Power Calibration Standard Based on Digitally Synthesized Sinewaves

Discussion on new properties of staircase waveform through connection to an infinite series

“…If the original signal in (1) is transformed into y(x) = sin 2x (12) and the discrete interval in (3) is held, then the staircase waveform in the time domain can be written as…”

“…Many papers have been published to discuss its properties [1,2], its applications in the AC voltage standard [3][4][5][6][7][8], the power measurement [9][10][11][12][13], the phase reference [14], the impedance comparison [15], the harmonic component measurement and the analogue-to-digital converter calibration [16]. Devices which implement digital-to-analogue conversion are available from the electronic digital-to-analogue converter (DAC), and the programmable Josephson voltage standard minimises uncertainty at the quantum level.…”

The NIST digitally synthesized power calibration source

“…In order to verify this, the top line of the screen in the secondary menu should be the same as the selected row in the primary menu. To return to the primary menu, press the "FIRST PAGE" key (k9) that has replaced the "SECOND PAGE" (1,4) = "Reset_delay'' (7,4) = "Interval" (2,4) = "Num_of_reps" (3,4) = "Ac_or_dc" (4,4) = "Gain" (5,4) = "Settlejime" (6,4) = "Full_scale" (8,4) = "Limit" (9,4) = "Percent_of_fs" (10,4) = "P_of_fs_limit" (11,4) = "Enable" (12,4) = "Devices"…”

“…This approach has led to the development of a dual-channel sinewave source of voltage and current, which is shown in figure L Previous experience with digital waveform synthesis methods [1][2][3][4][5][6] The heart of the power calibration source is a digital generator (see fig. 3 [9].…”

Phase meter calibration at NBS

“…For instance, with auxiliary voltage and current amplifiers, the phase standard can be used as a stable, easily adjustable signal source for checking wattmeters and watthour meters [9,10]. It can also be used to test various signal analyzers that need a phase-variable reference.…”