User's Manual

Optimization/Calibration – Introduction – continued

May 2000

3-3

SC 4812T CDMA BTS Optimization/ATP

 Effective Rated Power (ERP) table for all TX channels to antennas

respectively. Motorola System Engineering specifies the ERP of a

transmit antenna based on site geography, antenna placement, and

government regulations. Working from this ERP requirement, the

antenna gain, (dependent on the units of measurement specified) and

antenna feed line loss can be combined to determine the required

power at the top of the BTS frame. The corresponding BBX2 output

level required to achieve that power level on any channel/sector can

also be determined.

Refer to the CDMA LMF Operator’s Guide, 68P64114A21,

for additional information on the layout of the LMF

directory structure (including CDF file locations and

formats).

NOTE

BTS System Software

Download

BTS system software must be successfully downloaded to the BTS

processor boards before optimization can be performed. BTS operating

code is loaded from the LMF computer terminal.

Before using the LMF for optimization/ATP, the correct

bts–#.cdf and cbsc–#.cdf files for the BTS must be

obtained from the CBSC and put in a bts–# folder in the

LMF. Failure to use the correct CDF files can cause wrong

results. Failure to use the correct CDF files to log into a

live (traffic carrying) site can shut down the site.

IMPORTANT

The CDF is normally obtained from the CBSC on a DOS formatted

diskette, or through a file transfer protocol (ftp) if the LMF computer has

ftp capability. Refer to the CDMA LMF Operator’s Guide, or the LMF

Help screen, for the procedure.

Site Equipage Verification

If you have not already done so, use an editor to view the CDF, and

review the site documentation. Verify the site engineering equipage data

in the CDF matches the actual site hardware using a CDF conversion

table.

Always wear a conductive, high impedance wrist strap

while handling any circuit card/module to prevent damage

by ESD. Extreme care should be taken during the removal

and installation of any card/module. After removal, the

card/module should be placed on a conductive surface or

back into the anti–static bag in which it was shipped.

CAUTION