This topic describes how to configure port parameters for IRIG-B daughter cards.
Adaptive clocking is configured by default on IRIG-B bundles, and the packet size is set to 64 bytes. The packet size combined with the default data rate of 16 Kbps, produces a packet rate of 32 pps, which is a good packet rate for adaptive clocking.
Before you begin:
To configure IRIG-B port parameters using the CTP Menu:
If you select an active bundle, you are prompted to disable the bundle before configuring it.
The options vary depending on whether the bundle is T1 or E1 and whether fractional T1 or E1 is configured.
Table 1: CTP Bundle IRIG-B Port Parameter Settings in the CTP Menu
Field | Function | Your Action |
---|---|---|
Direction | Specifies the direction of the circuit. Although the IP circuit connection through the network is full duplex, an IRIG-B circuit is actually a simplex application, and the daughter card can operate only in Rx or Tx mode and not both at the same time. | Specify yes or no to the question: Is this an IRIG-B source end (IRIB-B signal enters CTP)?
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Output High Level | This setting appears only if you set the direction of the port to Tx. Specifies the high output level, which is measured in peak-to-peak voltage. This setting is based on a 50 ohm termination | Enter a number from 0.00 through 7.85 volts peak-to-peak. |
Output Low Volts Level | This setting appears only if you set the direction of the port to Tx. Specifies the low output level, which is measured in peak-to-peak voltage. This setting is based on a 50 ohm termination. | Enter a number from 0.00 through 7.85 volts peak-to-peak. |
Port Speed (kbps) | Specifies the data rate on the IP connection. Unless network bandwidth is at a premium, we do not recommend that you change this value from the default of 16 Kbps. | Enter a number from 1000 through 25,500 bps. The port speed must be a multiple of 100 bps. |
Clock Config | Specifies the type of clocking for the bundle. | Select one:
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