Re: NBFM (Was: AM on sBITX?)

#114141

Hi Rafael,

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Thank you for the links!

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I have had a setback with my DE, so I cannot try this until I repair the low-power problems.

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73

Evan

AC9TU

Re: NBFM (Was: AM on sBITX?)

#114140

Hi Evan,

I maintain this fork of it (just compilation fixes):

and packages for arm64 (run on any 64 bit image):

- Rafael

Show quoted text

On 10/31/24 10:00 AM, Evan Hand wrote:
Hi Rafael,
Thank you for the feedback.? I will look into it.
73
Evan
AC9TU

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Re: NBFM (Was: AM on sBITX?)

#114139

Hi Rafael,

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Thank you for the feedback.? I will look into it.

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73

Evan

AC9TU

Re: NBFM (Was: AM on sBITX?)

#114138

Do it does not require I/Q. It works pretty fine indeed, already tested.
: )

Show quoted text

On 10/30/24 9:43 PM, Evan Hand wrote:
Hello Rafael,
I believe that the csdr libraries require an I/Q (90-degree phase shifted) signal.? The sBitx does not have that available unless code is written to do the Tayloe decoding in software. That could be easier than what I am suggesting.? I do not have the skills to do that from scratch.
I just got my DE working again, so I will try my suggestion after I have upgraded the software to JJ's 64-bit version.? That may be a couple of weeks as I do not get much radio time with the support needs of my wife after knee replacement surgery.
73
Evan
AC9TU

OpenPGP_signature.asc

Re: White screen on powerup #ubitxv6 #uBITX_V6 #ubitx-v6 #ubitxv6-help

#114137

I will post the website name only if i wont get into trouble with the forum. HI HI

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just the name? and no .com,or .org etc

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73

David

ac9xh

Re: White screen on powerup #ubitxv6 #uBITX_V6 #ubitx-v6 #ubitxv6-help

#114136

Tomasz

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Good info. I just found a 4 inch tft unit same as the one we all receive from hfsignals but only in a 4 inch screen. i ordered one and going to connect it. probably will have to alter some code i imagine .doubt i get lucky that its plug and play. might give it its own regulator for power .depending on the current draw after hooking it up

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D-FLIFE High-Quality 2.4"/2.8"/3.2" /4.0" RGB TFT Touch Screen Module with White LED Backlight, 240x320 Dots, 5V/3.3V Compatible, for Arduino R3/Mega2560 - SPI Serial Interface, 6-Hour Standby Time

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$16.99

Model:

?ILI9341

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Has the exact pin designations on this one so it will be easy to hook up. Pins are on same end too. didnt bother reading whether the pins on this one line up with the display on the ubitx.

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73

David

ac9xh

Re: sBITX 64Bit Pi Image Available #sBitx

#114135

On Wed, Oct 30, 2024 at 09:28 AM, Kevin wrote:

I'm curious if this choice will impact the sbitx app.

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Please do not switch to Wayland Compositor as it will reconfigure some things on the Pi making it unusable for some. The new 64 bit image I am working on will include WC after further testing.

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Re: sBITX 64Bit Pi Image Available #sBitx

#114134

I switched and saw no issues and/or differences! As it says it is easy to switch back.

Re: NBFM (Was: AM on sBITX?)

#114133

The frequency differentiation method would be able to approximate the phase difference by using consecutive I samples. But the demod product would probably be pretty crappy at best.

I think that the transform method should at least be able to simulate a phased Q sample which may be a bit better as a starting point. I messed with this a while ago when I was offloading a synthetic IQ stream to SDRAngel.

it almost worked, but I lost interest in the challenge..?

Re: sBitx CW keyer problems and idea for solution #sBitx #sBITX_v3 #cw #firmware

#114132

There was a commit on 8 July called "Merging the CW keying time lag fix".  Did you notice any improvement?

Mike

Show quoted text

For the CW operators here ... have you had any problems with the sBitx CW
keyer?

The timing seems off for me when keying at higher speeds, and the TX isn't
quite right even using an external keyer. I took a couple of videos showing
what I mean:

Using an external keyer at 25 wpm, the dits are much more staccato than they
should be and sometimes entirely cut off. The TX is bad enough that the RBN
will not pick up my call when using the external keyer:

Re: sbitx, turn off TX audio.

Marshall Harrison

#114131

Turn down the side tone.

Marshall Harrison,?

W4MKH

On Wed, Oct 30, 2024 at 3:46?PM William Hemmingsen via <lee.hemmingsen=[email protected]> wrote:

Show quoted text

Is there a way to turn off the TX audio when running ft8, wjst-x etc?? It's not controlled by volume and annoying.

Re: NBFM (Was: AM on sBITX?)

#114130

Hello Rafael,

?

I believe that the csdr libraries require an I/Q (90-degree phase shifted) signal.? The sBitx does not have that available unless code is written to do the Tayloe decoding in software.? That could be easier than what I am suggesting.? I do not have the skills to do that from scratch.

?

I just got my DE working again, so I will try my suggestion after I have upgraded the software to JJ's 64-bit version.? That may be a couple of weeks as I do not get much radio time with the support needs of my wife after knee replacement surgery.

?

73

Evan

AC9TU

Re: sbitx, turn off TX audio.

#114129

Thanks

Re: sbitx, turn off TX audio.

#114128

开云体育

Set sidetone to 0

Show quoted text

From: [email protected] <[email protected]> on behalf of William Hemmingsen <lee.hemmingsen@...>
Sent: Wednesday, October 30, 2024 12:46 PM
To: [email protected] <[email protected]>
Subject: [BITX20] sbitx, turn off TX audio.

?

Is there a way to turn off the TX audio when running ft8, wjst-x etc?? It's not controlled by volume and annoying.

sbitx, turn off TX audio.

#114127

Is there a way to turn off the TX audio when running ft8, wjst-x etc?? It's not controlled by volume and annoying.

Re: esp32 vs Raspi Pico

#114126

the unit I am making iof for 2m or 6m right now so I have to use the si5351

Show quoted text

On Wed, Oct 30, 2024 at 10:32?AM Ricardo Suarez via <elu9da=[email protected]> wrote:

The Raspberry pi pico.?

Programmable i/o pins can generate frequencies from 0 to 30 mhz without use SI5351 or AD98xx dds even in quadrature for tayloe mixers....

Rick LU9DA

El 30/10/2024 a las 13:38, Richard Neese via 别蝉肠谤颈产颈ó:

What is the preferred?board between these 2 for building a vfo ?

Re: esp32 vs Raspi Pico

#114125

I have used PIO on the PICO and noticed clock jitter with a clock at 7MHZ. Gets worse as the clock frequency increases.

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Barry
K3BO

Re: NBFM (Was: AM on sBITX?)

#114124

Or even with the use of a library for demoding nbfm, like csdr.

- Rafael

Show quoted text

On 10/30/24 9:08 AM, Evan Hand wrote:
The FFT transforms should make it possible to decode/encode the FM deviation from/to an audio signal.? The encoding process zeroes all the frequency bins and then places a value in the bin that corresponds to the audio level.? Decoding involves finding the peak in the frequency domain and converting it to an audio level.
The above is a thought experiment so that I could be wrong.
73
Evan
AC9TU

OpenPGP_signature.asc

Re: esp32 vs Raspi Pico

#114123

开云体育

The Raspberry pi pico.?

Programmable i/o pins can generate frequencies from 0 to 30 mhz without use SI5351 or AD98xx dds even in quadrature for tayloe mixers....

Rick LU9DA

El 30/10/2024 a las 13:38, Richard Neese via groups.io 别蝉肠谤颈产颈ó:

Show quoted text

What is the preferred?board between these 2 for building a vfo ?

Re: sBITX 64Bit Pi Image Available #sBitx

#114122

I'm curious if this choice will impact the sbitx app.

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