描述
1756-L72
變頻器輸出基波及諧波等測試均基于傅里葉變換，保證傅里葉變換精度的一個主要條件就是整周期截斷，也就是說，參與傅里葉變換的數(shù)據(jù)應(yīng)該是整數(shù)個信號周期對應(yīng)的數(shù)據(jù)。目前市面上大部分測量儀器做不到這一點，其后果是測量數(shù)據(jù)波動大，測量精度無法保障。另外，由于變頻器輸出諧波頻率較高，被測信號帶寬較寬，根據(jù)采樣定理，要求采樣頻率高于信號帶寬的兩倍。若信號帶寬為50kHz，采樣頻率必須高于100kHz。假設(shè)基波頻率為1Hz，這樣，在整周期截斷的要求下，至少分析1S（一個信號周期）的數(shù)據(jù)，而1S的數(shù)據(jù)量為100k點，即傅里葉變換的點數(shù)為100k點。一般測量儀器的處理器無法處理這么大量的數(shù)據(jù)，運算速度也跟不上，因此，實際測量中往往通過降低采樣頻率來減少傅里葉變換點數(shù)，而降低采樣頻率之后，為了不違背采樣定理，只能在被測信號輸入側(cè)加抗混疊濾波器，這樣一來，傅里葉變換可以正常進行，基波可以準確獲取，但是，被測信號的高次諧波被抑制了，不能滿足變頻器輸出諧波測量的需要。
產(chǎn)品承諾：
保?證?全新原裝進口,
保?證?安全準時發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌：ABB???,AB??,GE,FOXBORO,本特利，英維思，伍德沃德，西屋，瑞恩，施耐德，西門子，摩托羅拉，安川。力士樂。ACSO，橫河等進口品牌。 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA ? 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家
GIGATRONICS 8542 Dual Channel Power Meter – 40 GHz
AGILENT HP 83000 VLSI E2784-66503 B13545 PDPS CAL BOARD
AGILENT HP 83000 VLSI E2784-66503 C-6315 PDPS CAL BOARD
AGILENT HP 83000 VLSI E7179A SDSP CPU / CDU SWI D-3803
AGILENT HP 83000 VLSI E2803-66501 A 3407 A-3424
*LOT* SENSARRAY RESISTANCE CALIBRATION STANDARD KIT
SENSARRAY 1840A-8-5030 PROCESS PROBE INSTRUMENTED WAFER
SENSARRAY 1840A-8-5004 PROCESS PROBE INSTRUMENTED WAFER
AGILENT / HP 54112D DIGITIZING OSCILLOSCOPE 100MHz 4 CH
MAURY MOUNTZ UTICA TORQUE WRENCH / DRIVER / BREAK-OVER
Full lot of 24 various assortted wrenches!
CENCO Cat No. 92003 MEGAVAC Vacuum Pump 1/3 HP Motor
HP / AGILENT 33311-60050 SWITCH
***LOT OF 7 SWITCHES***
SOLOMAT MPM500E THERMOCOUPLE, HYGROMETER, TEMP PRESSURE
x2 AGILENT HP E5385A High Density Samtec Probe Adaptor
HP 9000 SERIES 9144 16-TRACK CARTRIDGE TAPE DRIVE
AGILENT / HP 8657B Synthesized Signal Generator 2060MHz
TEKTRONIX HFS9003 STIMULUS MAINFRAME SYSTEM *PARTS*
AGILENT / HP 54602B OSCILLOSCOPE 150MHz + 1CM Rackmount
**Unit has been TESTED & comes with 14-Day WARRANTY!!!
AGILENT / HP 8657B Synthesized Signal Generator 2060MHz
GASTECH GT Series Portable Gas Monitor Tester Meter C02
ANRITSU Model 560-7N50B RF Detector 10 MHz to 20 GHz
TEKTRONIX TG501 SG502 SG503 TIME MARK SINE WAVE GEN OSC
ASCOR 3000-47 Dual VXI Switch Matrix Module # 90400800
Quinstar QNS Series 26.5 – 40 GHz NOISE SOURCE
R&S OPTION B20 MODULATION CODER UPGRADE BOARD
HP AGILENT 6024A DC POWER SUPPLY OPT 100, 0-50V, 0-10A
AGILENT / HP 6427B DC POWER SUPPLY, 0-20V / 0-15A
GENERAL INSTRUMENTATION RF Power Measurement Head 3000W
PMH 13/3000 Frequency: 13.56 MHz-5 kHz
GIGATRONICS 8541C POWER METER w/ CABLE + OPTION 013
IFI LEVELING PREAMPLIFIER LPA-3B, 500MHz / 1 GHz
IFI LEVELING PREAMPLIFIER LPA-3A, 500 MHz / 1 GHz
Lucas Labs Reference Assembly OVDS-7010 VDS CAT TOOL x2
Waters Torque Watch ( TorqueWatch ) Model 940-2
BIRD 4021 DIRECTIONAL POWER SENSOR / 0.3 – 1000 Watts
*Tested w/ 7 Day ROR Warranty*
TEKTRONIX 2465 Analog Benchtop Oscilloscope 300MHz 4CH
BNC 625 625AT FUNCTION GENERATOR DC – 21.5 MHz vs. HP
ARBITRARY WAVEFORM FUNCTION GENERATOR w/ 7-Day Warranty
GIGATRONICS 8541C POWER METER 100KHz – 4GHz + OPTION 01
Tested & Fully Operational with 14-Day Warranty!!!
FLUKE 343A DC VOLTAGE CALIBRATOR 7-Digit 4-Terminal Out
Delta Electronics CQS-4 C-QUAM Synthesizer / Generator
BOONTON 51075 DIODE POWER SENSOR 18GHz 50Ω *PAIR of 2*
AGILENT / HP 6033A PROGRAMMABLE SYSTEM DC POWER SUPPLY
BNC 625 625A FUNCTION GENERATOR DC – 21.5 MHz vs. HP
ARBITRARY FUNCTION WAVEFORM GENERATOR w/ 7 Day Warranty
MARK-10 SERIES MG MG10 DIGITAL FORCE GAUGE / 500lbs
SORENSEN A12-1624 Center-Mike Hole Gage + Boster Bar
ELLSTROM Gage Block Set 92 peice, Accuracy “I”
BIRD 4021 DIRECTIONAL POWER SENSOR / 0.3 – 1000 Watts
R&S OPTION B50 Fast CPU Upgrade for SMIQ Series SIG GEN
ADVANTEST R6144 / TR6142 DC VOLTAGE CURRENT / GENERATOR
AGILENT / HP 75000 SERIES B HP E1301A W/ MODULES
HP Agilent 438A Dual Channel Power Meter + OPT 002
AGILENT / HP 1662A 68 CHANNEL PORTABLE LOGIC ANALYZER
OLYMPUS ILV-2 OES XENON LIGHT SOURCE
APPLICOS MEASUREMENT & CONTROL ATX7002 / ATX-7002
HP 85033-660014 3.5mm FEMALE SHORT (8753E Calibration)
STARRETT WEBBER GRADE 2 GAGE BLOCKS 1-100MM # RS45MA1
專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊
PLC模塊，可編程控制器，CPU模塊，IO模塊，AI模塊，通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅
15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家
18150087953 點擊撥打電話聯(lián)系我們