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据美国Venture Development Corp.报告，PLC与软PLC/PC控制相比具有以下优点：
维修务系统健全，有经验的维护人员队伍庞大。
电源故障不会产生大的影响。
对低端应用，PLC具有较大的性能价格比优势。
可靠性无可比拟，故障停机少。
加固型结构，适合工业环境应用。
与PC机发展太快相比，PLC产品可长期供货，长期提供技术支持。
PLC在工厂自动化中的地位之所以如此稳固，原因在于：
Tektronix CTS710 SONET Test Set w/opt 04/22
One-day shipping available
Tektronix TDS540C Oscilloscope, Digital: 500MHz,2GSa/s
Tektronix WFM601i wave forme Monitor
Tektronix DDS200 Digital Demodulator System
30-day warranty/14-day right of return
TEKTRONIX TFP2 FIBERMASTER OTDR WITH OPTIONS 11 16 24
Tektronix TDS684A 1GHz 4CH 5GSa/s Scope Color-options
***Calibrated with Certificate Jan-2011***
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TEKTRONIX 1740 USPP 1740
Tektronix SD43 E/O Converter DC - 8 GHz / 700 - 1650 nm
Tektronix TG700 Video Signal Generator Mainframe NEW
TEKTRONIX TDS3032 DIGITAL PHOSPHOR OSCILLOSCOPE
TEKTRONIX TDS 784A 4 CH COLOR DIGITIZING OSCILLOSCOPE
TEKTRONIX SONY WFM1125 HIGH DEFINITION WAVEFORM MONITOR
TEKTRONIX TDS754D 500 MHZ 2 GS S OSCILLOSCOPE 2M 2F
Tektronix TekRanger TFS3031 SM Fiber Optic OTDR
@CALIBRATED@Singlemode 1310nm & 1550nm@90 Day Warranty@
TEKTRONIX TLA7AA4 ES *136CH 32MB LOGIC ANALYZER MODULE
Tektronix TDS540 Digitizing Oscilloscope
TEKTRONIX OTS91L1 TRANSMITTER / RECEIVER 10Gb/s OC192
TEKTRONIX OTS91L1 TRANSMITTER / RECEIVER OC192 10Gb/s
TEKTRONIX TPS2024 DIGITAL OSCILLOSCOPE 200Mhz 4ch
Tektronix 494AP 10 kHz to 21 GHz Spectrum Analyzer
Tektronix TDS 754C Oscilloscope
Tektronix TFP2 OTDR Options 06/11/16/17 FS1315 case doc
One-day shipping available
Tektronix 751 BTSC Aural Modulation Monitor / Decorder
Tektronix K1297 Compact Protocol Tester 7KK1297-0TG01
Tektronix TDS460A 4 Ch. 400Mhz Oscilloscope W/ Options
Expedited shipping available
Tektronix TDS430A 4 Ch. 400Mhz Oscilloscope W/ Options
Expedited shipping available
Tektronix Model: VX4244, 16 Channel Digitizer
Tektronix TDS644A 4-Ch 500MHz Oscilloscope 13 1F 1M 2F
Tektronix TDS580D Four Channel Oscilloscope
TEKTRONIX TM502A W/ AM503 AM503B AND A6312 PROBE
Tektronix K1297 Protocol Tester
TEKTRONIX 2754P SPECTRUM ANALYZER 10 kHz to 21 GHz USED
TEKTRONIX 1765 Component Waveform / Vector Monitor NTSC
TEKTRONIX AWG2021 Arbitrary Waveform Generator 250 MHz
Tektronix TDS 754C 500 MHz 2 GS/s Oscilloscope
Tektronix TDS 520A TDS520A scope, NIST-calibrated
additional free NIST recalibration within one year
Tektronix TDS 420A TDS420A scope, NIST-calibrated
additional free NIST recalibration within one year
Tektronix TVS625 VXI Waveform Analyzer *warranty*
TEKTRONIX 7612D PROGRAMMABLE DIGITIZER
Tektronix 2430A Digital Oscilloscope + 2402A Tekmate+++
Tektronix TDS 520B TDS520B digital scope, NISTcertified
additional free NIST recalibration within one year
TEK TDS754C 4CH COLOR DIGITAL OSCILLOSCOPE 2 GS/s DPO
Tektronix TDS3012B scope 100MHz, 1.25 GS/s sample rate
Include a 90 Day warranty
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Tektronix TDS 430A TDS430A scope, NIST-calibrated
additional free NIST recalibration within one year
Tektronix TDS 544A TDS544A oscilloscope, NIST-certified
additional free NIST recalibration within one year
Tektronix VX4101 DMM/Counter VXI Module
Tektronix TDS794D 2GHz 4GS/s 4Ch Digital Oscilloscope
Tek 2467B 400 MHz, Analog Oscilloscope
TEKTRONIX 1405