Re: lCambridge 302 Security Fail

Thank you Tim for pointing out the obvious. I was suggesting that it is
necessary on a 302A (which has no on-screen display) it is useful to check
that the unit is sealed; if it is a bad seal it can be fixed. The security
fail message gives no indication of the cause of verification fail. The
charge from RD is zero profit in my case, regarded as part of product
support. I don't think Dickie makes a fortune either.

I would be delighted if CAI could sort this, and several other issues.
Unfortunately there is no development or debugging capability at CAI, and
I can do nothing about that.

For what it's worth, I firmly believe that the memory wrap is a complete
red-herring; units that downloaded fligths with failed verification later
downloaded the same flight with different utility software OK. I suspect
from investigation, based on limited information available to me that the
problem units use a different flash memory from the original design due to
the original memory going out of production. This may give rise to timing
issues.


At 01:51 12 December 2008, Andy wrote:
On Dec 11, 3:45=A0pm, Peter Purdie wrote:
Hooked up to a PDA or PC with a terminal program. typ VER .

The 302A will give a text message, concluding (if there is a bad
electronic seal) with 'Security Fail'.

If so, in UK send it to me at RD Aviation or Dickie Feakes where it
can
b=
e
resealed (after checking the memory battery voltage and replacing if
necessary).

The security fail report does not indicate that the seal is bad.
Please assist Cambridge with fixing the design problem rather than
using it to solicit business!

Andy

.

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