描述
直流电压在物理书中的介绍是大小和方向均不会随时间的变化而变化的电压，我们常见的在直流电路之中，电源两端和某电路两端以及用电器元件两端所使用的电压就是直流电压，很简单的一个例子手电筒的电池(电源)两端和用电器小灯泡(元件)两端使用的电压就是直流电压。
Tektronix DSA602 Signal Analyzer w/ 11A52/11A72 plugins
NIST calibration/30-day warranty/14-day right of return
Tektronix 2465 300 MHz 4-channel scope, NIST-certified
additional free NIST recalibration within one year
Tektronix 2465B
TEKTRONIX 11403 Digitizing Oscilloscope
Tektronix P7330 Differential Probe 3.5 GHz
Tektronix 11201 Oscilloscope
NIST calibration/30-day warranty/14-day right of return
Tektronix P6417 17 Channel General-Purpose Logic Analyz
Tektronix TDS220 100MHz, Digital Oscilloscope
Tektronix TDS460A Digitizing Oscilloscope, 400MHZ, 4CH
TEKTRONIX P6249 4GHz ACTIVE PROBE + ACCESSORIES #16
TEKTRONIX P6249 4GHz ACTIVE PROBE + ACCESSORIES #17
