User Guide
Table Of Contents
- Cambium
- PMP 450 Planning Guide
- Accuracy
- Copyrights
- Restrictions
- License Agreements
- High Risk Materials
- Safety and regulatory information
- Contents
- List of Figures
- List of Tables
- About This Planning Guide
- PMP support website: http://www.cambiumnetworks.com/support
- Cambium main website: http://www.cambiumnetworks.com/
- Sales enquiries: solutions@cambiumnetworks.com
- Email support: support@cambiumnetworks.com
- Cambium Networks
- 3800 Golf Road, Suite 360
- Rolling Meadows, IL 60008
- Chapter 1: Product description
- Chapter 2: Planning considerations
- Regulatory planning
- Network migration planning
- Site planning
- Link planning
- Analyzing the RF Environment
- Selecting Sites for Network Elements
- Diagramming Network Layouts
- Grounding and lightning protection
- Configuration options for TDD synchronization
- Data network planning
- Security planning
- Isolating APs from the Internet
- Managing module access by passwords
- Filtering protocols and ports
- Port Lockdown
- Isolating SMs
- Filtering management through Ethernet
- Allowing management from only specified IP addresses
- Configuring management IP by DHCP
- Planning for airlink security
- Planning for RF Telnet Access Control
- Planning for RADIUS integration
- Planning for SNMP security
- Ordering components
- Chapter 3: Legal information
- Cambium Networks end user license agreement
- Acceptance of this agreement
- Definitions
- Grant of license
- Conditions of use
- Title and restrictions
- Confidentiality
- Right to use Cambium’s name
- Transfer
- Updates
- Maintenance
- Disclaimer
- Limitation of liability
- U.S. government
- Term of license
- Governing law
- Assignment
- Survival of provisions
- Entire agreement
- Third party software
- Hardware warranty
- Limit of liability
- Cambium Networks end user license agreement
- Chapter 4: Reference information
PMP 450 Planning Guide Wireless operation
pmp-0047 (December 2012)
1-15
Link operation – Dynamic Rate Adapt
PMP 450 Series products offer four levels or speeds of operation – 1x (QPSK), 2x (QPSK-MIMO-B), 4x (16QAM-
MIMO-B), and 6X (64QAM-MIMO-B). If received power is less due to distance between the AP and the SM or
due to obstructions, or if interference affects the RF environment, the system will automatically and dynamically
adjust links to the best operation level.
The system chooses its operation rate dynamically, based on an internal ARQ (Automatic Repeat reQuest) error
control method. With ARQ, every data slot of every frame sent over the air (except downlink broadcast) is expected
to be acknowledged by the receiver, and if acknowledgement is not received, the data is resent. The sending unit
monitors these resends, and adjusts the operation rate accordingly. A normal system may have links that change
levels of operation as the RF environment changes. Furthermore, the links operate independently; normal operation
can have a downlink running at 6X while the uplink RF environment only supports 2x.
Optimal sector utilization involves having as many links as possible running at 6x. This provides as much capacity
as possible for the sector.
Table 6 Link Budget Details – Dynamic Rate Adapt
Product Parameter
Performance Details
2x 4x 6x
PMP 450
Modulation QPSK-MIMO
16-QAM-
MIMO
64-QAM-
MIMO
5.4/5.8-GHz
Max. LOS
Link Budget
(no fade
margin) – 20
MHz channel
bandwidth
with Integrated SM
antenna
6.7 mi / 10.9
km
2.7 mi / 4.3
km
1 mi / 1.7 km
with LENS that adds
5.5 dB to SM Range
12.7 mi / 20.5
km
5 mi / 8.1 km 2 mi / 3.2 km
with Reflector Dish that
adds 14 dB to SM
Range
34 mi / 54.7 km
13.5 mi / 21.7
km
5.3 mi / 8.6 km
5.4/5.8-GHz
Max. LOS
Link Budget
(no fade
margin) – 10
MHz channel
bandwidth
with Integrated SM
antenna
9.5 mi / 15.4
km
3.8 mi / 6.1
km
1.5 mi / 2.4 km
with LENS that adds
5.5 dB to SM Range
18 mi / 29 km
7.1 mi / 11.5
km
2.8 mi / 4.6 km
with Reflector Dish that
adds 14 dB to SM
Range
40 mi / 64.3 km
19.1 mi / 30.7
km
7.6 mi / 12.2
km
5.4/5.8-GHz
Max.
Aggregate
Throughput
with 1/16
Cyclic Prefix
20 MHz Channel:
(up+down)
30 Mbps 60 Mbps 98 Mbps