Downlink Data %, Range, And Control Slots; Figure 27: Max Range & Downlink Data On Ap "Configuration => Radio" Page - Cambium Networks PMP 400 Series Configuration And User's Manual

PMP 400/430 and PTP 200/230 Series Configuration and User Guide

Downlink Data %, Range, and Control Slots

The Downlink Data parameter on the AP's and BHM's Configuration => General page can be set in 1%
increments between 10% and 90%. The default as shown in
In order for U.S. model 5.4 GHz PTP Series radios to meet FCC DFS compliance, the Downlink Data has
been limited to 10-65% at the Backhaul Master. For all other regions of 5.4 GHz PTP 230 Series radios and
all regions of 5.8 GHz PTP radios, the Downlink Data range remains 10-90%.
The Range parameter on the AP's Configuration => General page can be set in 1-mile increments
between 1 and 30 miles for PMP 430 5 and 10 MHz channel bandwidth and between 1 and 24 miles for
PMP 430 20 MHz channel bandwidth. The default as shown in
distance of the furthest SM from any AP in the area. The Range parameter effectively determines frame
structure of the Canopy over-the-air protocol, especially turn-around guard time. Setting Range the same
across a geographical area give best overall performance.
Range does not change transmit power levels. Do not set a higher Range than needed. A higher Range
gives no higher power and slightly reduces throughput to allow for higher air delay and turn-around time.
If the Range is set to greater than 5 miles, the SM limits the Downlink Data to a maximum of 85% to avoid
close-in SMs having registration issues. For example, a Range of 6 miles and a Downlink Data of 90% is
not allowed. Operationally,

if the Downlink Data % is set to greater than 85% and the user enters a range greater than 5 miles,
the module will reset the Downlink Data % to 85%

if the range is set to greater than 5 miles and the user enters a Downlink Data % of greater than
85%, the module will reset the Downlink Data % to 85%.
Figure 27: Max Range & Downlink Data on AP "Configuration => Radio" page.
Suggested Control Slot settings as a function of number of SMs in the sector are shown in
Generally all APs in a cluster should use the same number of control slots so as to keep the frame
structures, and thereby the send and receive timing, the same.
pmp-0042 (March 2014)
Figure 27 is 75%.
Figure 27 is 2 miles. Set the Range to the
Table 17.
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