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In article <[email protected]>, George Bittar <[email protected]> writes > So, I have to measure selectively the 1KHz signal at the terminals > of the equipment in order to know if the equipment is DEMODULATING > the signal. > > The power level of 1KHz signal cannot be higher than -40dBm for my > application. It isn't usual to measure signal power at audio frequencies with a 'power meter'. Normally, the voltage across a load resistor is measured. Does this equipment produce a wanted audio output signal in normal operation? If so, can you describe what sort of output connector is provided (which will give a clue as to how to do the measurement you need). A simple 1 kHz band-pass filter is part of the solution. Most of the other part is probably the correct value of the load resistor. -- Regards, John Woodgate, OOO - Own Opinions Only. The good news is that nothing is compulsory. The bad news is that everything is prohibited. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. IEEE PSES Main Website: http://www.ieee-pses.org/ To post a message send your e-mail to [email protected] Instructions for use of the list server: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
