Parameter

Description

External 1 PPS Clock
(Current and Configured)

The 1PPS (Pulse Per Second) clock is used to determine the air-frame start time. Assuming that all systems use the same air-frame size and DL/UL Ratio, then, when the 1PPS clock is received from a GPS system, this mechanism ensures inter-site and intra-site synchronization among all sectors, preventing cross interference and saturation problems. When using the internal 1PPS clock (derived from the selected 16 MHz clock source), only intra-site synchronization among sectors can be achieved.

In a slave unit the External 1 PPS Clock is set to Enable and cannot be disabled (the clock is received from the previous unit in the chain).

In a master unit the available options are Enable (use external 1PPS clock source) and Disable (use internal 1PPS clock source derived from the selected 16 MHz clock).

External 16 MHz Clock
(Current and Configured)

The 16 MHz clock source is used for generation of all main clocking signals in the system, including the internal 1PPS clock. Using an external, accurate 16 MHz clock source will enable better hold-over of the 1PPS clock upon temporary loss (or reduced reliability when receiving less than 4 satellites) of the external 1PPS clock. This will allow a longer time of continued operation before appearance of interferences due to clock drifts among Base Stations.

In a slave unit the External 1 PPS Clock is set to Enable and cannot be disabled (the clock is received from the previous unit in the chain).

In a master unit the available options are Enable (use external 16 MHz clock source) and Disable (use internal 16 MHz clock source). In the current release, external 16 MHz clock from the GPS Adapter is not available. The External 16 MHz Clock must be disabled (the default).

Clock Mode (Micro Base Station only)

In the current release the Clock Mode parameter is not applicable for a modular Base Station,

The Clock Mode parameter defines the location of the unit in the chain. The available options are:

• Master

• Redundant (not supported in current release)

• Slave 1 (the first Slave unit in the chain, connected to the Master unit)

• Slave 2 (the second Slave unit in the chain)

• Slave 3 (the third Slave unit in the chain)

• Slave 4 (the fourth Slave unit in the chain)