Tim,
USB is a serial interface. Note that ANSI C63.4 does not say “RS-232 serial interface”, just “serial interface”. I think that will take care of the problem for the desktop machine for now. Now, what if you use a host that doesn’t have a parallel port? I would use my “engineering judgment” that says it’s real hard to test a port that doesn’t exist. In the meantime, this is a good point to bring up to ANSI C63 for the next update to C63.4. Ghery S. Pettit Intel Corporation From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Sunday, January 18, 2004 11:14 PM To: [email protected] Subject: ANSI Minimum Configuration Requirement Hello, I recently ran into a question on the "minimum configuration" for emissions testing on a computer peripheral as stated in ANSI C63.4 and EN 55022. The standards say you must have a serial and parallel device connected to the computer, as a minimum configuration, when testing a computer peripheral. Recently, I purchased a new Dell laptop, which does not have parallel or serial ports. It only has 2 USB and a video port. I also have a new Dell desktop, which has a parallel port, and a bunch of USB ports, but no serial port. Is there an exception for these computers, which are phasing out the old serial and parallel ports? How do I meet the "minimum configuration" requirement? Thanks in advance, Tim Pierce
