Re: No Tsync in HAMPAL
- We seem to have fixed this problem.
The poor end to end frequency response was the cause.
Inserting a undervalued coupling capacitor in series with the
transmitter input helped level the response.
We are now getting sync ups every time.
Using the spectrum display in WINDRM gave us the best indication of
the poor response.
HAMPAL is nice to use but does not have the diagnostic ov WINDRM.
--- In firstname.lastname@example.org, "static5x9" <roverk9@...> wrote:
> I am using HAMPAL mainly in a small local group on VHF FM.
> However I am intermittenly getting no Tsync on some contacts and
> nothing further recovered.
> Trying a few times without changing anything, eventually all the
> indicators light up and signal quality is 90% or better so the RF
> is good and the modulation depth is pretty right.
> Upgrading my soundcard driver seemed to improve things but has not
> eliminated the problem.
> There are 4 of us in the local group and the problem shows mostly
> between myself and one other station. However that station and
> have no problems with the other 2 stations.
> Has anyone experienced this or does anyone know what may be
> Bruce VK4EHT