Again, I'll ask the question? Are the current tests when run properly
failing to detect non-compliant systems? If not then what is CISPR
wasting our time and money for?
Gary
-----Original Message-----
From: Mark Briggs [SMTP:[email protected]]
Sent: Monday, October 12, 1998 3:38 PM
To: 'EMC-PSTC'
Subject: RE: New CISPR22 requirement
Grant -
One of the main prooblems that I can see will be with the ISNs
(networks
used to provide a reference common mode impedance to ground for
the
signal linethat are required for signal lines. Their
construction will,
for some data rates, corrupt the data and prevent the interface
from
operating.
Other concerns that spring to mind include the termination of
shielded
cables to the ground plane in order to measure the conducted
emissions on
ports with shielded cables. Without the spec in front of me I
can't
remember what the valu of the resistor should be.
Finally - the length of time to perform tests. If you have a
16-port
device, the time taken to measure the emissions on each port in
turn and
the numner of ISNs required would cost lots of $$$ in time and
equipment.
Mark
Mark Briggs
[email protected]
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