From: NAME: BERNARD MCEWEN
FUNC: 324850 International
TEL: 44-1344-86-9999 <BMCEWEN@A1@URSA>
To: MX%"[email protected]"@MRGATE@wpc
Cynthia,
"Passing the emissions test" is the key phrase. Under the limit
is under the limit, so 0.1dB is a pass. If the specification
intended a 6dB margin across the band, then the line would be 6dB
lower, wouldn't it.
BUT your test result merely proves the representative sample to
be below the limit. If that's the one you're going to sell, and
you're not going to make another one, then you have every
justification in having a 0dB margin.
How do you feel, as an engineer, defending the position that you
considered that all the units made on an assembly line would not
exceed the emissions of the cossetted unit of which you
personally torqued every fastener, cleaned every gasket, and
checked every connector to make sure it passed?
You want to make several of these products. Any margin you select
must be justified by a reasonable argument that production units
will not deviate beyond that emissions margin. If you can show
that your representative sample is a "worst case", then 0dB is
justified.
As always, this message is my personal opinion; it is not
necessarily that of my employer.
Regards, Bernard McEwen. Approvals Specialist.
Gandalf International. tel.: +44 1344 869 999
Remember Nixon's principle:
"If two wrongs don't make a right. Try three."
PS. Oh yes, I was going to say something about Austel and
Telstra.
Telstra is the carrier, and used to be responsible for
connection approvals. Come privatisation, and Austel was
commissioned to regulate connection approvals.
The changes due are that Austel will switch from regulating
approvals to policing them. Connection approvals will be based
more on self-declaration and a technical file. Austel will
randomly select approval holders and check their product and
files. It is expected that natural animosity between competing
vendors will provide Austel with enough tips to keep them
knocking at doors at three in the morning most nights of the
week.
Best wishes, Bernie McEwen.
