Interesting data but what am I missing here? "Note the K3 audio amplifier is the cleanest hands down". Looking at the data below, doesn't it show that in the 22 audio ranges from 50-3200hz that the MP has a lower noise level in 12 out of 20 ranges and is about identical in most of the others? Doesn't a lower negative number = a lower noise level? 73, Dick- K9OM Here are some measurements using Spectrogram and broadband noise:
FT-2000 --- MK V --- IC-706 ------ K3 ------ Analog DSP MKIIG Norm BW=4 EQ 50 -34 -44 -49 -46 -35 -7 -35 100 -31 -24 -27 -40 -18 -6 -18 200 -17 -10 -9 -21 -5 -2 -5 300 -6 -4 -4 -11 -1 0 -1 400 -3 -2 -1 -5 0 0 0 600 -2 -1 0 -1 0 0 2 800 -1 -1 0 0 0 0 1 1000 -1 -1 0 -1 0 0 0 1200 0 -1 0 -2 0 0 0 1400 0 0 0 -1 0 0 -2 1600 -1 -2 -1 -2 0 0 -3 1800 -2 -3 -2 -3 0 0 -4 2000 -5 -5 -2 -4 -1 0 -5 2200 -7 -6 -3 -6 -2 0 -7 2400 -8 -8 -4 -8 -2 0 -8 2600 -10 -10 -6 -15 -3 0 -9 2700 -23 -13 -7 -27 -4 0 -10 2800 -34 -19 -11 -31 -8 0 -14 2900 -41 -32 -24 -33 -18 0 -24 3000 -50 -43 -36 -35 -58 0 -60 3100 -42 -67 0 3200 -58 0 3300 0 3400 0 3500 0 3600 -1 3700 -2 3800 -4 3900 -5 4000 -13 4100 -34 4150 -66 All measurements were made at the speaker output for consistency. All measurements were made in USB mode with the default filter settings. FT-1000MP Mark V was measured with both the analog and DSP (100-3100 Hz setting) detectors. The two additional K3 measurements are 1) FM filter, BW=4.00 and FC=2.00 and 2) "NORM" using the "pink EQ" settings (1.60=-3, 2.40=-5, 3.20=-6). Note the K3 audio amplifier is the cleanest hands down. The other transceivers had noise floors at about -120 dBV (IC-706 mkIIg was -100 dBV). Except for what appear to be artifacts of the ADC clock at 4, 8, 12, 16, 18 and 20 KHz the K3 out of band audio noise is <140 dBV. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
