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Acterna CDMA 800/1900 MHz BS Test Operating Instructions Manual

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CDMA 800/1900 MHz
BS Test
Software Option 897 804
Operating Instructions
(61_CDMA) Doc. Version: 9811-210-A
10
Acterna Muenchen GmbH, Gutenbergstr. 2 – 4, D-85737 Ismaning
¤
+49 (89) 9 96 41-0
Fax: +49 (89) 9 96 41-160

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  • Page 1 CDMA 800/1900 MHz BS Test Software Option 897 804 Operating Instructions (61_CDMA) Doc. Version: 9811-210-A Acterna Muenchen GmbH, Gutenbergstr. 2 – 4, D-85737 Ismaning ¤ +49 (89) 9 96 41-0 Fax: +49 (89) 9 96 41-160...

  • Page 3: Table Of Contents

    CDMA BS Test Contents Introduction ....................10-5 Equipment supplied ..................10-5 Equipment recommended ................10-5 Short notation rules..................10-6 Screen messages in running text ............10-6 Prompt to operate key................10-6 Hardware requirements ................10-7 Loading and Starting CDMA System Program .......
  • Page 4 CDMA BS Test 10-4...

  • Page 5: Introduction

    Introduction CDMA BS Test Introduction The CDMA BS Test option enables the user to test the performance of CDMA base stations to the IS-95 and related specifications standard defined by the United States Telecommunications Industry Association. In addition to tests defined in the standard, other measurements can be performed that are useful when troubleshooting a base station.

  • Page 6: Short Notation Rules

    CDMA BS Test Introduction Short notation rules Screen messages in running text Notation for texts when they are to be read off the screen. Offset Following the text IEEE-488 ADR.: IEEE-488 ADR.: is a screen message that there is a number ... on the screen you will look at later when calling up the so- shown in inverted form.

  • Page 7: Hardware Requirements

    Introduction CDMA BS Test Hardware requirements In order to test CDMA BTS equipment, the following hardware components are required: CDMA option fitted in the STABILOCK 4032 (253 003) FEX frequency-range extension (248 295) Necessary for Analyzer Tracking: Analyzer hardware option fitted in the STABILOCK 4032 (236 062).

  • Page 8: Loading And Starting Cdma System Program

    CDMA BS Test Loading and Starting CDMA System Program Loading and Starting CDMA System Program The CDMA BS Test system program is contained on a 64 kByte SYSTEM CARD. You have to load the CDMA system program into the RAM of the Communication Test Set if it is the first time that you use the CDMA program or after a total reset of the STABILOCK, or if you use another system program before CDMA.

  • Page 9: General Test Parameters

    General Test Parameters CDMA BS Test General Test Parameters Overview Summary mask {SETUP} Setup mask (general setup) {Channel} Limits mask Channel Setup mask {Limits} (limit settings) (channel setups) {RF-DIR} Selection of high- sensitive RF-DIR socket Available Setup masks Fig. 10.5: Fig.

  • Page 10: Display Parameters And Test Parameters

    CDMA BS Test General Test Parameters Display parameters and test parameters All settings of display parameters and test parameters are made either in the Setup mask (called up from Summary mask by ) or in additional masks {Setup} accessed from the mask. The standard settings of all entry fields of the mask can be retrieved by {Default} Averages...

  • Page 11: Changing Units Of Test Results

    General Test Parameters CDMA BS Test Changing units of test results Setting in Setup mask Unit of transmitted power on channel, Channel Power Units can be set as dBm or W (including mW). Unit of power of pilot signal. Power of Pilot Power Units pilot signal is indicated in relation to total power.
  • Page 12 CDMA BS Test General Test Parameters Channel/frequency assignment Channel/frequency assignment can be set up in the Channel Setup mask. Default channel and frequency assignments for IS-95 and J-STD-008 (labeled PDC 1900) are available, but user-defined channel settings are also possible. CDMA BS Channel Setup mask Pre-defined channel settings 1.) From the CDMA Summary mask, call up the Channel Setup mask by...

  • Page 13: Setting Pass/Fail Limits

    General Test Parameters CDMA BS Test Setting pass/fail limits When results are displayed in the measurement masks, those that fall outside pass/fail limits defined in the Limits mask are shown in reverse video. Test limits can be specified such that reported results are either checked against maximum only, minimum only, maximum and minimum, or no check is performed.

  • Page 14: Perform Cdma Tests

    CDMA BS Test Perform CDMA Tests Perform CDMA Tests Pre-settings 1. After entering the general test parameters, call the CDMA Summary mask. 2. Enter the frequency channel number to be measured in the CDMA Chan field. 3. Enter the code channel to be measured in the Code Chan field. All code domain measurements are performed on this channel.

  • Page 15: Pn Offset Search Function

    Perform CDMA Tests CDMA BS Test PN offset search function The PN offset search function allows to quickly find the PN offset of the sector connected to. The STABILOCK automatically searches for the correct timing offset of the short PN code. This code is used by the CDMA network to distinguish sectors from one another.

  • Page 16: Tx Test

    CDMA BS Test Perform CDMA Tests TX test Overview Summary mask (TX test mode) {CONST} {SPECTRUM} {MIN-MAX} Min-Max Spectrum analyzer Constellation mask mask {CODE} {TIME} Time Domain Code Domain masks mask power, phase and time For TX tests, both the RF and the RF-DIR socket are available. You select the desired one in the Setup mask.
  • Page 17 Perform CDMA Tests CDMA BS Test Fig. 10.11: Fig. 10.12: Fig. 10.13: Min-Max mask: this shows Time Domain mask: the Constellation mask: the current measured figure, power in the CDMA channel called up by {TX-TEST} the minimum, maximum and is displayed on the time axis. from the Summary {CONST} a v e r a g e...

  • Page 18: Tx Test Results

    CDMA BS Test Perform CDMA Tests TX test results After only the softkeys alter, the STABILOCK switches to the TX test {TX-TEST} mode. The Summary mask shows all measured values of the TX test. Fig. 10.18: An active channel has been found and is used for measurements.
  • Page 19 Perform CDMA Tests CDMA BS Test Reference field Indicates the reference frequency for all measure- ments. Indication Meaning INTERNAL The Communication Test set is using either its internal 10 MHz reference, or a 10 MHz reference injected at the standard reference port.
  • Page 20 CDMA BS Test Perform CDMA Tests Measurement in CDMA channel Average of power in the CDMA channel. Power Frequency error. The difference between the Freq. Error measured and the specified carrier frequency. Measurement in pilot channel Modulation quality as specified in IS-97 (10.3.2). Quality (ρ) The quality is the normalized correlated difference between the measured and the ideal signal.
  • Page 21 Perform CDMA Tests CDMA BS Test The following softkeys can be used to activate specific transmitter test modes: Fig. 10.19: Summary mask after selecting {TX-TEST} Calls up Constellation mask. {CONST} Calls up Code Domain mask. {CODE} Calls up Time Domain mask. {TIME} Calls up Min-Max mask.
  • Page 22 CDMA BS Test Perform CDMA Tests Constellation mask Call up with {CONST} The Constellation mask shows the I/Q diagram for the demodulated BTS signal. This diagram can be used to qualitatively assess impairments in the BTS transmitter, such as excessive phase noise, frequency offset, or amplitude distortion.
  • Page 23 Perform CDMA Tests CDMA BS Test The points of maximum effect (POME) are joined together. {Lines} Phase errors are easy to recognize in this kind of display. Fig. 10.21: Constellation mask with an I/Q diagram indicating a phase error. As in , however the points are not erased after a {Accum} {Dots}...
  • Page 24 CDMA BS Test Perform CDMA Tests Code Domain masks The Code Domain masks show the measured result (phase or time or power) in the 64 code channels of the current CDMA channel. The Code Domain Power mask shows the correlated power for all code chan- nels.
  • Page 25 Perform CDMA Tests CDMA BS Test Entry fields In the Code Domain Power mask it is possible to change the CDMA channel, the code channel and the PN offset (see Summary mask for details of fields). The selected code is highlighted in the graphical display. The entry field Code Chan can be changed via handwheel if the field is displayed in inverse video, even if was pressed.
  • Page 26 CDMA BS Test Perform CDMA Tests Code Domain Time mask Shows the relative time offset of each active code channel. permitted values are from 1 to 999 ns Fig. 10.24: Indication of time offset in active code channels. Changes to the Code Domain Power mask. {Power} Changes to the Code Domain Phase mask.
  • Page 27 Perform CDMA Tests CDMA BS Test Code Domain Phase mask Shows the relative phase error of each active code channel. Fig. 10.25: Indication of phase error in active code chan- nels. Changes to the Code Domain Power mask. {Power} Changes to the Code Domain Time mask. {Time} Stops the ongoing measurement and freezes its display.
  • Page 28 CDMA BS Test Perform CDMA Tests Time Domain mask The Time Domain mask shows the total channel power versus time template of the CDMA channel. Fig. 10.26: Time Domain mask with horizontal time axis and vertical power axis. Decreases the update interval of the display. It does not effect the {Faster} measurement accuracy.
  • Page 29 Perform CDMA Tests CDMA BS Test Min-Max mask The Min-Max mask shows the current measurements, the minimum measured figure, the maximum measured figure and the average of all measurements performed in the ongoing interval. Current measured figure Type of measurement Maximum Fig.
  • Page 30 CDMA BS Test Perform CDMA Tests Spectrum analyzer mask The displayed SPECTRUM ANALYZER mask is based on the spectrum analyzer hardware option (ordering code: 248 291). For details of this mask, refer to the operating instructions for the spectrum analyzer. When activated from the Summary mask (in TX test mode), the Spectrum analyzer mask will take over the center frequency of the CDMA channel, selected in the Summary mask.

  • Page 31: Rx Test

    Perform CDMA Tests CDMA BS Test RX test Overview Summary mask {RX-Test} RX TEST mask RX masks Fig. 10.30: RX TEST mask. Start RX test The RX TEST mask allows the user to generate a reverse channel signal with the Communication Test Set.
  • Page 32 CDMA BS Test Perform CDMA Tests Set the CDMA channel. CDMA Chan The user may enter a value between 0 and 63. Can be used PN Chip to introduce time offset (delay) into reverse signal. Each unit (chip) will introduce a 813 ns delay in the transmitted signal.
  • Page 33 Perform CDMA Tests CDMA BS Test This page is intentionally left free. 10-33...

  • Page 34: Querying Results With Ieee Controller

    CDMA BS Test Querying Results with IEEE Controller Querying Results with IEEE Controller The Communication Test Set can be controlled by an external IEEE controller. Precise details of how IEEE commands are used can be found in Chapter 8 of the STABILOCK manual, section "IEEE Commands".
  • Page 35 CDMA BS Test-specific IEEE Commands CDMA BS Test SPECIal02 Status query, the Communication Test Set reports the status of the CDMA BS Test option to the controller. Output format: aaaa, bb, cc, dd aaaa = CDMA BS Test status (16 bits) Value Bit number Synchronization ok...
  • Page 36 CDMA BS Test CDMA BS Test-specific IEEE Commands SPECIal03,aaaa,bbbb,cccc,ddd Sets the values of fields Result, averaging and Timing measurements of the CDMA SETTINGS mask. Measurement has to be restarted for changes to take effect. aaaa Averaging in the Summary mask is performed over the number of frames set in aaaa (Result averaging field).
  • Page 37 CDMA BS Test-specific IEEE Commands CDMA BS Test Query with RESULt command Command String Meaning 12345678901234567890 Summary mask RESULt1 a = Channel power aaaaaabbbcccccdddddd b = Channel power unit of measure c = Frequency error (Hz) d = Pilot time offset (µs) RESULt2 a = Waveform quality aaaaaabbbbbbccdddddd...
  • Page 38 CDMA BS Test CDMA BS Test-specific IEEE Commands Command String Meaning 12345678901234567890 Min-Max mask RESULt1 Frequency error (Hz): aaaaabbbbbcccccddddd a = current b = minimum c = maximum d = average RESULt2 Pilot time offset (µs): aaaaaabbbbbbccccccdd a = current b = minimum c = maximum d = average (first two digits)
  • Page 39 CDMA BS Test-specific IEEE Commands CDMA BS Test Command String Meaning 12345678901234567890 RESULt9 Waveform quality: aaaaaabbbbbbcccccc** a = maximum b = average Pilot power (dB, % or linear): c = current * = not used RESULtA Pilot power: aaaaaabbbbbbcccccc** a = minimum b = maximum c = average * = not used...
  • Page 40 CDMA BS Test CDMA BS Test-specific IEEE Commands Command String Meaning 12345678901234567890 Time Domain mask RESULt1 a = Average channel power aaaaaabbbccccccddd** b = Average channel power unit of measure c = Maximum channel power d = Maximum channel power unit of measure * = not used RESULt2...
  • Page 41 CDMA BS Test-specific IEEE Commands CDMA BS Test Command String Meaning 12345678901234567890 Constellation mask RESULt1 a = Carrier feedthru aaaaaa************** * = not used RESULt2 a = RMS EVM aaaaabbbbbcccccddd** b = RMS magnitude error c = RMS phase error d = RMS phase error unit of measure * = not used RESULt3...

  • Page 42: Appendix

    CDMA BS Test Appendix Appendix Performing selftest The CDMA system program has its own selftest. All modules on the CDMA option are checked for proper functioning. The software and hardware versions of the individual modules are also read and displayed. While in the CDMA summary mask, call up the SELFTEST mask by pressing {Setup} {Self_Test}...

  • Page 43: Cdma Module I/O Connectors

    Appendix CDMA BS Test CDMA module I/O connectors IF (Intermediate Frequency) signal input. This input connector is con- nected to the IF output of the HF slave by an external coaxial cable (K113, 382 171, supplied with CDMA option). AF Bu Input for an even second reference clock pulse from the CDMA base station.

  • Page 44: Cabling

    CDMA BS Test Appendix Cabling Connect the CDMA BTS under test to the Communication Test Set as follows: Fig. 10-33: In-service testing. An external 10 MHz signal is provided by the BS and directly injected into the 10 MHz reference input on the Communication Test Set. 10-44...
  • Page 45 Appendix CDMA BS Test Fig. 10.34: Out-of-service testing using HPA antenna output. An external 10 MHz signal is provided by the BS and directly injected into the 10 MHz reference input on the Communi- cation Test Set. 10-45...
  • Page 46 CDMA BS Test Appendix Fig. 10-35: In-service testing. An external 19.6608 MHz signal is provided by the BS and directly injected into the Communication Test Set. The CDMA module regenerates a 10 MHz reference used as the system reference for the Communication Test Set. 10-46...
  • Page 47 Appendix CDMA BS Test Fig. 10-36: Out-of-service testing using HPA antenna output. An external 19.6608 MHz signal is provided by the BS and directly injected into the Communication Test Set. The CDMA module regenerates a 10 MHz reference used as the system reference for the Communication Test Set.

  • Page 48: Glossary

    CDMA BS Test Appendix Glossary These are some of the acronyms used in CDMA. Base station CDMA Code division multiple access Chip Time interval defined as 1/1.2288 MHz = 0.814 µs Error vector magnitude Frame error rate Mobile station Pseudo random POME Point of maximum effect Root mean square...
  • Page 49 Appendix CDMA BS Test Lifeline The chronological lifeline tells the user what modifications have been made to the software (SW) and the operating instructions. After a software update the lifeline helps the user to find out quickly about all major changes (see code) in the updated operating instructions that are supplied.
  • Page 50 CDMA BS Test Appendix 10-50...

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