The adaptive clocking configuration allows you to modify attributes that affect the adaptive clocking algorithm. The default settings are acceptable for most applications. We recommend that you change these settings only with the assistance of JTAC.
Before you begin:
To configure adaptive clocking for CTP bundles using CTPView:
Table 1: CTP Bundle Adaptive Clocking Settings in CTPView
Field | Function | Your Action |
---|---|---|
Initialize Adaptive Settings | Sets the adaptive clocking configuration to the default settings. | Place a check mark in the Yes check box. |
Aggressive Calc Period | Specifies the time period during initial start of adaptive clocking during which packet samples that are experiencing the least delay through the network are collected. These samples are used for aggressive state calculations. | Enter a number from 3 through 200 seconds. |
Maintenance Calc Period | Specifies the time period during normal adaptive clocking during which packet samples that are experiencing the least delay through the network are collected. These samples are used for maintenance state calculations. | Enter a number from 3 through 300 seconds. |
Slope for Maintenance | Specifies the number of packets per minute, which, when reached, causes the adaptive clocking algorithm to change from aggressive state to maintenance state. Lower values result in longer switchover times with a clock value closer to the remote clock. | Enter a number from 1 through 100 packets per minute. |
Maintenance Decay | Specifies how quickly the clocking corrects to the buffer set point while in maintenance state. | Enter a number from 2 though 120 seconds. |
Max Clock Adjustment Value | Specifies a cap for frequency acceleration, which constrains the frequency adjustments to the adaptive clock. | Enter a number from 1 through 200 parts per billion. |
Max Clock Offset | Specifies a cap for frequency velocity, which constrains the frequency velocity of the adaptive clock. | Enter a number from 1 through 400 packets per minute. |
Max Buffer Error | Specifies the buffer error rate required to change the adaptive clocking algorithm state from maintenance to aggressive. | Enter a number from 100 through 1,000,000 microseconds. |