User's Manual

Canopy 900 MHz AP and SM User Guide
Issue 2 August, 2004 Page 8 of 16
2 Feature Description and Operation
Each of the following sections describes features that are new or different or important with the
introduction of Canopy 900 MHz APs and SMs.
2.1 3.3 Mbps Signaling Rate
Description
Canopy 900 MHz AP and SM modules operate at 3.3 Mbps (compared to 10 Mbps for other Canopy
frequency bands). With Downlink Data set to 75% on the AP Configuration page, the AP supports high
throughput to an SM. As in other Canopy frequency bands, an AP has more bandwidth than an individual
SM.
Operation
Uplink and Downlink rates can be checked using the Link Test page on the AP. On an AP, select Expanded
Stats, then Link Test.
2.2 Network Features Identical to 5.2 GHz, 5.7 GHz, and 2.4 GHz
Description
Canopy 900 MHz modules run the same software and provide the same network features as all other
Canopy APs and SMs. NAT, color codes, SNMP, authentication, RSSI measurements, jitter measurements,
AP connections to a CMM2 or CMMmicro, AES option, and so on all work the same as before.
Operation
Same operation as other frequency bands.
2.3 Available as AP and SM – no Backhaul
Description
AP and SM modules are available for building 900 MHz Point to Multi-point networks. Backhauls are not
provided, as the narrower bandwidth available in the allocated 900 MHz frequency band does not lend
itself to the capacity usually desired for backhauls.
2.4 Three non-overlapping channels
Description
The Canopy 900 MHz modules provide 3 non-overlapping channels within the allocated 900 MHz
spectrum. Channels are 8 MHz wide, and can be set with RF Frequency Carrier (center of the channel) at
906, 907, 911, 915, 919, 923, or 924 MHz. For normal operation, it is recommended that the operator use
• 906 MHz for north and south facing APs
• 915 MHz for northeast and southwest facing APs
• 924 MHz for southeast and northwest facing APs
Note, this takes advantage of the spectrum available to provide 9 MHz between channel centers, 1 MHz
greater than the minimum 8 MHz channel size, for additional channel separation.
Operation
On the AP Configuration page, set the RF Frequency Carrier parameter to the desired frequency as shown
in Figure 1: Highlights of 900 MHz AP Configuration Page.
On the SM Configuration page, select/check the desired frequencies in the Custom RF Frequency Scan
Selection List.