Changes between Version 161 and Version 162 of WiMAXInteg


Ignore:
Timestamp:
04/15/10 15:49:29 (12 years ago)
Author:
hmussman@bbn.com
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • WiMAXInteg

    v161 v162  
    316316=== 6.4  GPS Antenna ===
    317317
    318 A GPS antenna assembly is provided, and connected to the IDU, to provide a stable and precise timing source to the base station.  The antenna assembly is connected to the IDU using a 50-ohm coax, that carries the receivedsignal to the IDU, and power to the antenna assembly.  [[BR]]
    319 
    320 The GPS antenna assembly can be mounted in any outdoor location where it can "see" the sky, but we will assume that it is mounted in the same location as the WiMAX antenna.
    321 
    322 
    323 The suggested GPS antenna assembly is the [http://www.antenna.com/apg_products.cgi?id_num=11092  PCTel GPS-TMG-SPS-40NCB]  timing reference antenna.  It provides:
     318A GPS antenna assembly is provided, and connected to the IDU, to provide a stable and precise timing source to the base station. [[BR]]
     319
     320The antenna assembly is connected to the NEC IDU using a 50-ohm coax, that carries the received signal to the IDU, and power to the antenna assembly.  [[BR]]
     321
     322Connectors:[[BR]]
     323 * NEC IDU:  GPS Antenna Terminal (GPS ANT): BNC connector[[BR]]
     324 * GPS antenna:  N, female  (one - bottom fed)[[BR]]
     325
     326
     327The GPS antenna assembly can be mounted in any outdoor location where it can "see" the sky, but we will assume that it is mounted in the same location as the WiMAX antenna.[[BR]]
     328
     329
     330The suggested GPS antenna assembly is the [http://www.antenna.com/apg_products.cgi?id_num=11092  PCTel GPS-TMG-SPS-40NCB]  timing reference antenna.  It provides:[[BR]]
    324331 * integrated lightning protection  [[BR]]
    325  * heavy duty mounting clamp
    326  * amplifier with 40 dB of gain
    327 
    328 The amplifier with 40 dB of gain compensates for loss in the 50-ohm coax cable run from the GPS antenna assembly at outside site, to the IDU at the indoor site.
    329 
    330 The suggested 50-ohm coax cable is [http://www.l-com.com/multimedia/diagrams/D_RG58C-_.JPG  RG58C/U], which has a loss at the GPS frequency of approxiamately 1000MHz of 40 dB for 200 ft of cable.
     332 * heavy duty mounting clamp[[BR]]
     333 * amplifier with 40 dB of gain[[BR]]
     334
     335The amplifier with 40 dB of gain compensates for loss in the 50-ohm coax cable run from the GPS antenna assembly at outside site, to the IDU at the indoor site.[[BR]]
     336
     337The suggested 50-ohm coax cable is [http://www.l-com.com/multimedia/diagrams/D_RG58C-_.JPG  RG58C/U], which has a loss at the GPS frequency of approxiamately 1000MHz of 40 dB for 200 ft of cable.[[BR]]
    331338
    332339Typical cable components:[[BR]]
    333340 *  [http://www.l-com.com/productfamily.aspx?id=70  BNC-male to BNC-male cable], multiple lengths.[[BR]]
    334341 *  [http://www.l-com.com/item.aspx?id=347  BNC-male to BNC-male cable], 200 ft length.[[BR]]
    335  *  [http://www.l-com.com/item.aspx?id=5261  BNC-female to BNC-female connector], to join two cables with N-male connectors.  [[BR]]
    336  *  [http://www.l-com.com/item.aspx?id=5261  BNC-female to N-male connector], to join a BNC-male cable to the GPS antenna assembly  [[BR]]
     342 *  [http://www.l-com.com/item.aspx?id=5256  BNC-female to BNC-female connector], to join two cables with N-male connectors.  [[BR]]
     343 *  [http://www.l-com.com/item.aspx?id=20976  BNC-female to N-male connector], to join a BNC-male cable to the GPS antenna assembly  [[BR]]
    337344 
    338 
    339 
    340 
    341 Connectors:
    342 
    343 NEC IDU:  GPS Antenna Terminal (GPS ANT): BNC connector
    344 
    345 GPS antenna:  N, female  (one - bottom fed)
    346 
    347 
    348 
    349345
    350346