Chapter 1: Configuration
Configuring radio parameters
Page
1-214
Cambium co-location tool
As an alternative to using the frame calculator on the AP GUI, cambium provides a co-location tool for
these calculations. This tool is a free download available on the Cambium website:
https://support.cambiumnetworks.com/files/colocationtool/#r2
MIMO-A mode of operation
450 Platform Family supports MIMO-B mode using the following modulation levels: QPSK, 16-QAM, 64-
QAM and 256-QAM. System Release 13.2 introduces MIMO-A mode of operation using the same
modulation levels as the MIMO-B mode. With MIMO-B, the radio sends different streams of data over the
two antennas whereas with MIMO-A, the radio uses a scheme that tries to optimize coverage by
transmitting the same data over both antennas. This redundancy improves the signal to noise ratio at
the receiver making it more robust, at the cost of throughput.
In addition to introducing MIMO-A modes, improvements have been made to the existing rate adapt
algorithm to switch between MIMO-A and MIMO-B seamlessly without any intervention or added
configuration by the operator. The various modulation levels used by the 450 Platform Family are
shown in
Table 71 450 Platform Family Modulation levels
Rate
MIMO-B
MIMO-A
QPSK
2X MIMO-B
1X MIMO-A
16-QAM
4X MIMO-B
2X MIMO-A
64-QAM
6X MIMO-B
3X MIMO-A
256-QAM
8X MIMO-B
4X MIMO-A
Mode
PMP
Mode
PMP
Channel Bandwidth (MHz)
20
Channel Bandwidth (MHz)
20
Max Range (mi)
2
Max Range (mi)
2
One way air delay (ns)
10000
One way air delay (ns)
10000
Calculated PTP range (mi)
1.861
Calculated PTP range (mi)
1.861
Dowlink Data
75%
Downlink Data
80%
Contention slots
3
Contention Slots
3
Frame Period (ms)
2.5
Frame Period (ms)
2.5
DL end
1.644
DL end
1.741
UL start
1.797
UL start
1.894
DL/UL symbols
61/20
DL/UL symbols
65/16
DL/UL/Total Throughput (Mbps)
98.3/31.1/129.4
DL/UL/Total Throughput (Mbps)
104.9/24.6/129.5
Device 1 DL end
1.644
<
Device 2 UL start
1.894
OK
Device 2 DL end
1.741
<
Device 1 UL start
1.797
OK
PMP/PTP 450/450i/450m CO-LOCATION TOOL AND THROUGHPUT CALCULATOR
Device 1 Configuration
Device 2 Configuration
Device 1 Timing (ms)
Device 2 Timing (ms)
CHECKS
Release 15.1.1
Co-location not possible with mismatched frame lengths
Summary of Contents for PMP 450 AP
Page 51: ...Chapter 1 Configuration Quick link setup Page 1 23 ...
Page 155: ...Chapter 1 Configuration Configuring security Page 1 127 ...
Page 163: ...Chapter 1 Configuration Configuring security Page 1 135 ...
Page 164: ...Chapter 1 Configuration Configuring security Page 1 136 ...
Page 193: ...Chapter 1 Configuration Configuring radio parameters Page 1 165 ...
Page 194: ...Chapter 1 Configuration Configuring radio parameters Page 1 166 ...
Page 195: ...Chapter 1 Configuration Configuring radio parameters Page 1 167 ...
Page 206: ...Chapter 1 Configuration Configuring radio parameters Page 1 178 ...
Page 210: ...Chapter 1 Configuration Configuring radio parameters Page 1 182 ...
Page 636: ...Chapter 5 Troubleshooting Logs Page 5 16 Figure 95 SM Authorization log ...