Specifications

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Spectrum Master™ Compact Handheld Spectrum Analyzer Features
LTE Signal Analyzers (Option 0541, 0542, 0546, 0551, 0552, 0556)
RF Measurements – Occupied Bandwidth
The bandwidth that contains 99% of the total carrier
power. Excessive occupied bandwidth means excessive
adjacent channel interference.
Modulation Quality – EVM
High or low 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 – Sync Signal Power
Check for uneven amplitude of sub-carriers. Data will
be less reliable on weak sub-carriers, creating a lower
over-all data rate.
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.
RF Measurements
(Option 0541 FDD) (Option 0551 TDD)
Channel Spectrum
Channel Power
Occupied Bandwidth
Power vs. Time (TDD only)
Frame View
Sub-Frame View
Total Frame Power
DwPTS Power
Transmit Off Power
Cell ID
Timing Error
ACPR
Spectral Emission Mask
Category A or B (Opt 1)
RF Summary
Modulation Measurements
(Option 0542 FDD) (Option 0552 TDD)
Power vs. Resource Block (RB)
RB Power (PDSCH)
Active RBs, Utilization %
Channel Power, Cell ID
OSTP, Frame EVM by modulation (FDD only)
Constellation
OPSK, 16 QAM, 64 QAM
Modulation Results
Ref Signal Power (RS)
Sync Signal Power (SS)
EVM – rms, peak, max hold
Frequency Error – Hz, ppm
Carrier Frequency
Cell ID
Control Channel Power
Bar Graph or Table View
RS, P-SS, S-SS
PBCH, PCFICH, PHICH, PDCCH
Total Power (Table View)
EVM
Modulation Results
Tx Time Alignment
Modulation Summary
Includes EVM by modulation
(FDD only)
Antenna Icons
Detects active antennas (1/2)
Over-the-Air (OTA)
(Option 0546 FDD) (Option 0556 TDD)
Scanner
Cell ID (Group, Sector)
S-SS Power, RSRP, RSRQ, SINR
Dominance
Modulation Results – On/Off
Tx Test
Scanner
RS Power of MIMO antennas
Cell ID, Average Power
Delta Power (Max-Min)
Graph of Antenna Power
Modulation Results – On/Off
Mapping
On-screen
S-SS Power, RSRP, RSRQ, or SINR
Scanner
Modulation Results – Off
LTE Signal Analyzers
The Spectrum Master features three
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
Frequency Error
Frequency Error is a check to see that
the carrier frequency is precisely correct.
The Spectrum Master can accurately
measure Carrier Frequency Error OTA if the
instrument is GPS enabled. Calls will drop
when mobiles travel at higher speed. In
some cases, cell phones cannot hand off
into, or out of the cell.
Sync Signal Mapping
Sync Signal Scanner can be used with the
GPS to save scan results for later display
on a map. The EVM of the strongest synch
signal available at that spot is also recorded.
The Cell, Sector, and Group ID information
is also included so that it’s easier to
interpret the results. Once the Synch
Signals are mapped, it becomes much
easier to understand and troubleshoot any
interference or coverage issues.
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