just tried to do also some dynamic range measurements two HP 8640 Generators (out +20dBm) attenuated to 0dBm into an 6dB coupler attenuated to -10 dBm into an stepp-attenuator
done on 20meter with 4pole 500Hz filter IMD with pre -140 dBm IMD no pre -134 dBm dynamic range no pre spacing IMD-Level Dynamic 20 kHz -31 dBm 103 dB 5 kHz -31 dBm 103 dB 2 kHz -34 dBm 100 dB +/- inaccuration very happy 73 klaus OE6KYG > My measurements give a 3rd order dynamic range of around 100 dB at > 2 KHz signal spacing with a 400 Hz 8 pole filter and slightly better > with a 2.8 KHz 8 pole filter (around 105 dB). >We measured a dynamic range of c. 106db (+/- a few dB) from 100kHz down >to 2kHz with the 8 pole 400Hz filter on 20m. So both measurements (by >DK4YJ with K3 #00067 and G4AON with K3 #00080) are in the same ballpark. _______________________________________________ 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
