PMP 400/430 and PTP 200/230 Series Configuration and User Guide
pmp-0042 (March 2014)
Page 55 of 98
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
Figure 27
is 75%.
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
Figure 27
is 2 miles. Set the
Range
to the
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
Table 17
.
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.