I wonder what THD looks like for a carrier in CW/SSB
detection and a bandwidth customary for those two modes.
I've been running with no hang time and very fast
dB/s... but maybe I'm tolerating more distortion that I should?
-- Eric K3NA
on 06 Mar 18 Sat 11:37 Sinisa Hristov said the following:
> A fixed width font is recommended to view the data correctly.
>
>
>
> Part One - Total Harmonic Distortion
> ====================================
>
>
> Main RX, 3750 kHz, AM
> PREAMP OFF, ATTN OFF, RF GAIN 100
> ROOF 20 kHz, BW 6000 Hz, PBT 0 Hz
> modulation freq = 300 Hz, modulation depth = 50 %
> carrier level = -53 dBm (S9 + 20 dB)
> measured at speaker output with external 4 Ohm speaker connected
>
>
> Total Harmonic Distortion
> in Percent
>
> HANG dB/s 1.373b5 2.056
> -----------------------------
> 0.3 5 0.41 0.44
> 0 5 1.27 0.65
> 0 50 4.8 3.1
> 0 100 8.0 5.8
> 0 200 13.4 10.5
> 0 500 24.5 21.4
> 0 1000 35 35
>
> Orion can deliver up to 1.4 W into 4 Ohm load with
> less than 0.5 % THD, using HANG of 0.3 seconds and 5 dB/s.
>
> This is a static mesurement in laboratory conditions.
> On the air performance seems to be affected a lot by selective fading.
-snip-
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