jdobbs2001
Member
- Joined
- Apr 20, 2005
- Messages
- 222
8992 every time they transmit those sky king messages it sounds like they are using one of those cb echo mikes. Is there a reason for the poor echo audio?
The reason you hear the echo is because you are hearing multiple sites transmitting the same message.8992 every time they transmit those sky king messages it sounds like they are using one of those cb echo mikes. Is there a reason for the poor echo audio?
Uh. No.I believe thats the signal travelling around the world and back again. Not an echo mic.
If you are referring to the HF-GCS system and EAM messages, the operator is transmitting on multiple sites world wide.
The poor audio is that the "technicians" trained in the military fashion do not know how to balance the audio going to multiple transmitters per site and to those multiple sites.
Simulcast transmissions require very time consuming and exacting adjustments that change every time anything in the system changes. When running the audio through copper, fiber, satellite and who knows what other methods, each step has to be balanced and adjusted then the previous step has to be re-adjusted and the following adjusted etc. etc. etc.
Just one of the fun things to get used to listening to utility HF.
Bruce
That depends the specific techs, but I would agree that most operators are not given that training. My training included such tasks, although I could only control the equipment at the facility I was working in.The poor audio is that the "technicians" trained in the military fashion do not know how to balance the audio going to multiple transmitters per site and to those multiple sites.
Bruce
If this was VHF+, I'd be more inclined to agree, but I wonder being HF, if making a set of adjustments that lasts is even possible. Given propagation delays, is it realistic to be able to adjust the timing as such? We are talking about hundreds+ miles between listeners, day vs night, maybe short path vs long path, etc.The poor audio is that the "technicians" trained in the military fashion do not know how to balance the audio going to multiple transmitters per site and to those multiple sites.
Simulcast transmissions require very time consuming and exacting adjustments that change every time anything in the system changes. When running the audio through copper, fiber, satellite and who knows what other methods, each step has to be balanced and adjusted then the previous step has to be re-adjusted and the following adjusted etc. etc. etc.
Sez you!The reason mentioned below is the one and only correct explanation.
prcguy
Let me apologize right now for this being a long post, there really is not a short way to discuss it.8992 every time they transmit those sky king messages it sounds like they are using one of those cb echo mikes. Is there a reason for the poor echo audio?
I would agree. Considering that the echo does not detract from overall readability of the transmissions, and having multiple transmitters goes a long way toward making the network relatively immune to propagation conditions (compared to a single transmitter), it doesn't make sense that they would expend any effort to suppress it at the transmitter end. Echo suppression devices have existed for decades, and it's always possible that echo suppression is being applied at the receiver end.In my opinion the most likely reason for this echo is network latency.
I agree, that is most likely. I have seen/heard some serious variations in arrival times, when using multiple intersite pathways....
In my opinion the most likely reason for this echo is network latency.
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T!
Sez you!