Interpretation of FE_READ_BER

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Hi,

What is the interpretation of the value returned by ioctl FE_READ_BER?

Normally, a bit-error-rate is something like 10^-6 (typically not an
integer value).

There is no clue in the Linux DVB API doc. Google reports similar
questions but none with an answer. I have just seen one note suggesting
it could be a multiple of 10^-9. Looks good to me but since there is
no good definition of this parameter in the docs, I wonder if drivers
implement them in a consistent way.

With my Nova-T 500 (Fedora 8, kernel 2.6.24.3-12, recent v4l hg tree),
the reception is quite fine, FE_READ_SIGNAL_STRENGTH returns 40000 (60%),
but FE_READ_BER always returns 0. Does this mean "not even the slightest
error" (to good to be true), "not supported" (should return errno ENOSYS),
"driver bug"?

-Thierry


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