Frequency synchronization is critical for all mobile technologies. SDH synchronization to NodeB or eNodeB devices must meet tight ITU-T metrics. This test plan provides field test procedures to ensure high quality synchronization for mobile backhaul networks which are synchronized by SDH/PDH.
More than 200,000 NTP base stations have been deployed globally for 3G networks. With increasing traffic levels, more and more intermittent issues such as dropped calls, handover failures and slow data transfers are showing up.
One in a series of three Field Test Plans using Calnex Sentinel. Frequency synchronization is critical for all mobile technologies. PTP synchronization to NodeB/eNodeB devices must meet tight ITU-T standard specifications as well as vendor specific limits.
With the limited availability of frequency spectrum, TDD-LTE networks are now being deployed to meet the demand for bandwidth. This adds a new requirement to provide highly accurate phase synchronization to the base stations.
Measuring the time error of an LTE basestation with no 1pps output is a challenging problem. One option is to make a measurement of the downlink radio signal. This primer describes how to make such an over-the-air “time error” measurement.
Sentinel’s Rubidium offers best-in-class holdover performance enabling accurate sync test when there is no GPS signal available. This FAQ explains the features of the Rubidium and how to discipline it to ensure accurate
timing while in holdover.
This setup guide shows you how to configure the Calnex Sentinel to measure the 1pps Time Error from, for example, a PTP (1588) Master Clock, Boundary Clock or a Slave Clock. The possibility for in-depth analysis is also explored.
While frequency measurements using the Calnex Sentinel can be performed with a fairly straight forward test setup, time error measurements require consideration of the effects of delays introduced by differing cable lengths.
This setup guide shows you how to configure the Calnex Sentinel to measure wander in a Synchronous Ethernet (SyncE) network.The measurement results can be loaded to the Calnex Analysis Tool for more in-depth analysis and to generate a report.
This setup guide shows you how to configure the Calnex Sentinel to measure PTP 2 Way Time Error in monitor mode using an external Ethernet TAP or optical splitter. The measurement results can be loaded in to the CAT for more in-depth analysis.