value and Range automatically on the color map RB Color Map Max Value Press to adjust the RB Color Map Max Value manually RB Color...

Страница 192: ...box in the top right corner of the constellation graph On is the default state Back Press this submenu key to return to the Modulation Menu on page 6 38 The constellations are color coded as follows Q...

Страница 193: ...rol Channel EVM On Off When On the EVM column is included to display the EVM of each control channel The EVM column is included for either Bar Graph or Table displays Ng 1 6 Determines the number of P...

Страница 194: ...ng Press it again to set the coverage mapping parameters Save Recall Points Map Measurement Setup and Point Distance Time Setup For full details refer to Chapter 7 LTE and TD LTE Coverage Mapping Carr...

Страница 195: ...his submenu key to automatically save measurement records The instrument logs a data record at the end of each measurement cycle A maximum of 10 000 records can be stored in a file When a file is full...

Страница 196: ...st Show Mod Results When set to Off the PBCH Results table and Antenna Status indicators are not displayed When set to On the Antenna Status and PBCH Modulation Results table are displayed Back Press...

Страница 197: ...nt Distance Time Setup Menu on page 7 15 Back Returns to the Over the Air Menu on page 6 42 Start Stop Data Collection Press this main menu key to start coverage mapping data collection based on Measu...

Страница 198: ...Carrier Aggregation to other measurements the frequency is automatically set to the currently selected Component Carrier if it is on TAE Time Alignment Error TAE is a measurement of the differential...

Страница 199: ...ls change to Units GHz MHz kHz and Hz In this case enter the desired value then press the desired unit submenu key or press Enter to select MHz as the frequency unit Signal Standard Opens the Standard...

Страница 200: ..._ALL Highlight the desired test with the arrow keys or rotary knob and press Enter to start the test or press Esc to cancel your choice Note The current list of pass fail tests is a default list Maste...

Страница 201: ...rker Marker State Sets the state of the selected marker underlined in the Marker Select submenu Marker Edit Displays when the Market State submenu is set to Delta Toggles between activating the Refere...

Страница 202: ...between activating the Reference or Delta marker Peak Search Moves the selected marker to the trace peak Markers Off Turns off all markers Back Press this submenu key to return to Measurements Menu on...

Страница 203: ...16 Measure Menu Displays the Measurements Menu on page 6 34 6 17 Trace Menu This menu is not available in TD LTE measurement mode 6 18 Limit Menu This menu is not available in TD LTE measurement mode...

Страница 204: ...6 19 Other Menus TD LTE Signal Analyzer 6 52 PN 10580 00234 Rev Y 3GPP MG...

Страница 205: ...file and then later combine the data file with a map Coverage Mapping is possible both outdoors GPS signal required and indoors no GPS signal For more accurate position data for indoor measurements u...

Страница 206: ...de data is automatically saved for each location Indoor Coverage With GPS turned off and a non GeoEmbedded map file the user indicates the current position with the touchscreen On instruments that do...

Страница 207: ...are two Anritsu Map File formats legacy map map files azm map files which are displayed in full zoom out view pan and zoom is currently not supported in Coverage Mapping Download easyMap Tools from th...

Страница 208: ...tellites When it does the GPS icon at the top of the screen turns green Refer to your instrument User Guide for additional information on GPS Recall a Map The instrument allows you to recall a map fil...

Страница 209: ...ater time with a map You may also recall a map after taking the data without having to save and recall it Alternatively you can save the KML points and view them in Google Earth or Google Maps or you...

Страница 210: ...ameters Press the Point Distance Time Setup submenu button to open the Points Distance Time menu If Time is selected for Repeat Type then set the time period by pressing the Repeat Time submenu key If...

Страница 211: ...ation and time based on GPS information Cell Group and Sector ID Center Frequency Measured signals S SS RSRP RSRQ and SINR The kml file can be recalled and viewed on the instrument Refer to Mapping Sa...

Страница 212: ...and look for the kml file you want to view in Google Earth See Figure 7 4 3 Click the map file name in the File column Alternatively you can select the checkbox next to the kml file name then click t...

Страница 213: ...lso view the file with Google Maps provided you have the appropriate plug in for your browser Save Tab Delimited Points In the Coverage Mapping submenu press Save Recall Points Map then Save Tab Delim...

Страница 214: ...MG Save JPG In the Coverage Mapping submenu press Save Recall Points Map then Save JPG In the Save dialog change the file name as appropriate then press Enter A jpg file of the current screen is saved...

Страница 215: ...Distance 10 00 m Delete ALL Points A B C D E Repeat Type Time Distance Distance Units m ft Start Data Collection Over the Air Scanner Tx Test Mapping Mapping Parameter A S SS Power RSRP RSRQ SINR Bac...

Страница 216: ...Setup Menu on page 7 15 Back Returns to the Over the Air Menu on page 5 38 LTE or Over the Air Menu on page 6 42 TD LTE Start Stop Data Collection Press this main menu key to start collection of cover...

Страница 217: ...elect a different map type to recall Recall KML Points Only Opens the Recall submenu for selecting a kml file Displays the saved locations overlaid on the current map or the default grid Recall KML Po...

Страница 218: ...s desired Press the desired threshold level Use the arrows knob or numeric keypad to change its value Press Enter Press Back to return to the Measurement Setup Menu RSRQ Thresholds Opens the RSRQ Leve...

Страница 219: ...een measurements For indoor mapping GPS is Off the instrument interpolates position measurements in a straight line between each pair of screen tap locations Repeat Distance When the Repeat Type is Di...

Страница 220: ...7 5 Coverage Mapping Menu LTE and TD LTE Coverage Mapping 7 16 PN 10580 00234 Rev Y 3GPP MG...

Страница 221: ...used Refer to the isotropic antenna and signal analyzer technical data sheets 8 2 Connecting the Antenna 1 Connect the antenna RF connector to the Analyzer RF In port on the instrument See Figure 8 1...

Страница 222: ...000 The EMF test is fully executed when the specified number of measurements have completed Auto Logging On Off Auto Logging is On by default This must be selected prior to starting the measurements...

Страница 223: ...P SS Display Menu on page 8 5 S SS Meas Display Opens the S SS Display Menu on page 8 6 Extr Factor On Off Toggles On Off the Extrapolation Factor The extrapolation factor if turned On displays the e...

Страница 224: ...Actual Value current isotropic number RS Total Min Selects the display of Total Min which is the minimum value for the entire measurement period Measurement Time Number of Measurements RS Total Max Se...

Страница 225: ...ctual Value current isotropic number P SS Total Min Selects the display of Total Min which is the minimum value for the entire measurement period Measurement Time Number of Measurements P SS Total Max...

Страница 226: ...tual Value current isotropic number S SS Total Min Selects the display of Total Min which is the minimum value for the entire measurement period Measurement Time Number of Measurements S SS Total Max...

Страница 227: ...rs are Actual Total Min Total Max Avg Meas the default and Total Avg Total Min Total Max and Total Avg are the min max and average values computed from all measurements completed thus far within the m...

Страница 228: ...iers in the BW setup are at the same power level the Field Strength value for other BW setups can be extrapolated based on the Channel Power in 1 4 MHz BW The Field Strength cell labels in the table a...

Страница 229: ...exceeds the set limit the Current and the Final Test Status are marked as Fail in red If the Field Strength Avg does not exceed the limit the Current Test Status is marked as Pass in green In the exam...

Страница 230: ...axis will be excluded from the measurement results and the instrument moves to the next axis Refer to Measurement Results W CDMA on page 8 14 Number of Measurements Sets the number of EMF measurements...

Страница 231: ...eriod is done in Volt units if any of the other units are selected the measurements are performed in power Watt units If you change the EMF units at the end of the measurement the values displayed are...

Страница 232: ...the scrambling code and related parameters On Off Switches On Off the manual codes Display Params Opens the Display Menu on page 8 13 Enter this submenu to select the parameter you want displayed in...

Страница 233: ...be viewed in the desired units and with the desired extrapolation factor Total Min is the minimum value computed from all measurements completed thus far within the measurement period Measurement Tim...

Страница 234: ...of Measurements Avg Meas is the running average of the isotropic results computed from all measurements completed thus far within the specified Measurement Time Using the Display Params submenu you ca...

Страница 235: ...asurement Time If the Field Strength Avg Meas exceeds the set limit the Current and Final Test Status are marked as Fail in red If the Field Strength Avg Meas does not exceed the limit the Current Tes...

Страница 236: ...8 4 W CDMA EMF Menu EMF Option 444 8 16 PN 10580 00234 Rev Y 3GPP MG...

Страница 237: ...er range Adjust range or decrease input power 3 Level Under a If Auto Range is On No signal detected Increase input power b If Auto Range is Off Adjust range or increase input power 4 Out of band satu...

Страница 238: ...cell ID is entered after setting Sync Type to RS this message is displayed All Measurement results are cleared A 4 TD LTE Messages 1 Sync signal not found When the firmware does not find a synchroniz...

Страница 239: ...ode scan 4 10 codogram 3 3 3 18 3 37 constellation 3 4 5 36 6 10 6 40 contacting Anritsu 1 4 control channel power 5 10 5 37 6 11 6 41 coverage mapping 7 1 7 11 D demodulator GSM GPRS EDGE 2 5 2 15 TD...

Страница 240: ...41 pass fail test menu LTE 5 44 TD LTE 6 48 Peak CD Error 3 4 peak phase error 2 8 peak to average power 3 4 PHICH 5 10 6 11 Physical Broadcast Channel power 5 10 6 11 Physical Control Format Indicato...

Страница 241: ...n 4 10 TD LTE menu map 6 26 signal analyzer 6 1 TD SCDMA HSPA menu map 4 13 signal analyzer 4 1 threshold 3 3 Time Alignment Error 5 18 5 42 6 19 6 46 timing error 6 3 total frame power 6 2 transmit o...

Страница 242: ...Index 4 PN 10580 00234 Rev Y 3GPP MG...

Страница 243: ......

Страница 244: ...Anritsu Company 490 Jarvis Drive Morgan Hill CA 95037 2809 USA http www anritsu com Anritsu utilizes recycled paper and environmentally conscious inks and toner...

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