[Elecraft] [P3] How to measure bandwidth of RX signal

[Don Wilhelm]

David,

Your assumption is correct.  The P3 should show you the true width of 
the signal.

73,
Don W3FPR

On 4/28/2014 10:08 AM, David Cole wrote:
> Hi,
>
> All the ESSB talk got me wondering about how accurate the P3 might be
> for measuring bandwidth.  Could someone review my method for this
> outlined below and comment please:
>
> 1.  Use ATT if needed to avoid very strong signals
> 2.  Set bandwidth to 4 KHz.  See note below.
> 3.  Adjust Span on P3 5 KHz per side
> 4.  Shaded area above waterfall indicates K3 bandwidth
>
> Watch P3.  Can one trust the waterfall display to show actual bandwidth?
> If so, how accurate would it be?
>
> Note:
> I believe that the P3 is tapped prior to any BW restrictions, (of merit
> to this exercise), so I understand that step 2 is just for my ears only,
> and does not affect BW display on the P3.  Is that a correct assumption?
>