128fs

[Magnus Danielson]

From: Mush <dblum at artic.edu>
Subject: 128fs
Date: Sat, 02 Sep 2000 12:44:40 +0000

> Can anyone give me a basic explanation of what "128fs" refers to?  I've seen
> it mentioned in some reference to masterclock, but i have no idea what it is
> or its function...what the difference between 1fs, 128fs, 256fs etc. is.

fs = f  = f         = sampling frequency
      s    sampling

Thus, 128fs is 128 * fs or put in another way, 128 times the sampling
frequency. It's just a ugly shorthand. I'm sure you can figure out 256fs from
this reasoning.

> Also if a converter has both spdif i/o and 128fs i/o, how do they function in
> relation to each other?

Both are serial formats, but where SPDIF is line encoded the "128fs i/o"
serial format contains clock, word clock and data. The word clock is required
for bit/word synchronisation. It should be pretty obvious from the datasheets
timing diagrams for instance on how to interprent these.

Cheers,
Magnus