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viiiWCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Getting Started
Getting Started
Product Description
This section provides an overview of the product capabilities.
The WCA230A & WCA280A Wireless Communication Analyzers Option 26 is an
analysis software option that adds transmitter measurements capability for
1xEV -DO forward link (3GPP2 C.S0032) and reverse link (3GPP2 C.S0033) to the
analyzers.
You can perform the following 1xEV-DO measurements:
Modulation accuracy
Code domain power
Channel power
OBW (occupied bandwidth)
ACPR (Adjacent channel power ratio)
Spectrum emission mask
Gated output power (forward link only)
Intermodulation
CCDF
Pilot to code channel
In addition, the option provides pre-defined measurement limits for the ACPR,
spectrum emission mask, and gated output power measurements. Using these
measurement limits, you can easily check that the input signal meets the
specification.
WCA230A/WCA280A Option 26 1xEV-DO Analysis Software User Manual1-1
Getting Started
1-2WCA230A/WCA280A Option 26 1xEV-DO Analysis Software User Manual
Operating Basics
Functional Overview
This section provides an overview of the Option 26 measurement functions.
Figure 2-1 shows the measurement functions and how to access each measurement
function from the front-panel menu key.
Other option name
(if installed)
MODE
S/A
DEMOD
TIME
DEMOD
menu
Analog Demod
Digital Demod
Standard...
Standard
menu
1xEV-DO-Fwd
1xEV-DO-Rev
Measurement functions
added by Option 26
Modulation Accuracy
Code Domain Power
Channel Power
OBW
MEASURE
menu
MEASURE
menu
ACPR
Spectrum Emission Mask
Gated Output Power
Intermodulation
CCDF
Pilot to Code Channel
Modulation Accuracy
Code Domain Power
Channel Power
OBW
ACPR
Spectrum Emission Mask
Intermodulation
CCDF
Pilot to Code Channel
Figure 2-1: Menu diagram showing measurement functions available in Option 26
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-1
Functional Overview
Accessing a Measurement
Function
All of the measurement functions available in Option 26 can be selected from the
DEMOD (demodulation) mode.
Perform the following procedure to access any of the measurement functions:
1. Press the DEMOD menu key to open the DEMOD menu.
2. Press the Standard... side key to open the Standard menu.
3. Press the 1xEV-DO Fwd or 1xEV-DO Rev side key to open the MEASURE
menu for the standard.
4. Press one of the side keys to select the measurement that you want to perform.
If the desired measurement is not displayed on the current MEASURE menu,
press the Go to page 2 (of 2) side key to open the next page.
5. If needed, set frequency, span, and amplitude of the input signal.
Refer to the WCA230A & WCA280A Portable Wireless Communication Analyzers User Manual for information on how to set frequency, span, and
amplitude.
2-2WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Forward Link Measurements
This section describes the functions and features of the 1xEV-DO forward link
measurements. Each measurement description contains general information about
the measurement, descriptions of the measurement displays and functions available
through menu selections.
The information is divided into the following subsections:
Modulation accuracy measurement
Code domain power measurement
Channel power measurement
OBW measurement
ACPR measurement
Spectrum emission mask measurement
Gated output power measurement
Intermodulation measurement
CCDF measurement
Pilot to code channel measurement
NOTE. If you are not familiar with the operation of the WCA230A/WCA280A, r efer
to the WCA230A & WCA280A Portable Wireless Communication Analyzers User
Manual before reading this section.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-3
1xEV-DO Forward Link Measurements
Modulation Accuracy Measurement
The modulation accuracy measurement measures Rho (ratio of the correlated
power to the total power), EVM (Error Vector Magnitude), magnitude error, phase
error, frequency error, and origin offset. Figure 2-2 shows an example of the
modulation accuracy measurement.
Figure 2-2: Modulation accuracy measurement
Display Elements
2-4WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
The following information is shown in the modulation accuracy measurement
display:
Overview: This view can contain power versus time or spectrogram.
Subview: This view can contain spectrum, EVM, magnitude error, phase
error, IQ power graph, and constellation.
Main view: This view can contain modulation accuracy, EVM, magnitude
error, phase error, and symbol table.
The display contents in each view can be changed using the VIEW DEFINE menu.
Refer to Changing the View Contents on page 2-6 for more information about the
VIEW DEFINE menu.
1xEV-DO Forward Link Measurements
Setting the Timing
Parameters
You can set the following timing parameters using the TIMING menu. Press the
TIMING key to open the TIMING menu.
Acquisition (chips): Sets the acquisition length in chips. The range depends
on the acquisition memory size and the span setting.
Acquisition Length (s): Displays the acquisition length in seconds.
Acquisition History: Specifies the number of the block to display and
analyze. The latest block is number zero. Older blocks have larger negative
numbers.
Analysis Interval: Sets the analysis interval in half slots. The range depends
on the acquisition length setting.
Analysis Offset: Sets the start point of the analysis with respect to the left end
of the acquisition length in half slots.
Spectrum Length: Displays the time length for FFT processing of the
spectrum displayed in the subview. This value is equivalent to one frame
acquisition length.
Spectrum Offset: Sets the beginning of Spectrum Length with respect to the
left end of the acquisition length.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for detailed information about the timing parameters.
Setting the Measurement
Parameters
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Analyze: Performs analysis for the time slots in the analysis range.
Measurement Level: Selects the measurement level for the measurement.
You can select Chip (chip level) or Symbol (symbol level). When Overall is
selected in the Channel Type menu item, you cannot select Symbol.
Channel Type...: Select the channel type to be measured. When Symbol is
selected in the Measurement Level menu item, you can select MAC, Pilot,
Data, or Preamble. When Chip is selected in the Measurement Level menu
item, you can select Overall, MAC, Pilot, Data, or Preamble.
PN Offset: Sets the PN of fset in units of 64 chips. You can set the value from
0 to 511.
Select HalfSlot: Sets the half slot for the measurement.
Select Code: Sets the code in the half slot for the measurement. This setting is
only available when Measurement Level is set to Symbol.
Active Channel Threshold: Sets the active channel threshold level (in dB
from the pilot) used for deciding whether a code channel is active or inactive.
You can set the value from -100 dB to 0 dB.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-5
1xEV-DO Forward Link Measurements
Measurement Filter...: Selects the measurement filter to apply when
calculating EVM and other modulation accuracy results. Y ou can select None,
cdma2000, or cdma2000+EQ (equalizer).
IQ Swap: Sets whether to swap the I and Q data streams before demodulation.
Limits...: Sets the pass/fail limits for the modulation accuracy measurement.
When pressing this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-55 for more information.
Changing the View
Contents
You can change the view contents in the overview, subview, and main view using
the VIEW DEFINE menu. Press the View: DEFINE key to display the VIEW
DEFINE menu.
Show Views: Selects the view style on the screen. You can sele ct Single or
Multi.
Overview Content...: Selects a view to display in the overview. You can
select Spectrogram or Waveform (power versus time).
Subview Content...: Selects a view to display in the subview:
Spectrum: Displays spectrum of the measured signal.
EVM: Displays changes of EVM (Error Vector Magnitude) over time.
MagErr: Displays changes of magnitude error over time.
PhaseErr: Displays changes of phase error over time.
IQ Power Graph: Displays changes of I and Q powers over time. Refer
to IQ Power Graph Display on page 2-19.
Constellation: Displays the signal as an I-Q constellation.
Mainview Content...: Selects a view to display in the main view. You can
select Modulation Accuracy, EVM, MagErr , PhaseErr , or Symbol T able. Refer
to Scale and Format in the Main V iew on page 2-7 for more in formation about
the views.
Menu Off: Hides the side menu. T o display the menu again, press the MENU
side key or VIEW: DEFINE key.
2-6WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Forward Link Measurements
Scale and Format in the
Main View
1: second half slot
This subsection describes the scale settings and display format in the main view.
Modulation Accuracy Display. When you select Mainview Content from the VIEW
DEFINE menu and then select Modulation Accuracy from the Mainview Content
submenu, an IQ rectangular graph and the measured value for Rho, peak code
domain error, rms and peak EVM, magnitude error, phase error, frequency error,
IQ origin offset, and Tau (timing error) are displayed (see Figure 2-3).The peak
code domain error is displayed only when the Measurement Level menu item is set
to Symbol, and Tau is displayed only when an external trigger signal is applied.
Half slot number
0: first half slot
Number of preamble chips
Number of data chips
IQ rectangular graph
(Vector display)
Figure 2-3: Modulation accuracy display
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Measurement Content...: Selects vector or constellation display.
Vector: Selects vector display . A signal represented with phase and amplitude
is displayed in rectangular (I and Q) coordinates. The red point indicates the
symbol position on the measured signal, and the yellow trace indicates the
locus of the signal between symbols.
Constellation: Selects constellation display. It is the same as the vector
display, except that only symbols of the measured signal are indicated in red,
and the locus between symbols is not shown. The cross marks indicate symbol
positions of an ideal signal.
NOTE. I and Q signals are normalized to prevent the scale from changing when
signal attenuation changes.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-7
1xEV-DO Forward Link Measurements
EVM Display. When you select Mainview Content from the VIEW DEFINE menu
and then select EVM from the Mainview Content submenu, changes of EVM
(Error Vector Magnitude) over time are displayed for each chip or symbol (see
Figure 2-4).
Symbol number
Horizontal Start
Code number and channel number
Vertical Scale
Vertical Start
Horizontal Scale
Figure 2-4: EVM display
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis to display the
entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis (number of chips or
symbols).
Horizontal Start: Sets the chip number or symbol number of the first (left)
value of the horizontal axis.
Vertical Scale: Sets the scale of the vertical axis.
Vertical Start: Sets the minimum (bottom) value of the vertical axis.
Full Scale: Sets the scale of vertical axis to the default full-scale value.
Measurement Content...: Selects the display content in the main view. You
can select EVM, MagErr, or PhaseErr. This selection can also be made from
Mainview Content in the VIEW DEFINE menu.
2-8WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Forward Link Measurements
MagErr Display. When you select Mainview Content from the VIEW DEFINE
menu and then select MagErr from the Mainview Content submenu, changes of
magnitude error over time are displayed for each chip or symbol (see
Figure 2-5).
Symbol number
Horizontal Start
Code length and channel number
Vertical Scale
Horizontal Scale
Figure 2-5: MagErr display
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis automatically
to display the entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis (number of chips or
symbols).
Horizontal Start: Sets the chip number or symbol number of the first (left)
value of the horizontal axis.
Vertical Scale: Sets the scale of the vertical axis.
Vertical Offset: Sets the offset value of the vertical axis. Y ou can set the value
from -200% to 200%.
Full Scale: Sets the scale of vertical axis to the default full-scale value.
Measurement Content...: Selects the display content in the main view. You
can select EVM, MagErr, or PhaseErr. This selection can also be made from
Mainview Content in the VIEW DEFINE menu.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-9
1xEV-DO Forward Link Measurements
PhaseErr Display. When you select Mainview Content from the VIEW DEFINE
menu and then select PhaseErr from the Mainview Content submenu, changes of
phase error over time are displayed for each chip or symbol (see Figure 2-6).
Symbol number
Horizontal Start
Code length and channel number
Vertical Scale
Horizontal Scale
Figure 2-6: PhaseErr display
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis automatically
to display the entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis (number of chips or
symbols).
Horizontal Start: Sets the chip number or symbol number of the first (left)
value of the horizontal axis.
Vertical Scale: Sets the scale of the vertical axis.
Vertical Offset: Sets the offset value of the vertical axis. Y ou can set the value
from -450 to 450 degrees.
Full Scale: Sets the scale of vertical axis to the default full-scale value.
Measurement Content...: Selects the display content in the main view. You
can select EVM, MagErr, or PhaseErr. This selection can also be made from
Mainview Content in the VIEW DEFINE menu.
Symbol Table Display. When you select Mainview Content from the VIEW
DEFINE menu and then select Symbol Table from the Mainview Content
2-10WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Forward Link Measurements
submenu, the symbol table is displayed (see Figure 2-7). This display is only
available when the Measurement Level menu item is set to Symbol.
Code length and channel number
Symbol number
Channel type
Figure 2-7: Symbol table display
You can set the radix for the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Radix...: Sets the radix for displaying the table. You can select Hex
(hexadecimal), Oct (octal), or Bin (binary).
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-11
1xEV-DO Forward Link Measurements
Code Domain Power Measurement
The code domain power measurement measures the distribution of signal power
across the set of code channels, normalized to the total signal power. This
measurement allows you to verify that each code channel is operating at its proper
level. Figure 2-8 shows an example of the code domain power measurement.
Figure 2-8: Code domain power measurement
Display Elements
2-12WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
The following information is shown in the code domain power measurement
display:
Overview: This view can contain power versus time or spectrogram.
Subview: This view can contain spectrum, EVM, magnitude error, phase
error, IQ power graph, and constellation .
Main view: This view can contain code domain power , power codogram, and
IQ power graph.
The display contents in each view can be changed using the VIEW DEFINE menu.
Refer to Changing the V iew Co ntents on page 2-14 for more information about the
VIEW DEFINE menu.
1xEV-DO Forward Link Measurements
Setting the Timing
Parameters
You can set the following timing parameters using the TIMING menu. Press the
TIMING key to open the TIMING menu.
Acquisition Length (chips): Sets the acquisition length in chips. The range
depends on the acquisition memory size and the span setting.
Acquisition Length (s): Displays the acquisition length in seconds.
Acquisition History: Specifies the number of the block to display and
analyze. The latest block is number zero. Older blocks have larger negative
numbers.
Analysis Interval: Sets the analysis interval in half slots. The range depends
on the acquisition length setting.
Analysis Offset: Sets the start point of the analysis with respect to the left end
of the acquisition length in half slots.
Spectrum Length: Display the time length for FFT processing of the spectrum
displayed in the subview. This value is equivalent to one frame acquisition
length.
Spectrum Offset: Sets the beginning of Spectrum Length with respect to the
left end of the acquisition length.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for detailed information about the timing parameters.
Setting the Measurement
Parameters
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Analyze: Performs analysis for the time slots in the analysis range.
Measurement Level: Selects the measurement level for the measurement.
Y o u can select Chip (chip level) or Symbol (symbol level). This setting is only
available when Mainview Content in the VIEW DEFINE menu is set to IQ
Power Graph.
Channel Type...: Selects the channel type to be measured. You can select
MAC, Pilot, Data, or Preamble.
PN Offset: Sets the PN of fset in units of 64 chips. You can set the value from
0 to 511.
Select HalfSlot: Sets the half slot for the measurement.
Select Code: Sets the code in the half slot for the measurement.
Active Channel Threshold: Sets the active channel threshold level (in dB
from the pilot) used for deciding whether a code channel is active or inactive.
You can set the value from -100 dB to 0 dB.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-13
1xEV-DO Forward Link Measurements
Measurement Filter...: Selects the measurement filter to apply when
calculating code domain power results. You can select None, cdma2000, or
cdma2000+EQ (equalizer).
IQ Swap: Sets whether to swap the I and Q data streams before demodulation.
Limits...: Sets the pass/fail limits for the code domain power measurement.
When pressing this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-55 for more information.
Changing the View
Contents
You can change the contents in the overview, subview, and main view using the
VIEW DEFINE menu. Press the VIEW: DEFINE key to display the VIEW
DEFINE menu.
Show Views: Selects the view style on the screen. You can sele ct Single or
Multi.
Overview Content...: Selects a view to display in the overview. You can
select Spectrogram or Waveform (power versus time).
Subview Content...: Selects a view to display in the subview:
Spectrum: Displays spectrum of the input signal.
EVM: Displays changes of EVM (Error Vector Magnitude) over time.
MagErr: Displays changes of magnitude error over time.
PhaseErr: Displays changes of phase error over time.
IQ Power Graph: Displays changes I and Q powers over time. Refer to
IQ Power Graph Display on page 2-19.
Constellation: Displays the signal as an I-Q constellation.
Mainview Content...: Selects a view to display in the main view. You can
select Code Domain Power, Power Codogram, or IQ Power Graph. Refer to
Scale and Format in the Main View on page 2-15 for more information about
the views.
Code Order...: Sets the way that code channels are arranged on the display.
You can select Hada mard or BitReverse.
Menu Off: Hides the side menu. T o display the menu again, press the MENU
side key or VIEW: DEFINE key.
2-14WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Forward Link Measurements
Scale and Format in the
Main View
Code length and channel number
Marker readout
Vertical Stop
This subsection describes the scale settings and display format in the main view.
Code Domain Power Display. When you select Mainview Content from the VIEW
DEFINE menu and then select Code Domain Power from the Mainview Content
submenu, the code domain power for code channels is displayed (see Figure 2-9).
active, inactive, or pilot display
Channel type
Code domain power
Vertical Scale
Horizontal Scale
Horizontal Start
Figure 2-9: Code domain power display
In the code domain power display, the I and Q power bars are distinguished by
using different colors as follows:
Blue: pilot channel
Red: active channel
Yellow: inactive channel
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-15
1xEV-DO Forward Link Measurements
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis automatically
to display the entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis. The range is depe ndent
on the Channel Type setting.
Horizontal Start: Sets the channel number of the first (left) value of the
horizontal axis.
Vertical Scale: Sets the scale of the vertical axis. You can set the value from
100
Vertical Stop: Sets the maximum (top) value of the vertical axis. You can set
the value from -100 dB to 100 dB.
Full Scale: Sets the scale of the vertical axis to the default full-scale value.
Y Axis...: Selects whether to represent the vertical (amplitude) axis with
relative values or absolute values. When you select Relative, the vertical axis
represents the power relative to the total power of all channels. When you
select Absolute, the vertical axis represents the absolute power of each
channel.
µdB to 100 dB.
Graph Number: Selects the number of graphs to be displayed in the screen.
You can select 1 or 2.
View Data...: Sets which channels to display when 1 is selected in the Graph
Number menu item. You can select I, Q, or IandQ.
2-16WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Forward Link Measurements
Power Codogram Display. When you select Mainview Content from the VIEW
DEFINE menu and then select Power Codogram from the Mainview Content
submenu, the code domain power is displayed in spectrogram (see Figure 2-10).
Code length and channel number
Marker readout
Color Scale
Vertical Size
Vertical Start
active, inactive, or pilot display
Channel type
Code domain power
Half slot number
Relative time from completion of data acquisition
Horizontal Scale
Horizontal Start
Figure 2-10: Power codogram display
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis to display the
entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis. The range is depe ndent
on the Channel Type setting.
Horizontal Start: Sets the channel number of the first (left) value of the
horizontal axis.
Vertical Size: Sets the scale of the vertical axis.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-17
1xEV-DO Forward Link Measurements
Vertical Start: Sets the frame value at the bottom of the vertical axis.
Color Scale: Sets the scale (the value separating the minimum power value
from the maximum power value) of the color axis. The choices are 5, 10, 20,
and 50 dB.
Color Stop: Sets the stop value of the color axis.
Full Scale: Sets the maximum value of the color axis to the reference level.
Y Axis...: Selects whether to represent the Y (color) axis with relative values
or absolute values. When you select Relative, the Y axis represents the power
relative to the total power of all channels. When you select Absolute, the Y axis
represents the absolute power of each channel.
Graph Number: Selects the number of graphs to be displayed in the screen.
You can select 1 or 2.
View Data...: Sets which channels to display when 1 is selected in the Graph
Number menu item. You can select I, Q, or IandQ.
2-18WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Forward Link Measurements
IQ Power Graph Display. When you select Mainview Content from the VIEW
DEFINE menu and then select IQ Power Graph from the Mainview Content
submenu, I and Q powers over time are displayed for each chip or symbol (see
Figure 2-11).
Marker readout
Vertical Stop
Vertical Scale
Symbol number
Code length and channel number
Horizontal Scale
Horizontal Start
Figure 2-11: IQ power graph display
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis automatically
to display the entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis (number of chips or
symbols).
Horizontal Start: Sets the start chip or symbol number of the horizontal ax is.
Vertical Scale: Sets the scale of the vertical axis. You can set the value from
µdB to 100 dB.
100
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-19
1xEV-DO Forward Link Measurements
Vertical Stop: Sets the stop value of the vertical axis. You can set the value
from -100 dB to 100 dB.
Full Scale: Sets the scale of the vertical axis to the default full scale value.
Y Axis...: Selects whether to represent the vertical (amplitude) axis with
relative values or absolute values. When you select Relative, the vertical axis
represents the power relative to the total power of all channels. When you
select Absolute, the vertical axis represents the absolute power of each
channel.
Graph Number: Selects the number of graphs to be displayed in the screen.
You can select 1 or 2.
View Data...: Sets which channels to display when 1 is selected in the Graph
Number menu item. You can select I, Q, or IandQ.
2-20WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Channel Power Measurement
The channel power measurement measures the channel power within a specified
bandwidth and the power spectral density in dBm/Hz. Figure 2-12 shows an
example of the channel power measurement.
1xEV-DO Forward Link Measurements
Figure 2-12: Channel power measurement
Setting the Measurement
Parameters
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-21
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Channel Bandwidth: Sets the frequency range for the measurement.
Measurement Filter Shape: Sets the filter to be used for the measurement.
You can select Rect (Rectangular), Gaussian, Nyquist, or Root Nyquist.
Rolloff Ratio: Enters the rolloff rati o when the Nyquist or Root Nyquist filter
is selected. You can set the value from 0.0001 to 1. The default value is 0.5.
Limits...: Sets the pass/fail limit for the channel power measurement. When
pressing this side key , the measurement limits edi tor appears. Refer to Editing the Measurement Limits on page 2-55 for more information.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for information about the scale settings for the display.
1xEV-DO Forward Link Measurements
OBW Measurement
The OBW (Occupied Bandwidth) measurement measures the frequency
bandwidth, using the ratio you specify for carrier signal power/power within the
span setting. Figure 2-13 shows an example of the OBW measurement.
Figure 2-13: OBW measurement
Setting the Measurement
Parameters
2-22WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Power Ratio: Specifies the power ratio of the carrier and span regions for
calculating OBW. You can set the value from 80 to 99.99%. The default value
is 99%.
Limits...: Sets the pass/fail limits for the OBW measurement. When pressing
this side key, the measurement limits editor appears. Refer to Editing the Measurement Limits on page 2-55 for more information.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for information about the scale settings for the display.
ACPR Measurement
1xEV-DO Forward Link Measurements
The ACPR (Adjacent Channel Power Ratio) measurement measures the ratio of
carrier signal power to the signal power in channels specified by limits. Figure 2-14
shows an example of the ACPR measurement.
Figure 2-14: ACPR measurement
Setting the Measurement
Parameters
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-23
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Main Channel Bandwidth: Sets the bandwidth of the main channel.
Measurement Filter Shape...: S ets the filter to be used for the measurement.
You can select Rect (Rectangular), Gaussian, Nyquist, or Root Nyquist.
Scroll Table: Scrolls the table displayed in the view.
Limits: Sets the pass/fail limit for the ACPR measurement. When pressing this
side key, the measurement limits editor appears. Refer to Editing the
Measurement Limits on page 2-55 for more information.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for information about the scale settings for the display.
1xEV-DO Forward Link Measurements
Spectrum Emission Mask Measurement
The spectrum emission mask measurement verifies that the base station is not
transmitting excessive power outside of its designated channel. Since the Option
26 provides the pre-defined measurement limits for each band class, you can
perform pass/fail evaluations easily . Figure 2-15 shows an example of the spectrum
emission mask measurement.
Figure 2-15: Spectrum emission mask measurement
NOTE. When performing this measurement, be sure to apply a continuous active
slot signal or a continuous idle slot signal.
Setting the Measurement
Parameters
2-24WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Slot Type: Selects the slot type to be measured. You can select Active or Idle.
For Active, the total power of the Pilot, MAC, and Data channels is measured.
For Idle, the burst power of the Pilot and MAC channels is measured.
The displayed menu items change depending on which slot type is selected.
1xEV-DO Forward Link Measurements
When Active is selected:
Measurement...: Sets the limit table used for limit testing. You can select
Offset From Channel or Inband Spurious. For Offset From Channel, frequen cy
zones are specified by the difference from the center frequency. For Inband
Spurious, frequency zones are specified by the absolute frequency values.
Ref. Channel Select: Selects the reference mode used to measure the spectrum
emission level. You can select Auto or Man (manual). For Auto, the reference
channel level is measured from the input signal for the specified channel
bandwidth. For Man, you can set the reference channel level in the Ref.
Channel Level menu item.
Ref. Channel Level: Sets the reference channel level used to measure the
spectrum emission level. Y ou can set the value from -150 dBm to 30 dBm. This
setting is only available when Ref. Channel Select is set to Man (manual).
Channel Bandwidth: Sets the channel bandwidth for the measurement.
Measurement Filter Shape...: S ets the filter to be used for the measurement.
You can selec t Rect (Rectangular), Gaussian, Nyquist, or Root Nyquist. This
setting is only available when Ref. Channel Select is set to Auto.
Rolloff Ratio: Enters the rolloff ratio when the Nyquist or Root Nyquist filter
is selected. You can set the value from 0.0001 to 1. The default value is 0.5.
This setting is only available when Ref. Channel Select is set to Auto.
Limits...: Sets the pass/fail limits for the spectrum emission mask
measurement. When pressing this side key, the measurement limits editor
appears. Refer to Editing the Measurement Limits on page 2-55 for more
information.
Scroll Table: Scrolls the table displayed in the view.
When Idle is selected:
NOTE. In this measurement, you cannot edit a frequency mask for trigger.
Measurement...: Sets the limit table used for limit testing. You can select
Offset From Channel or Inband Spurious. For Offset From Channel, frequen cy
zones are specified by the difference from the center frequency. For Inband
Spurious, frequency zones are specified by the absolute frequency values.
Gate Length: Sets the gate length to be measured. You can set the value from
180 µs to 840 µs.
Burst Sync...: Sets the burst point to be measured. Y ou can select Rising Edge,
Mid Point, or Trigger Position. This setting is only available when Slot Type
is set to Idle.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-25
1xEV-DO Forward Link Measurements
Ref. Channel Select: Selects the reference mode used to measure the spectrum
emission level. You can select Auto or Man (manual). For Auto, the reference
channel level is measured from the input signal for the specified channel
bandwidth. For Man, you can set the reference level in the Ref. Channel Level
menu item.
Ref. Channel Level: Sets the reference channel level used to measure the
spectrum emission level. Y ou can set the value from -150 dBm to 30 dBm. This
setting is only available when Ref. Channel Select is set to Man (manual).
Analyze: Performs analysis for the time slots in the analysis range.
Limits...: Sets the pass/fail limits for the spectrum emission mask
measurement. When pressing this side key, the measurement limits editor
appears. Refer to Editing the Measurement Limits on page 2-55 for more
information.
Scroll Table: Scrolls the table displayed in the view.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for information about the scale settings for the display.
Setting the Timing
Parameters
Display Elements
Changing the View
Contents
When Idle is selected as the slot type, you can set the following timing parameter
using the TIMING menu. Press the TIMING key to open the TIMING menu.
Acquisition History: Specifies the block number to be analyzed. Block
number “0” corresponds to the latest block.
When Idle is selected as the slot type, the following information is shown in the
spectrum emission measurement display:
Overview: This view can contain power versus time or spectrogram.
Main view: This view can contain spectrum.
The display content in the overview can be changed using the VIEW DEFINE
menu. Refer to the next subsection for more information about the VIEW DEFINE
menu.
When Idle is selected as the slot type, you can change the contents in the overview
using the VIEW DEFINE menu. Press the VIEW: DEFINE key to display the
VIEW DEFINE menu.
Show V iews: Sets the view style on the screen. You can select Single or Multi.
Overview Content...: Selects a view to display in the overview. You can
select Spectrogram or Waveform (spectrum).
Menu Off: Hides the side menu. T o display the menu again, press the MENU
side key or VIEW: DEFINE key.
2-26WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Gated Output Power Measurement
The Gated Output power measurement measures the total RF power in a selected
channel. Figure 2-16 shows an example of the gated output power measurement.
1xEV-DO Forward Link Measurements
Display Elements
Setting the Timing
Parameters
Figure 2-16: Gated output power measurement
The following information is shown in the gated output power measurement
display:
Overview: This view can contain power versus time or spectrogram.
Subview: This view can contain spectrum.
Main view: This view can contain power versus time.
The display content in the overview can be changed using the VIEW DEFINE
menu. Refer to Changing the View Contents on page 2-29 for more information
about the VIEW DEFINE menu.
You can set the following timing parameter using the TIMING menu. Press the
TIMING key to open the TIMING menu.
Acquisition History: Specifies the block number to be analyzed. Block
number “0” corresponds to the latest block.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-27
1xEV-DO Forward Link Measurements
Setting the Measurement
Parameters
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
In the MEAS SETUP menu, you can set the following parameters:
Analyze: Performs analysis for the time slots in the analysis range.
Slot Type: Selects the slot type to be measured. You can select Active or Idle.
For Active, the total power of the Pilot, MAC, and Data channels is measured.
For Idle, the burst power of the Pilot and MAC channels is measured.
NOTE. When you select Idle, the trigger souse need to be set to Level. For
information about setting the trigger souse, refer to the WCA230A & WCA2 80 A
Portable Wirele s s Comm unication Analyzers User Manual.
Burst Sync...: Sets the burst point to be measured. Y ou can select Rising Edge,
Mid Point, or Trigger Position. This setting is only available when Idle is
selected as the slot type.
Burst Offset: Sets the burst offset between the trigger position and the burst
position for the measurement. You can set the value from -1 ms to 1 ms. This
setting is only available when Burst Sync is set to Trigger Position.
Ref. Channel Select: Selects the reference mode used to measure the power
level. You can select Auto or Man (manual). For Auto, the reference channel
level is measured from the input signal. For Man, you can set the reference
channel level in the Ref. Channel Level menu item.
Ref. Channel Level: Sets the reference channel level used to measure the
power level. You can set the value from -150 dBm to 30 dBm. This setting is
only available when Ref.Channel Select is set to Man (manual).
Limits...: Sets the pass/fail limits for the gated output power measurement.
When pressing this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-55 for more information.
2-28WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Forward Link Measurements
Changing the View
Contents
Scale in the Main View
You can change the contents in the overview using the VIEW DEFINE menu.
Press the VIEW: DEFINE key to display the VIEW DEFINE menu.
Show V iews: Sets the view style on the screen. You can select Single or Multi.
Overview Content...: Selects a view to display in the overview. You can
select Spectrogram or Waveform (power versus time).
Menu Off: Hides the side menu. T o display the menu again, press the MENU
side key or VIEW: DEFINE key.
You can set the scale of the main view using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis to display the
entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis.
Horizontal Start: Sets the minimum (left) value of the horizontal axis.
Vertical Scale: Sets the scale of the vertical axis.
Vertical Stop: Sets the maximum (top) value of the vertical axis.
Full Scale: Sets the scale of the vertical axis to the default full scale value.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-29
1xEV-DO Forward Link Measurements
Intermodulation Measurement
The intermodulation measurement measures the third-order and fifth-order
harmonic distortion components of a modulated signal. Figure 2-17 shows an
example of the intermodulation measurement.
Figure 2-17: Intermodulation measurement
Setting the Measurement
Parameters
2-30WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
2nd Channel Offset: Sets the center frequency of the second channel where
the interfering carrier exists.
Main Channel Integration BW: Sets the main channel integration
bandwidth. You can set the value from 500 kHz to 5 MHz.
Measurement Filter Shape...: S ets the filter to be used for the measurement.
You can select Rect (Rectangular), Gaussian, Nyquist, or Root Nyquist.
Rolloff Ratio: Enters the rolloff ratio when the Nyquist or Root Nyquist filter
is selected. You can set the value from 0.0001 to 1. The default value is 0.5.
CCDF Measurement
1xEV-DO Forward Link Measurements
Limits...: Sets the pass/fail limits for the intermodulation measurement. Wh en
pressing this side key , the measurement limits edi tor appears. Refer to Editing the Measurement Limits on page 2-55 for more information.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for information about the scale settings for the display.
The CCDF (Complementary Cumulative Distribution Function) measurement
displays the peak-to-average power ratio along the horizontal axis, and the
probability that the ratio is exceeded along the vertical axis. This display is useful
in designing digital communications systems. Figure 2-18 shows an example of the
CCDF measurement.
Figure 2-18: CCDF measurement (single view)
Setting the Timing
Parameters
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-31
You can set the following timing parameters using the TIMING menu. Press the
TIMING key to open the TIMING menu.
Acquisition Length (s): Sets the acquisition length in seconds.
1xEV-DO Forward Link Measurements
Acquisition History: Specifies the number of the block to display and
analyze. The latest block is number zero. Older blocks have larger negative
numbers.
Spectrum Length: Display the time length for FFT processing of the spectrum
displayed in the subview. This value is equivalent to one frame acquisition
length.
Spectrum Offset: Sets the beginning of Spectrum Length with respect to the
left end of the acquisition length.
Output Trigger Indicator: Selects whether to enable the output trigger
indicator.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for detailed information about the time parameters.
Setting the Measurement
Parameters
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Display Gaussian Line: Selects whether to display the Gaussian line on the
graticule.
Display Reference Line: Selects whether to display the most recently stored
reference line on the graticule.
Store Reference Line: Stores a new reference line.
Reset Measurement: Restart the CCDF measurement. When you press this
key, the CCDF accumulation counter on the upper right side of the display is
reset to 0.
CCDF Auto-Scaling: Selects whether to automatically set the scaling of the
horizontal axis. When you set it to On, the signal peak value is displayed as the
maximum value on the right edge of the graticule. When you set it to Off, the
scaling of the horizontal axis can be set manually with CCDF Scale. The
default value is Off.
CCDF Scale: Sets the full-scale value of the horizontal axis of the CCDF
display when CCDF Auto-Scaling is set to Off. Y ou can set the value from 1dB
to 100 dB.
Threshold: Sets the threshold which defines the samples to be included in the
CCDF calculation. You can set the value from -250 dBm to 130 dBm.
Limits...: When pressing this side key, the measurement limits editor appears.
Refer to Editing the Measurement Limits on page 2-55 for more information.
2-32WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Forward Link Measurements
Changing the View
Contents
Scale in the Main View
You can change the contents in the overview using the VIEW DEFINE menu.
Press the VIEW: DEFINE key to display the VIEW DEFINE menu.
Show V iews: Sets the view style on the screen. You can select Single or Multi.
When you set it to Multi, the CCDF, spectrum, and power versus time of the
measured signal are displayed simultaneously.
Overview Content...: Selects a view to display in the overview. You can
select Spectrogram or Waveform (power versus time).
Menu Off: Hides the side menu. T o display the menu again, press the MENU
side key or VIEW: DEFINE key.
You can set the scale in the main vie w using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis automatically
to display the entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis.
Horizontal Start: Sets the minimum (left) value of the horizontal axis.
Vertical Stop: Sets the maximum (top) the vertical axis. The setting ranges are
twice the Vertical Start value to 100% in a 1-2-5 sequence.
Vertical Stop
Vertical Start
Vertical Start: Sets the minimum (bottom) value of the vertical axis. The
setting ranges are 10
Full Scale: Sets the scale of the vertical axis to the default full scale value.
Sub Grid: Sets whether to display the sub-grid on the graticule.
Horizontal Start
-5
to half the Vertical Stop value in a 1-2-5 sequence.
Horizontal Scale
Figure 2-19: Scale settings in the CCDF display
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-33
1xEV-DO Forward Link Measurements
Pilot to Code Channel Measurement
The pilot to code channel measurement measures the time difference between the
pilot channel and other code channels detected in the received signal. Figure 2-20
shows an example of the pilot to code channel measurement.
Figure 2-20: Pilot to code channel measurement
Display Elements
2-34WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
The following information is shown in the pilot to code channel measurement
display:
Overview: This view can contain power versus time or spectrogram.
Subview: This view can contain spectrum, EVM, magnitude error, phase
error, constellation.
Main view: This view lists the following measurement results for the active
channels:
Power level
Timing referred to the pilot channel
Phase referred to the pilot channel
Code domain error
1xEV-DO Forward Link Measurements
The display content in the subview can be changed using the VIEW DEFINE
menu. Refer to Changing the View Contents on page 2-36 for more information
about the VIEW DEFINE menu.
Setting the Timing
Parameters
You can set the following timing parameters using the TIMING menu. Press the
TIMING key to open the TIMING menu.
Acquisition Length (chips): Sets the acquisition length in chips. The range
depends on the acquisition memory size and the span setting.
Acquisition Length (s): Displays the acquisition length in seconds.
Acquisition History: Specifies the number of the block to display and
analyze. The latest block is number zero. Older blocks have larger negative
numbers.
Analysis Interval: Sets the analysis interval in half slots. The range depends
on the acquisition length setting.
Analysis Offset: Sets the start point of the analysis with respect to the left end
of the acquisition length in half slots.
Spectrum Length: Display the time length for FFT processing of the spectrum
displayed in the subview. This value is equivalent to one frame acquisition
length.
Spectrum Offset: Sets the beginning of Spectrum Length with respect to the
left end of the acquisition length.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for detailed information about the time parameters.
Setting the Measurement
Parameters
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Analyze: Performs analysis for the time slots in the analysis range.
Channel Type...: Select the channel type to be measured. You can select
MAC, Data, or Preamble.
PN Offset: Sets the PN of fset in units of 64 chips. You can set the value from
0 to 511.
Select HalfSlot: Sets the half slot for the measurement.
Scroll Table: Scrolls thetable displayed in the view.
Active Channel Threshold: Sets the active channel threshold level (in dB
from the pilot) used for deciding whether a code channel is active or inactive.
You can set the value from -100 dB to 0 dB.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-35
1xEV-DO Forward Link Measurements
Measurement Filter...: Selects the measurement filter to apply when
calculating pilot to code channel results. You can select None, cdma2000, or
cdma2000+EQ (equalizer).
IQ Swap: Sets whether to swap the I and Q data streams before demodulation.
Limits...: Sets the pass/fail limits for the pilot to code channel measurement.
When pressing this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-55 for more information.
Changing the View
Contents
You can change the contents in the overview and subview using the VIEW
DEFINE menu. Press the DEFINE key to display the VIEW DEFINE menu.
Overview Content...: Selects a view to display in the overview. You can
select Spectrogram or Waveform (power versus time).
Subview Content...: Selects a view to display in the subview:
Spectrum: Displays spectrum of the input signal.
EVM: Displays changes of EVM (Error Vector Magnitude) in symbols.
MagErr: Displays changes of magnitude error in symbols.
PhaseErr: Displays changes of phase error in symbols.
Constellation: Displays the signal as an I-Q constellation.
2-36WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Reverse Link Measurements
This section describes the functions and features of the 1xEV-DO reverse link
measurements. Each measurement description contains general information about
the measurement, descriptions of the measurement displays and functions available
through menu selections.
The information is divided into the following subsections:
Modulation accuracy measurement
Code domain power measurement
Spectrum emission mask measurement
Pilot to code Channel measurement
The following measurement items available in the 1xEVDO reverse link
measurements are the same as those in the 1xEV-DO forward link measurements.
Refer to 1xEV-DO Forward Link Measurements beginning on page 2-3.
NOTE. If you are not familiar with the operation of the WCA230A/WCA280A, r efer
to the WCA230A & WCA280A Portable Wireless Communication Analyzers User
Manual before reading this section.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-37
1xEV-DO Reverse Link Measurements
Modulation Accuracy Measurement
The modulation accuracy measurement measures Rho (ration of the correlated
power to the total power), EVM (Error Vector Magnitude), magnitude error, phase
error, frequency error, and origin offset. Figure 2-21 shows an example of the
modulation accuracy measurement.
Figure 2-21: Modulation accuracy measurement-reverse link
Display Elements
2-38WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
The following information is shown in the modulation accuracy measurement
display:
Overview: This view can contain power versus time or spectrogram.
Subview: This view can contain spectrum, EVM, magnitude error, phase
error, IQ power graph, and constellation.
Main view: This view can contain modulation accuracy, EVM, magnitude
error, phase error, and symbol table.
The display contents in each view can be changed using the VIEW DEFINE menu.
Refer to Changing the V iew Contents on page 2-40 for more information about the
VIEW DEFINE menu.
1xEV-DO Reverse Link Measurements
Setting Timing Parameters
You can set the following timing parameters using the TIMING menu. Press the
TIMING key to open the TIMING menu.
Acquisition Length (chips): Sets the acquisition length in chips. The setting
range depends on the acquisition memory size and the span setting.
Acquisition Length (s): Displays the acquisition length in seconds.
Acquisition History: Specifies the number of the block to display and
analyze. The latest block is number zero. Older blocks have larger negative
numbers.
Analysis Interval: Sets the analysis interval in half slots. The setting range
depends on the acquisition length setting.
Analysis Offset: Sets the start point of the analysis with respect to the left end
of the acquisition length in half slots.
Spectrum Length: Display the time length for FFT processing of the spectrum
displayed in the subview. This value is equivalent to one frame acquisition
length.
Spectrum Offset: Sets the beginning of Spectrum Length with respect to the
left end of the acquisition length.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for detailed information about the timing parameters.
Setting Measurement
Parameters
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Analyze: Performs analysis for the time slots in the analysis range.
Measurement Level: Selects the measurement level for the measurement.
You can select Chip (chip level) or Symbol (symbol level).
Select HalfSlot: Sets the half slot for the measurement.
Select Code: Sets the code in the half slot for the measurement. This setting is
only available when Measurement Level is set to Symbol.
Longcode Mask I: Sets the long code mask value for the I signal. You can set
the value from 0 to 3FFFFFFFFFF in the hexadecimal format.
Longcode Mask Q: Sets the long code mask value for the Q signal. You can
set the value from 0 to 3FFFFFFFFFF in the hexadecimal format.
Active Channel Threshold: Sets the active channel threshold level (in dB
from the pilot) used for deciding whether a code channel is active or inactive.
You can set the value from -100 dB to 0 dB.
Measurement Filter...: Selects the measurement filter to apply when
calculating EVM and other modulation accuracy results. Y ou can select None,
cdma2000, or cdma2000+EQ (equalizer).
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-39
1xEV-DO Reverse Link Measurements
IQ Swap: Sets whether to swap the I and Q data streams before demodulation.
Limits...: Sets the pass/fail limits for the modulation accuracy measurement.
When pressing this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-55 for more information.
Changing the View
Contents
You can change the view contents in the overview, subview, and main view using
the VIEW DEFINE menu. Press the VIEW: DEFINE key to display the VIEW
DEFINE menu.
Show Views: Selects the view style on the screen. You can sele ct Single or
Multi.
Overview Content...: Selects a view to display in the overview. You can
select Spectrogram or Waveform (power versus time).
Subview Content...: Selects a view to display in the subview:
Spectrum: Displays spectrum of the measured signal.
EVM: Displays changes of EVM (Error Vector Magnitude) over time.
MagErr: Displays changes of magnitude error over time.
PhaseErr: Displays changes of phase error over time.
IQ Power Graph: Displays changes of I and Q powers over time. Refer
to IQ Power Graph Display on page 2-19.
Constellation: Displays the signal as an I-Q constellation.
Mainview Content...: Selects a view to display in the main view. You can
select Modulation Accuracy, EVM, MagErr , PhaseErr , or Symbol T able. Refer
to Scale and Format in the Main V iew on page 2-41 for more information about
the views.
Menu Off: Hides the side menu. T o display the menu again, press the MENU
side key or VIEW: DEFINE key.
2-40WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Reverse Link Measurements
Scale and Format in the
Main View
1: second half slot
ACK or NACK indicator
This subsection describes the scale settings and display format in the main view.
Modulation Accuracy Display. When you select Mainview Content from the VIEW
DEFINE menu and then select Modulation Accuracy from the Mainview Content
submenu, an IQ rectangular graph and the measured value for Rho, peak code
domain error, rms and peak EVM, magnitude error, phase error, frequency error,
and IQ origin offset (see Figure 2-22). The peak code domain error is displayed
only when the Measurement Level menu item is set to Symbol.
Half slot number
0: first half slot
DRC code value
IQ rectangular graph
(vector display)
DRC value
Figure 2-22: Modulation accuracy display-reverse link
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Measurement Content...: Selects vector or constellation display.
Vector: Selects vector display . A signal represented with phase and amplitude
is displayed in rectangular (I and Q) coordinates. The red point indicates the
symbol position on the measured signal, and the yellow trace indicates the
locus of signal between symbols.
Constellation: Selects constellation display. It is the same as the vector
display, except that only symbols of the measured signal are indicated in red,
and the locus between symbols is not shown. The cross marks indicate symbol
positions of an ideal signal.
NOTE. I and Q signals are normalized to prevent the scale from changing when
signal attenuation changes.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-41
1xEV-DO Reverse Link Measurements
EVM Display. When you select Mainview Content from the VIEW DEFINE menu
and then select EVM from the Mainview Content submenu, changes of EVM
(Error Vector Magnitude) over time are displayed for each chip or symbol
(see Figure 2-23).
Chip number
Vertical Scale
Vertical Start
Horizontal Scale
Horizontal Start
Figure 2-23: EVM display-reverse link
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis to display the
entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis (number of chips or
symbols).
Horizontal Start: Sets the chip number or symbol number of the first (left)
value of the horizontal axis.
Vertical Scale: Sets the scale of the vertical axis.
Vertical Start: Sets the minimum (bottom) value of the vertical axis.
Full Scale: Sets the scale of vertical axis to the default full-scale value.
Measurement Content...: Selects the display content in the main view. You
can select EVM, MagError, or PhaseError. This selection can also be made
from Mainview Content in the VIEW DEFINE menu.
2-42WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Reverse Link Measurements
MagErr Display. When you select Mainview Content from the VIEW DEFINE
menu and then select MagErr from the Mainview Content submenu, changes of
magnitude error over time are displayed for each chip or symbol (see
Figure 2-24).
Chip number
Vertical Scale
Horizontal Scale
Horizontal Start
Figure 2-24: MagErr display-reverse link
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis automatically
to display the entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis (number of chips or
symbols).
Horizontal Start: Sets the chip number or symbol number of the first (left)
value of the horizontal axis.
Vertical Scale: Sets the scale of the vertical axis.
Vertical Offset: Sets the offset value of the vertical axis. Y ou can set the value
from -200% to 200%.
Full Scale: Sets the scale of vertical axis to the default full-scale value.
Measurement Content...: Selects the display content in the main view. You
can select EVM, MagError, or PhaseError. This selection can also be made
from Mainview Content in the VIEW DEFINE menu.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-43
1xEV-DO Reverse Link Measurements
PhaseErr Display. When you select Mainview Content from the VIEW DEFINE
menu and then select PhaseErr from the Mainview Content submenu, changes of
phase error over time are displayed for each chip or symbol (see Figure 2-25).
Chip number
Vertical Scale
Horizontal Scale
Horizontal Start
Figure 2-25: PhaseErr display-reverse link
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis to display the
entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis (number of chips or
symbols).
Horizontal Start: Sets the chip number or symbol number of the first (left)
value of the horizontal axis.
Vertical Scale: Sets the scale of the vertical axis.
Vertical Offset: Sets the offset value of the vertical axis. Y ou can set the value
from -450 to 450 degrees.
Full Scale: Sets the scale of vertical axis to the default full-scale value.
Measurement Content...: Selects the display content in the main view. You
can select EVM, MagError, or PhaseError. This selection can also be made
from Mainview Content in the VIEW DEFINE menu.
2-44WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Reverse Link Measurements
Symbol Table Display. When you select Mainview Content from the VIEW
DEFINE menu and then select Symbol Table from the Mainview Content
submenu, the symbol table is displayed (see Figure 2-26). This display is only
available when the Measurement Level menu item is set to Symbol.
Symbol number
Code length and Channel number
Figure 2-26: Symbol table display-reverse link
You can set the radix for the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Radix...: Sets the radix for displaying the table. You can select Hex
(hexadecimal), Oct (octal), or Bin (binary).
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-45
1xEV-DO Reverse Link Measurements
Code Domain Power Measurement
The code domain power measurement measures the distribution of signal power
across the set of code channels, normalized to the total signal power. This
measurement allows you to verify that each code channel is operating at its proper
level. Figure 2-27 shows an example of the code domain power measurement.
Figure 2-27: Code domain power measurement-reverse link
Display Elements
2-46WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
The following information is shown in the code domain power measurement
display:
Overview: This view can contain power versus time or spectrogram.
Subview: This view can contain spectrum, EVM, magnitude error, phase
error, IQ power graph, and constellation .
Main view: This view can contain code domain power , power codogram, and
IQ power graph.
The display contents in each view can be changed using the VIEW DEFINE menu.
Refer to Changing the V iew Co ntents on page 2-48 for more information about the
VIEW DEFINE menu.
1xEV-DO Reverse Link Measurements
Setting Timing Parameters
You can set the following timing parameters using the TIMING menu. Press the
TIMING key to open the TIMING menu.
Acquisition Length (chips): Sets the acquisition length in chips. The setting
range depends on the acquisition memory size and the span setting.
Acquisition Length (s): Displays the acquisition length in seconds.
Acquisition History: Specifies the number of the block to display and
analyze. The latest block is number zero. Older blocks have larger negative
numbers.
Analysis Interval: Sets the analysis interval in half slots. The setting range
depends on the acquisition length setting.
Analysis Offset: Sets the start point of the analysis with respect to the left end
of the acquisition length in half slots.
Spectrum Length: Displays the time length for FFT processing of the
spectrum displayed in the subview. This value is equivalent to one frame
acquisition length.
Spectrum Offset: Sets the beginning of Spectrum Length with respect to the
left end of the acquisition length.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for detailed information about the timing parameters.
Setting Measurement
Parameters
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Analyze: Performs analysis for the time slots in the analysis range.
Measurement Level: Selects the measurement level for the measurement.
Y o u can select Chip (chip level) or Symbol (symbol level). This setting is only
available when Mainview Content in the VIEW DEFINE menu is set to IQ
Power Graph.
Select HalfSlot: Sets the half slot for the measurement.
Select Code: Sets the code in the half slot for the measurement.
Longcode Mask I: Sets the long code mask value for the I signal. You can set
the value from 0 to 3FFFFFFFFFF in the hexadecimal format.
Longcode Mask Q: Sets the long code mask value for the Q signal. You can
set the value from 0 to 3FFFFFFFFFF in the hexadecimal format.
Active Channel Threshold: Sets the active channel threshold level (in dB
from the pilot) used for deciding whether a code channel is active or inactive.
You can set the value from -100 dB to 0 dB
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-47
1xEV-DO Reverse Link Measurements
Measurement Filter...: Selects the measurement filter to apply when
calculating code domain power results. You can select None, cdma2000, or
cdma2000+EQ (equalizer).
IQ Swap: Sets whether to swap the I and Q data streams before demodulation.
Limits...: Sets the pass/fail limits for the code domain power measurement.
When pressing this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-55 for more information.
Changing the View
Contents
You can change the contents in the overview, subview, and main view using the
VIEW DEFINE menu. Press the VIEW: DEFINE key to display the VIEW
DEFINE menu.
Show Views: Selects the view style on the screen. You can sele ct Single or
Multi.
Overview Content...: Selects a view to display in the overview. You can
select Spectrogram or Waveform (power versus time).
Subview Content...: Selects a view to display in the subview:
Spectrum: Displays spectrum of the input signal.
EVM: Displays changes of EVM (Error Vector Magnitude) over time.
MagErr: Displays changes of magnitude error over time.
PhaseErr: Displays changes of phase error over time.
IQ Power Graph: Displays the code domain power for each symbol.
Refer to IQ Power Graph Display on page 2-19.
Constellation: Displays the signal as an I-Q constellation.
Mainview Content...: Selects a view to display in the main view. You can
select Code Domain Power, Power Codogram, or IQ Power Graph. Refer to
Scale and Format in the Main View on page 2-15 for more information about
the views.
Code Order...: Sets the way that code channels are arranged on the display.
You can select Hada mard or BitReverse.
Menu Off: Hides the side menu. T o display the menu again, press the MENU
side key or VIEW: DEFINE key.
2-48WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Spectrum Emission Mask Measurement
The spectrum emission mask measurement verifies that the base station is not
transmitting excessive power outside of its designated channel. Since the Option
26 provides the pre-defined measurement limits for each band class, you can
perform pass/fail evaluations easily. Figure 2-28 shows an example of the spectrum
emission mask measurement.
1xEV-DO Reverse Link Measurements
Figure 2-28: Spectrum emission mask measurement-reverse link
Setting the Measurement
Parameters
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-49
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Measurement...: Sets the limit table used for limit testing. You can select
Offset From Channel or Inband Spurious. For Offset From Channel, frequen cy
zones are specified by the difference from the center frequency. For Inband
Spurious, frequency zones are specified by the absolute frequency values.
Ref. Channel Select: Selects the reference mode used to measure the spectrum
emission level. You can select Auto or Man (manual). For Auto, the reference
channel level is measured from the input signal for the specified channel
bandwidth. For Man, you can set the reference channel level in the Ref.
Channel Level menu item.
1xEV-DO Reverse Link Measurements
Ref. Channel Level: Sets the reference channel level used to measure the
spectrum emission level. Y ou can set the value from -150 dBm to 30 dBm. This
setting is only available when Ref. Channel Select is set to Man (manual).
Channel Bandwidth: Sets the channel bandwidth for the measurement.
Measurement Filter Shape...: S ets the filter to be used for the measurement.
You can selec t Rect (Rectangular), Gaussian, Nyquist, or Root Nyquist. This
setting is only available when Ref. Channel Select is set to Auto.
Rolloff Ratio: Enters the rolloff ratio when the Nyquist or Root Nyquist filter
is selected. You can set the value from 0.0001 to 1. The default value is 0.5.
This setting is only available when Ref. Channel Select is set to Auto.
Limits...: Sets the pass/fail limits for the spectrum emission mask
measurement. When pressing this side key, the measurement limits editor
appears. Refer to Editing the Measurement Limits on page 2-55 for more
information.
Scroll Table: Scrolls the table displayed in the view.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for information about the scale settings for the display.
2-50WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Pilot to Code Channel Measurement
The pilot to code channel measurement measures the time difference between the
pilot channel and other code channels detected in the received signal. Figure 2-29
shows an example of the pilot to code channel measurement.
1xEV-DO Reverse Link Measurements
Figure 2-29: Pilot to code channel measurem ent-reverse link
Display Elements
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-51
The following information is shown in the modulation accuracy measurement
display:
Overview: This view can contain power versus time.
Subview: This view can contain spectrum, EVM, magnitude error, phase
error, constellation.
Main view: This view lists the following measurement results for the active
channels:
Power level
Timing referred to the pilot channel
Phase referred to the pilot channel
Code domain error
1xEV-DO Reverse Link Measurements
The display content in the subview can be changed using the VIEW DEFINE
menu. Refer to Changing the View Contents on page 2-53 for more information
about the VIEW DEFINE menu.
Setting Timing Parameters
You can set the following timing parameters using the TIMING menu. Press the
TIMING key to open the TIMING menu.
Acquisition Length (chips): Sets the acquisition length in chips. The setting
range depends on the acquisition memory size and the span setting.
Acquisition Length (s): Displays the acquisition length in seconds.
Acquisition History: Specifies the number of the block to display and
analyze. The latest block is number zero. Older blocks have larger negative
numbers.
Analysis Interval: Sets the analysis interval in half slots. The setting range
depends on the acquisition length setting.
Analysis Offset: Sets the start point of the analysis with respect to the left end
of the acquisition length in half slots.
Spectrum Length: Display the time length for FFT processing of the spectrum
displayed in the subview. This value is equivalent to one frame acquisition
length.
Spectrum Offset: Sets the beginning of Spectrum Length with respect to the
left end of the acquisition length.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for detailed information about the time parameters.
Setting Measurement
Parameters
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Analyze: Performs analysis for the time slots in the analysis range.
Select HalfSlot: Sets the half slot for the measurement.
Select Code: Sets the code in the half slot for the measurement.
Longcode Mask I: Sets the long code mask value for the I signal. You can set
the value from 0 to 3FFFFFFFFFF in the hexadecimal format.
Longcode Mask Q: Sets the long code mask value for the Q signal. You can
set the value from 0 to 3FFFFFFFFFF in the hexadecimal format.
Active Channel Threshold: Sets the active channel threshold level (in dB
from the pilot) used for deciding whether a code channel is active or inactive.
You can set the value from -100 dB to 0 dB.
2-52WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
1xEV-DO Reverse Link Measurements
Measurement Filter...: Selects the measurement filter to apply when
calculating EVM and other modulation accuracy results. Y ou can select None,
cdma2000, or cdma2000+EQ (equalizer).
IQ Swap: Sets whether to swap the I and Q data streams before demodulation.
Limits...: Sets the pass/fail limits for the pilot to code channel measurement.
When you press this side key , the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-55 for more information.
Changing the View
Contents
You can change the contents in the overview and subview using the VIEW
DEFINE menu. Press the VIEW: DEFINE key to display the VIEW DEFINE
menu.
Overview Content...: Selects a view to display in the overview. You can
select Spectrogram or Waveform (power versus time).
Subview Content...: Selects a view to display in the subview:
Spectrum: Displays spectrum of the input signal.
EVM: Displays changes of EVM (Error Vector Magnitude) over time.
MagErr: Displays changes of magnitude error over time.
PhaseErr: Displays changes of phase error over time.
Constellation: Displays the signal as an I-Q constellation.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-53
1xEV-DO Reverse Link Measurements
2-54WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Editing the Measurement Limits
This section describes how to set measurement limits that can be used to perform
pass/fail testing for the 1xEV-DO measurements.
Refer to Measurement Limit Defaults on page 2-65 for information about the
default settings of each measurement limit.
Using the Measurement Limits Editor
All of the measurement limits are set in the measurement limits editor, which you
access from the Limits... side key on the MEAS SETUP menu.
Figure 2-30 shows the measurement limits editor for the 1xEV-DO forward link
measurements.
Figure 2-30: Measurement limits editor
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-55
Editing the Measurement Limits
Table 2-1 describes all of the measurement limit items available in the
measurement limits editor.
Table 2-1: Measurement limits items
Limit itemDescriptionLower limit rangeUpper limit range
Channel powerSets the lower and upper limits for the Channel
Power measurement.
ACPRSelect this item to access another measurement
limits editor to edit ACPR Limits.
Intermod 3rd OrderSets the upper limit of the third harmonic distortion
component for the Intermodulation measurement.
Intermod 5th OrderSets the upper limit of the fifth harmonic distortion
component for the Intermodulation measurement.
SEM Offset From ChannelSelect this item to access another measurement
limits editor to edit SEM offset from channel limits.
SEM Inband SpuriousSelect this item to access another measurement
limits editor to edit SEM inband spurious limits.
RMS EVMSets the upper limit for the RMS EVM measurement. Not settable0 to 100%
Sets the upper limit for the Peak EVM
Peak EVM
Peak Code Domain ErrorSets the upper limit for the Peak code domain error
RhoSets the lower limit of Rho for the modulation
Pilot To Code TimingSets the upper limit for the pilot to code timing
Pilot To Code PhaseSets the lower and upper limits for the pilot to code
OBWSets the upper and lower limits for the OBW
TauSets the lower limit of Tau for the modulation
Gated Output Power (Idle)
Gated Output Power (Active)
*These items are only available in the 1xEV-DO forward link measurements.
measurement.Not settable0 to 100%
measurement.
accuracy measurement.
measurement.
phase measurement.
measurement.
accuracy measurement.
*
Select this item to access another measurement
limits editor to edit gated output power limits.
*
Select this item to access another measurement
limits editor to edit gated output power limits.
-200 to 200 dBm-200 to 200 dBm
------------------------------------
Not settable-200 to 200 dBc
Not settable-200 to 200 dBc
------------------------------------
------------------------------------
Not settable-200 to 200 dB
0 to 1Not settable
-1 to 1 s-1 to 1 s
-100 to 100 degree-100 to 100 degree
0 to 30 MHz0 to 30 MHz
0 to 1 sNot settable
------------------------------------
------------------------------------
2-56WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Editing the Measurement Limits
Setting a Measurement
Limit
Perform the following procedure to set measurement limits:
1. Press the MEAS SETUP menu key to open the MEAS SETUP menu.
2. Press the Limits... side key to open the measurement limits editor with
LIMITS menu.
3. Press the Select row to edit side key.
4. Turn the rotary knob or press the arrow keys to select the row that you want to
edit.
5. Press the Enable Limit side key to enable or disable the pass/fail testing for
the specified limit(s).
6. Press the Lower Limit side key to set the lower limit for the selected
measurement item, if applicable.
7. Press the Upper Limit side key to set the upper limit for the selected
measurement item.
When you want to set limits for the spectrum emission mask or gated output power
measurement, perform the following steps to open another measurement limits
editor:
1. Press the Select row to edit side key.
2. Turn the rotary knob or press the arrow keys to select ACPR, SEM Offset
From Channel, SEM Inband Spurious, Gated Output Power (Idle), or
Gated Output Power (Active) row.
3. Press the Edit ACPR Limits..., Edit SEM Offset Limits..., Edit SEM
Inband Limits..., Edit Gated Output Power (Idle) Limits..., or Edit Gated
Output Power (Active) Limits... side key. This opens the limits editor to set
more complex limits for the ACPR, spectrum emission mask, or gated output
power measurement. Figure 2-32 shows the measurement limits editor for the
ACPR measurement.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-57
Editing the Measurement Limits
Setting the ACPR Limits
When you select the ACPR row in the measurement limits editor, another
measurement limits editor for the ACPR measurement is displayed. Figure 2-31
shows the measurement limits editor for the ACPR measurement.
Figure 2-31: ACPR measurement limits editor
Table 2-2 lists the measurement limit items that can be set in the measurement
limits editor.
Table 2-2: Measurement limit items for the ACPR measurement
ItemDescriptionLimit ranges
EnableEnables or disables use of the limits in the specified zone (A to L).------------------FrequencySets the frequency offset for the zone.-3 to 3 GHz (WCA230A)
-8 to 8 GHz (WCA280A)
Measurement BWSets the measurement bandwidth for the zone.-3 to 3 GHz (WCA230A)
-8 to 8 GHz (WCA280A)
Limit (Abs)Sets an absolute level limit for the zone.-200 to 200 dBm
Limit (Rel)Sets a relative level limit for the zone.-200 to 200 dBc
2-58WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Editing the Measurement Limits
Table 2-2: Measurement limit items for the ACPR measurement (cont.)
ItemDescriptionLimit ranges
Failure ModeSelects the fail mode to detect fail conditions between the measurement results and
the test limits. The choices are:
Absolute: Fail is detected when the absolute measurement result is larger than
the limit for Limit (Abs).
Relative: Fail is detected when the relative measurement result is larger than the
limit for Limit (Rel).
-------------------
Perform the following steps to set measurement limits in the limits editor:
1. Press the Select column to edit side key.
2. Turn the rotary knob or press the arrow keys to select the column that you want
to edit.
3. Press the Enable side key to enable or disable use of the limits for the zone.
4. Press the side key corresponding to the limit item, and then use the rotary knob
or arrow keys to set the value.
5. Press the Failure Mode... side key to select the failure mode.
6. Press the Default limits to... side key if you want to use a given measurement
limit for the measurement. Refer to Measurement Limit Defaults on page 2-65
for information about the default settings of each measurement limit.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-59
Editing the Measurement Limits
Setting the Spectrum
Emission Mask Limits
When you select the SEM Offset From Channel or SEM Inband Spurious row in
the measurement limits editor, another measurement limits editor for the spectrum
emission mask measurement is displayed. Figure 2-32 shows the measurement
limits editor for the spectrum emission mask measurement.
Table 2-3 lists the measurement limit items that can be set in the measurement
limits editor.
Table 2-3: Measurement limit items for the spectrum emission mask measurement
ItemDescriptionLimit ranges
EnableEnables or disables use of the mask in the specified zone (A, B, C, D, or E).------------------Beginning FrequencySets the beginning frequency for the zone.-3 to 3 GHz (WCA230A)
-8 to 8 GHz (WCA280A)
Ending FrequencySets the ending frequency for the zone.-3 to 3 GHz (WCA230A)
-8 to 8 GHz (WCA280A)
Measurement
Bandwidth
Offset from Carrier*Specifies which offset side is to be measured. Y ou can select Upper (positive), Lower
Sets the measurement bandwidth.-3 to 3 GHz (WCA230A)
-8 to 8 GHz (WCA280A)
-------------------
(negative), or Both.
2-60WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Editing the Measurement Limits
Table 2-3: Measurement limit items for the spectrum emission mask measurement (cont.)
ItemDescriptionLimit ranges
Fail if signal exceedsSelects the fail mode to detect fail conditions between the measurement results and
the test limits. The choices are:
-------------------
Absolute: Fail is detected when one of the absolute measurement results is
larger than the limit for Beginning Absolute Limit and/or Ending Absolute Limit.
Relative: Fail is detected when one of the relative measurement results is larger
than the limit for Beginning Relative Limit and/or Ending Relative Limit.
Rel OR Abs: Fail is detected when one of the absolute measurement results is
larger than the limit for Beginning Absolute Limit and Ending Absolute Limit OR
one of the relative measurement results is larger than the limit for Beginning
Relative Limit and Ending Relative Limit.
Rel AND Abs: Fail is detected when one of the absolute measurement results is
larger than the limit for Beginning Absolute Limit and Ending Absolute Limit AND
one of the relative measurement results is larger than the limit for Beginning
Relative Limit and Ending Relative Limit.
Beginning Absolute
Limit
Ending Absolute LimitSets an absolute level limit at Ending Frequency.-200 to 200 dBm
Beginning Relative
Limit
Ending Relative LimitSets a relative level limit at Ending Frequency.-200 to 200 dBc
*This item is only available when SEM Offset From Channel is selected.
Sets an absolute level limit at Beginning Frequency.-200 to 200 dBm
Sets a relative level limit at Beginning Frequency.-200 to 200 dBc
Perform the following steps to set measurement limits in the limits editor:
1. Press the Select column to edit side key.
2. Turn the rotary knob or press the arrow keys to select the column that you want
to edit.
3. Press the Enable side key to enable or disable use of the limits for the zone.
4. Press the side key corresponding to the limit item, and then use the rotary knob
or arrow keys to set the value.
5. Press the Default limits to... side key if you want to use a given measurement
limit for the measurement. Refer to Measurement Limit Defaults on page 2-65
for information about the default settings of each measurement limit.
6. When you press the Rescale Graph side key, the graph is rescaled to match
the set limits.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-61
Editing the Measurement Limits
Setting the Gated Output
Power Limits
When you select the Gated Output Power (Idle) row or Gated Output Power
(Active) row in the measurement limits editor, another measurement limits editor
for the gated output power measurement is displayed. Figure 2-33 shows the
measurement limits editor for the gated output power measurement.
Figure 2-33: Gated output power measurement limits editor
Table 2-4 lists the measurement limit items that can be set in the measurement
limits editor.
Table 2-4: Measurement limit items for the gated output power measurement
ItemDescriptionLimit ranges
EnableEnables or disables use of the mask in the specified zone (A, B, C, D, or E).------------------Beginning Time Offset Sets the beginning time from the center of the zone. -10 to 10 s
Ending Time OffsetSets the ending time from the center of the zone. -10 to 10 s
Limit TypeSets the limit type for the measurement. You can select Upper (upper limit) or Lower
(lower limits).
Offset SideSpecifies which offset side is to be measured. You can select Upper (positive), Lower
(negative), or Both.
-------------------
-------------------
2-62WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Editing the Measurement Limits
Table 2-4: Measurement limit items for the gated output power measurement (cont.)
ItemDescriptionLimit ranges
Fail if signal exceedsSelects the fail mode to detect fail conditions between the measurement results and
the test limits. The choices are:
-------------------
Absolute: Fail is detected when one of the absolute measurement results is
larger than the limit for Beginning Absolute Limit and/or Ending Absolute Limit.
Relative: Fail is detected when one of the relative measurement results is larger
than the limit for Beginning Relative Limit and/or Ending Relative Limit.
Rel OR Abs: Fail is detected when one of the absolute measurement results is
larger than the limit for Beginning Absolute Limit and Ending Absolute Limit OR
one of the relative measurement results is larger than the limit for Beginning
Relative Limit and Ending Relative Limit.
Rel AND Abs: Fail is detected when one of the absolute measurement results is
larger than the limit for Beginning Absolute Limit and Ending Absolute Limit AND
one of the relative measurement results is larger than the limit for Beginning
Relative Limit and Ending Relative Limit.
Beginning Absolute
Limit
Ending Absolute LimitSets an absolute level limit at Ending Time Offset.-200 to 200 dBm
Beginning Relative
Limit
Ending Relative LimitSets a relative level limit at Ending Time Offset.-200 to 200 dB
Sets an absolute level limit at Beginning Time Offset.-200 to 200 dBm
Sets a relative level limit at Beginning Time Offset.-200 to 200 dB
Perform the following steps to set measurement limits in the limits editor:
1. Press the Select column to edit side key.
2. Turn the rotary knob or press the arrow keys to select the column that you want
to edit.
3. Press the Enable side key to enable or disable use of the limits for the zone.
4. Press the side key corresponding to the limit item, and then use the rotary knob
or arrow keys to set the value.
5. Press the Default limits to... side key if you want to use a given measurement
limits for the measurement. Refer to Measurement Limit Defaults on page 2-65
for information about the default settings of each measurement limit.
6. When you press the Rescale Graph side key, the graph is rescaled to match the
set limits.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-63
Editing the Measurement Limits
Saving and Loading Measurement Limits
Measurement limits that set in the measurement limits editor can be saved as a file
and loaded from a file. This section describes how to save and load measurement
limits.
Refer to the WCA230A & WCA280A Portable W ir eless Communication Analyzers User Manual, for further information about file operation including how to enter a
file name and how to delete a file.
Saving Measurement
Limits
Loading Measurement
Limits
Perform the following steps to save the current measurement limits to a file:
1. When you open the spectrum emission mask measurement limits editor or
gated output power measurement limits editor, press the Cancel-Back
(MENU) side key to return the measurement limit editor (see Figure 2-30).
2. Press the Save Limits side key to open the Save to File menu.
You can save the limits by using the preset file name or by entering a new file
name.
3. To use the preset file name, press one of the following side keys: Save to
LimitsA, Save to LimitsB, or Save to LimitsC.
4. T o enter a new file name, type a file name in the text box at the top of the menu,
and then press the Save File Now side key .
The file extension *.lmt is automatically added to the limits file.
Perform the following steps to load measurement limits from a file:
1. When you open the spectrum emission mask measurement limits editor or
gated output power measurement limits editor, press the Cancel-Back
(MENU) side key to return the measurement limit editor (see Figure 2-30).
2. Press the Load Limits side key to open the Load From File menu.
3. T o load limits from the preset file, press one of the follo wing side keys: Load
from LimitsA, Load from LimitsB, or Load from LimitsC.
4. To load limits from an existing file, select the file from the file list, and then press the Load File Now side key.
2-64WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Measurement Limit Defaults
T a bles 2-5 through 2-21 list the default limit settings used to perform the pass/file
testing for the 1xEV-DO measurements. Refer to Using the Measurement Limits Editor on page 2-55 for procedures to edit the measurement limits.
Editing the Measurement Limits
Common Limits
Tables 2-5 and 2-6 list the common measurement limits that can be used for the
measurements other than the ACPR, Spectrum Emission Mask and Gated Output
Power measurements.
Table 2-5: Forward link common limits
LimitEnableLowerUpperUnits
Channel PowerNo-15030dBm
Intermod 3rd OrderYesN.A-20dBc
Intermod 5th OrderYesN.A-40dBc
RMS EVMNoN.A10percent
Peak EVMNoN.A31percent
Peak Code Domain ErrorNoN.A0.4dB
RhoYes0.912N.AN.A
Pilot To Code TimingYes-50 n50 ns
Pilot To Code PhaseYes-0.150.15radian
OBWYesN.A1.48 MHz
TauYesN.A0.00001s
Table 2-6: Reverse link common limits
LimitEnableLowerUpperUnits
Channel PowerNo-15030dBm
Intermod 3rd OrderYesN.A-18dBc
Intermod 5th OrderYesN.A-36dBc
RMS EVMNoN.A10percent
Peak EVMNoN.A24percent
Peak Code Domain ErrorNoN.A0.25dB
RhoYes0.994N.AN.A
Pilot To Code TimingYes-10 n10 ns
Pilot To Code PhaseYes-0.150.15radian
OBWYesN.A1.48 MHz
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-65
Editing the Measurement Limits
ACPR Limits
T able 2-7 list the measurement limits that can be used for the ACPR measurement.
Ta ble2-7: Forward and reverse link: all band classes
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual2-73
Editing the Measurement Limits
2-74WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
Syntax and Commands
Command Groups
This section shows the organization of the Option 26 commands in a number of
functional groups.
For detailed information about other commands can be used with the WCA230A
or WCA280A, refer to the WCA230A & WCA280A Wireless Communication Analyzers Programmer Manual.
Items followed by question marks are queries; items without question marks are
commands. Some items in this section have a question mark in parentheses (?) in
the command header section; this indicates that the item can be both a command
and a query.
You need to select one of the following measurement modes before executing any
commands for the Option 26. To set the measurement mode, use the
:INSTrument[:SELect] command using one of the mnemonics listed below:
Table 3-1: Measurement modes
MnemonicMeaning
DEMFL1XEVDO1xEV-DO forward link analysis
DEMRL1XEVDO1xEV-DO reverse link analysis
For more information on SCPI commands and programming structure, refer to
WCA230A & WCA280A Wireless Communication Analyzers Programmer
Manual.
NOTE. Throug ho ut the header descriptions in this section, the word Standard in
italics is substituted for either of the following two measurement standards;
FL1XEVDO (1xEV-DO forward link) or RL1XEVDO (1xEV-DO reverse link).
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual3-1
Command Groups
:CONFigure Commands
Use these commands to set up the analyzer to perform the specified measurement.
Ta ble3-2: :CONFigure commands
HeaderDescription
:CONFigure:Standard:ACPowerSets up the analyzer to the ACPR measurement default settings.
:CONFigure:Standard:CCDFSets up the analyzer to the CCDF measurement default settings.
:CONFigure:Standard:CDPowerSets up the analyzer to the code domain power measurement default settings.
:CONFigure:Standard:CHPowerSets up the analyzer to the channel power measurement default settings.
:CONFigure:Standard:IMSets up the analyzer to the intermodulation measurement default settings.
:CONFigure:Standard:MACCuracySets up the analyzer to the modulation accuracy measurement default settings.
:CONFigure:Standard:OBWidthSets up the analyzer to the occupied band width measurement default settings.
:CONFigure:Standard:PCCHannelSets up the analyzer to the pilot to code channel measurement default settings.
:CONFigure:FL1XEVDO:PVTimeSets up the analyzer to the gated output power measurement default settings.
:CONFigure:Standard:SEMaskSets up the analyzer to the spectrum emission mask measurement default settings.
:DISPlay Commands
Use these commands to control how to show measurement data on the screen.
:DISPlay:Standard:CCDF:LINE:REFerence:STORe Stores a new reference line.
:DISPlay:Standard:CCDF:X[:SCALe]:AUTO (?)Determines whether to set the horizontal scale automatically in the CCDF view.
:DISPlay:Standard:CCDF:X[:SCALe]
:MAXimum (?)
:DISPlay:Standard:CCDF:X[:SCALe]
:OFFSet (?)
:DISPlay:Standard:CCDF:Y[:SCALe]:FITRuns auto-scale on the CCDF view.
:DISPlay:Standard:CCDF:Y[:SCALe]:FULLSets the vertical axis to the default full-scale value in the CCDF view.
:DISPlay:Standard:CCDF:Y[:SCALe]
:MAXimum (?)
:DISPlay:Standard:CCDF:Y[:SCALe]
:MINimum (?)
Sets whether to display the Gaussian line on the CCDF view.
Sets whether to display the reference line on the CCDF view.
Sets the horizontal maximum value (right end) in the CCDF view.
Sets the minimum horizontal value (left end) in the CCDF view.
Sets the maximum vertical value (top end) in the CCDF view.
Sets the minimum vertical value (bottom end) in the CCDF view.
3-2WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
:DISPlay:Standard:DDEMod:MVIew:CORDer(?)Sets the code order.
:DISPlay:Standard:DDEMod:MVIew:FORMat (?)Selects the main view display format.
:DISPlay:Standard:DDEMod:MVIew:X[:SCALe]
:DISPlay:Standard:SPECtrum:Y[:SCALe]:FITRuns auto-scale on the spectrum view.
:DISPlay:Standard:SPECtrum:Y[:SCALe]:FULLSets the vertical axis to the default full-scale value.
:DISPlay:Standard:SPECtrum:Y[:SCALe]
:OFFSet (?)
:DISPlay:Standard:SPECtrum:Y[:SCALe]
:PDIVision (?)
Sets the minimum horizontal value (left end) in the main view.
Sets the horizontal full-scale value in the main view.
Sets the main view’s vertical axis to the default full-scale value.
Sets the minimum vertical value (bottom end) in the main view.
Sets the unit of the vertical axis in the main view.
Sets the vertical full-scale value in the main view.
Sets the minimum horizontal value (left end) in the subview.
Sets the horizontal full-scale value in the subview.
Sets the subview’s vertical axis to the default full-scale value.
Sets the minimum vertical value (bottom end) in the subview.
Sets the vertical full-scale value in the subview.
Sets the minimum horizontal value (left end) in the spectrum view.
Sets the horizontal scale in the spectrum view.
Sets the minimum vertical value (bottom end) in the spectrum view.
Sets the vertical scale in the spectrum view.
Command Groups
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual3-3
:DISPlay:FL1XEVDO:WAVeform:Y[:SCALe]:FITRuns auto-scale on the time domain display.
:DISPlayFL1XEVDO:WAVeform:Y[:SCALe]:FULLSets the vertical axis to the default full scale.
:DISPlay:FL1XEVDO:WAVeform:Y[:SCALe]
:OFFSet (?)
:DISPlay:FL1XEVDO:WAVeform:Y[:SCALe]
:PDIVision (?)
Sets the minimum horizontal value in the time domain display.
Sets the horizontal or time scale per division in the spectrum view.
Sets the minimum vertical value in the time domain display.
Sets the vertical scale per division in the time domain display.
:FETCh Commands
Use these commands to retrieve the measurement from the data taken by the latest
:INITiate command.
If you want to perform a FETCh operation on fresh data, use the :READ
commands, which acquire a new input signal and fetch the measurement results
from that data.
Ta ble3-4: :FETCh commands
HeaderDescription
:FETCh:Standard:ACPower?Returns the ACPR measurement results.
:FETCh:Standard:CCDF?Returns the CCDF measurement results.
:FETCh:Standard:CDPower?Returns the code domain power measurement results.
:FETCh:Standard:CHPower?Returns the channel power measurement results.
:FETCh:Standard:IM?Returns the intermodulation measurement results.
:FETCh:Standard:MACCuracy?Returns the modulation accuracy measurement results.
:FETCh:Standard:OBWidth?Returns the occupied bandwidth measurement results.
:FETCh:Standard:PCCHannel?Returns the pilot-to-code channel measurement results.
:FETCh:FL1XEVDO:PVTime?Returns the gated output power measurement results.
:FETCh:Standard:SEMask?Returns the spectrum emission mask measurement results.
:FETCh:Standard:DISTribution:CCDF?Returns the distribution data of the CCDF measurement.
:FETCh:FL1XEVDO:TAMPlitude:PVTime?Returns the time amplitude for the gated output power measurement.
:FETCh:Standard:SPECtrum:ACPower?Returns the spectrum waveform data of the ACPR measurement.
:FETCh:Standard:SPECtrum:CHPower?Returns the spectrum waveform data of the channel power measurement.
:FETCh:Standard:SPECtrum:IM?Returns the spectrum waveform data of the intermodulation measurement.
:FETCh:Standard:SPECtrum:OBWidth?Returns the spectrum waveform data of the occupied bandwidth measurement.
3-4WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
:MMEMory Commands
Use these commands to manipulate files on the hard disk or floppy disk.
Table 3-5: :MMEMory commands
HeaderDescription
:MMEMory:LOAD:LIMitLoads the limit from the specified file.
:MMEMory:STORe:LIMitStores the limit in the specified file.
:MMEMory:STORe:STABleStores the symbol table in the specified file.
:READ Commands
Use these commands to acquire an input signal once in the single mode and obtain
the measurement results from that data.
If you want to fetch the measurement results from the data currently residing in the
memory without acquiring the input signal, use the :FETCh command.
Command Groups
Table 3-6: :READ commands
HeaderDescription
:READ:Standard:ACPower?Returns the ACPR measurement results.
:READ:Standard:CCDF?Returns the CCDF measurement results.
:READ:Standard:CHPower?Returns the channel power measurement results.
:READ:Standard:IM?Returns the intermodulation measurement results.
:READ:Standard:OBWidth?Returns the occupied bandwidth measurement results.
:READ:FL1XEVDO:PVTime?Returns the gated output power measurement results.
:READ:Standard:SEMask?Returns the spectrum emission mask measurement results.
:READ:Standard:DISTribution:CCDF?Returns the distribution data of the CCDF measurement.
:READ:FL1XEVDO:TAMPlitude:PVTime?Returns the time amplitude for the gated output power measurement.
:READ:Standard:SPECtrum:ACPower?Returns the spectrum waveform data of the ACPR measurement.
:READ:Standard:SPECtrum:CHPower?Returns the spectrum waveform data of the channel power measurement.
:READ:Standard:SPECtrum:IM?Returns the spectrum waveform data of the intermodulation measurement.
:READ:Standard:SPECtrum:OBWidth?Returns the spectrum waveform data of the occupied bandwidth measurement.
WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual3-5
Command Groups
:SENSe Commands
Use these commands to set the detailed measurement conditions.
Ta ble3-7: :SENSe commands
HeaderDescription
[:SENSe]:Standard subgroup
[:SENSe]:Standard:ACQuisition:CHIPs (?)Sets the acquisition length in chips.
[:SENSe]:Standard:ACQuisition:HISTory (?)Sets the acquisition history.
[:SENSe]:Standard:ACQuisition:SEConds (?)Sets the acquisition length in seconds.
[:SENSe]:Standard:ANALysis:INTerval (?)Sets the analysis interval.
[:SENSe]:Standard:ANALysis:OFFSet (?)Sets the analysis offset.
[:SENSe]:Standard:BLOCk (?)Sets the number of the block to be measured.
[:SENSe]:Standard[:IMMediate]Starts the calculation for the acquired data.
[:SENSe]:Standard:MEASurement (?)Selects the measurement item.
[:SENSe]:Standard:SPECtrum:OFFSet (?)Sets the spectrum offset within the time window.
[:SENSe]:Standard:SPECtrum:TINTerval?Returns the length of the time-domain information used to construct the spectrum
[:SENSe]:Standard:ACPower:FILTer:TYPE (?)Sets the filter for the ACPR measurement.
[:SENSe]:Standard:ACPower:LIMit
:ADJacent[1]|2|3..|12[:STATe] (?)
[:SENSe]:Standard:CCDF subgroup
[:SENSe]:Standard:CCDF:RMEasurementClears the CCDF accumulator and restarts the measurement.
[:SENSe]:Standard:CCDF:THReshold (?)Sets the threshold for the CCDF measurement.
[:SENSe]:Standard:CDPower subgroup
[:SENSe]:Standard:CDPower:ACCThreshold (?)Sets the active channel threshold level for the code domain power measurement.
[:SENSe]:FL1XEVDO:CDPower:CHANnel
[:TYPE] (?)
[:SENSe]:Standard:CDPower:FILTer
:MEASurement (?)
[:SENSe]:Standard:CDPower:IQSWap (?)Sets whether to enable or disable IQ swapping for the code domain power
[:SENSe]:RL1XEVDO:CDPower:LCMask:I (?)Sets the 11-digit mask of the I long code for the code domain power measurement.
[:SENSe]:RL1XEVDO:CDPower:LCMask:Q (?)Sets the 11-digit mask of the Q long code for the code domain power measurement.
[:SENSe]:Standard:CDPower:MLEVel (?)Selects the measurement level for the code domain power measurement.
[:SENSe]:FL1XEVDO:CDPower:PNOFfset (?)Sets the PN offset for the code domain power measurement.
[:SENSe]:Standard:CDPower:SELect:CODE (?)Sets the code in the halfslot for the code domain power measurement.
[:SENSe]:Standard:CDPower:SELect:HSLot (?)Sets the halfslot for the code domain power measurement.
Sets the bandwidth of the main channel for the ACPR measurement.
Sets the filter roll-off rate for the ACPR measurement.
Sets whether to enable or disable the adjacent limit testing for the ACPR
measurement.
Selects the channel type for the code domain power measurement.
Selects the measurement filter for the code domain power measurement.
measurement.
3-6WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual
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