系统选用流水线形式进行连接,与信号流方向一致,具有很高的效率,时延短,处理数率高,可以一定程度上弥补GPP信号处理速度慢的不足。但是由于各模块之间采用实际电路互联,模块间耦合紧密,***程度不高。如果系统功能改变,需要增加、去除或修改某一模块,牵扯到相应的模块变动,甚至总体结构的改变。因为设计目的是针对测试系统信号源的测试和校准,信号相对固定,不需要频繁变动,所以选用流水式结构,结构框图如图2所示。信号的产生和处理由工控机完成,任意波形发生模块(Arbitrary W***eform Generator,AWG)实现波形输出(高频时需要用到数字上变频卡),如果做无线发射和接收时需要附加天线和射频放大器。信号的采集和数模转换由凌华科技PCI-9846高速数字化仪完成,转换结果可以实时显示,也可以保存成波形文件以便后续处理。
中频信号用PXI-5421产生。这是一款可进行板载信号处理(OSP)的任意波形发生器,具有16位分辨率和-91 dBc封闭式无寄生动态范围(SFDR),可为要求数字上变频和基带插值的应用提供仪器质量标准。作为一款功能齐全的AWG,PXI-5421还能够生成通用的电子测试信号,其***大输出范围为12Vpp,50Ω电阻载荷,***高频率43MHz。上变频卡采用NI PXI-5610,其内有2.7 GHz上变频器,具有高实时带宽和稳定的时基,其精度可达&plu***n;50ppb。在射频生成应用中,与模块化函数发生器紧密集成,可产生频率范围50kHz到2.7GHz的信号,可调增益范围130dB。PXI-5421产生高频VOR信号送至PXI-5610做上变频处理,变频到需要的甚高频波段。
PXI板卡安装在NI PXI-1402控制箱内。采用NI PXI-PCI833x 套件,可使用通过铜缆连接的完全透明的MXI-4网络在计算机上控制PXI模块。MXI-4通过在PCI-PCI高带宽连接上搭建桥路,通过计算机的PCI接口对PXI系统进行远程控制。
用凌华科技PCI-9846高速数字化仪完成数据采集。凌华科技PCI-9846是具有40MHz采样频率的16位4通道数字化仪,专为高频率、大动态范围信号设计,***高输入频率可达20MHz。模拟输入量程可以通过软件设定为&plu***n;1V或&plu***n;0.2V,可选择50欧输入阻抗,以适应高速、高频信号。装有4通道高线性16位A/D转换器,可以理想地适应诸如雷达、超声波及软件无线电等大动态范围信号。
ASCO 8314G41 *USED*
CONTROLS CORP. H43123-M7 *USED*
ABSOLUTE PROCESS INSTRUMENTS API1220 *USED*
TURCK T18XSD1LPQ-6178?3 *USED*
ASCO 8316G54 *USED*
ABLSURSUM MA16U CIRCUIT BREAKER *USED*
REGENT ER510 *USED*
BANNER Q45BB67FQ5 *USED*
JOHNSON CONTROLS V-6135-1 *USED*
SCHRADER AUTOMATION PRODUCTS 524211000 *USED*
MARATHON 1432555 *USED*
EFECTOR TT5050 *USED*
SQUARE D 2183-S44-Q304 *USED*
STI 44512-06550 CABLE *USED*
TELEMECANIQUE XS7-H10PA340 *USED*
OMRON E2E-X10E1 *USED*
BALLUFF BES 516-326-B0-C *USED*
ADVANCE AUTOMATION 11/2 MP-2DC 3 STROKE *USED*
UNITED ELECTRIC J400-164 *USED*
BANNER 2L1 *USED*
OHMITE D-96914 *USED*
UNIVERSAL PARTS HR 54RQ 175 *USED*
MAC 45AAA1DAAA1CM *USED*
TA296 220V *USED*
FACTS ENGINEERING FA-REC3 *NEW OUT OF A BOX*
ORMEC QTG910 PC BOARD *USED*
LUTZE DG 3-10-0,5M *USED*
GOULD 69171 *USED*
ITT 6000-04 *USED*
LOT OF 2 HOLJERON ZONELINK CONTROLLER ZL-***01-D *USED*
ANTUNES CONTROLS 8221210034 *USED*
LOT OF 2 DECCO 9-86-056 COIL *USED*
PCB LOAD CELL 203M22 *NEW*
MURR ELEKTRONIK 51120 *USED*
LOGICAL DEVICES INC. SHOOTER EE/EPROM PROGRAMMER RS232 ...
LOT OF 4 MAC VALVE 180027 *NEW*
EDWA*** 5530BHV-Y6 *NEW IN A BOX*
ATLAS COPCO POWER FOCUS 2101-S7-115R *NICE*
PHOTOSWITCH 47CN4 MODEL 1005 PHOTO ELECTRIC SENSOR *USE...
EDWA*** 5530BHV-Y6 *NEW OUT OF BOX*
FISHER 2U219533272 *NEW IN A BOX*
PYRONICS PS-0 *NEW IN A BOX*
MAC VALVE INC. 45A-AA1-DDAJ-1K?D SOLENOID VALVE *NEW IN ...
CUTLER-HAMMER CIRCUIT BREAKER HMCP003A0C *USED*
PLC DIRECT D2-16ND3-2 INPUT MODULE *USED*
BARKSDALE PRESSURE SWITCH D1T-A3SS *USED*
DURANT 6-Y-41346-402-M?EU *NEW OUT OF A BOX*
TURCK Bi15-CP40-VN4X2 *USED*
HEIDENHAIN LS 106 / 336 958-40 *NEW OUT OF BOX*
GENERAL ELECTRIC 22D155G2 110V COIL *USED*
LOT OF 4 BUSS FUSE HOLDER JT60030 600VAC *USED*
FACTS ENGINEERING FA-REC3 *NEW OUT OF A BOX*
ORMEC QTG910 PC BOARD *USED*
LUTZE DG 3-10-0,5M *USED*
GOULD 69171 *USED*
ITT 6000-04 *USED*
LOT OF 2 HOLJERON ZONELINK CONTROLLER ZL-***01-D *USED*
ANTUNES CONTROLS 8221210034 *USED*
LOT OF 2 DECCO 9-86-056 COIL *USED*
PCB LOAD CELL 203M22 *NEW*
MURR ELEKTRONIK 51120 *USED*
LOGICAL DEVICES INC. SHOOTER EE/EPROM PROGRAMMER RS232 ...
LOT OF 4 MAC VALVE 180027 *NEW*
EDWA*** 5530BHV-Y6 *NEW IN A BOX*
ATLAS COPCO POWER FOCUS 2101-S7-115R *NICE*
PHOTOSWITCH 47CN4 MODEL 1005 PHOTO ELECTRIC SENSOR *USE...
EDWA*** 5530BHV-Y6 *NEW OUT OF BOX*
FISHER 2U219533272 *NEW IN A BOX*
PYRONICS PS-0 *NEW IN A BOX*
MAC VALVE INC. 45A-AA1-DDAJ-1K?D SOLENOID VALVE *NEW IN ...
CUTLER-HAMMER CIRCUIT BREAKER HMCP003A0C *USED*
PLC DIRECT D2-16ND3-2 INPUT MODULE *USED*
BARKSDALE PRESSURE SWITCH D1T-A3SS *USED*
DURANT 6-Y-41346-402-M?EU *NEW OUT OF A BOX*
TURCK Bi15-CP40-VN4X2 *USED*
HEIDENHAIN LS 106 / 336 958-40 *NEW OUT OF BOX*
GENERAL ELECTRIC 22D155G2 110V COIL *USED*
LOT OF 4 BUSS FUSE HOLDER JT60030 600VAC *USED*
ALLEN BRADLEY 194R-NJ303P3 SER.B *USED*
LOT OF 6 ELECTROMATIC S408 10A/380V *USED*
TURCK BI5-G18-AZ3X-B3?331 *USED*
BOSTON GEAR RATIOTROL AC INVERTER ACE-T-230V-3P--?1HP
MANNE***ANN REXROTH VT5008-17B *USED*
FUJI ELECTRIC CIRCUIT BREAKER BU-ESB3060 *NEW*
HONEYWELL 926AB4XM-A9T-L *USED*
FISHER 1U230224492 *NEW IN BOX*
FIREYE TYPE.45UV5 MOD.1005 *USED*
ZZ-ANTRIEBE K080-0649-002 GEAR REDUCER *USED*
KRAUS & NAIMER CG4 *USED*
CRANE RM327777NN-0240 RESISTOFLEX *USED*
TAISEI KOGYO CO. LTD. ISF-04 SUCTION FILTER *USED*
BATTFELD GLOUCESTER ENGINEERING D40074099 REV.C POTENTI...
RELIANCE ELECTRIC 0-57170 PRINTER CIRCUIT DRIVE CARD *U...
MILAND ROSS 626-0194 *USED *
ACME/STANDARD POWER SPWS-59-OV POWER SUPPLY *NICE*
TOLEDO SCALE 1996 *USED*
YARWAY 711 721 *USED*
LENZE 961-334 BAS DRIVER BD *USED*
ALLEN BRADLEY 1305-BA03A SERIES A *USED*