ISSN:
1573-8906
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
Notes:
Conclusions 1. The error in voltage measurement by means of diode voltmeters due to the distortion of the waveform can be several times greater at high frequencies than at low ones. 2. When voltages are measured at frequencies close to the value of: (9) $$f = \frac{{f_p }}{n},$$ there can be considerable additional resonance errors due to the presence of harmonics in the voltage under test. 3. In order to account for this error it is necessary to have quantitative and phase data on the harmonics in the signal under test, which are not always available. Hence, when measuring voltages by means of diode peak voltmeters, and especially when determining experimentally the resonance error characteristic of these voltmeters, it is advisable not to choose frequencies (if that is possible) close to the value given in Formula (9). The question of a compulsory indication of the resonance frequency in the technical specifications of voltmeters should be raised. 4. When the resonance error curve is determined experimentally it is advisable to set particularly high requirements for the auxiliary oscillator voltage waveform and to take steps to reduce the content of each harmonic (and especially those of a higher order) to 0.1 to 0.2%. 5. Diode voltmeters used in standard signal generators and power meters at frequencies for which the resonance error becomes important, can produce errors several times greater than the nonlinear distortion coefficient. This fact must be taken into consideration when standard signal generators are developed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00974469
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