Ken, In my understanding, the "close-in IMD" is only applied to receivers. The ARRL Handbook describes the setup in the Test Procedures chapter under Receiver Performance Tests - although they only desribe the 20 kHz setup, the 5 kHz setup should be the same, but the frequencies will be closer. 2 signal generators, a Hybrid combiner, attenuators, the receiver under test, and an audio voltmeter are the tools used.
Amplifier and Transmitter IMD is different, and the output is measured while being driven with a 2 tone generator - 900 Hz and 1900 Hz are typical tones. The output is most easily monitored and analyzed with a Spectrum Analyzer. The ARRL Lab uses the setup shown in Figure 25.84 of the ARRL 2005 Handbook. 73, Don W3FPR > -----Original Message----- > > > Does anyone know how to test an amplifier, or for that matter a > transceiver, > for close > in IMD products? What kind of equipment is needed? > > Ken KG0WX > K2 #4913, XG2 > > _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
