To store a full video frame and display it twice requires a frame buffer electronic memory ( AC line frequency . ( This was 60 Hz in the US, 50 Hz Europe .)
32.
At the typical frequency of these solid state transformers, the plasma electron-ion recombination time is too long to extinguish and reignite the plasma at each cycle, unlike the case at power line frequency.
33.
;Hum "'usually refers to noise only at power line frequencies ( as opposed to broadband white noise ), which is introduced through induction of power line signals into the inputs of gain stages.
34.
In droop speed control, if the frequency decreases, the power is increased . ( The drop in line frequency is an indication that the increased load is causing the generators to slow down .)
35.
There's no reason you couldn't run an LED off the AC mains waveform, but if it weren't rectified the LED would blink at the rate of the line frequency .-- mattb @ 2007-03-29T05 : 59Z
36.
However, power can be transferred over longer distances and between separate AC grids by conversion to direct current during transmission, and conversion to alternating current in phase with the local line frequency at the delivery point.
37.
When operators of an electric generator wish to connect it to the grid, they first start the generator spinning at a rate approximately equal to the line frequency of the grid with which they plan to connect.
38.
The temporal gaps translate into a comb-like frequency spectrum for the signal, where the teeth are spaced at line frequency and concentrate most of the energy; the space between the teeth can be used to insert a color subcarrier.
39.
:: : If we were talking about LED traffic lights I'd guess that they were strobing at twice the power line frequency, the way fluorescents do, but that doesn't make sense for vehicle lights that would run on DC.
40.
Initially, service frequencies were similar to those for the Whitfords on weekdays . Services were reverted to Fremantle line frequencies between 09 : 00 and 14 : 00 on 28 June 2009 due to low passenger numbers on those services.
