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| ???? ralink technology corporation 5f, no. 36, taiyuan st, jhubei city, hsinchu county, taiwan http://www.ralinktech.com.tw tel +886-3-560 0868 fax +886-3-560 0818 the content of this document is to be treated as strictly confidential and is not to be disclosed re-produced or used except as authorized in writing by ralink technology corp. 11n RT3070 usb test report approvals date checked by arvin/vincent/jason 2008/6/3 verified by gary 2008/6/6 approved by ls 2008/6/6 ? this report provides a sample unit measurement, which is not suitable and is prohibited to be used to setup mfg criteria? ? www.datasheet.co.kr datasheet pdf - http://www..net/
ralink RT3070u usb 1t1r test report system dept. page 2 of 32 table of contents 1. basic rf testing .................................................................................................................................. 6 1.1. t ransmit s pectrum m ask ................................................................................................................. 6 1.2. t ransmitter p ower ........................................................................................................................ 16 1.3. t ransmit s pectrum f latness ......................................................................................................... 18 1.4. evm ............................................................................................................................... ................... 20 1.5. t ransmit c enter f requency t olerance ....................................................................................... 22 1.6. c arrier s uppression ...................................................................................................................... 23 1.7. t ransmit p ower on r amp and p ower d own r amp t ime ................................................................ 25 1.8. r eceiver s ensitivity ....................................................................................................................... 27 1.9. r eceiver m aximum i nput l evel ....................................................................................................... 30 2. power consumption ........................................................................................................................ 32 www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 3 of 32 figures f igure 1- 1 t ransmit spectrum mask limitation for 11 n 20mh z ...................................................................... 6 f igure 1- 2 t ransmit s pectrum m ask l imitation for 11 n 40mh z ..................................................................... 6 f igure 1- 3 t ransmit spectrum mask limitation for 11 g .................................................................................. 6 f igure 1- 4 t ransmit spectrum mask limitation for 11 b ................................................................................... 7 f igure 1- 5 t ransmit s pectrum m ask t est s etup ............................................................................................ 7 f igure 1- 6 t ransmitter power test setup ..................................................................................................... 16 f igure 1- 7 t ransmit spectrum flatness test setup ...................................................................................... 18 f igure 1- 8 evm elements ............................................................................................................................... .20 f igure 1- 9 m odulation accuracy measurement example .............................................................................. 20 f igure 1- 10 evm test setup ........................................................................................................................... 20 f igure 1- 11 t ransmit center frequency tolerance test setup .................................................................. 22 f igure 1- 12 c arrier s uppression .................................................................................................................. 23 f igure 1- 13 t ransmit power - on ramp ............................................................................................................ 25 f igure 1- 14 t ransmit power - down ramp ....................................................................................................... 25 f igure 1- 15 t ransmit p ower r amp t est s etup ............................................................................................. 25 f igure 1- 16 r eceiver s ensitivity t est s etup ................................................................................................ 27 f igure 1- 17 r eceiver maximum i nput l evel test s etup ................................................................................. 30 www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 4 of 32 tables t able 1- 1 11 n 20mh z mode output spectrum test results ............................................................................. 8 t able 1- 2 11 n 40mh z mode output spectrum test results ........................................................................... 10 t able 1- 3 11 g mode output spectrum test results ....................................................................................... 12 t able 1- 4 11 b mode output spectrum test results ....................................................................................... 14 t able 1- 5 t ransmitter power test results @ 25 ...................................................................................... 17 t able 1- 6 802.11 g transmit spectrum flatness test results ....................................................................... 19 t able 1- 7 802.11 n 20mh z transmit spectrum flatness test results ........................................................... 19 t able 1- 8 802.11 n 40mh z transmit spectrum flatness test results ........................................................... 19 t able 1- 9 evm test results ............................................................................................................................ 21 t able 1- 10 11 g t ransmit c enter f requency t olerance t est r esult ......................................................... 22 t able 1- 11 11 n t ransmit c enter f requency t olerance t est r esult .......................................................... 22 t able 1- 12 11 n 20mh z c arrier suppression test results ............................................................................ 24 t able 1- 13 11 n 40mh z c arrier suppression test results ............................................................................ 24 t able 1- 14 11 g transmitting power - on ramp test result ............................................................................. 26 t able 1- 15 11 g transmitting power - down ramp test result ........................................................................ 26 t able 1- 16 r eceiver sensitivity test results ................................................................................................ 28 t able 1- 17 receiver maximum input level test results ................................................................................. 31 www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 5 of 32 ? dut information dut information h/w mac/bbp: RT3070 rf: RT3070 interface: usb external lna: 3 na pa: 2.4ghz rtc6681 pa+lna: na tx: 1 front end type: rx: 1 other: s/w driver version: qa RT3070 v1.0.0.1 utility version: not ready other parameter: default chipset information type mac/bbp/ transceiver board information part number RT3070l v ?? rw-1x1 lot number pa89270e0 date code 0821ste dut figure www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 6 of 32 1. basic rf testing 1.1. transmit spectrum mask ? purpose to verify the transmitter spectrum of the device under test (dut) is below conformance limit. figure 1- 1 3 transmit spectrum mask limitation for 11n 20mhz figure 1- 2 3 transmit spectrum mask limitation for 11n 40mhz figure 1- 3 3 transmit spectrum mask limitation for 11g www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 7 of 32 figure 1- 4 transmit spectrum mask limitation for 11b ? equipment 1. spectrum analyzer 2. qa test. ? test environment figure 1- 5 transmit spectrum mask test setup ? procedure 1. configure the hardwar e setup as figure 1-5. 2. select test channel and set ?cont i. tx? from the qa test utility. 3. record the transmit spectrum mask from spectrum analyzer. ? pass criteria 1. for transmitted spectral mask for 11n 20mhz shall be less than ?45dbr for fc?30mhz ralink RT3070u usb 1t1r test report system dept. page 9 of 32 ch 1 mcs0 pass ch 7 mcs0 pass ch 13 mcs0 pass * cable lose = 3db www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 10 of 32 table 1- 2 11n 40mhz mode output spectrum test results channel test records on spectrum analyzer result ch 3 mcs7 pass ch 6 mcs7 pass ch 9 mcs7 pass www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 11 of 32 ch 3 mcs0 pass ch 6 mcs0 pass ch 9 mcs0 pass * cable lose = 3db www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 12 of 32 table 1- 3 11g mode output spectrum test results channel test records on spectrum analyzer result ch 1 54mbps pass ch 7 54mbps pass ch 13 54mbps pass www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 13 of 32 channel test records on spectrum analyzer result ch 1 6mbps pass ch 7 6mbps pass ch 13 6mbps pass * cable lose = 3db www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 14 of 32 table 1- 4 11b mode output spectrum test results channel test records on spectrum analyzer result ch 1 11mbps pass ch 7 11mbps pass ch 13 11mbps pass www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 15 of 32 channel test records on spectrum analyzer result ch 1 1mbps pass ch 7 1mbps pass ch 13 1mbps pass * cable lose = 3db www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 16 of 32 1.2. transmitter power ? purpose the test is to measure the device under test (dut) transmitter output power. ? equipment 1. spectrum analyzer 2. qa test ? test environment figure 1- 6 3 transmitter power test setup ? procedure 1. spectrum analyzer setup: rbw 100khz, vbw 100khz. 2. select test channel and set ?cont i. tx? from the qa test utility. 3. record the output power from spectrum analyzer. 4. repeat sequence 3 and 4 to measure tx power for other channels and operation modes. ? pass criteria 1. for 11n 20mhz as following table and based on the transmitted spectral mask less than ?45dbr for fc?30mhz ralink RT3070u usb 1t1r test report system dept. page 18 of 32 1.3. transmit spectrum flatness ? purpose to verify the transmit spectrum flatne ss of the device under test (dut). for 802.11a/g the average energy of the constellations in each of spectral lines ?16..-1 and +1..+16 will deviate no more than +/- 2db from their average energy. for 802.11n 40mhz mode, the average energy of the constellations in each of spectral lines ?42..-2 and +2..+42 will deviate no more than +/- 2db from their average energy. ? equipment 1. spectrum analyzer 2. qa test. ? test environment figure 1- 7 transmit spectrum flatness test setup ? procedure 1. spectrum analyzer setup: rbw 100khz, vbw 100khz. 2. select test channel and set ?conti nuous tx? from the qa test utility. 3. determine the pass/fail status of the out put spectrum observed from the spectrum analyzer. 4. repeat the test sequence 2 to 3. 5. measurement for data rate 54mbp s for 802.11a/g and mcs15 for 802.11n. ? pass criteria the transmitted spectral flatness should be with in +2/- 4db. www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 19 of 32 ? test result table 1- 6 802.11g transmit spectrum flatness test results channel test records on spectrum analyzer result ch 7 pass table 1- 7 802.11n 20mhz transmit spectrum flatness test results channel test records on spectrum analyzer result ch 7 pass table 1- 8 802.11n 40mhz transmit spectrum flatness test results channel test records on spectrum analyzer result ch 7 pass www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 20 of 32 1.4. evm ? purpose the test is to measur e the evm of the dut. the transmit modulation accuracy is measur ed using error vector magnitude (evm). evm is the magnitude of the phase difference as a function of time between an ideal reference signal and the measured transmitted signal. figure 1- 8 evm elements error vector magnitude (evm) and related quantities figure 1- 9 modulation accuracy measurement example ? equipment 1. vector signal analyzer 2. qa test. ? test environment figure 1- 10 evm test setup ? procedure 1. connect dut rf out to vector signal analyzer. 2. use qa test utility to control dut send packet. www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 21 of 32 3. measure the dut?s evm fr om vector signal analyzer. ? test result: table 1- 9 evm test results 11b mode: unit in % mode rate ch 1 ch 7 ch 13 1mbps 4.1 3.8 4.0 2mbps 4.1 3.9 4.0 5.5mbps 4.2 4..3 4.3 11b cck 11mbps 4.2 3.9 4.2 11g mode: unit in db mode rate ch 1 ch 7 ch 13 6mbps -26.3 -26.7 -25.3 18mbps -25.5 -26.2 -25.4 36mbps -29.8 -30.6 -29.1 11g ofdm 54mbps -31.5 -31.6 -32.0 11n 20mhz mode: unit in db mode rate ch 1 ch 7 ch 13 mcs0 -24.9 -25.5 -23.4 mcs3 -26.2 -26.8 -26.2 mcs5 -29.4 -29.6 -29.3 11n 20mhz mcs7 -31.3 -31.8 -31.2 11n 40mhz mode: unit in db mode rate ch 3 ch 6 ch 9 mcs0 -26.7 -26.2 -24.8 mcs3 -26.0 -25.5 -24.4 mcs5 -28.7 -27.8 -27.0 11n 40mhz mcs7 -30.0 -29.8 -29.9 www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 22 of 32 1.5. transmit center frequency tolerance ? purpose to verify the transmitter ( dut) central frequency offset is within the specified limits. ? equipment 1. spectrum analyzer 2. qa test. ? test environment figure 1- 11 transmit center frequency tolerance test setup ? procedure 1. select channel and click carrier test (wit hout modulation) from the qa test utility. 2. measure and record frequency tolerance from the spectrum analyzer. 3. repeat the test sequence 1 to 2 for other channels measurement. ? pass criteria the transmitted center frequency tole rance shall be 20 ppm maximum. ? test result: temperature @ 25 table 1- 10 11g transmit center frequency tolerance test result channel ch7 result (ppm) 2.25 frequency tolerance 5.5khz pass/fail pass table 1- 11 11n transmit center frequency tolerance test result channel ch7 result (ppm) 2.17 frequency tolerance 5.3khz pass/fail pass www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 23 of 32 1.6. carrier suppression ? purpose the test is to verify rf carrier suppression of the dut. 802.11b: the rf carrier suppression, measured at the channel center frequency, shall be at least 15 db below the peak sin(x)/x power spectrum. 802.11g: the leakage of the center frequency component shall not exceed -15 db relative to overall transmitted power or, equivalently, +2 db relative to the average energy of the rest of the sub-carriers. 802.11n: ? for all 20 mhz modes of transmission the leakage of the center frequency component shall not exceed -15 db relative to overall transmitted power or, equivalently, +2 db relative to the average energy of the rest of the sub-carriers. ? for all 40 mhz modes of transmission the center frequency leakage shall not exceed -18 db relative to overall transmitted power, or, equivalently, +2 db relative to the average ener gy of the rest of the sub-carriers. ? equipment 1. spectrum analyzer 2. qa test. ? test environment figure 1- 12 carrier suppression ? procedure 1. dut generate frame by the qa test that send the rf si gnal to spectrum analyzer. 2. determine the pass/fail status of the out put spectrum observed from the spectrum analyzer. 3. repeat the test sequence 1 to 2 for other channels. ? pass criteria ? delta > 15db for b, g & 11n 20mhz ? delta > 18db for 11n 40mhz www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 24 of 32 ? test result table 1- 12 11n 20mhz carrier suppression test results channel test records on spectrum analyzer result ch 7 28.3db table 1- 13 11n 40mhz carrier suppression test results channel test records on spectrum analyzer result ch 7 24.17db www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 25 of 32 1.7. transmit power on ramp and power down ramp time ? purpose to verify the power-on and power?down ramp ti me of the device under test (dut) are within the conformance limits. figure 1- 13 transmit power-on ramp figure 1- 14 transmit power-down ramp ? equipment 1. vector signal analyzer 2. qa test. ? test environment figure 1- 15 transmit power ramp test setup ? procedure 1. dut generate frame by test utility whic h send the rf signal to vector signal analyzer. 2. vsa setup on the time domain. 3. measure the results fr om vector signal analyzer. 4. repeat the test sequence 1 to 3 for other channels. ? pass criteria 1. the transmitting power-on ramp for 10% to 90% of maximum power m shall be no greater than 2 s. 2. the transmitting power-down ramp for 90% to 10% of maximum power shall be no www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 26 of 32 greater than 2 s. ? test result table 1- 14 11g transmitting power-on ramp test result channel test records on vector signal analyzer result ch 7 923.29ns table 1- 15 11g transmitting power-down ramp test result channel test records on vector signal analyzer result ch 7 1.17us www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 27 of 32 1.8. receiver sensitivity ? purpose to verify receiver minimu m input level of the dut. ? equipment 1. vector signal generator 2. qa test ? test environment figure 1- 16 receiver sensitivity test setup ? procedure 1. set vsg to generate psdu length as following: ? 1024 octets for 11b/g measurement ? 4096 octets for 11n measurement. 2. reduce vsg output power until t he following fer is occurred. ? 10% for 802.11n ? 8% for 802.11g/b ? pass criteria for 802.11n modulation coding rate (r) adjacent channel rejection (db) alternate adjacent channel rejection (db) minimum sensitivity (dbm) (20 mhz channel spacing) minimum sensitivity (dbm) (40 mhz channel spacing) bpsk 1/2 16 32 -80 -77 qpsk 1/2 13 29 -77 -74 qpsk 3/4 11 27 -75 -72 16-qam 1/2 8 24 -72 -69 16-qam 3/4 4 20 -68 -65 64-qam 2/3 0 16 -64 -61 64-qam 3/4 -1 15 -63 -60 64-qam 5/6 -2 14 -63 -59 www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 28 of 32 ? test result table 1- 16 receiver sensitivity test results 11b mode: 1rx result (dbm) rate ch1 ch11 ch13 1m -91 -91 -91 2m -91 -91 -91 5.5m -90 -90 -90 11b 11m -88 -88 -88 11g mode: 1x result (dbm) rate ch1 ch11 ch13 6m -89 -88 -88 9m -88 -87 -87 12m -86 -85 -85 18m -83 -83 -83 24m -81 -81 -80 36m -78 -78 -77 48m -74 -73 -73 11g 54m -72 -72 -72 11n 20mhz mode: 1x result (dbm) rate ch1 ch7 ch13 mcs0 -87 -87 -86 mcs1 -85 -84 -84 mcs2 -82 -82 -81 mcs3 -80 -80 -79 mcs4 -77 -76 -76 mcs5 -72 -72 -72 mcs6 -71 -70 -70 11n 20mhz mcs7 -69 -69 -68 11n 40mhz mode: 1rx www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 29 of 32 result (dbm) rate ch3 ch6 ch9 mcs0 -83 -83 -83 mcs1 -81 -81 -81 mcs2 -78 -78 -78 mcs3 -76 -76 -76 mcs4 -72 -72 -72 mcs5 -69 -69 -68 mcs6 -67 -66 -66 11n 40mhz mcs7 -64 -63 -63 www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 30 of 32 1.9. receiver maximum input level ? purpose to verify receiver maximu m input level of the dut. ? test equipment 1. vector signal generator 2. qa test ? test environment figure 1- 17 receiver maximum input level test setup ? procedure 1. set vsg to generate psdu length as following: standard psdu length (bytes) fer (%) rate (mbit/s) required max input level 802.11 1024 8 1, 2 -4 dbm 802.11b 1024 8 11, 5.5 -10 dbm 802.11g 1000 10 6, 9, 12, 18, 24, 36, 48, 54 -20 dbm 802.11a 1000 10 6, 9, 12, 18, 24, 36, 48, 54 -30 dbm 802.11n 1000 10 for any baseband modulation -30 dbm 2. raising the vsg output power until the fe r value listed in above table is occurred. www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 31 of 32 ? test result table 1- 17 receiver maximum input level test results output power (dbm) rate pass criteria (dbm) ch1 ch7 ch11 result 1m > -4 0 0 0 pass 11m >-10 0 0 0 pass 6m >-20 0 0 0 pass 54m >-20 -4 -4 -3 pass mcs0 >-30 -1 0 0 pass mcs7 >-30 -20 -20 -19 pass www.datasheet.co.kr datasheet pdf - http://www..net/ ralink RT3070u usb 1t1r test report system dept. page 32 of 32 2. power consumption table 2- 1 power consumption mode status current (ma) @5v note idle 89 117 54mbps,ch1 117 mcs15, 20mhz,ch1 rx 137 mcs15, 40 mhz,ch3 173 11mbps @ 17dbm,ch1 155 54mbps @ 13.9dbm, 11g,ch1 155 mcs7, 20mhz,14db,ch1 qa tx 166 mcs7, 40mhz,ch7 l ink (s0) 102(20m)/120(40m) 113 20mhz rx 144 40 mhz 148 20mhz tx 152 40 mhz suspend 2 unconfigured 59 52 dtim=100ms power save mode 47 dtim=300ms os r adio o ff 52 www.datasheet.co.kr datasheet pdf - http://www..net/ |
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