Illigal Satilites And Elt

[Airplay]

Some satellite TV services also have satellite internet available. (Like StarBand) These systems receive AND transmit signals via the satellite dish.

Even though the carrier frequncy is quite high (10 to 30 GHz) it is a digital signal that tends to be quite noisy and capable of spewing much lower frequecies that are equal to, or a harmonic of the modulating frequency, which varies with the data stream.

Furthermore, the cable modems that connect to the satellite receivers use between 68MHz and 850MHz as the downstream and upstream modulation frequencies. This encompasses the 121.5 and 243 MHz operational range of ELTs.

So...all you need is a crappy connection to your cable modem and you have a possibility of transmitting enough radio frequency energy to be mistaken for an ELT signal. You have to remember that ELTs only put out a couple of hundred milliwatts at full power, so a tiny well aimed signal from your cable can cause false alarms.

Yes. It's possible, but I question the numbers. The vast majority of ELT signals heard (about 99%) are false alarms. This has been the norm for years. Even before satellite TV was abundant.

 

[Bullet Remington]

Man. I'm FUBARD! Posted in the wrong topic!! Geeez, that freakin Old-Timers really kickin in!!

 

[Bullet Remington]

Oh, Man! Disregard previous pot, except for the FUBARD and the Oldtimers! Better add BER to the comment in the previous post as well!!

Crikey!

Fly Babe: I've always wanted to say this... "Thanks, BABE!! 😉 😉

Twotter:

Ur of course, correct! And now that you've mentioned it, the last 5 attempts to post here proves it beyond a shadow of a doubt!!

BR

This is teerible, I cain't spoll werth a hoot!! Better make it 6 attempts. I'm going T.U!! :wacko: :wacko:

 

[Charles W.]

Bullet :

If you wank to often that will also make your thinking fuzzy.

 

[graunch1]

I doubt that a digital modem signal on 121.5 or 243.0 would sound much like the swept analog tone of an ELT. Of course, anything is possible but it sounds more like a theory that needs a home :wacko: rather than anything in the real world

 

[Bullet Remington]

Padre:

I'm not an expert on that subject, yet, so I'll defer to you experience, and of course age, and let you define " too much." 🙄 🙄

 

[Airplay]

I doubt that a digital modem signal on 121.5 or 243.0 would sound much like the swept analog tone of an ELT.

We're not talking about strictly ELT signals. I should have made that clearer in my previous post. These are international aviation emergency frequencies that aren't restricted to ELTs. Anyone who is experiencing an aviation emergency can transmit on these frequencies using whatever kind of modulation they want....even if they want to mimic an ELT and whistle. Although transmitting their last known coordinates might be a tad more useful.

🙂

 

[graunch1]

Well actually you are right, you can transmitt anything you want..provided it is AM

not FM,Digital,PAM,PEM,DPSK,FRSK or Elbonian digitally encrypted Dilbertian modulation 🙄

 

[Airplay]

not FM,Digital,PAM,PEM,DPSK,FRSK

Why not? Either would still break the squelch on an AM receiver. AM receivers don't discriminate much. That is one of their weaknesses.

Try holding an AM radio up next to your computer.

 

[graunch1]

Hard to drag that COSPAS/SARSAT bird down into my office 🙄

 

[downwash]

Once we're using the 'Spell Check,' we can start on the 'Grammar Check,' can we not #####? 😉 B)

 

[Pratt]

#####,

Have you used the Starband satellite internet system that you mentioned. I was looking for info on it, how well it works etc.

Thanks

 

[Swamp Donkey]

I had the Express-Vu internet card, but it was download only. You still had to have a phone line for uplink.

Worked pretty slick though...had great download speed (400-800Kb), but not as fast as a cable modem of course!

If anybody needs a card I still have mine. Not using it anymore.

 

[Charles W.]

I get six porn channels on my illegal card.

And then I have a wide choice of religious channels to go to to repent for the lustful thoughts that those wicked porn channels corrupted my mind with.....

Reverend Chas W.

 

[Pratt]

It appears that Starband is only available in the US. Anyone know of a similar system, reasonably priced, in Canada. For around the YOW area.