Preset To Standard (Custom OFDM)

Preset To Standard is used to configure the VSA to measure an IEEE Institute of Electrical and Electronics Engineers. A US-based membership organisation that includes engineers, scientists, and students in electronics and related fields. The IEEE developed the 802 series wired and wireless LAN standards. Visit the IEEE at http://www.ieee.org standard defined OFDM Orthogonal Frequency Division Multiplexing: OFDM employs multiple overlapping radio frequency carriers, each operating at a carefully chosen frequency that is Orthogonal to the others, to produce a transmission scheme that supports higher bit rates due to parallel channel operation. OFDM is an alternative tranmission scheme to DSSS and FHSS. signal. When a standard preset is Selected, the VSA automatically configures the OFDM demodulator to the parameters shown in the following table:

Available OFDM Standard Presets
WLAN (802.11a)	VSA configured to measure a standard IEEE 802.11a compliant signal.
WLAN (802.11ah)	VSA configured to measure standard IEEE 802.11ah compliant signals: 1 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second., 2 MHz, 4 MHz, 8 MHz, and 16 MHz.
DAB	VSA configured to measure standard Digital Audio Broadcasting signals: Mode I, Mode II, Mode III, and Mode IV Initialization vector.
DVB-T/H	VSA configured to measure standard Digital Video Broadcasting Terrestrial/Handheld signals: 2K 1/8, 4K 1/8, and 8K 1/8.
DVB-SH	VSA configured to measure standard Digital Video Broadcasting - Satellite services to Handheld signal: 1k mode.
ISDB-T	VSA configured to measure a standard Integrated Services Digital Broadcasting - Terrestrial signal: Mode3, 1+12.

The Custom OFDM demodulator must be selected before these standard presets are available.

OFDM Standard Preset Configuration: WLAN WLAN - Wireless Local Area Network: A system that includes the distribution system (DS), access points (APs), and portal entities. It is also the logical location of distribution and integration service functions of an extended service set (ESS). A WLAN system contains one or more APs and zero or more portals in addition to the DS. (802.11a)
Parameter	IEEE 802.11a
Span	25 MHz

Format tab
FFT Fast Fourier Transform: A mathematical operation performed on a time-domain signal to yield the individual spectral components that constitute the signal. See Spectrum. Length	64
Guard Interval	0.25 (0.8 µs)
Guard Lower Subcarriers	6 subcarriers
Guard Upper Subcarriers	5 subcarriers
OFDM System Sample Freq.	20 MHz
Pilot IQ Values	Standard values
Preamble IQ values	Standard values
QAM Identifiers The QAM Identifiers parameter is specified in the Format tab > QAM Idenifiers text box (Custom OFDM Demod Properties dialog box).	0 1 2 3 4 5
QAM Quadrature Amplitude Modulation Levels	0 1 2 4 6 8
Resource Map	Standard values
Resource Modulation	Standard values
Resource Repeat Index The resource map for most OFDM signals will consist of one or more preamble symbols, sometimes followed by specialized header symbols, followed by a repeating pattern of similarly-formatted symbols. For these repeating symbols, it is only necessary to define the pattern once; the Resource Repeat Index tells the analyzer how to loop when the end of the Resource Map file is reached.	5 Symbols
Signal is Bursted	Selected
Transmitter Antennas	1
Transmitter Window Beta	0.005
QAM Identifier Boost Levels	1
Unknown Pilot Boost Levels	1
User Boost Levels	1

Time tab
Measurement Interval	60 Symbols
Measurement Offset	0
Result Length	60 Symbols
Result Length Selection	Automatic
Search Length	1 msec
Auto Pulse Search Threshold	Selected
Pulse Search Enabled	Selected
Pulse Search Threshold	-20 db

Equalizer & Tracking tab
Equalizer Use Data	Cleared
Equalizer Use DC Pilot	Selected
Equalizer Use Pilots	Cleared
Equalizer Use Preamble	Selected
Equalizer Averaging Mode	Equal Weight
Track Amplitude	Cleared
Track Phase	Selected
Track Timing	Cleared

Advanced tab
EVM Error vector magnitude (EVM): A quality metric in digital communication systems. See the EVM metric in the Error Summary Table topic in each demodulator for more information on how EVM is calculated for that modulation format. Normalized by Reference	Selected
Extended Frequency Lock Range	Selected
Extended Frequency Lock Range Width	10 Subcarriers
Mirror Frequency Spectrum	Cleared
Symbol Time Adjustment	-3.125%
Synchronization Mode	TimeCorrelation
Display Data Subcarriers	Selected
Display EVM in Percent	Cleared
Display Null Subcarriers	Cleared
Display Pilot Subcarriers	Selected
Display Preamble Subcarriers	Selected
Display Subcarrier Color Based on User ID	Cleared
Display Sync Correlation in Percent	Cleared
Normalize IQ Traces	Selected

OFDM Standard Preset Configuration: WLAN (802.11ah)
Parameter	1 MHz	2 MHz	4 MHz	8 MHz	16 MHz
Span	1.5625 MHz	3.125 MHz	6.25 MHz	12.5 MHz	25 MHz

Format tab
FFT Length	32	64	128	256	512
Guard Interval	0.25 (0.8 µs)	0.25 (0.8 µs)	0.25 (0.8 µs)	0.25 (0.8 µs)	0.25 (0.8 µs)
Guard Lower Subcarriers	0 subcarriers	0 subcarriers	0 subcarriers	0 subcarriers	0 subcarriers
Guard Upper Subcarriers	0 subcarriers	0 subcarriers	0 subcarriers	0 subcarriers	0 subcarriers
OFDM System Sample Freq.	1 MHz	2 MHz	4 MHz	8 MHz	16 MHz
Pilot IQ Values	Standard values	Standard values	Standard values	Standard values	Standard values
Preamble IQ values	Standard values	Standard values	Standard values	Standard values	Standard values
QAM Identifiers	0 1 2 3 4 5	0 1 2 3 4 5	0 1 2 3 4 5	0 1 2 3 4 5	0 1 2 3 4 5
QAM Levels	0 1 2 4 6 8	0 1 2 4 6 8	0 1 2 4 6 8	0 1 2 4 6 8	0 1 2 4 6 8
Resource Map	Standard values	Standard values	Standard values	Standard values	Standard values
Resource Modulation	Standard values	Standard values	Standard values	Standard values	Standard values
Resource Repeat Index	14 Symbols	6 Symbols	6 Symbols	6 Symbols	6 Symbols
Signal is Bursted	Selected	Selected	Selected	Selected	Selected
Transmitter Antennas	1	1	1	1	1
Transmitter Window Beta	0.005	0.005	0.005	0.005	0.005
QAM Identifier Boost Levels	1	1	1	1	1
Unknown Pilot Boost Level	1	1	1	1	1
User Boost Levels	1	1, 1.037749, 1	1, 1.046974, 1	1, 1.2455, 1	1, 1.5254, 1

Time tab
Measurement Interval	60 Symbols	60 Symbols	15 Symbols	15 Symbols	15 Symbols
Measurement Offset	0	0	0	0	0
Result Length	77 Symbols	90 Symbols	15 Symbols	15 Symbols	15 Symbols
Result Length Selection	Automatic	Automatic	Automatic	Automatic	Automatic
Search Length	8 msec	8 msec	3.64 msec	3.64 msec	3.64 msec
Auto Pulse Search Threshold	Selected	Selected	Selected	Selected	Selected
Pulse Search Enabled	Selected	Selected	Selected	Selected	Selected
Pulse Search Threshold	-20 db	-20 db	-20 db	-20 db	-20 db

Equalizer & Tracking tab
Equalizer Use Data	Cleared	Cleared	Cleared	Cleared	Cleared
Equalizer Use DC Pilot	Selected	Selected	Selected	Selected	Selected
Equalizer Use Pilots	Cleared	Cleared	Cleared	Cleared	Cleared
Equalizer Use Preamble	Selected	Selected	Selected	Selected	Selected
Equalizer Averaging Mode	Equal Weight	Equal Weight	Equal Weight	Equal Weight	Equal Weight
Track Amplitude	Selected	Selected	Selected	Selected	Selected
Track Phase	Selected	Selected	Selected	Selected	Selected
Track Timing	Selected	Selected	Selected	Selected	Selected

Advanced tab
EVM Normalized by Reference	Selected	Selected	Selected	Selected	Selected
Extended Frequency Lock Range	Selected	Selected	Selected	Selected	Selected
Extended Frequency Lock Range Width	10 Subcarriers	10 Subcarriers	10 Subcarriers	10 Subcarriers	10 Subcarriers
Mirror Frequency Spectrum	Cleared	Cleared	Cleared	Cleared	Cleared
Symbol Time Adjustment	-3.125%	-3.125%	-3.125%	-3.125%	-3.125%
Synchronization Mode	CyclicPrefix	CyclicPrefix	CyclicPrefix	CyclicPrefix	CyclicPrefix
Synchronization Region Selection	Automatic	Automatic	Automatic	Automatic	Automatic
Display Data Subcarriers	Selected	Selected	Selected	Selected	Selected
Display EVM in Percent	Cleared	Cleared	Cleared	Cleared	Cleared
Display Null Subcarriers	Cleared	Cleared	Cleared	Cleared	Cleared
Display Pilot Subcarriers	Selected	Selected	Selected	Selected	Selected
Display Preamble Subcarriers	Selected	Selected	Selected	Selected	Selected
Display Subcarrier Color Based on User ID	Cleared	Cleared	Cleared	Cleared	Cleared
Display Sync Correlation in Percent	Cleared	Cleared	Cleared	Cleared	Cleared
Normalize IQ Traces	Selected	Selected	Selected	Selected	Selected
Synchronization Reference Interval	10	10	10	10	10
Synchronization Reference Offset	0	0	0	0	0
Synchronization Search Interval	1	1	1	1	1
Synchronization Search Offset	0	0	0	0	0

OFDM Standard Preset Configuration: DAB
Parameter	Mode I	Mode II	Mode III	Mode IV
Span	3.2 MHz	3.2 MHz	3.2 MHz	3.2 MHz

Format tab
FFT Length	2048	512	256	1024
Guard Interval	0.24609375	0.24609375	0.24609375	0.24609375
Guard Lower Subcarriers	256 subcarriers	64 subcarriers	32 subcarriers	128 subcarriers
Guard Upper Subcarriers	255 subcarriers	63 subcarriers	31 subcarriers	127 subcarriers
OFDM System Sample Freq.	2.048 MHz	2.048 MHz	2.048 MHz	2.048 MHz
Pilot IQ Values	---	---	---	---
Preamble IQ values	Standard values	Standard values	Standard values	Standard values
QAM Identifiers	0 1 2 3 4 5	0 1 2 3 4 5	0 1 2 3 4 5	0 1 2 3 4 5
QAM Levels	0 1 2 4 6 8	0 1 2 4 6 8	0 1 2 4 6 8	0 1 2 4 6 8
Resource Map	Standard values	Standard values	Standard values	Standard values
Resource Modulation	Standard values	Standard values	Standard values	Standard values
Resource Repeat Index	1 Symbol	1 Symbol	1 Symbol	1 Symbol
Signal is Bursted	Selected	Selected	Selected	Selected
Transmitter Antennas	1	1	1	1
Transmitter Window Beta	0.005	0.005	0.005	0.005
QAM Identifier Boost Levels	1	1	1	1
Unknown Pilot Boost Levels	1	1	1	1
User Boost Levels	1	1	1	1

Time tab
Measurement Interval	60 Symbols	60 Symbols	60 Symbols	60 Symbols
Measurement Offset	0	0	0	0
Result Length	60 Symbols	60 Symbols	60 Symbols	60 Symbols
Result Length Selection	Automatic	Automatic	Automatic	Automatic
Search Length	200 msec	200 msec	200 msec	200 msec
Auto Pulse Search Threshold	Selected	Selected	Selected	Selected
Pulse Search Enabled	Selected	Selected	Selected	Selected
Pulse Search Threshold	-20 db	-20 db	-20 db	-20 db

Equalizer & Tracking tab
Equalizer Use Data	Cleared	Cleared	Cleared	Cleared
Equalizer Use DC Pilot	Selected	Selected	Selected	Selected
Equalizer Use Pilots	Cleared	Cleared	Cleared	Cleared
Equalizer Use Preamble	Selected	Selected	Selected	Selected
Equalizer Averaging Mode	Equal Weight	Equal Weight	Equal Weight	Equal Weight
Track Amplitude	Cleared	Cleared	Cleared	Cleared
Track Phase	Selected	Selected	Selected	Selected
Track Timing	Cleared	Cleared	Cleared	Cleared

Advanced tab
EVM Normalized by Reference	Selected	Selected	Selected	Selected
Extended Frequency Lock Range	Selected	Selected	Selected	Selected
Extended Frequency Lock Range Width	10 Subcarriers	10 Subcarriers	10 Subcarriers	10 Subcarriers
Mirror Frequency Spectrum	Cleared	Cleared	Cleared	Cleared
Symbol Time Adjustment	-3.125%	-3.125%	-3.125%	-3.125%
Synchronization Mode	CyclicPrefix	CyclicPrefix	CyclicPrefix	CyclicPrefix
Display Data Subcarriers	Selected	Selected	Selected	Selected
Display EVM in Percent	Cleared	Cleared	Cleared	Cleared
Display Null Subcarriers	Cleared	Cleared	Cleared	Cleared
Display Pilot Subcarriers	Selected	Selected	Selected	Selected
Display Preamble Subcarriers	Selected	Selected	Selected	Selected
Display Subcarrier Color Based on User ID	Cleared	Cleared	Cleared	Cleared
Display Sync Correlation in Percent	Cleared	Cleared	Cleared	Cleared
Normalize IQ Traces	Selected	Selected	Selected	Selected

OFDM Standard Preset Configuration: DVB-T/H
Parameter	2k mode	4k mode	8k mode
Span	14.286 MHz	14.286 MHz	14.286 MHz

Format tab
FFT Length	2048	4096	8192
Guard Interval	0.125	0.125	0.125
Guard Lower Subcarriers	172 subcarriers	344 subcarriers	688 subcarriers
Guard Upper Subcarriers	171 subcarriers	343 subcarriers	687 subcarriers
OFDM System Sample Freq.	9.142857 MHz	9.142857 MHz	9.142857 MHz
Pilot IQ Values	Standard values	Standard values	Standard values
Preamble IQ values	---	---	---
QAM Identifiers	0 1 2 3 4 5	0 1 2 3 4 5	0 1 2 3 4 5
QAM Levels	0 1 6 4 6 8	0 1 6 4 6 8	0 1 6 4 6 8
Resource Map	Standard values	Standard values	Standard values
Resource Modulation	Standard values	Standard values	Standard values
Resource Repeat Index	0 Symbols	0 Symbols	0 Symbols
Signal is Bursted	Cleared	Cleared	Cleared
Transmitter Antennas	1	1	1
Transmitter Window Beta	0.005	0.005	0.005
QAM Identifier Boost Levels	1	1	1
Unknown Pilot Boost Levels	1	1	1
User Boost Levels	1	1	1

Time tab
Measurement Interval	4 Symbols	4 Symbols	4 Symbols
Measurement Offset	0	0	0
Result Length	4 Symbols	4 Symbols	4 Symbols
Result Length Selection	Automatic	Automatic	Automatic
Search Length	58.716 msec	58.464 msec	58.464 msec
Auto Pulse Search Threshold	Selected	Selected	Selected
Pulse Search Enabled	Selected	Selected	Selected
Pulse Search Threshold	-20 db	-20 db	-20 db

Equalizer & Tracking tab
Equalizer Use Data	Cleared	Cleared	Cleared
Equalizer Use DC Pilot	Selected	Selected	Selected
Equalizer Use Pilots	Cleared	Cleared	Cleared
Equalizer Use Preamble	Selected	Selected	Selected
Equalizer Averaging Mode	Equal Weight	Equal Weight	Equal Weight
Track Amplitude	Cleared	Cleared	Cleared
Track Phase	Selected	Selected	Selected
Track Timing	Cleared	Cleared	Cleared

Advanced tab
EVM Normalized by Reference	Selected	Selected	Selected
Extended Frequency Lock Range	Selected	Selected	Selected
Extended Frequency Lock Range Width	10 Subcarriers	10 Subcarriers	10 Subcarriers
Mirror Frequency Spectrum	Cleared	Cleared	Cleared
Symbol Time Adjustment	-3.125%	-3.125%	-3.125%
Synchronization Mode	CyclicPrefix	CyclicPrefix	CyclicPrefix
Display Data Subcarriers	Selected	Selected	Selected
Display EVM in Percent	Cleared	Cleared	Cleared
Display Null Subcarriers	Cleared	Cleared	Cleared
Display Pilot Subcarriers	Selected	Selected	Selected
Display Preamble Subcarriers	Selected	Selected	Selected
Display Subcarrier Color Based on User ID	Cleared	Cleared	Cleared
Display Sync Correlation in Percent	Cleared	Cleared	Cleared
Normalize IQ Traces	Selected	Selected	Selected

OFDM Standard Preset Configuration: DVB-SH
Parameter	1k mode
Span	2.857 MHz

Format tab
FFT Length	1024
Guard Interval	0.03125
Guard Lower Subcarriers	86 subcarriers
Guard Upper Subcarriers	85 subcarriers
OFDM System Sample Freq.	1.8285714 MHz
Pilot IQ Values	Standard values
Preamble IQ values	---
QAM Identifiers	0 1 2 3 4 5
QAM Levels	0 1 2 4 6 8
Resource Map	Standard values
Resource Modulation	Standard values
Resource Repeat Index	1 sym
Signal is Bursted	Selected
Transmitter Antennas	1
Transmitter Window Beta	0.005
QAM Identifier Boost Levels	1
Unknown Pilot Boost Levels	1
User Boost Levels	1

Time tab
Measurement Interval	60 Symbols
Measurement Offset	0
Result Length	60 Symbols
Result Length Selection	Automatic
Search Length	200 msec
Auto Pulse Search Threshold	Selected
Pulse Search Enabled	Selected
Pulse Search Threshold	-20 db

Equalizer & Tracking tab
Equalizer Use Data	Cleared
Equalizer Use DC Pilot	Selected
Equalizer Use Pilots	Cleared
Equalizer Use Preamble	Selected
Equalizer Averaging Mode	Equal Weight
Track Amplitude	Cleared
Track Phase	Selected
Track Timing	Cleared

Advanced tab
EVM Normalized by Reference	Selected
Extended Frequency Lock Range	Selected
Extended Frequency Lock Range Width	10 Subcarriers
Mirror Frequency Spectrum	Cleared
Symbol Time Adjustment	-3.125%
Synchronization Mode	CyclicPrefix
Display Data Subcarriers	Selected
Display EVM in Percent	Cleared
Display Null Subcarriers	Cleared
Display Pilot Subcarriers	Selected
Display Preamble Subcarriers	Selected
Display Subcarrier Color Based on User ID	Cleared
Display Sync Correlation in Percent	Cleared
Normalize IQ Traces	Selected

OFDM Standard Preset Configuration: ISDB-T
Parameter	Mode3, 1+12
Span	12.698 MHz

Format tab
FFT Length	8192
Guard Interval	0.125
Guard Lower Subcarriers	1288 subcarriers
Guard Upper Subcarriers	1287 subcarriers
OFDM System Sample Freq.	8.127 MHz
Pilot IQ Values	Standard values
Preamble IQ values	---
QAM Identifiers	0 1 2 3 4 5
QAM Levels	0 1 2 4 6 8
Resource Map	Standard values
Resource Modulation	Standard values
Resource Repeat Index	0 sym
Signal is Bursted	Cleared
Transmitter Antennas	1
Transmitter Window Beta	0.005
QAM Identifier Boost Levels	1, 1.3333
Unknown Pilot Boost Levels	1
User Boost Levels	1

Time tab
Measurement Interval	10 Symbols
Measurement Offset	0
Result Length	10 Symbols
Result Length Selection	Automatic
Search Length	25 msec
Auto Pulse Search Threshold	Selected
Pulse Search Enabled	Cleared
Pulse Search Threshold	-20 db

Equalizer & Tracking tab
Equalizer Use Data	Selected
Equalizer Use DC Pilot	Selected
Equalizer Use Pilots	Selected
Equalizer Use Preamble	Cleared
Equalizer Averaging Mode	Equal Weight
Track Amplitude	Cleared
Track Phase	Selected
Track Timing	Selected

Advanced tab
EVM Normalized by Reference	Selected
Extended Frequency Lock Range	Selected
Extended Frequency Lock Range Width	10 Subcarriers
Mirror Frequency Spectrum	Cleared
Symbol Time Adjustment	-3.125%
Synchronization Mode	CyclicPrefix
Display Data Subcarriers	Selected
Display EVM in Percent	Cleared
Display Null Subcarriers	Cleared
Display Pilot Subcarriers	Selected
Display Preamble Subcarriers	Selected
Display Subcarrier Color Based on User ID	Cleared
Display Sync Correlation in Percent	Cleared
Normalize IQ Traces	Selected