71M6513 Broadband VARh Harmonic Performance?
Teridian Semiconductor Corporation has? developed? a custom compute engine firmware to support the energy
metering in the presence of harmonics. The Compute Engine firmware CE13B11 was developed to provide the
following capabilities:
1.? Broadband VARh measurement capability?
2.? A zero-latency pulse output.??
Deleted features from the previous version are VARPULSE and certain EQU features.? Aside from VAR, EQU,
WPULSE, and VARPULSE, no other features have been changed.
Broadband VAR
The previous CE code shifted the fundamental and all harmonics by 90 degrees, but exhibited a 1/f amplitude
characteristic on harmonics. Specifically, the fundamental, regardless of frequency, was always shifted at unity
gain. The third harmonic was attenuated by 3x, the fifth by 5x, etc.