Standards for the calibration of Q-meters 50 kHz to 45 MHz
R. N. Jones · Journal of Research of the National Bureau of Standards Section C Engineering and Instrumentation · 1964
The N ational Bureau of Standards is now eq uipped to provide impro ved cali bration services for Q-standa rds in t he fr equenc y range extending from 50 kH z to 45 M J l z.As a r es ult of recent developm e nt work, calibration uncerta int ies have been red uced to m ngnitudes which are compara ble to the resolution of Q-meters in both resonat ing capacita nce a nd Q.The uncertainties in the v alues of the NBS st a ndards a re co nsistent with t he best t woterminal impeda nce m eas urements currently obtaina ble, but beyo nd t hi s Lh e value of t he NBS st anda rds have been statistica lly a djust ed to prov ide a high er degree of standa rdi zation.Included in t he paper is a di scuss ion of the differe nces betwee n t he Q-m eter indi cated values for a st and ard a nd t he effective values of the st a nd a rd a give n b y NBS.These difference a re la rge ly due t o residua l immittances in t he Q-meter circuit a nd met hods for evaluati ng these residuals a re prese nted.