[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
>
>
Okay..so I couldn't stand the suspense. I brought it up and looked at it 
in NDB mode. The cw will be shown a la QRSS on the lower screen. The red 
vertical stripe is the upper limit of of what is being displayed in that 
lower, horizontal scroll. The width of that spectrum will be determined 
by the sampling rate you select. I tried it so see.

Grab the scroll tool at the bottom of the screen to scroll the spectrum 
to a different place.  Your red stripe will not move the spectrum that 
is displayed will change. Instead of 3500 (in your case) being under 
that red 'ceiling' line maybe 7000 will be there and if you look at the 
left edge you will see it is no longer at zero but is 3500 lower than 
whatever is under the red stripe. You use those tools to look at 
"windows" of spectrum on your display.

I hope this helps.

73,

Bill  KU8H

Back to my own way of using Spectran