AppImage - Filter Bug

[Michael Walker]

Hi Guys

If operating on a Flex with the current AppImage, if you are in FDVL and try to make a filter adjustment, the Filter passband goes to Upper Side band.

You can see it here:  

https://imgur.com/aFEqpE9

Mike va3mw

[Mooneer Salem]

Hi Mike,

I played around with this a bit on my end. With SmartSDR for Mac (not sure about Windows), I can't manually enter values for the high/low cutoffs, but I can use the arrows to adjust. Using the arrows, the filter does remain in LSB. However, once the filter center goes above 0, the filter does change to be USB instead of LSB. Additionally I don't see any indication that the AppImage is trying to override any adjustments to the filters (other than when initially entering FDVU or FDVL). 

Anyway, I suspect this is a Flex bug. (I'm testing with 4.0.1 FWIW.)

Thanks,

-Mooneer K6AQ

--
You received this message because you are subscribed to the Google Groups "digitalvoice" group.
To unsubscribe from this group and stop receiving emails from it, send an email to digitalvoice...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/digitalvoice/6cf5490f-90df-4cbf-a53a-129df6acc6f3n%40googlegroups.com.

[Michael Walker]

Thanks Mooneer

Try changing the bandwidth from one of the fixed values to another fixed value and see if it fails for you.

• What should be the default transmit filter widths?
• And, the same for RX, what should be the optimal settings of filter width?  

Right now, I am getting reports of distorted TX audio on the AppImage when using a  PI4 as the host.  I'm still trying to isolate it to a root cause.

thanks, Mike va3mw

To view this discussion visit https://groups.google.com/d/msgid/digitalvoice/CAAzDfxO_tfd26VK7X9GBL57exDqTktzA4H5o_TdSQAYyHgxs2Q%40mail.gmail.com.

[Mooneer Salem]

Hi Mike,

Yeah, pushing the buttons behaves similarly for me too.

Re: bandwidths, TX should remain the same as default (IIRC something like 2.5-2.7 kHz wide). For RX there should be no need to change what the waveform does when you switch to FDVU or FDVL.

Thanks,

-Mooneer K6AQ

To view this discussion visit https://groups.google.com/d/msgid/digitalvoice/CANSPDxaZ54S%3DZmWdq6KmmqLE3wu-%3DQRmv9okusZgdkWOYXTQEA%40mail.gmail.com.