Knowledge Base

Question What is the meaning of "PosiScan Key Match - True/False"?  Response PosiScan Key Match - true indicates that we think that the TDR data captured at the tap matches the TDR data captured at the ground block sufficiently to calculate the length of the drop. If that value is false, then things didn't match well enough to decide the…

Question How does the MAP mVOA attenuate an optical signal? Response The MAP mVOA attenuates an optical signal by using a motor to move an expanded beam neutral filter in the beam path.

Question What is the address for the North American TAC FTP site? Response For those people on the Viavi network it is ftp://temp:temp@ftp.usatac.acterna.comtemp@ftp.usatac.acterna.com.  For public access (not on the Viavi network) it is ftp://temp:temp@157.234.214.59.

Question How does ONT generate the OOFOTL alarm insertion for OTL3 and OTL4? Response ONT generates the OOFOTL alarm by manipulating the FAS bytes at the transition between the OA1 and OA2 bytes (i.e. bytes 3 and 4), and in a bursty fashion as follows. OA1 = not (0xF6) = 0x09 OA2 = not (0x28)  = 0xD7 OTL3: 5 frames with errored FAS…

Question What is the SCPI command to retrieve Ethernet Service Disruption Results? Response There are several SCPI commands related to Ethernet SD and they were added in 27.1 for the 5800-V2 and 100G models. :SENSE:SAVE:SD:SUMMARY saves a SD Summary to a file :SENSE:DATA? STRING:LOG:SD:SUMMARY Get the latest SD Summary entry :SENSE:DATA?…

Question How I change the location A and B information on multiple files in Fiber Cable 2 Response Have the trace files pulled up, but none selected. At the top of the screen select "modify link information". You can the go in and change all the information on the A & B  locations. Once finished click NEXT, then "select traces", highligh…

Question What is the difference between an MTS/TBERD 5882 and the other V2 5800 models? Response The 5882 model adds an internal satellite receiver to provide synchronization for support of advanced timing applications such as PTP and One Way Delay. It also supports more advanced cable diagnostics using the Ethernet Pairing Partner (EPP)…

Question What is the purpose of the Test Protection setting on the MTS/TBERD 5800? Response Test Protection prevents a remotely initiated test in progress from being interrupted or having its results impacted by another remote unit or port. This applies specifically to Ethernet testing where test protection is a setting that can be…

Question What is the difference in the refresh rates, for RF-CPRI on the MTS 5800 V2, between the normal rate and the High Refresh rate? Response Normal refresh rate for the RFoCPRI is 10 times per second for 1 spectrum and 5 times per second for 2 spectrum. The High Refresh Rate application is 20 times per second per spectrum (up to 4).…

Question When would you want to use the RS-FEC Bypass that is available in applications such 25GE and CPRI Option 10 (24.3G)? Response Applications designed specifically for RS-FEC usually use or may require RS-FEC by specification in order to be standard compliant or achieve the desired range. Normally RS-FEC is applied automatically for…