User's Manual

Navini Networks, Inc. Ripwave Base Station I&C Guide
116
Use Formula 1 to calculate Max Tx Power
1
(what the PAs could deliver) for each type of Main
Cable. Use values “A”, “D” and “E” from Table 1 respectively for Max PA Output, BTS Loss,
and RFS Loss; and the values from Formula 14 for RF Cable Loss.
Use Formula 2 to calculate Max Tx Power
2
(maximum value at which the Tx Paths of the BTS
can be calibrated) for each type of Main Cable. Use value “F” from Table 1 for Max SYN Card
Input; the Min Cal Board Loss and Back Plane Loss values given as Input Data; and the values
from Formula 14 for CAL Cable Loss.
Choose the lower value of the previous two for each type of Main Cable. This is the actual Max
Tx Power. (Formula 3).
Use Formula 4 to calculate Min Tx Power (minimum value at which the Tx Paths of the BTS can
be calibrated) for each type of Main Cable. Use value “G” from Table 1 for Min SYN Card
Input; the Max Cal Board Loss and Back Plane Loss values given as Input Data; and the values
from Formula 14 for CAL Cable Loss.
Use Formula 5 to calculate Max Rx Sensitivity (maximum value at which the Rx Paths of the
BTS can be calibrated) for each type of Main Cable. Use value “H” from Table 1 for Max SYN
Card Output; the Min Cal Board Loss and Back Plane Loss values given as Input Data; and the
values from Formula 14 for CAL Cable Loss.
Use Formula 6 to calculate Min Rx Sensitivity (minimum value at which the Rx Paths of the
BTS can be calibrated) for each type of Main Cable. Use value “I” from Table 1 for Min SYN
Card Output; the Max Cal Board Loss and Back Plane Loss values given as Input Data; and the
values from Formula 14 for CAL Cable Loss.
Build Table H5. You may also calculate the Maximum EIRP for each cable combination by
adding the Gain per Antenna Element (12 dB if Omni, 17 dB if Panel to the Max Tx Power.
6. The following is an example of the calculations performed with the Cable Selection
Spreadsheet with the data shown in Figure H1
Figure H5 – Results