[Elecraft] Monitor output...

[Phil Hystad]

I am not sure I understand the feature being described.  Are you planning on a video output direct to a monitor or are you planning on some kind of interface to a computer for display to a monitor via an application program (I am not sure of the performance demands for this though).

73, phil, K7PEH


On May 15, 2011, at 9:05 AM, Alan Bloom wrote:

>> According to N1AL, here are 468 active FFT bins.
> 
> It's a little more complicated than that.  The FFT is actually 1024
> points.  The digital filter rolls off the edges, so the outer 20% of the
> points are thrown away.  The remaining 800 or so are then interpolated
> to obtain the 468 display points.
> 
> I think we'll probably go with a 2048-point FFT for the external display
> to take advantage of the additional resolution.
> 
> Alan N1AL
> 
> 
> On Sun, 2011-05-15 at 08:25 -0700, Jim Brown wrote:
>> On 5/15/2011 12:44 AM, Ian White GM3SEK wrote:
>>> I came to the P3 from an SDR-IQ using a 15in second monitor [1], linked
>>> to the K3 and N1MMLogger through LP-Bridge. For the moment, the much
>>> tighter integration between the P3 and the K3 (particularly the tracking
>>> cursors on*both*  VFOs) overrides the need to peer at a small screen
>>> that is lacking in detail.
>> 
>> Before going too far down the trail about lacking detail, it's important 
>> to realize that  resolution is also limited by the FFT parameters used 
>> to process the complex IF signal and convert it to the frequency 
>> display. According to N1AL, here are 468 active FFT bins.  I haven't 
>> seen numbers for the frequency and time resolution of the FFT process, 
>> but the upper limit of frequency resolution is (F2-F1)/468.
>> 
>> FWIW, I'm quite happy with the P3 display, and only wish it were smaller 
>> (that is, less depth front to rear) with a swiveling bracket to mount it 
>> to the underside of a shelf above my rig.
>> 
>> 73, Jim K9YC
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