[Lowfer] Spectran question

[Bill Cromwell]

On 04/04/2014 01:05 PM, John Bruce McCreath wrote:
> With Spectran setup selected to the preset NDB mode (0 to 7400 Hz.) As soon as I press
> the start button, a red vertical line appears in the upper spectrum display at 3500 Hz.
> What is it and is there any way to turn it of?  Thanks in advance for any replies.
>
> 73, J.B., VE3EAR
>
> LowFER Beacon "EAR"
> 188.830 kHz. QRSS30
> EN93dr
>
>
Hi John,

I do not have an immediate answer but I can tell you that the couple of 
times I tried the NDB setting I did NOT have such a red line. When I get 
out the toys later this evening and into the weekend I will 
intentionally use the NDB AND try to find something that will give me  
stripe at 3500.

I use Spectran with very narrow filter settings and I copy CW by ear - 
not on screen as with QRSS (which "NDB" seems to be, only faster) nor 
with any of the printing decoders. I turn on the CW peaking and put that 
in the middle of the filter - at 500 Hz. I then tune my radio to bring 
signals that I can see into the filter and right on top of the CW peak 
'pip'. That pip is red. I wonder if that's what you see.

*MY* computer is not hard of hearing at 500, 400, 300 - but my audio 
channel rolls off below that. My computer displays a pip at exactly 120 
Hz from power line hum - which I cannot hear due to said rolloff. 
Obviously the PC and soundcard can "hear" it. Your computer may be 
different.

John - you might give me a phone call later and we can both fire up 
spectran to compare notes on the phone. I'm in the Eastern time zone and 
I expect a very late supper tonight around 9 PM. We could do that 
earlier if you are available. Or just wait and I'll email you some 
screen shots from MY spectran screens and we can exchange email with 
attachments.

73,

Bill  KU8H

989-534-1409