Posted: 6/23/2014 12:49:44 PM EDT
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I have a Ham Radio question that I don't think I have ever heard addressed before. I came to this question while investigating amateur satellites and how to make contact with them.
So the question is, is it legal to transmit simplex using split frequencies? For instance, if I was to program one HT to transmit on 147.450 and to receive on 445.950. Then program a second HT to transmit on 445.950 but receive on 147.450, would this be illegal? Basically it would result in someone else monitoring to only hear half of a conversation unless they knew what the frequency split was and tuned in accordingly. |
Where is the satellite part? 
My wouxon will let you program splits like that. TX 2m RX 70cm and vise versa. That is how I got my first AO-51 QSL. Don't quote me but I want to say spread spectrum is good to go 440 and above. I know it is on 900MC. Freq hopping/spread spectrum is something I think is neat. Although with SDRs today slow SS hops are pretty easily solved. |
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Does the person transmitting have license privileges on the frequency they are transmitting on? If I understand the OP correctly, it doesn't mention frequency hopping, only using different bands to tx/rx on. As previously stated, that is how many (if not all) of the amateur satellites operate.
So, both parties having a tech license could transmit on either 2m or 440. You could even have an unlicensed person that listens in and it would be OK. I haven't heard anything about having to get a response on the same freq/band. If that was the case, everyone calling CQ without a reply would be violating. |
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@ Yup SS is authorized down to 440. I get get the OP wasn't directly asking about SS but it might interest him. |
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Quoted:
I have a Ham Radio question that I don't think I have ever heard addressed before. I came to this question while investigating amateur satellites and how to make contact with them. So the question is, is it legal to transmit simplex using split frequencies? For instance, if I was to program one HT to transmit on 147.450 and to receive on 445.950. Then program a second HT to transmit on 445.950 but receive on 147.450, would this be illegal? Basically it would result in someone else monitoring to only hear half of a conversation unless they knew what the frequency split was and tuned in accordingly. Known as half duplex unless both TXs are keyed all the time then full duplex. 73, Rob |