 Sync. Test Type Metrics Reference Wander Generation G.8261, G.8261.1, G.823, TIE, MRTIE, MTIE, TDEV quency G.824 Wander Tolerance G.8261, G.8261.1, G.812, TIE, MTIE, TDEV quency G.813, G.823, G.824 Peak-to-peak amplitude G.8261, G.8261.1, G.823, Jitter Output quency (UIpp) G.824 Jitter Tolerance G.8261, G.8261.1, G.812, quency G.813, G.823, G.824 Phase max|TE|, 2wayTE, cTE, dTE Phase Alignment G.8271.1, G.8271.2 (MTIE, TDEV) Phase Phase Tolerance max|TEL, MTIE, TDEV G.8271.1, G.8271.2 Accuracy, hold-in, Parts per million (ppm) G.8262, G.8262.1 SyncE quency pull-in, pull-out Wander Generation TIE, MTIE, TDEV G.8262, G.8262.1, G.81x SyncE quency Jitter Generation G.8262, G.8262.1 SyncE quency Noise Transfer dB phase gain, TIE, TDEV G.8262, G.8262.1 SyncE quency Transient Response TIE, MTIE G.8262, G.8262.1 SyncE quency Holdover TIE, ns/s, ns/s2 G.8262, G.8262.1 SyncE quency Phase Noise Generation 2wayTE, cTE, dTE, MTIE, G.8273.2 Phase Noise Generation TE, cTE, dTE, MTIE, TDEV G.8273.2 Phase Noise Transfer dB phase gain G.8273.2, G.8262, G.8262.1 Phase Holdover TE, dTE G.8273.2 Note that there are additional (stricter) requirements for better-quality frequency clocks, such as wander generation for SSU and PRC clocks, SO you need to consult the appropriate recommenda- tion from the G.81x range. In G.823, there are also different limits for jitter and wander (output and tolerance) depending on the clock type and whether they are network or synchronization interfaces. 12.3.1 Testing PRTC, PRC, and T-GM Clocks The testing of a PRTC and T-GM or a PRC/PRS frequency source is a somewhat different scenario, and testing this class of equipment is not that common. That is because it is specialized and requires measuring equipment not commonly found in most network labs. For reference, you can find more information on testing these clocks in Appendixes A.2 and B.2 of ITU-T G.8273. The problem is that the performance of a PRTC based upon a GNSS receiver reflects not just the characteristics of the device, but also the behavior