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Wireless LAN Consortium ERP Physical Layer Test Suite v3.1
Report
UNH InterOperability Laboratory — 121 Technology Drive, Suite 2
— Durham, NH 03824 — +1-603-862-0090
November 4, 2009 Report Rev. 1.0
Jason Contact Network Switch, Inc 3245 Fantasy Parkway
Happville, WZ 94035 Mr. Contact, Enclosed are the results from the
ERP Physical Layer Test Suite testing performed on the:
Network Switch 11g Wireless STA
This testing pertains to a set of standard requirements, put
forth in the IEEE Std 802.11™-2007 Edition. The tests performed are
part of the ERP Physical Layer Test Suite v3.1, which is available
on the UNH-IOL’s website:
ftp://ftp.iol.unh.edu/pub/wireless/TestSuites/phy/802.11g_PHY_Test_Suite_v3.1.pdf
Cover Letter Cover Letter
Issues Observed While Testing General Note – When associated to
an access point advertising support for only 6 Mbps traffic, the
DUT was observed to always transmit a 1 Mbps frame approximately 10
µs prior to transmission of each 6 Mbps data frames. This behav-ior
occurred on channels 1, 6, and 11, and only for 6 Mbps traffic; all
other OFDM traffic did not exhibit this behavior. 19.1.4 - ERP
SERVICE Field Bit Verification - The DUT was observed to improperly
set bit 2 to a value of zero. 19.2.5 - ERP-DSSS Transmit Spectral
Mask - The transmitted spectral mask of the DUT was observed to
fall outside the conformance limits for channels 1, 6 and 11.
19.2.8 - Transmit Power-on and Power-down Ramp Timing - Power-off
timing values were observed to fall outside of the conformant
limits when measured on the carrier envelope with modulation
present.
As always, we welcome any comments regarding this Test Suite. If
you have any questions about the test proce-dures or results,
please contact me via e-mail at [email protected] or by phone at
+1-603-862-2263. Regards,
John Q. Tester John Q. Tester
ftp://ftp.iol.unh.edu/pub/wireless/TestSuites/phy/802.11g_PHY_Test_Suite_v3.1.pdfmailto:[email protected]
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 2 Report Rev. 1.0
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Table 1 - Result Key – The following table contains possible
results and their meanings
Result Interpretation PASS The DUT was observed to exhibit
conformant behavior. FAIL The DUT was observed to exhibit
non-compliant behavior.
PASS with Comments
The DUT was observed to exhibit conformant behavior, however,
additional explanation of the situation is included.
Warning The DUT was observed to exhibit behavior that is not
recommended. Informative Results are for informative purposes only
and are not judged on a pass or fail basis.
Refer to Comments
From the observations, a valid pass or fail could not be
determined. An additional explanation of the situation is
included.
Not Applicable The DUT does not support the technology required
to perform these tests.
Not Available Due to testing station or time limitations, the
tests could not be performed, or were performed in a limited
capacity. Not Tested Not tested due to time constraint of the test
period.
Borderline The observed values of the specified parameter are
valid at one extreme, and invalid at the other.
Table 2 - Setup and Configuration Information
Product Manufacturer Network Switch, Inc. Model 11a Wireless AP
IOL Serial Number Wireless-NSIC-0000012345 MAC Address
00:0G:F2:QZ:7X:03 Hardware Version 7M Firmware Version 2.2.3.1
2004-09-29 Test System Hardware Vector Signal Analyzer
Rohde&Schwarz,FSQ-26,100271/026,4.35 Vector Signal Generator
Rohde&Schwarz,SMU200A,1141.2005k02/100077,1.45.2.6-01.10.10
(Release)
http://www.iol.unh.edu/certifyDoc/
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 3 Report Rev. 1.0
GROUP 1: PLCP Tests Test # and Label Part(s) Result(s)
a PASS 19.1.1 - Transmit and Receive Supported Data Rates b
PASS
Comments on Test Procedure Purpose: To verify that the device
under test (DUT) can operate at all defined mandatory data rates,
and any op-tional supported data rates. ERP stations are required
to support three different preamble and header formats including
Long and Short formats to provide interoperability with existing
legacy stations that use DSSS modulation, and the preamble and
header formats described for OFDM capable PHYs. In addition to the
mandatory data rates, many optional modulation schemes may be
implemented extending the payload data rates. The DUT is configured
to operate at all mandatory formats and data is exchanged to verify
proper transmission and reception. Likewise, the DUT is also
configured for any supported optional formats and transmission and
reception is verified. a. The DUT should be capable of transmission
and reception at 1, 2, 5.5, 6, 11, 12, and 24 Mbps data rates. b.
The DUT should be capable of transmission and reception at all
supported optional data rates. Comments on Test Results a. The DUT
was observed to operate at 1, 2, 5.5, 6, 11, 12, and 24 Mbps data
rates. b. The DUT was observed to support optional data rates of 9,
18, 36, 48, and 54 Mbps.
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 4 Report Rev. 1.0
Test # and Label Part(s) Result(s) a PASS b PASS c PASS d
PASS
19.1.2 - DSSS Long Preamble and Header Format
e PASS Comments on Test Procedure Purpose: To verify that the
device under test (DUT) conforms to the direct sequence spread
spectrum (DSSS) Long Preamble and header format. During
transmission, PSDUs are appended to a PLCP preamble and header to
create the PPDU. Two different length preambles and headers are
defined: a mandatory Long preamble and header for backwards
compatibility with existing 1 Mbps and 2 Mbps DSSS devices, and an
optional short preamble and header. At the receiver, the PLCP
preamble and header are processed to aid in demodulation and
deliver of the PSDU. The DUT is configured to transmit traffic
(either continuously or in burst mode) to a link partner, which is
then demodulated and decoded at the receiver to verify the Long
format and content of the preamble and header. a. The DUT should
transmit the preamble and header at a 1 Mbps data rate. b. The SYNC
field should contain all scrambled “1”s and the scrambler should be
initialized to [1101100] b. c. The SFD field should contain [F3 A0]
h. d. In all cases, the SIGNAL field should contain the appropriate
data rate used by the DUT for PSDU transmis-
sion. e. The LENGTH field should indicate the proper time, in
microseconds, required to transmit the PSDU. Comments on Test
Results a. The DUT was observed to properly transmit the preamble
and header at a 1 Mbps data rate. b. The SYNC field was observed to
contain all scrambled “1”s and the scrambler was initialized to
[1101100] b. c. The SFD field was observed to contain [F3 A0] h. d.
For all supported data rates, the SIGNAL field was observed to
contain the appropriate data rate used for PSDU
transmission. (Refer to test 19.1.1 - Transmit and Receive
Supported Data Rates for rate information). e. The LENGTH field was
observed to indicate the proper time, in microseconds, required to
transmit the PSDU.
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 5 Report Rev. 1.0
Test # and Label Part(s) Result(s) a PASS b PASS c PASS d
PASS
19.1.3 - DSSS Short Preamble and Header Format
e PASS Comments on Test Procedure Purpose: To verify that the
device under test (DUT) conforms to the direct sequence spread
spectrum (DSSS) Short Preamble and header format. During
transmission, PSDUs are appended to a PLCP preamble and header to
create the PPDU. Two different length preambles and headers are
defined: a mandatory Long preamble and header for backwards
compatibility with existing 1 Mbps and 2 Mbps DSSS devices, and an
optional short preamble and header. At the receiver, the PLCP
preamble and header are processed to aid in demodulation and
deliver of the PSDU. The DUT is configured to transmit traffic
(either continuously or in burst mode) to a link partner, which is
then demodulated and decoded at the receiver to verify the Short
format and content of the preamble and header. a. The DUT should
transmit the preamble at a 1 Mbps data rate, and the header at a 2
Mbps data rate. b. The SYNC field should contain all scrambled “0”s
and the scrambler should be initialized to [001 1011] b. c. The
shortSFD field should contain [05 CF] h, and be the time reverse of
the SFD in the Long preamble. d. In all cases, the SIGNAL field
should contain the appropriate data rate used by the DUT for PSDU
transmis-
sion. e. The LENGTH field should indicate the proper time, in
microseconds, required to transmit the PSDU. Comments on Test
Results a. The DUT was observed to transmit the preamble at a 1
Mbps data rate, and the header at a 2 Mbps data rate. b. The SYNC
field was observed to contain all scrambled “0”s and the scrambler
was initialized to [001 1011] b. c. The SFD field was observed to
contain [05 CF] h, and be the time reverse of the SFD in the Long
preamble d. For all supported data rates, the SYNC field was
observed to contain the appropriate data rate used for PSDU
transmission. e. The LENGTH field was observed to indicate the
proper time, in microseconds, required to transmit the PSDU.
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 6 Report Rev. 1.0
Test # and Label Part(s) Result(s) a PASS b FAIL c PASS
19.1.4 - ERP SERVICE Field Bit Verification
d PASS Comments on Test Procedure Purpose: To verify if the
device under test (DUT) sets all bit subfields in the DSSS-Long and
Short header SER-VICE field appropriately. ERP stations are
required to support three different preamble and header formats
including Long and Short formats to provide interoperability with
existing legacy stations that use DSSS modulation, and the preamble
and header formats described for OFDM capable PHYs. In addition to
the mandatory data rates, many optional modulation schemes may be
implemented extending the payload data rates. To support optional
modes included in the ERP, both the Long and Short preamble SERVICE
fields differ from those outlined in Clause 18. The DUT is
configured to operate at all supported optional formats and data is
exchanged to verify proper transmission and reception. a. Reserved
bits 0, 1, and 4 should always be set to zero. b. Bit 2 should
always be set to one. c. When non-ERP-PBCC modulation is used, bit
3 should be set to zero. Otherwise, bit 3 should be set to one. d.
Bits 5, 6, and 7 should correctly indicate data field length
ambiguities.
Comments on Test Results a. The DUT was observed to correctly
set all reserved bits in the SERVICE field to zero. b. The DUT was
observed to improperly set bit 2 to a value of zero, indicating the
transmit frequency and symbol
clocks were not derived from the same oscillator. c. When
non-PBCC modulation was used, the DUT properly set bit 3 to a value
of zero. d. The DUT was observed not to support any PBCC
modulation, and thus correctly set bits 5 and 6 to zero at all
times. The CCK length extension, bit 7, was observed as set
properly on ambiguous 11 Mbps frames.
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 7 Report Rev. 1.0
GROUP 2: PMD Transmit Tests Test # and Label Part(s) Result(s)
19.2.1 - Operating Channel Capability a PASS Comments on Test
Procedure Purpose: To verify that the device under test (DUT) is
capable of operating on all defined channels. The defined operating
channel requirements for an ERP device are established by regional
and national regulatory administrations. Currently seven regions
are defined, each supporting various channel operating frequency
ranges to which a conformant device must adhere if operating in a
given region. This test verifies whether the DUT is capable of
operating on all defined channels for all supported operating
regions. The DUT is configured to transmit traffic (either
continuously or in burst mode) on each supported channel to a link
partner, which is then demodulated and decoded at the receiver. The
test is repeated for all supported regulatory domains. For each
supported regulatory domain, the DUT should be able to operate on
all specified channels. Comments on Test Results a. The DUT was
observed to support operation in North America on all defined
operating channels.
Test # Label Part(s) Result(s) a PASS 19.2.2 - CCK
Bits-to-Symbol Mapping b PASS
Comments on Test Procedure Purpose: To verify that the device
under test (DUT) correctly maps the raw data bits to complimentary
code keying (CCK) modulated symbols. Four modulation formats and
data rates are specified for HR/DSSS PHYs. The HR access rates are
based on the CCK modulation scheme for 5.5 Mbps and 11 Mbps. The
DUT is configured to transmit traffic (either continuously or in
burst mode) at 5.5 Mbps and 11 Mbps to a link partner, which is
then demodulated and decoded at the re-ceiver. a. The received
CRC-16 and CRC-32 values should be identical to the calculated
values. b. The transmitted PSDU data should be identical to the
received PSDU data. Comments on Test Results a. The CRC-16 and
CRC-32 values transmitted from the DUT were observed to be
identical to the calculated val-
ues obtained from the received frames. b. The decoded data
pattern received from the DUT was observed to be identical to the
original data pattern en-
coded by the DUT.
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 8 Report Rev. 1.0
Test # and Label Part(s) Result(s) a PASS 19.2.3 - Transmit
Power Level b Not Applicable
Comments on Test Procedure Purpose: To verify that the transmit
power level of the device under test (DUT) is within the
conformance limits. Even though ERP devices occupy the unlicensed
ISM band, regulatory bodies at the national level still govern
cer-tain emissions practices forcing observance of several
different power-level guidelines dependent upon geographical
location. The maximum allowable output power requirements for an
ERP device are established by these regional and national
regulatory administrations. Currently, the three defined bodies
consist of the United States, Europe, and Japan. The DUT is
configured to transmit traffic (either continuously or in burst
mode) at 11 Mbps and at maximum output power to a link partner,
from which the band-power of the signal is calculated. a. For a
given geographic region, the maximum output power should not exceed
the values specified in Tables 1
and 2, respectively. b. If the maximum output power level of the
DUT exceeds 100 mW, it should be capable of switching power
back
down to 100 mW or less. Comments on Test Results a. For each
supported region, the observed output power from the DUT was 96.286
mW. b. Since the maximum observed output power was below 100 mW,
this test was not performed. Test # and Label Part(s) Result(s)
19.2.4 - Spurious Emissions a PASS Comments on Test Procedure
Purpose: To verify if the device under test (DUT) is conformant
with in-band and out-of-band spurious emissions as set by
regulatory bodies. Wireless devices are made up of a number of
analog components and high-speed digital components. The overall
system emissions from a DUT are always a combination of emissions
from both of these types of components. These different
combinations of signals in the transmitter can cause spurious
signals. The DUT is configured to transmit continuously (in burst
most) on channel 1 using various data rates at maximum power, and
emissions are measured. The test is repeated for channels 6 and 11
at all supported data rates. Comments on Test Results a. The device
was observed to conform to spurious emissions requirements as per
FCC Part 15.247. See figures 1 - 2 for representative conformant
spurious emission spectral plots.
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 9 Report Rev. 1.0
Test # and Label Part(s) Result(s) 19.2.5 - ERP-DSSS Transmit
Spectral Mask a Refer to Comments Comments on Test Procedure
Purpose: To verify the direct sequence spread spectrum (DSSS)
transmit spectrum of the device under test (DUT) is within
conformance limits. Two different transmit spectrums are defined
dependant upon the desired modulation mode. The transmit spectral
mask for ERP-OFDM follows the spectral mask limits specified in
17.3.9.2, while for ERP-DSSS the mask limits are as specified in
18.4.7.3. The DUT is configured to transmit traffic (in burst mode)
using ERP-DSSS modulation at maximum output power for all supported
data rates, North American channels and short PLCP header format to
a link partner, from which the spectral mask is computed. The
transmitted spectral mask of the DUT should fall within the
conformance limits of Figure 18-19. Comments on Test Results a. The
transmitted spectral mask of the DUT was observed to fall outside
of the conformance limits at a data rate
of 1 Mbps on channels 1, 6, and 11; however, all other data
rates were found to properly conform to the spec-tral mask limits
on all tested channels. As the spectrum is built using the VSA
configured as a spectrum analyzer all time domain information is
lost. Therefore, the possibility exists that frames transmitted by
the DUT at data rates other than 1 Mbps were captured during test
execution that negatively influenced the shape of the spectrum.
Please see representative plots for each modulation type at the end
of this report (Figures 3 – 5).
Test # and Label Part(s) Result(s) 19.2.6 - ERP-OFDM Transmit
Spectral Mask a PASS Comments on Test Procedure Purpose: To verify
the orthogonal frequency division multiplexing (OFDM) transmit
spectrum of the device under test (DUT) is within conformance
limits. Two different transmit spectrums are defined dependant upon
the desired modulation mode. The transmit spectral mask for
ERP-OFDM follows the spectral mask limits specified in 17.3.9.2,
while for ERP-DSSS the mask limits are as specified in 18.4.7.3.
The DUT is configured to transmit traffic (in burst mode) using
ERP-OFDM modula-tion at maximum output power for all supported data
rates, North American channels and short PLCP header format to a
link partner, from which the spectral mask is computed. The
transmitted spectral mask of the DUT should fall within the
conformance limits of Figure I.1. Comments on Test Results a. The
transmitted spectral mask of the DUT was observed to fall within
the conformance limits. Please see repre-
sentative plots for each modulation type at the end of this
report (Figures 6 – 7).
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 10 Report Rev. 1.0
Test # and Label Part(s) Result(s) a PASS 19.2.7 - Transmit
Center and Symbol Clock Frequency Tolerance b PASS
Comments on Test Procedure Purpose: To verify that the center
frequency and symbol offset of the device under test (DUT) are
within the con-formance limits. When the transmit center frequency
is offset from the actual channel frequency, the spectrum of the
transmit signal falls in the adjacent channels, which causes
interference in the adjacent channels. To reduce overlap, the
transmit center and symbol clock frequency tolerances for ERP
devices should not exceed +/- 25 ppm.
Comments on Test Results
DSSS/CCK
Channel Data Rate (Mbps)
Peak Center Frequency Error
(ppm)
Symbol Clock Error (ppm)
1 1 0.605 -0.516 2 0.530 -0.284 5.5 0.615 -0.294 11 0.613
-0.315
6 1 0.685 -0.528 2 0.705 -0.470 5.5 0.677 -0.258 11 0.767
-0.393
11 1 0.626 -0.461
2 0.607 -0.370 5.5 0.662 0.093 11 0.711 -0.307
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 11 Report Rev. 1.0
OFDM
Channel Data Rate (Mbps)
Peak Center Frequency Error
(ppm)
Symbol Clock Error (ppm)
1 6 0.619 0.476 9 0.623 0.438 12 0.627 0.402 18 0.641 0.758 24
0.627 0.210 36 0.652 -0.048 48 0.637 -0.178 54 0.644 0.853
6 6 0.761 0.546 9 0.771 0.432 12 0.775 0.580 18 0.769 0.545 24
0.773 0.486 36 0.762 0.963 48 0.780 1.055 54 0.794 0.502
11 6 0.688 0.483 9 0.696 0.495 12 0.645 0.743 18 0.685 0.389 24
0.680 0.696 36 0.677 0.595 48 0.711 1.014 54 0.709 0.556
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 12 Report Rev. 1.0
Test # Label Part(s) Result(s) 19.2.8 - Transmit Power-on and
Power-down Ramp Timing a Refer to Comments Comments on Test
Procedure Purpose: To verify that the power-on and power–down ramp
time of the device under test (DUT) are within the conformance
limits. This measurement assesses the envelope of the carrier power
in the time domain. If the transmitter turns on too slowly then
data in the beginning might be lost. If it turns off too quickly,
the power spread into adjacent frequency channels increases. The
DUT is configured to transmit traffic (in burst mode) at maximum
output power for all sup-ported data rates. All measured power-on
and power-down times should be less than 2 µs. Comments on Test
Results a. Due to the modulation observed with the power-on event
and the power-off event, the exact value of the
power-on ramp time could not be conclusively shown to be less
than 2 µs.
Channel Data Rate Parameter Min Value Max Value Units
1 1 Power-on, Baseline to Pout 0.7955 0.7955 µs Power-off, Pout
to Baseline 0.8818 0.8818 µs 2 Power-on, Baseline to Pout (2.9511)
(2.9511) µs Power-off, Pout to Baseline (2.4068) (2.4068) µs 5.5
Power-on, Baseline to Pout 1.0023 1.0023 µs Power-off, Pout to
Baseline (465.2795) (465.2795) µs 11 Power-on, Baseline to Pout
1.0000 1.0000 µs Power-off, Pout to Baseline (2.9580) (2.9580)
µs
6 1 Power-on, Baseline to Pout 0.8364 0.8364 µs Power-off, Pout
to Baseline 1.5284 1.5284 µs 2 Power-on, Baseline to Pout 1.0000
1.0000 µs Power-off, Pout to Baseline (3.1477) (3.1477) µs 5.5
Power-on, Baseline to Pout 1.0011 1.0011 µs Power-off, Pout to
Baseline (291.2795) (291.2795) µs 11 Power-on, Baseline to Pout
1.0023 1.0023 µs Power-off, Pout to Baseline (4.2352) (4.2352)
µs
11 1 Power-on, Baseline to Pout 0.9557 0.9557 µs
Power-off, Pout to Baseline 1.3818 1.3818 µs 2 Power-on,
Baseline to Pout 1.0000 1.0000 µs Power-off, Pout to Baseline
(2.6966) (2.6966) µs 5.5 Power-on, Baseline to Pout 1.0011 1.0011
µs Power-off, Pout to Baseline (164.3875) (164.3875) µs 11
Power-on, Baseline to Pout 1.0023 1.0023 µs Power-off, Pout to
Baseline (5.4045) (5.4045) µs
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 13 Report Rev. 1.0
Test # Label Part(s) Result(s)
19.2.9 - RF Carrier Suppression a Not Applicable Comments on
Test Procedure Purpose: To verify that the RF carrier suppression
for the device under test (DUT) falls within the conformance
limits. This measurement assesses the transmit spectrum in the
frequency domain. As the actual RF carrier does not carry any
information, it is suppressed during transmission to decrease the
transmit power. The DUT is configured to transmit continuously with
the scrambler disabled. The carrier should be suppressed such that
the suppression at the center frequency is 15dB below the peak SIN
(x)/x spectrum. Comments on Test Results
a. Necessary access to disabling of the DUT’s scrambler was not
provided; therefore, this test could not be per-
formed.
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 14 Report Rev. 1.0
Test # and Label Part(s) Result(s) a PASS 19.2.10 – Transmit
Constellation Error b PASS
Comments on Test Procedure Purpose: To verify that the relative
constellation RMS error of the device under test (DUT) is within
the confor-mance limits. ERP devices are required to follow both
the DSSS/CCK transmit specifications of Clause 18, and the
orthogonal frequency division multiplexing (OFDM) transmit
specifications of Clause 17 with the exceptions listed in 19.4.7.
The constellation error can be measured directly from determining
the error vector magnitude (EVM) of the DUT. EVM is based on the
concept that any impaired signal can be represented as the sum of
an ideal signal and an error signal. Since an error signal cannot
be measured directly, test instrumentation determines the error
signal by recon-structing the ideal signal based on received data
and then subtracting it from the actual signal. a. For all
mandatory DSSS/CCK data rates and short PLCP header format, the
worst-case EVM should not ex-
ceed 35% during any 1000-chip sample. b. For all supported OFDM
data rates, the relative constellation error, RMS-averaged over 20
frames containing
at least 14 data symbols, and should not exceed the rate
dependent values listed in Table 3. Comments on Test Results a.
Please see figures 8 - 9 for representative figures from each
constellation size. b. Please see figures 10 – 13 for
representative figures from each constellation size.
DSSS/CCK
Channel Data Rate
(Mbps) EVM (dB)
EVM (%)
1 1 -28.1920 3.8940 2 -31.0197 2.8120 5.5 -30.5428 2.9707 11
-30.7799 2.8907
6 1 -29.1989 3.4678 2 -32.4015 2.3984 5.5 -30.7092 2.9143 11
-34.1941 1.9512
11 1 -28.2188 3.8820
2 -30.5009 2.9851 5.5 -33.0633 2.2225 11 -35.4488 1.6887
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 15 Report Rev. 1.0
OFDM
Channel Data Rate
(Mbps) EVM (dB)
EVM (%)
1 6 -28.7823 3.6382 9 -28.3143 3.8396 12 -29.0247 3.5381 18
-27.2916 4.3194 24 -28.1334 3.9204 36 -27.6748 4.1330 48 -27.7654
4.0900 54 -27.3373 4.2967
6 6 -28.3848 3.8085 9 -27.3699 4.2806 12 -28.5619 3.7317 18
-28.6697 3.6857 24 -29.4734 3.3599 36 -27.5229 4.2059 48 -29.7666
3.2484 54 -32.2920 2.4289
11 6 -29.3243 3.4181
9 -28.2969 3.8473 12 -27.2890 4.3206 18 -29.0355 3.5337 24
-27.5647 4.1857 36 -27.7574 4.0938 48 -28.3492 3.8242 54 -29.4606
3.3649
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ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 16 Report Rev. 1.0
Test # and Label Part(s) Result(s) a PASS 19.2.11 – OFDM
Training Symbol Spectral Flatness b PASS
Comments on Test Procedure Purpose: To verify that the transmit
spectral flatness of the device under test (DUT) falls within the
conformance limits. For 802.11 OFDM devices, the output RF filter
at the transmitter should assure that all sub-carriers are
transmitted as close to an equivalent energy level as possible.
This is formally specified in Clause 17.3.9.6.2, along with the
ac-ceptable deviation limits specified below. Spectral flatness
should be measured by observing the channel estimation sequence,
specifically the long training sequence, where all carriers are
present at equal transmit level. a. Spectral Lines from carriers
–16 to –1 and +1 to +16 should deviate no more than ±2 dB from
their average
energy b. Spectral Lines from carrier –26 to –17 and +17 to +26
should deviate no more than +2/-4dB from their aver-
age energy Comments on Test Results a. Spectral Lines from
carriers –16 to –1 and +1 to +16 were observed to deviate no more
than ±2 dB from their
average energy. b. Spectral Lines from carrier –26 to –17 and
+17 to +26 were observed to deviate no more than +2/-4dB from
their average energy. Please see figures 14 - 16 for
representative plots of spectral flatness.
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 17 Report Rev. 1.0
Test # Label Part(s) Result(s) a Not Applicable b Not
Applicable
19.2.12 - Clear Channel Assessment Functionality c Not
Applicable Comments on Test Procedure Purpose: To verify the device
under test (DUT) correctly implements Clear Channel Assessment
functionality for determining the state of the wireless channel.
The CCA mechanism allows each station to regulate controlling
access to the medium such that two devices do not attempt to
acquire the medium simultaneously. For each threshold level, the
CCA should be held low before the end of slot time when a valid
signal is present at the receiver within 5 µs of the start of a MAC
slot boundary. Addition-ally, when loss of CS occurs in the middle
of reception of a valid PLCP header, the CCA should be held low for
the duration of the transmitted PPDU. Comments on Test Results a-c.
The DUT did not provide a mechanism for monitoring the CCA value;
therefore, this test could not be per-
formed.
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 18 Report Rev. 1.0
0.5 1 1.5 2 2.5
x 104
−70
−60
−50
−40
−30
−20
−10
0
Spurious Emissions − 2437 MHz, 100KHz RBW, 300KHz VBW
Frequency − MHz
Pow
er −
dB
FCC−15.247(c) Conducted LimitsMeasured Spectrum
Figure 1 - Spurious Emissions – Channel 6
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 19 Report Rev. 1.0
0.5 1 1.5 2 2.5
x 104
−70
−60
−50
−40
−30
−20
−10
0
Spurious Emissions − 2462 MHz, 100KHz RBW, 300KHz VBW
Frequency − MHz
Pow
er −
dB
FCC−15.247(c) Conducted LimitsMeasured Spectrum
Figure 2 - Spurious Emissions - Channel 11
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 20 Report Rev. 1.0
−50 0 50−60
−50
−40
−30
−20
−10
0
10Spectral Mask − CH:1, 1.0 Mbps
Frequency from Carrier − MHz
Pow
er −
dB
Figure 3 - DSSS Spectral Mask – DBPSK – Channel 1
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 21 Report Rev. 1.0
−50 0 50−80
−70
−60
−50
−40
−30
−20
−10
0
10Spectral Mask − CH:6, 1.0 Mbps
Frequency from Carrier − MHz
Pow
er −
dB
Figure 4 - DSSS Spectral Mask – DBPSK – Channel 6
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 22 Report Rev. 1.0
−50 0 50−80
−70
−60
−50
−40
−30
−20
−10
0
10Spectral Mask − CH:11, 11.0 Mbps
Frequency from Carrier − MHz
Pow
er −
dB
Figure 5 - DSSS Spectral Mask – CCK – Channel 11
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 23 Report Rev. 1.0
−50 0 50−80
−70
−60
−50
−40
−30
−20
−10
0
10Spectral Mask − CH:6, 6.0 Mbps
Frequency from Carrier − MHz
Pow
er −
dB
Figure 6 - OFDM Spectral Mask - BPSK – Channel 6
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 24 Report Rev. 1.0
−50 −40 −30 −20 −10 0 10 20 30 40 50−60
−50
−40
−30
−20
−10
0
10Spectral Mask − CH:11, 54Mbps
Frequency from Carrier − MHz
Pow
er −
dB
Figure 7 - OFDM Spectral Mask - 64-QAM – Channel 11
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 25 Report Rev. 1.0
−1.5 −1 −0.5 0 0.5 1 1.5−1.5
−1
−0.5
0
0.5
1
1.5
In−phase
Qua
drat
ure
I−Q Constellation − Channel 1, 1 Mbps, EVM −29.0654 dB
MeasuredIdealLimit
Figure 8 - Transmit Constellation - DBPSK – Channel 1
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 26 Report Rev. 1.0
−1.5 −1 −0.5 0 0.5 1 1.5−1.5
−1
−0.5
0
0.5
1
1.5
In−phase
Qua
drat
ure
I−Q Constellation − Channel 6, 11 Mbps, EVM −33.9192 dB
MeasuredIdealLimit
Figure 9 - Transmit Constellation - CCK – Channel 6
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 27 Report Rev. 1.0
−2 −1 0 1 2−2
−1.5
−1
−0.5
0
0.5
1
1.5
2
In−phase
Qua
drat
ure
I−Q Constellation − Channel 11, 6 Mbps, EVM −21.8854 dB
MeasuredIdealLimit
Figure 10 - Transmit Constellation - BPSK – Channel 11
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 28 Report Rev. 1.0
−1.5 −1 −0.5 0 0.5 1 1.5−1.5
−1
−0.5
0
0.5
1
1.5
In−phase
Qua
drat
ure
I−Q Constellation − Channel 1, 12 Mbps, EVM −21.8854 dB
MeasuredIdealLimit
Figure 11 - Transmit Constellation - QPSK - Channel 1
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 29 Report Rev. 1.0
−1.5 −1 −0.5 0 0.5 1 1.5−1.5
−1
−0.5
0
0.5
1
1.5
In−phase
Qua
drat
ure
I−Q Constellation − Channel 1, 24 Mbps, EVM −21.8854 dB
MeasuredIdealLimit
Figure 12 - Transmit Constellation - 16-QAM – Channel 1
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 30 Report Rev. 1.0
−1.5 −1 −0.5 0 0.5 1 1.5−1.5
−1
−0.5
0
0.5
1
1.5
In−phase
Qua
drat
ure
I−Q Constellation − Channel 11, 54 Mbps, EVM −21.8854 dB
MeasuredIdealLimit
Figure 13 - Transmit Constellation - 64-QAM – Channel 11
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 31 Report Rev. 1.0
−20 −10 0 10 20−6
−5
−4
−3
−2
−1
0
1
2
3Spectral Flatness Test Results − CH:1, Rate: 6 Mbps
SubCarrier Number
Rel
ativ
e P
ower
− d
B
Figure 14 - Spectral Flatness - Channel 1
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 32 Report Rev. 1.0
−20 −10 0 10 20−6
−5
−4
−3
−2
−1
0
1
2
3Spectral Flatness Test Results − CH:6, Rate: 6 Mbps
SubCarrier Number
Rel
ativ
e P
ower
− d
B
Figure 15 - Spectral Flatness - Channel 6
-
ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g
Wireless STA
Wireless LAN Consortium 33 Report Rev. 1.0
−20 −10 0 10 20−6
−5
−4
−3
−2
−1
0
1
2
3Spectral Flatness Test Results − CH:11, Rate: 6 Mbps
SubCarrier Number
Rel
ativ
e P
ower
− d
B
Figure 16 - Spectral Flatness - Channel 11
Cover LetterCover LetterDigital Signature InformationGROUP 1:
PLCP Tests19.1.1 - Transmit and Receive Supported Data Rates19.1.2
- DSSS Long Preamble and Header Format19.1.3 - DSSS Short Preamble
and Header Format19.1.4 - ERP SERVICE Field Bit Verification
GROUP 2: PMD Transmit Tests19.2.1 - Operating Channel
Capability19.2.2 - CCK Bits-to-Symbol Mapping19.2.3 - Transmit
Power Level19.2.4 - Spurious Emissions19.2.5 - ERP-DSSS Transmit
Spectral Mask19.2.6 - ERP-OFDM Transmit Spectral Mask19.2.7 -
Transmit Center and Symbol Clock Frequency Toleranc
ChannelData RateFrequency ErrorSymbol Clock ErrorSymbol Clock
Error19.2.8 - Transmit Power-on and Power-down Ramp TimingMin Value
Max Value
19.2.9 - RF Carrier Suppression19.2.10 – Transmit Constellation
Error19.2.11 – OFDM Training Symbol Spectral Flatness19.2.12 -
Clear Channel Assessment FunctionalityaNbN
2013-01-03T16:36:20-0500UNH-IOLI attest to the accuracy and
integrity of this document