Re: QT chooser and QT range do not cooperate with each other

[Achilleas Anastasopoulos]

Christophe,

thank you for the two suggestions. The second one (using selectors) is preferable for me.

Unfortunately the grc flowgraph you provided does not work for me at all: it does not produce any samples at the output.

I had to remove the first selector for it to work (see attached).

I don't know if this is another bug, but can you confirm that the grc flowgraph you sent me (with two selectors) worked for you?

best

Achilleas

On Mon, Apr 12, 2021 at 4:41 PM Christophe Seguinot <christophe.seguinot@orange.fr> wrote:

I would have implement this differently:

• First solution combine To filters taps in one filter such as
• final_taps=rrc_taps*(pulse-1)+rect*pulse
• with pulse =0 or 1 (obtainde with a QT GUI Chooser)
  
• BUT filters must have the same number of coefficients
• 2nd: use QT Gui selector as in this flowgraph. (it can be extended to multiple filters easily)

Regards, Christophe

P.S. my flowgraph is for GR 3.8 /3.9

On 12/04/2021 19:10, Achilleas Anastasopoulos wrote:

Hi all,

I have a flowgraph with QT chooser choosing between rect pulse and rrc pulse.

I also have a QT range where I want to control the rolloff factor of the rrc pulse when chosen.

However, in the flowgrpah it seems that once the rrc is chosen I cannot change its roloff factor dynamically from the QT range.

I have tried it in both 3.7 and 3.8 and I get the same result.

Is this a bug?

Is there a more appropriate way of achieving this result?

thanks

Achilleas

test_chooser_3.grc
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