Project Description

0872-EX-PL-2014 Text Documents

FreeWave Technologies, Inc.

2014-12-09ELS_156727

Keystone Alpha Test Plan November 30, 2014

Table of Contents Summary 3 Wireless Topology.................................................................................................................................. 4 Test Configurations: ............................................................................... Error! Bookmark not defined.

Summary This document is to cover the network architecture, wireless topology and system configuration for the Keystone Alpha test using commercial towers. Keystone is a broadband radio platform which supports frequency ranging from 100MHz to 6GHz with channel bandwidth ranging from 12.5kH to 20MHz. The Alpha test will conducted in both the 900 MHz MAS band and the upper 4 MHz of the 915 ISM band. The 900MHz MAS radio is defined as:  Radio Interface Single, Narrowband Radio o RF Spectrum Licensed 928-960MHz o Transmitter Output up to 5 Watt o Antennas Omni and Directional  Network Interface 2 Ethernet and 2 Serial Ports o Ethernet Ports 10/100 Mbps, Auto-Sensing o Serial Ports RS-232 o USB Micro B for device configuration o Power 7 to 30VDC  Enclosure Rugged  Airlink: o Modulation QPSK, 16QAM, 64QAM o FEC ½ rate o Duty Cycle Half Duplex o Channel Size 12.5kHz, 25kHz and 50 kHz channel sizes o Layer 2 ARQ  Test Applications: o Ping Variable size pings o Iperf TCP Iperf TCP throughput testing o RTU Polling data over the airlink o HTTP Polling WP GUI pages The 915 MHz ISM radio is defined as:  Radio Interface Single, Narrowband Radio o RF Spectrum 926 MHz +/- 1.5 MHz o Transmitter Output up to 1 Watt o Antennas Omni directional  Network Interface 2 Ethernet and 2 Serial Ports o Ethernet Ports 10/100 Mbps, Auto-Sensing o Serial Ports RS-232 o USB Micro B for device configuration

o Power 7 to 30VDC  Enclosure Rugged  Airlink: o Modulation QPSK, 16QAM, 64QAM o Modulation Symbol Rate 2.4 Msps with 30 % excess Raised Cosine pulse shape o FEC ½ rate o Duty Cycle Half Duplex o Channel Size 3 MHz o Layer 2 ARQ  Test Applications: o Ping Variable size pings o Iperf TCP Iperf TCP throughput testing o RTU Polling data over the airlink o HTTP Polling WP GUI pages Wireless Topology Below is the wireless topology for the 900 MHz MAS test setup. The 900MHz Omni antennas will be installed at the FreeWave Office and Arapahoe towers for point to point as well as Point to Multipoint testing with shorter range. The 900MHz Yagi antennas will be installed at the Arapahoe and Erie Tower for point to Point testing with longer distance.

Overall Wireless Topology 900MHz omni EAN0906NF, 8.15 dBi 900MHz omni EAN0906NF, 8.15 dBi 2.33 miles 8.99 miles Wavelink PRO890‐16 Wavelink PRO890‐16 16 dBi 16 dBi FreeWave Office Arapahoe/75th Tower Erie Tower 40° 1'36.24"N, 105°13'40.05"W 40° 0'43.00"N, 105°11'18.00"W 40° 1'44.88"N, 105° 1'13.44"W FreeWave Ofice Tower Antenna Arapahoe Tower Antenna Description: Erie Antenna Description Description: 900 MHz omni ‐100’ antenna height, 150’ FreeWave Test wrapped with red 900 MHz omni ‐60’ antenna height, 80’ cable, marked as red and connected to the 900 MHz cable, marked as red WaveLink Yagi 900 MHz Yagi (16 dBi) pointed to Erie – 85' antenna height, 100’ cable, marked as Yellow. Figure 1: Experimental Radio Network Configuration Parameters The 915 MHz ISM testing will only be done as a point‐to‐point between the Boulder office and the Arapahoe tower with the omni antennas, and in a point‐to‐multipoint configuration between the Boulder office omni antenna and multiple locations near the Boulder office. Link Analysis The following table is a link analysis assuming only 1 Watt transmit power levels. We may go up to 5 Watts for some testing, but it does not appear that is required. At 1 Watt transmit power the links should have 30 dB margin at 50 kHz channel bandwidth and 40 dB margin for the 12.5 kHz channel bandwidth. This is seen in the table by comparing the Link Loss Budget values against the Estimated Link Losses values. For the 915 MHz ISM testing the link loss budget is 121.7 dB. The estimated link loss between the Boulder office and the Arapahoe tower is 103 dB. So, there is adequate margin for the testing.

Free Space Path Loss @ 2 Miles & 940 MHz (dB) 103.3 Free Space Path Loss @ 9 Miles & 940 MHz (dB) 115.1 Link Loss Budget (dB) 1 Watt Tx Power (30 dBm) 30 Receiver Sensitivity @ 9600 Bps (dBm) ‐115.7 145.7 Receiver Sensitivity @ 19.2 kbps (dBm) ‐112.7 142.7 Receiver Sensitivity @ 38.4 kbps (dBm) ‐109.7 139.7 Receiver Sensitivity @ 2.4 Msps (dBm) ‐91.7 121.7 Omni Antenna Gain (dBi) 8 Yagi Antenna Gain (dBi) 16 LMR 300 LMR 900 Cable Loss at Araphoe Tower 150 ft. Max (dB) 10 3 Cable Loss at Erire Tower 150 ft. max (dB) 10 3 Cable Loss at Boulder Office 100 ft. max (dB) 6 3 Araphoe Estimated Link Losses (dB) Omni Erie Yagi Boulder Omni 103.3 Arapahoe Yagi 103.1 Table 1: Link Analysis Summary


Document Created: 2014-12-09 10:34:54
Document Modified: 2014-12-09 10:34:54
© 2026 FCC.report
This site is not affiliated with or endorsed by the FCC