Quote:
Originally Posted by Electronic M
I have a Toshiba Beta VCR (don't have the model plate in front of me now) that every time it is plugged in will initially display 60Hz for a couple sec then revert to time or counter...Half of Japan is 50Hz power (rest is 60Hz), and a number of NTSC countries are 50Hz power.
In the US it is a common practice to use the power grid frequency to act as a reference for mechanical and digital clocks (count 60 cycles on a 60Hz grid and you have exactly a second)...I believe the same can be done on 50Hz.
Knowing if the VCR is recognizing the power grid frequency correctly could aid in diagnosing the clock drifting.
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thanks a lot
on my Sanyo Plus E55 E-55 Audio Program Timer the power grid frequency is switch by manual
i am curious what chip used that vcr for recognizing the power grid frequency correctly
so
Please to make video view [or take picture ] on display tube For me when turned on
displaying 60Hz light for a couple sec
THANKS in advance