Wireless LAN Consortium - UNH InterOperability Laboratory...Wireless LAN Consortium ERP Physical Layer Test Suite v3.1 Report UNH InterOperability Laboratory — 121 Technology Drive,

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]

ERP Physical Layer Test Suite v3.1Report DUT: Network Switch 11g Wireless STA

Wireless LAN Consortium 2 Report Rev. 1.0

Digital Signature Information This document was created using an Adobe digital signature. A digital signature helps to ensure the authenticity of the document, but only in this digital format. For information on how to verify this document’s integrity proceed to the following site:

http://www.iol.unh.edu/certifyDoc/ If the document status still indicates “Validity of author NOT confirmed”, then please contact the UNH-IOL to con-firm the document’s authenticity. To further validate the certificate integrity, Adobe 6.0 should report the following fingerprint information:

MD5 Fingerprint: EEE1 7A82 7806 EB21 AF94 F189 E4BE 361B SHA-1 Fingerprint: ECFB 7FAF AB4A 0832 2408 E965 9F5C E3F2 D784 AAAB

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/



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.



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.



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.



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.



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.



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.



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).



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



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



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



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.



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



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



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.



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.



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



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



−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



−50 0 50−80

−70

−60

−50

−40

−30

−20

−10

0



Pow

er −

dB

Figure 4 - DSSS Spectral Mask – DBPSK – Channel 6



−50 0 50−80

−70

−60

−50

−40

−30

−20

−10

0



Pow

er −

dB

Figure 5 - DSSS Spectral Mask – CCK – Channel 11



−50 0 50−80

−70

−60

−50

−40

−30

−20

−10

0



Pow

er −

dB

Figure 6 - OFDM Spectral Mask - BPSK – Channel 6



−50 −40 −30 −20 −10 0 10 20 30 40 50−60

−50

−40

−30

−20

−10

0

10Spectral Mask − CH:11, 54Mbps


Pow

er −

dB

Figure 7 - OFDM Spectral Mask - 64-QAM – Channel 11



−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



−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


MeasuredIdealLimit

Figure 9 - Transmit Constellation - CCK – Channel 6



−2 −1 0 1 2−2

−1.5

−1

−0.5

0

0.5

1

1.5

2

In−phase

Qua

drat

ure


MeasuredIdealLimit

Figure 10 - Transmit Constellation - BPSK – Channel 11



−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


MeasuredIdealLimit

Figure 11 - Transmit Constellation - QPSK - Channel 1



−1.5 −1 −0.5 0 0.5 1 1.5−1.5

−1

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Figure 12 - Transmit Constellation - 16-QAM – Channel 1



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Figure 13 - Transmit Constellation - 64-QAM – Channel 11



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3Spectral Flatness Test Results − CH:1, Rate: 6 Mbps

SubCarrier Number

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Figure 14 - Spectral Flatness - Channel 1



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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

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Wireless LAN Consortium - UNH InterOperability Laboratory...Wireless LAN Consortium ERP Physical Layer Test Suite v3.1 Report UNH InterOperability Laboratory — 121 Technology Drive,