ADTRAN 6000 Series System Manual

Also see for TRACER 6000 SERIES: User manual

Contents

ADTRAN 6000 Series System Manual Manual pdf 24 page image

Section 2 Microwave Path Engineering Basics TRACER 6000 Series Integrated System Manual24 Copyright © 2005 ADTRAN, Inc. 612806420L1-1F6. ANTENNA INFORMATIONThe overall wireless system is directly affected by the antenna selection and installation, discussed in thefollowing sections.Antenna AlignmentWith line-of-sight microwave communications, optimum system performance requires that thetransmitting and receiving antennas are properly aligned. This ensures maximum received signal power ateach receiver. Antenna alignment must be achieved in both azimuth (along a horizontal plane) andelevation (along a vertical plane). By ensuring maximum received signal strength, a received signalstrength indicator (RSSI) helps the equipment installer determine when alignment is maximized.TRACER RSSI Test PointsRSSI for the TRACER 64x0 system is provided through the VT100 terminal menus accessed through theRS-232 interface, and it is presented as a series of bars indicating signal strength. More bars means moreRSSI, which ensures greater received signal strength and better link performance.If both the local and remote end of the system are operational, the remote TRACER 64x0 receive powercan be viewed from the local TRACER 64x0 VT100 terminal menu interface.An RSSI test point located on the front panel provides a DC voltage level (relative to the GND test point)that corresponds to the amount of signal being received from the far end’s transmitter. The voltage at thistest point can vary from approximately 0 to 5 VDC. An RSSI calibration sheet is shipped with the systemto provide the installer a cross-reference between actual received signal level (in dBm) and RSSI voltage.This sheet is useful for verifying link budget calculations and ensuring proper equipment installation.Real-time Signal ValuesThe TRACER 64x0 system displays real-time signal values for R X Q UALITY, R X P OWER, and TX P OWER(for both the local and remote units). R X Q UALITY values are displayed as a numerical value from 0 to 100,with 0 corresponding to poor signal quality and 100 corresponding to exceptional signal quality.R X P OWER values are displayed in dBm within ±5 dBm accuracy and can vary with extreme temperatures.T X POWER values are displayed in dBm within ±1 dBm accuracy.Verify the antenna installation meets all regulations specified in the National ElectricCode (NEC) Article 810 with particular attention to clearances from power and lightingconductors, mounting, grounding, and antenna discharge unit.Real-time signal values are not supported on all TRACER 64x0 systems. Systems must beADTRAN calibrated to provide readings for Rx or Tx Power signal levels.