可裁剪性带给用户的一个直接的好处是硬件成本降低,这对于成本敏感的应用,如消费电子类设备,具有重要的现实意义。由于设备中只包含应用程序用到的那部分操作系统功能,这就使得系统变得简单、易把握,从而提高系统的可靠性。
到位——实时性
许多人都把实时性理解为速度快。那么,速度快到什么程度才算是达到实时性呢?其实,所谓实时性,其核心含义在于确定性,而不是单纯的速度快。也就是说,RTOS所要求的是在规定的时间内做完应该做的事情,并且操作系统的行为(执行线索)是确定的,这是写出高可靠性程序的基础。如果完成同样的动作,有的时候快,有的时候慢,且执行线索千差万别,程序员无法把握,可靠性就无从保证。
嵌入式系统为什么对实时性要求那么高呢?因为嵌入式系统主要是对仪器设备的动作进行监测控制的,而一般的桌面操作系统基本上是根据人在键盘和鼠标发出的命令进行工作。相对而言,仪器设备的动作具有严格的、机械的时序要求,而人的动作和反应在时序上并不那么严格。比如,用于控制火箭发动机的嵌入式系统,它所发出的指令不仅要速度快,而且多个发动机之间的时序要求严格,否则就会差之毫厘、谬之千里。在这样的应用环境中,非实时的普通操作系统无论如何是无法适应的。
TEKTRONIX OTS90G1 GPIB MODULE 10Gb/s OC192
TEKTRONIX OTS90G1 GPIB MODULE OC192 10Gb/s
Tektronix DAS9200 Digital Analysis System
Tektronix TDS360 200 MHz 2-CH Digital Real-Time Scope
Tektronix SJ300E (Parts Unit)
TEKTRONIX 11301A Counter Timer Oscilloscope
TEKTRONIX WFM90 WAVEFORM/VECTOR/PICTURE/AUDIO MONITOR!
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Tektronix TAS485 200 MHz 4 Channel Analog Oscilloscope
Tektronix 1760A Waveform Monitor
TEKTRONIX TDS 350 2 CHANNEL OSCILLOSCOPE W/OPTS! TDS350
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TEKTRONIX TEKTRONIX TLA520 LOGIC ANALYZE TLA-520
TEKTRONIX DSA602A DIGITIZING SIGNAL ANALYZER W/PLUG INS
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TEKTRONIX TLA7P4 1S LOGIC ANALYZER 136CH 2GHz 16MB #1
TEKTRONIX TLA7P4 1S LOGIC ANALYZER 136CH 2GHz 16MB #7
Tektronix 2337 Oscilloscope 100 MHz
TEKTRONIX TLA7P4 1S LOGIC ANALYZER 136CH 2GHz 16MB #6
TEKTRONIX TLA7P4 1S LOGIC ANALYZER 136CH 2GHz 16MB #2
TEKTRONIX TLA7P4 1S LOGIC ANALYZER 136CH 2GHz 16MB #5
TEKTRONIX TLA7P4 1S LOGIC ANALYZER 136CH 2GHz 16MB #3
TEKTRONIX TLA7P4 1S LOGIC ANALYZER 136CH 2GHz 16MB #9
TEKTRONIX 2431L 300MHz DIGITAL OSCILLOSCOPE + P6131
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Tektronix TLA622 68 Channel Logic Analyzer option 6S
Tektronix VX4281 VXI Power Meter
Tektronix VX4521 Slot 0 Resource Manager
Tektronix P6217 Active Fet Probe
TEKTRONIX TLA7AA4 CS LOGIC ANALYZER 136CH 2MB DEPTH #1
TEKTRONIX TLA7AA4 CS LOGIC ANALYZER 136CH 2MB DEPTH #2
Tektronix TLA614 136 channel Logic Analyzer OPT’ 5S
Tektronix TDS340A – Oscilloscope 100 MHz, 2Ch, 500MSa/s
Tektronix AWG2040 Arbitrary Waveform Generator w/ Opt.3
Tektronix Video Measurement Set 1780R
TEKTRONIX 2465 DMS 2465DMS OSCILLOSCOPE TESTED
Tektronix TLS216 TLS 216 Logic Scope 2Gs/s GPIB 13 1F
Tektronix TLS216 TLS 216 Logic Scope 2Gs/s GPIB 13 1F
Tektronix P7350SMA – 5GHz Differential Probe
Tektronix TSI 8150 Test System Interface
Tektronix 2465B 400MHz 4 Channel
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TEKTRONIX 2465B OSCILLOSCOPE, 400 MHz, 4 CHANNEL, w/DVM
Tektronix TAP1500 1.5 GHz Active Probe TESTED
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TEKTRONIX P7240 4.0GHz Active PROBE
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Tektronix Type 576 Curve Tracer
TEKTRONIX TDS 520 2 CHANNEL OSCILLOSCOPE ..PARTS/REPAIR
Tektronix TDS 460 Oscilloscope 350 MHz 4 Channel
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4 PCS Tektronix P6245 Active Probe 1.5GHz 15PV Tested
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Microwave Logic Tektronix SJ-300 Sonet/SDH *Make Offer*
SONY TEKTRONIX RTD 710A WAVEFORM DIGITIZER
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