[Elecraft] Re: K3 and AM mode: using the DSP bandwidth controls

wayne burdick n6kr at elecraft.com
Tue Dec 18 01:12:39 EST 2007


Bill W5WVO wrote:

> To clarify -- Will something equivalent to this mode be possible on 
> the K3 >>IN AM MODE<<  -- i.e., without having to absorb the carrier 
> energy, as when listening in USB/LSB mode? Can I shift the IF passband 
> in AM mode and listen to just one sideband or the other?

Bill,

In AM mode, if you tap XFIL to select a 2.8 or 2.7 kHz filter, then 
SHIFT the passband down (counterclockwise), you'll be removing one 
sideband. The narrower crystal filter passband results in a loss of 
fidelity from the high-precision I-Q AM demodulator, but the signal 
will still be intelligible.

If you want to control which sideband you remove, you can always use 
LSB or USB. This provides excellent fidelity on AM signals, and you 
don't have to touch the VFO -- just changes modes.

73,
Wayne
N6KR

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