Instruction Manual
Table Of Contents
- Contents
- Figures
- Tables
- General Safety
- Introduction
- Preliminary Operations
- Optimization/Calibration
- Automated Acceptance Test Procedures (ATPs)
- Leaving the Site
- Basic Troubleshooting
- Data Sheets
- Test Matrix
- BBX Gain Set Point vs BTS Output
- CDMA Operating Frequency
- PN Offset/I & Q Register
- Test Equipment Preparation
- In-Service Calibration
- Index
Initial Power Up – continued
Apr 2001
2-9
SC4812ET BTS Optimization/ATP — CDMA LMF
DRAFT
Table 2-7: RF Cabinet Power Up
Step Action
6 Measure the voltage drop between the Power Cabinet meter test point and the 27 V buss bar inside the
RF Cabinet PDA while the RF Cabinet is transmitting.
NOTE
For a three (3) sector carrier system, the voltage drop should be less than 0.2 V.
For a twelve (12) sector carrier system, the voltage drop should be less than 0.3 V.
7 Using a DC current probe, measure the current in each of the six (6) DC cables that are connected
between the RF and Power Cabinet. The DC current measured should be approximately the same. If
there is a wide variation between one cable and the others (>20 A), check the tightness of the
connections (torque settings) at each end of the cable.
RF CABINET
(Rear View)
27V
27V Ret
Figure 2-5: RF Cabinet Circuit Breaker Panel and 27V DC Terminal Locations
MAIN BREAKER
5 RU RACK
SPACE
SC 4812ET BTS RF Cabinet
(Front View)
400
30
30
30
30
30
30
30
30
50
50
50
L
P
A
1B
1D
2B
2D
3B
3D
4B
4D
1A
1C
2A
2C
3A
3C
4A
4C
PS1
PS2
PS3
C
C
C
P
25
25
ETIB
OPTION
10
15
HEAT EXCHANGER
CAUTION
SHUT OFF BOTH BREAKERS
ONLY DURING HEAT EXCHANGER
MAINTENANCE OR REPAIR
LPA
BLOWERS
PUSH BUTTON
TO RESET
LPA BLOWERS
FW00307
I/O Plate + and – DC Feed
Terminals (Back Panel of RF
Cabinet)
2