User Manual

ADCP-75-192 • Issue D • October 2005 • Section 5: BTS Optimization
Page 5-2
 2005, ADC Telecommunications, Inc.
Table 5-1. BTS Parameters
BTS
MANUFACTURER
REQUIRED CHANGE PARAMETER PERFORMANCE PROBLEM
Ericsson
Disable DC Bias on BTS Rx Ports BTS Bias Alarm
Increase 10 dB SSB Level (carrier sealing
level)
Unable to place call on
sealed carrier
Increase 8 dB over
BTS-only settings
SSI (Power Increase) level Repeater/Tower
handoff unbalanced
Increase 8 dB over
BTS-only settings
SSD (Power Decrease) level Repeater/Tower
handoff unbalanced
Lucent
Enable Shortened Burst Mode No calls initiated
Change from 0 to 2. Page 5 of FCI form, field 94 No calls initiated
Set to 2. (Max delay
setting)
If Page 5 is full, go to page 6
of FCI form, field 118
No calls initiated
Disable Hobbit Intracell handoff occur
Nortel Change from
normal to ABBREV
DCCHDATA datafill FIELD 6 No calls initiated
Disable TLR (TDMA Locate Receiver) No hand ins
Change from enable
to DISABLE for
each sector pair, i.e.
Z into X as well as
X into Z.
HOPAIR datafill NBHO field No handoffs or hand ins
2.2 CDMA
There are four BTS parameters that are unique to the operation of a Digivance CXD sector.
Along with these, the standard search window settings must be adjusted to compensate for the
distributed antenna configuration. The first four BTS parameters are:
• Transmit propagation delay (add 100 usec to normal setting)
• Receive propagation delay (add 100 usec to normal setting)
• Maximum differential transmit delay
• Sector size
The transmit propagation delay compensates for the forward link delay from the channel
element of the cell to the transmit antenna of the nearest RAN in the sector. This parameter
determines the system ‘zero time’ for the sector from which all other delays in the forward
direction are measured.