[RF hardware limitation] Freq 390MHz Locked

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pu7vll
Posts: 2
Joined: Mon Nov 18, 2019 3:08 am

[RF hardware limitation] Freq 390MHz Locked

Post by pu7vll » Sat Jan 25, 2020 1:15 am

good night, with the native radioditty program, I heard commercial frequencies in the range of 390 mhz onwards. When disabling the bandwidth limit, I am unable to subscribe to the 393,000 freq. Would anyone have any tips on how to resolve this?

VK3KYY
Posts: 7486
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia

Re: Freq 390MHz Locked

Post by VK3KYY » Sat Jan 25, 2020 4:05 am

The RF hardware can't technically operate below 400Mhz in the UHF band.

Its possible that your radio may in operate outside of the frequency range for the RF chip, but if we were to change the range that people can select, we would probably get bug reports from people when their radio did not operate on those frequencies because their RF chips didnt work on those frequencies.

Code: Select all

const frequencyBand_t RADIO_FREQUENCY_BANDS[RADIO_BANDS_TOTAL_NUM] =  {
{
	.minFreq=13400000,
	.maxFreq=17400000
},// VHF
{
	.minFreq=20000000,
	.maxFreq=26000000
},// 220Mhz
{
	.minFreq=40000000,
	.maxFreq=52000000
}// UHF

pu7vll
Posts: 2
Joined: Mon Nov 18, 2019 3:08 am

Re: [RF hardware limitation] Freq 390MHz Locked

Post by pu7vll » Mon Jan 27, 2020 1:11 am

Good night, I understand but the question is: wouldn't the radio be able to simply have RX on this frequency without TX? In the original firm I can put that frequency to listen

VK3KYY
Posts: 7486
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia

Re: [RF hardware limitation] Freq 390MHz Locked

Post by VK3KYY » Mon Jan 27, 2020 1:23 am

pu7vll wrote:
Sat Jan 25, 2020 1:15 am
good night, with the native radioditty program, I heard commercial frequencies in the range of 390 mhz onwards. When disabling the bandwidth limit, I am unable to subscribe to the 393,000 freq. Would anyone have any tips on how to resolve this?

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