N1913A功率计和录音机输出噪音很大

嗨，我购买了N1913A功率计，我测试了所有功能。
除输出记录器外，Everething很棒......输出噪声很大（脉冲噪声）。
我检查了另一个N1913A，结果相同。
直流电压可在0V至1V之间变化，具体取决于功率探头测量的设置和功率水平。
直流电压有大约143mVpp的脉冲噪声。
单发采集模式没有区别。
我用示波器进行了测试，从0到1 V（校准器开/关，设置限制-10dBm到0dBm）和峰峰值噪声测量......见图片。
我很惊讶，有人有同样的问题吗？
Yves Montreal，QC Canada
zoom on impulse noise.png25.8 KB



     以下为原文

  Hi,  
      I purchased a N1913A power meter, and I tested all functions. Everething was great except the output recorder...the output was noisy (impulse noise). I checked another N1913A with same result. DC voltage may vary from 0V to 1V depend on setting and power level measured with power probe. There was around 143mVpp of impulse noise on DC voltage. No difference in single shot acquistion mode. I've done a test with an oscilloscope, from 0 to 1 V (calibrator on/off, setting limit -10dBm to 0dBm) and a measure of peak to peak noise...see pictures.  

      I'm surprised, somebody have same problem?


Yves
Montreal, QC
Canada
附件

• calibrator off to on.png24.8 KB
• zoom on impulse noise.png25.8 KB