PMP 400 and PTP 200 Series
Canopy User Guide Supplement
Issue 3, January 2009
Page 10 of 45
2.3
CONFIGURATION OPTIONS – RF, IP, DFS
These systems use the Canopy Media Access Controller (MAC) layer. Settings like Downlink
Data %, Range, and Control Slots are similar to Canopy FSK radios. An AP can communicate to
over 200 SMs, similar to a Canopy FSK AP.
The GUI (Graphical User Interface) is almost identical to Canopy’s, with a few additions to
support OFDM-specific features.
Network features like High Priority using DiffServ, MIR, CIR, NAT, DHCP and VLAN are available
for the PMP 400 and PTP 200 Series OFDM radios, and are configured in the same way as they
are for the PMP 100 and 200 Series and PTP 100 Series radios.
In the 5.4 GHz band, DFS (Dynamic Frequency Selection) is provided for regulatory compliant
operation, and is activated using the “Region Code” feature. Two alternate frequencies can be
configured to provide service in the unlikely case a module detects radar and triggers DFS, the
same as standard Canopy. “External Antenna Gain” may need to be configured consistent with
any antennas used, to avoid making the system overly sensitive to radar detection. “Whitening,” a
technique used to avoid self-interference on Canopy FSK radios is not offered as an option on the
PMP 400 and PTP 200 Series radios, as whitening is not a technology applicable to an OFDM
signal.
2.4
RELEASE MAPPING TO PRODUCTS
Releases run on the various products as follows:
•
Release 9.0 or Release 8.2.x runs on Canopy FSK radios (PMP 100 and 200 and
PTP 100 Series radios).
•
Release 8.4.x runs on PMP 54400 and PTP 54200 Series OFDM radios.
•
“Release 8.3” is not planned to be used for release numbering.
•
Release 9.3.1 runs on PMP 49400 Series OFDM radios
2.5
POWER AND GROUNDING
The PMP 400 and PTP 200 Series radios use a 30 VDC nominal power system, instead of the 24
VDC nominal power system used previously in standard Canopy. A new 30 VDC power supply is
available for the CMMmicro, and a new 30 VDC nominal (specified and labeled as 29.5 VDC)
power supply is available for the SM.
The new 30 VDC power supplies can also be used for standard Canopy, and are replacing the 24
VDC power supplies in the Canopy product line.
The PMP 400 and PTP 200 Series radios have slightly higher power use than Canopy FSK
radios, and the higher voltage is needed to carry the higher wattage on cable runs approaching
the 100 meter (328 ft) maximum length. CMMmicro 24 VDC power supplies and the latest version
of SM 24 VDC power supplies can power PMP 400 and PTP 200 Series radios for shorter runs.
Earlier versions of SM 24 VDC power supplies, especially the earlier heavier transformers,
cannot. The best practice is to use 30 VDC power supplies with PMP 400 and PTP 200 Series
radios, and avoid potential issues and cable-length-specific engineering.
Due to the full metallic connection to the tower or support structure through the AP’s antenna or a
connectorized BH’s antenna, grounding of the AP or BH and a 600SSC surge suppressor within 3
ft (1 m) of the AP or BH is strongly recommended to suppress overvoltages and overcurrents,
such as those caused by near-miss lightning. APs and BHs provide a grounding lug for grounding
to the tower or support structure. A pole mount kit is available for the 600SSC, and provides a
grounding lug that can be used for terminating grounding straps from both the 600SSC and the
AP.
