User's Manual Part 2

Bay Level Offset Calibration – continued
6-78 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU MAY 2004
PRELIMINARY
CAL File and BLO Data Download
When BLO data is downloaded to the BBXs after calibration, the data is
downloaded to the devices in the order it is stored in the CAL file. TX
calibration data (entries C[1] – C[60]) are sent first. Data for the ten
BBX slot 1 calibration points (entries C[1] – C[20]) are sent initially,
followed by data for the ten BBX slot 2 calibration points (entries C[21]
– C[40]), and so on. The RX calibration data is sent next in BBX slot
sequence, followed by RX Diversity calibration data.
BLO for Expansion BTS
The BLO Ranges for expansion BTS configurations are listed below:
Low Power
S 1 to 4 carriers: –13  7 dB
S 5 to 8 carriers: –17  7dB
High Power (1 or 2 cCLPAs)
S 1 to 4 carriers: 45 7 dB
S 5 to 8 carriers: 41  7dB
Test Equipment Setup for
RF Path Calibration
Follow the procedure in Table 6-31 and refer as needed to Figure 6-14 or
Figure 6-15 to set up test equipment.
Table 6-31: Procedure to Set Up Test Equipment for RF Path Calibration
Step Action
1 If it has not already been done, refer to the procedure in Table 6-6 (on page 6-17) to interface the LMF
computer terminal to the frame LAN A connector.
2 If it has not already been done, refer to Table 6-7 (on page 6-25) to start a GUI LMF session.
3 If not already done, select test equipment per the procedure in Table 6-23 or Table 6-24.
4 If required, calibrate the test equipment per the procedure in Table 6-25.
! CAUTION
To prevent damage to the test equipment in high power configurations, all transmit (TX) test
connections must be via the 30 dB directional coupler for 800 MHz.
Attenuators are not required for low power configuration.
5 For TX path calibration, connect the test equipment as shown in Figure 6-14, Figure 6-15, or
Figure 6-16, depending on the communications analyzer being used.
6