13 Nov
2007
13 Nov
'07
11:47 p.m.
On 13 Nov 2007 at 14:16, Grant Stockly wrote:
If that is the case, why would the Tarbell have so
many extra
chips? Also, at the time the tarbell was manufactured, would they
have even known that there was an issue with the 1771's data separation?
WD made no bones about it. In the app notes for the 1771, they say:
"In order to maintain an error rate better than 10**8, and(sic)
external data seperator (sic) is recommended."
Yes, they spell it "seperator" throughout the application notes (this
was before spelling checkers appeared on Red Hill Road, I suppose).
The app notes has several customer-supplied circuits for data
"seperators".
In point of fact, the Shugart SA-801 has an on-board one-shot data
separator for FM and you'd be crazy to use it.
Cheers,
Chuck