155 | | Install the antenna following Sec 1 - 5 of the [attachment:ANTENNA.pdf NEC Sector Antenna Installation Manual] |
156 | | |
157 | | Since throughput and coverage of WiMAX systems are highly influenced by the antenna location, care should be taken that the antenna is mounted so that significant portion of First Fresnel Zone is clear of obstructions. Ideally the antenna is mounted on the elevated structure providing clear line of sight to most of the intended coverage area. |
| 155 | To install the antenna: |
| 156 | * Follow Sec 1 - 5 of the [attachment:ANTENNA.pdf NEC Sector Antenna Installation Manual] |
| 157 | * Antenna height is limited to 6 m above the roof of the building, for reasons of aircraft safety. |
| 158 | * Since throughput and coverage of WiMAX systems are highly influenced by the antenna location, care should be taken that the antenna is mounted so that significant portion of First Fresnel Zone is clear of obstructions. Ideally the antenna is mounted on the elevated structure providing clear line of sight to most of the intended coverage area. |
174 | | |
175 | | * Connect two coaxial cables between Outdoor Unit and Antenna, including lightning protectors. See Sec 3.4.2.3, Fig 3-9, 4-1, and Sec 6.4 of the[attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)] |
176 | | |
177 | | ISSUE: Does kit contain these cables? |
178 | | |
179 | | * Connect one -48VDC power cable from indoor equipment room to Outdoor Unit. See Sec 3.4.1, Fig 4-1 and Sec 6.3 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)] |
180 | | |
181 | | * Connect two optical fiber signal cablesfrom indoor equipment room to Outdoor Unit. See Sec 3.4.1, Fig 4-1 and Sec 6.4 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)] |
| 175 | * Connect a coaxial cable between Outdoor Unit and Antenna, including lightning protectors. See Sec 3.4.2.3, Fig 3-9, 4-1, and Sec 6.4 of the[attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)] |
| 176 | * Connect the -48VDC power cable from indoor equipment room to Outdoor Unit. See Sec 3.4.1, Fig 4-1 and Sec 6.3 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)] |
| 177 | * Connect the dual optical fiber cable from indoor equipment room to Outdoor Unit. See Sec 3.4.1, Fig 4-1 and Sec 6.4 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)] |
198 | | |
199 | | === 8.10 Install 120VAC and -48VDC Power Feeds and/or Supplies === |
200 | | |
201 | | |
202 | | Provide -48VDC feeds for Base Station Outdoor Unit (max 4A) and Base Station Indoor Unit (max 8.3A), or else provide -48VDC rectifiers run from 110VAC feeds to supply these loads. |
203 | | |
204 | | ISSUE: If -48VDC rectifiers are required, what is recommended? Individual units for each load? Sized to suuport a fully populated Base Station Indoor Unit? Or less? |
205 | | |
206 | | Provide 110VAC feeds for Linux Servers, Ethernet switch (if provided), and -48VDC rectifiers (if provided). |
207 | | |
208 | | ISSUE: If possible, the 110VAC feeds should be protected with an Uninterruptible Power Supply (UPS) that bridges short power gaps, to prevent disrupting the WiMAX testbed from the most common (short) power gaps. If this is not available, should one be added? If so, what is recommended? |
209 | | |
| 190 | === 8.10 Install 120VAC feeds and -48VDC Power Supplies === |
| 191 | |
| 192 | * Provide 110VAC feeds for Linux Servers, Ethernet switch (if provided), and -48VDC power supplies. |
| 193 | * If possible, the 110VAC feeds should be protected with an Uninterruptible Power Supply (UPS) that bridges short power gaps, to prevent disrupting the WiMAX testbed from the most common (short) power gaps. |
| 194 | * Install -48VDC power supplies for Base Station Outdoor Unit (max 4A) and Base Station Indoor Unit (max 8.3A), and connect them to 110VAC feeds. |