Atec Anritsu-MT8221B - Manual (Page 10)

10
BTS Master™ Base Station Analyzer Features
LTE and TD-LTE Signal Analyzers (Options 0541, 0542, 0543, 0546, 0551, 0552, 0556)
RF Measurements
(Option 0541/551 FDD/TDD)
Channel Spectrum
Channel Power, Occupied Bandwidth
Power vs. Time (TDD only)
Total Frame Power, DwPTS Power
Transmit Off Power, Cell ID
Timing Error, Frame/Sub-Frame View
ACLR
Spectral Emission Mask
RF Summary
Modulation Measurements
(Option 0542/552 FDD/TDD)
Power vs. Resource Block
Active RBs, Utilization %, Channel Power, Cell ID
Constellation
QPSK, 16 QAM, 64 QAM
Modulation Results
RS Power, SS Power, EVM, Freq Error,
Carrier Frequency, Cell ID
Control Channel Power
Bar Graph or Table View
RS, P-SS, S-SS, PBCH, PCFICH
Total Power (Table View)
Modulation Results
Modulation Summary
Over-the-Air Measurements (OTA)
(Option 0546/556 FDD/TDD)
Scanner – six strongest signals
Cell ID (Group, Sector)
S-SS, RSRP, RSRQ, SINR, Dominance
Tx Test
Scanner – three strongest signals
RS Power of MIMO antennas
Cell ID, Average Power, Delta Power (Max-Min)
Graph Antenna Power
Modulation Results – On/Off
Mapping
On-screen S-SS, RSRP, RSRQ, or SINR
Scanner – three strongest signals
LTE BW = 15, 20 MHz
(Option 543)
Enables 15 and 20 MHz bandwidths for:
RF Measurements (Option 0541/551)
Modulation Measurements (Option 0542/552)
LTE and TD-LTE Signal Analyzers
The BTS Master features three LTE and
TD-LTE measurement modes:
• RF Measurements
• Modulation Measurements
• Over-the Air Measurements (OTA)
The goal of these measurements is
to increase data rate and capacity by
accurate power settings, ensuring low
out-of-channel emissions, and good signal
quality. These attributes help to create a
low dropped call rate, a low blocked call
rate, and a good customer experience.
Cell site technicians or RF engineers can
make measurements Over-the-Air (OTA)
to spot-check a transmitter’s coverage
and signal quality without taking the cell
site off-line. When the OTA test results are
ambiguous one can directly connect to the
base station to check the signal quality
and transmitter power.
Adjacent Channel Leakage Ratio (ACLR)
Adjacent Channel Leakage Ratio (ACLR)
measures how much BTS signal gets into
neighboring RF channels. ACLR checks the
closest (adjacent) and the second closest
(alternate) channels. Poor ACLR can lead
to interference with adjacent carriers
and legal liability. It also can indicate
poor signal quality which leads to low
throughput.
Cell ID (Sector ID, Group ID)
Cell ID indicates which base station is
being measured OTA. The strongest base
station at your current location is selected
for measurement. Wrong values for Cell ID
lead to inability to register. If the cause is
excessive overlapping coverage, it also will
lead to poor EVM and low data rates.
Pass/Fail Test
Set up common test limits, or sets of
limits, for each instrument. Inconsistent
settings between base stations, leads to
inconsistent network behavior.
EVM
High values will create larger areas of
cell-to-cell interference and create lower
data rates near cell edges.
Mapping
On-screen mapping allows field technicians
to quickly determine the downlink
coverage quality in a given geographic
location. Plot S-SS Power, RSRP, RSRQ or
SINR with five user definable thresholds.
All parameters are collected for the three
strongest signals and can be saved as
*.kml and *.mtd (tab delimited) for
importing to third party mapping programs
for further analysis.
Modulation Quality – Power vs. Resource Block
A high utilization of the Resource Blocks would
indicate a cell site in nearing overload and it may be
appropriate to start planning for additional capacity.
Modulation Quality – Control Channels
High values will create larger areas of cell-to-cell
interference and create lower data rates near cell
edges. Low values affect in-building coverage.
Over-the-Air Measurements – Tx Test
By looking at the reference signals of MIMO antennas
one can determine if MIMO is working properly. If the
delta power is too large, there is an issue.
Over-the-Air On-screen Mapping
With Map Master™ import map area on instrument
screen to drive test downlink coverage of S-SS Power,
RSRP, RSRQ, or SINR.