(download is at the bottom)
UPDATED to v1.1.0 (24th Aug ’20)
Passband History is a Win10 helper app that can be used along side WSTX-X / JTDX to display passband activity of many of the JT/FT modes. Have you ever wondered where you should place your transmit ‘slice’?
Passband History helps with that by keeping up to 5 minutes worth of signals, displaying them ordered by SNR, and working out where best to place that transmission. It does this by :
- Looking for areas of low signal to noise ratio
- Working out if a contiguous area is large enough to fit a required percentage of our transmission ‘slice’ bandwidth
- Weight that contiguous area according to the distance from the red marker
![](https://ramdor.co.uk/wp-content/uploads/2020/06/bph_wide-1024x148.jpg)
In the image above you can see the yellow area it is chosen. You can move your TX slice in WSJT-X / JTDX to be over the top of this yellow area. Unfortunately the protocol between WSJT-X / JTDX does not provide a method to set this TX frequency directly. Right click as normal in WSJT-X / JTDX to move the transmit slice.
![](https://ramdor.co.uk/wp-content/uploads/2020/06/bph_graph-1.jpg)
Pasband History also takes 1 minute snap shots of the signals received, and uses this information to produce three charts. An snr chart and a distance chart which both show minimum, maximum and averages. Distances are calculated using maidenhead locator information. The last chart shows the number of signals received in that 1 minute time slice. This data is not stored and will cover 48hrs of history.
The following video explains how to use the software and the download link is below.
v1.0.0 – release
v1.1.0 – fix to maidenhead parsing, more are now valid
[md5] 579EF5BC3F87671867D9B81C0C1E0B80