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Cable Calibr ation Chapter 3: LMF Oper ation
Figure 3 -36 Non -Duplex RX Cable Calibr ation
ti-cdma-06209.eps
SPECTRUM
ANALYZER
SIGNAL
GENERATOR
A
B
SPECTRUM
ANALYZER
SHORT
TEST
CABLE
SHORT TEST
CABLE
CONNECTION TO THE COMMUNICATION
TEST SET OUTPUT PORT
DURING RX MEASUREMENTS.
SIGNAL
GENERATOR
BULLET
CONNECTOR
CONNECTION TO THE RX PORTS
DURING RX MEASUREMENTS.
LONG
CABLE 2
Setting Cable Loss Values
Cable loss values for the TX and RX test cable configurations are normally set by accomplishing
cable calibration using the applicable test equipment. The resulting values are stored in the
cable loss files. The cable loss values can also be set/changed manually .
If cable calibr ation w as performed without using the LMF , cable loss v alues must be
manually entered in the LMF database. F ailure to do this will result in inaccur ate UBS
calibr ation and reduced site performance.
Prerequisites
LMF is logged into the UBS
3 -72 68P09283A63 -5
FOA A UG 2007