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Viavi T-BERD 5800 Manual
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Viavi T-BERD 5800 Manual

Cpri testing with alu bbu emulation
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Viavi T-BERD 5800
CPRI Testing Guide with ALU BBU
Emulation
Version 4
January 2018
!
Firmware 26.0.0.6c1973b or Later REQUIRED
Scope
This document describes Common Public Radio Interface (CPRI) testing procedures. This document
is intended to be a method of procedure (MOP) for configuring CPRI test setups, running tests,
analyzing results, and creating reports with the Viavi T-BERD 5800v2. This document is not intended
to be a user guide. This MOP should be used in conjunction with T-BERD User's Guides for detailed
explanation of all testing options.
This document describes three test applications for the CPRI Check test: Verifying provisioning and
operation of CPRI Radio Equipment such as a Remote Radio Unit (RRU) unit
Technical Support
tac@viavisolutions.com
1-844-468-4284

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Summary of Contents for Viavi T-BERD 5800

  • Page 1 (MOP) for configuring CPRI test setups, running tests, analyzing results, and creating reports with the Viavi T-BERD 5800v2. This document is not intended to be a user guide. This MOP should be used in conjunction with T-BERD User’s Guides for detailed explanation of all testing options.

  • Page 2: Test Setup

    Thresholds can be set not just for total loss (dB) but for each contributing element. Follow this procedure to set up a T-BERD 5800 to run the Optical Time Domain Reflectometer (OTDR). The picture below is of a TBERD 5800v2 with a Single Mode OTDR module attached. The post of the OTDR module is covered with a green dust protector indicating that an Angled Physical Contact (APC) connector is used on the port.
  • Page 3 From the Home Screen , select FTTA OTDR (turns Yellow) Select the test tab and then the Setup button , then Load Config in the lower right corner. Select FTTA_RRU_ConstrLoop.SM-OTDR and Load as FTTA Config 3. Clean & Inspect (IBYC) Ensure all test jumpers, the hybrid cable and the OTDR port are clean using a Fiber Inspection probe and cleaning supplies.
  • Page 4 The schematic on the left shows the path up and down the tower independently, but the up/down paths are really the 2 fibers in a fiber pair with the connectors aligned side by side. 6. Run the Test Touch the Start/Stop green button The OTDR will take about 45 seconds to run a test at 1310 nm and another at 1550 nm.
  • Page 5 The screen shot below is the same test result, but presented in a graphical form instead of the traditional “trace” view. Values in black are unjudged results Values in Green have been assessed against a threshold and they Pass Values in Red (none shown) have been assessed against a threshold and they failed.
  • Page 6 Insert an SFP or SFP+ that supports the Wavelength, CPRI rate and range of the line under test into the T-BERD 5800v2’s Port 1 SFP+ slot. Note: All SFPs do not support CPRI. Use a Viavi approved CPRI SFP (see Appendix A) or one approved by your CPRI network equipment manufacturer.
  • Page 7 5. Test Menu Press the button to access the BBU Test 6. Launch Test Select the CPRI Check ALU BBU Emulation test for the proper rate (usually 4915.2M) 7. Manual Launch If the above tests are not loaded on the 5800 follow the next steps to launch the CPRI Check for ALU BBU Emulation.
  • Page 8 4. Creating a New RRH Configuration Step Action Details 1. Select Tests Press the button to Start a new Configuration Select ALU for the “Far-end Device” (default) and check to test needed for BBU Emulation Press the button to advance to the Link page 2.

  • Page 9: Loading A Saved Configuration

    4. Antenna Test Select the Transmit Antenna to test 5. Waveform Set the Waveform to LTE-FDD TM3.1 (NOTE TM3.1 is required for FULL OCNS channels to test VSWR and PIM) 6. Return Press the button to proceed to the Save Profile screen 7.

  • Page 10: Running The Test

    In the Local SFP Verification screen, verify that the SFP meets the requirements of the line under test. If the SFP was purchased from or approved by Viavi, and supports the selected CPRI line rate, the following screen will be displayed: to proceed to step 5.
  • Page 11 3. Run Tests . The T-BERD will run all configured tests. The first 5 tests (SFP Check, Interface, Start-up Sequence, RTD) will run simultaneously for the time specified in the setup screen (usually 30 seconds). Once completed, the RRH Identification test will run. 4.View Details Press the button for RRH Identification to view the details...
  • Page 12 7. RET Press the button to enter the RET Test 8. RET Info Select the ALD (RET Controller) from the list and check the Alarm state 9. Return Press the button to return to the test screen 10. Continue Pres the button to continue to the next test.
  • Page 13 14. Enable Press the button to Set the RRH. Once completed the Carrier State will show ENABLE a. NOTE – If the data was entered incorrectly the Tx and Rx frequencies will how “0” and are invalid and the Carrier State will be DISABLED 15.
  • Page 14 19. Diversity Press the button to enter the Diversity Imbalance Test The Diversity Imbalabnce test requires the RRH to be configured with specific data to transmit at full power. Please refer to step 13 if the VSWR test was not run 20.
  • Page 15 25. PIM Press the button to RUN the PIM Test 26. Spectrum Optional - Press the button to view the PIM trace 27. Return Press the button to return to the PIM test screen 28. Return Press the button again to return to the test screen 29.

  • Page 16: Creating A Report

    3. Creating a Report Step Action Details 1. Report Press the button to Create a report 2. Information Enter the Job information 31. Format Press the button to proceed to the next screen 32. Save Name the File and press the button to Create a report 33.