Re: Not recieving packets when car is on
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Allen, it is a bad practice to keep the wanted signal as low as possible, in contrary to make it immune to noise you should krank it up all the way that the system can process, in this case 800mV. I also doubt that audio volume will change with power supply voltage, this would imply the audio circuitry is directly powered through the power supply, which is a poor design. But one cannot rule this out.
You may be right. What would I know about it??
73,
Allen AF6OF
-----Original Message-----
From: Geoffrey Merck <f4fxl@...>
To: [email protected]
Sent: Fri, Dec 16, 2022 6:59 am
Subject: Re: [TinyTrak] Not recieving packets when car is on
Nice to see there are more and more people following my instructions for Bluetooth :)
Regarding the audio level, I once analyzed the TT4 schematic and found out that the best audio levels for proper decoding is about 800 to 900mV peak to peak on noise.
Allen, it is a bad practice to keep the wanted signal as low as possible, in contrary to make it immune to noise you should krank it up all the way that the system can process, in this case 800mV. I also doubt that audio volume will change with power supply voltage, this would imply the audio circuitry is directly powered through the power supply, which is a poor design. But one cannot rule this out.
Do you have another radio you could test with? Or even an APRS enabled HT ?
?
?
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Geoffrey F4FXL / KC3FRA
My Tinytrak Stuff =>
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