ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
An examination of the results of the accuracy measurements of a bench top audio-frequency selective voltmeter, based on the superheterodyne principle, showed that an accuracy of the order of only 10% of measured values could be achieved if no internal error correction procedure in the measurements had been used. The temperature variations of the parameters of the quartz band-pass filter have been identified as the main source of the measurement error. An application of the internal reference signal from a relatively simple and inexpensive source improved the overall accuracy up to the order of 3%. Finally, it was shown that by combining the wide band and selective measurements of the signals from the built-in tracking generator further improved the overall accuracy to better than 1% and eliminated altogether the need for using any separate source of internal reference signals.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1145212
