DragonWave Horizon COMPACT - Adaptive Transmit Power Control (Atpc); C Ontrol (Atpc)

Advanced Configuration Features
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Horizon Compact Release 1.01.00 Wireless Ethernet Product User Manual – Volume 2
3.6 Adaptive Transmit Power Control (ATPC)
Adaptive Transmit Power Control (ATPC) allows a Horizon Compact system to adjust its transmit power
to compensate for far end signal loss caused by changes in atmospheric conditions e.g. heavy rain.
ATPC maintains the RSL at -50 dB and adjusts the transmit power as necessary in order to maintain -50
dB during fade conditions.
RSL threshold levels that trigger power changes, the maximum power change allowed, and a hysteresis
factor are preset at values which optimize the operation of the Horizon Compact system. A fade factor of
5dB/second can be handled.
The Horizon Compact system is able to discriminate between RSL levels that are reduced as a result of
interference and those as a result of genuine path loss, so that ATPC is not invoked unnecessarily.
Some jurisdictions require the use of ATPC so that power levels are kept as low as possible when
wireless communication conditions are good. When ATPC is to be used, if it can be shown that the
maximum power of the system would be used only on infrequent occasions, some jurisdictions will allow a
lower power level to be used in the calculations that determine interference criteria. This offers some
advantage to the installation. This lower power is termed the “coordinated power”. The DragonWave
ATPC feature supports a coordinated power parameter.
Note: If ATPC and Automatic Adaptive Modulation (AAM) are both enabled, when AAM is invoked i.e.
modulation scheme switched to a lower level, ATPC is automatically disabled until AAM restores the
original modulation scheme.
Procedure 3-9
Configure Horizon Compact Adaptive Transmit Power Control
Required Action Steps
login Log in as a NOC user.
get atpc status
Returns the current status of the atpc
Sequence:
get atpc status press Enter
System responds:
Atpc is on/off
set atpc
Enables or disables atpc.
Sequence:
set atpc [on/off][coordinated power] press Enter
System responds:
Atpc is [on/off][coordinated power setting]