GE MDS Mercury 900, Справочное руководство

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142 Mercury Reference Manual 05-4446A01, Rev. E
Table 3-11. Recommended Settings for Common Scenarios
For Fixed Locations, where best combination of range and throughput is desired.
AP Remote Units Notes
Radio Configuration
Network
Name
User
discretion
User
discretion
AP and Remote must match.
Transmit Power
(AP)/
Max Transmit Power (RM)
30
(3650 model: 23)
30
(3650 model: 23)
dBm
In most cases, power can be set to this level
and left alone. Setting it lower helps control
cell overlap.
Receive Power -70 N/A dBm
Sets AP receiver for medium gain. Typical
range: -60, -80 dBm.
Frequency Control
Frequency Mode Static Hopping Static Hopping
Frame Duration 20 20 ms
Changing to 10 ms lowers latency. 5 and 8
ms selections not functional for this release.
Hop Pattern A, B, C, D A, B, C, D
AP and RM must match.
Hop Pattern
Offset
0-13 or 0-6 0-13 or 0-6
AP and RM must match.
Channel
Selection
User
discretion
User
discretion
Disable channels with interference. AP and
RM must match.
TDD Sync Mode GPS Required N/A
GPS Antennas must be connected to both
AP and RM.
Advanced Configuration
Adaptive
Modulation
Enabled Enabled
Protection
Margin
3 3 dB
Hysteresis
Margin
3 3 dB
Data
Compression
Enabled Enabled
Gives best throughput numbers, but may
hide true performance if only tested with
PING or Text File FTP.
Max
Modulation
QAM/16-3-4 QAM16-3/4
Best combination of range and throughput.
Cyclic Prefix 1/16 N/A
Best throughput setting.
Channel
Type
Static N/A
Less periodic ranging when channel type is
Static.
ARQ Enabled N/A
ARQ Block Size 256 N/A bytes
ARQ Block
Lifetime
655 N/A ms
These 3 settings make the max. no. of ARQ
retries =9.
(655 ms)/(35 ms + 35 ms = 9.35=>9
ARQ TX
Delay
35 N/A ms
ARQ RX Delay 35 N/A ms
Adaptive Split Enabled N/A
Maximizes one-way burst throughput.
Downlink% 50 N/A %
If Adaptive Split is disabled, can set
downlink% to 15%–75%.