PMP 450 Planning Guide
Attribute
Meaning
Transmitter Output Power
This value represents the combined power of the AP’s two transmitters.
Nations and regions may regulate transmitter output power. For example
•
5.4/5.8-GHz modules are available as connectorized radios, which require the
operator to adjust power to ensure regulatory compliance.
The professional installer of the equipment has the responsibility to
•
maintain awareness of applicable regulations.
•
calculate the permissible transmitter output power for the module.
•
confirm that the initial power setting is compliant with national or regional
regulations.
•
confirm that the power setting is compliant following any reset of the module
to factory defaults.
External Gain
This value represents the amount of gain introduced by an external antenna.
Module Type
Recommended
Setting
OFDM connectorized with antenna
that was purchased with it
17
Receive Quality Debug
To aid in link performance monitoring, the AP and SM now report the number of
fragments received per modulation (i.e. QPSK, 16-QAM, 64-QAM) and per
channel (polarization).
Due to CPU load, this will slightly degrade packet per second processing.
Broadcast Repeat Count
The default is 2 repeats (in addition to the original broadcast packet, for a total of
3 packets sent for every one needed), and is settable to 1 or 0 repeats (2 or 1
packets for every broadcast).
ARQ (Automatic Repeat reQuest) is not present in downlink broadcast packets,
since it would cause unnecessary uplink traffic from every SM for each broadcast
packet. For successful transport without ARQ, the AP repeats downlink broadcast
packets. The SMs filter out all repeated broadcast packets and, thus, do not
transport further.
The default of 2 repeats is optimum for typical uses of the network as an internet
access system. In applications with heavy download broadcast such as video
distribution, overall throughput is significantly improved by setting the repeat
count to 1 or 0. This avoids flooding the downlink with repeat broadcast packets.
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pmp-0047 (March 2014)
Summary of Contents for PMP 450
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