Lock out AMSAT Freq's 435 - 438

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n6cid
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Lock out AMSAT Freq's 435 - 438

Post by n6cid » Fri Sep 27, 2019 5:35 pm

Any chance the OS2 crew could lock out the AMSAT freq's 435 - 438 in one of the updates?

So many hams use hot spots smack dab in the middle of the AMSAT restricted channels.

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VK7HSE
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Re: Lock out AMSAT Freq's 435 - 438

Post by VK7HSE » Sat Sep 28, 2019 6:31 am

Not helped that the original openspot is setup on 436MHz. But totally agree that it should have a system in place to prevent any transmission between 435-438MHz

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vocoder
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Re: Lock out AMSAT Freq's 435 - 438

Post by vocoder » Fri Oct 04, 2019 3:49 pm

Is it really SharfRF's responsibility to protect hams from themselves? Your post got me curious though. Yesterday I pulled the TX frequency of all 14,802 hotspots connected to Brandmeister. A summary is attached.
Attachments
Brandmeister Hotspot TX Freqs - Oct 3 2019.jpg

n6cid
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Re: Lock out AMSAT Freq's 435 - 438

Post by n6cid » Sun Oct 06, 2019 4:10 pm

As you know we are suppose to be self policing...
When a request was sent to the pi-star programmers they locked out those freqs.
Just a simple request.

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vocoder
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Re: Lock out AMSAT Freq's 435 - 438

Post by vocoder » Mon Oct 07, 2019 4:59 am

The "pi-star programmers they locked out those freqs", they did not. I just switched over on my Pi-Star.

Tyrbiter
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Re: Lock out AMSAT Freq's 435 - 438

Post by Tyrbiter » Mon Oct 07, 2019 12:53 pm

vocoder wrote:
Mon Oct 07, 2019 4:59 am
The "pi-star programmers they locked out those freqs", they did not. I just switched over on my Pi-Star.
They have done so if you use the mmdvmhat firmware for things like Jumbospot, Zumspot, DVMega etc. which use Andy CA6JAU's modem code.

For other hardware, bets are off.
Brian

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VK7HSE
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Re: Lock out AMSAT Freq's 435 - 438

Post by VK7HSE » Mon Oct 07, 2019 4:03 pm

Code: Select all


// Disable frequency bands check
#define DISABLE_FREQ_CHECK

// Disable frequency restrictions (satellite, ISS, etc)
#define DISABLE_FREQ_BAN

Is located in Config.h of the mmdvm_hs firmware. This is where the frequency check/block can be disabled by the end user if they desire. It is however enabled by default and you will need to compile your own binary to flash to the board.

Let's not forget that satellite communications doesn't require much power, and it's most likely ones hand-held radio is the culprit not so much the hotspot (5w vs 10-20mw) But as most countries prohibit terrestrial communication in the satellite portion of the band it's best to simply stay away from 435-438MHz all together!



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