
Chapter 4: Feature Description
Innovative Techniques to Boost Capacity and Reduce
Latency
ATPC
ATPC is a closed-loop mechanism by which each carrier changes the transmitted signal power
according to the indication received across the link, in order to achieve a desired RSL on the other
side of the link.
ATPC enables the transmitter to operate at less than maximum power for most of the time. When
fading conditions occur, transmit power is increased as needed until the maximum is reached.
The ATPC mechanism has several potential advantages, including less transmitter power
consumption and longer amplifier component life, thereby reducing overall system cost.
ATPC is frequently used as a means to mitigate frequency interference issues with the
environment, thus allowing new radio links to be easily coordinated in frequency congested areas.
The Power Consumption Saving mode enables the system to adjust the power automatically to
reduce the power used, when possible.
ATPC Override Timer
Without ATPC, if loss of frame occurs the system automatically increases its transmit power to the
configured maximum. This can cause a higher level of interference with other systems until the
failure is corrected.
Note
ATPC Override Timer is planned for future release.
In order to minimize this interference, some regulators require a timer mechanism which will be
manually overridden when the failure is fixed. The underlying principle is that the system must
start a timer from the moment maximum power has been reached. If the timer expires, ATPC is
overridden and the system transmits at a pre-determined power level until the user manually re-
establishes ATPC and the system works normally again.
The user can configure the following parameters:
•
Override timeout (0 to disable the feature): The amount of time the timer counts from the
moment the system transmits at the maximum configured power.
•
Override transmission power: The power that will be transmitted if ATPC is overridden
because of timeout.
The user can also display the current countdown value.
When the system enters into the override state, ATPC is automatically disabled and the system
transmits at the pre-determined override power. An alarm is raised in this situation.
The only way to go back to normal operation is to manually cancel the override. When doing so,
users must be sure that the problem has been corrected; otherwise, ATPC may be overridden
again.
Page 4-14
Содержание PTP 820S
Страница 1: ...Cambium PTP 820S Technical Description System Release 7 9 ...
Страница 27: ...Chapter 2 PTP 820S Hardware Description PoE Injector Figure 7 PoE Injector Ports Page 2 8 ...
Страница 156: ...Chapter 6 Standards and Certifications This chapter includes Supported Ethernet Standards Page 6 1 ...
Страница 208: ...Term Definition XPIC Cross Polarization Interference Cancellation Page IV ...