I think the tx bandwidth is dependant on the input signal and is dynamic, rather than a static/fixed factor.Well done video; but he could have gone into greater detail than he did.
25k wide is just too wide. He (the designer) really should have made the width adjustable - IMO. 5 or 6K wide is really enough to get the net effect.
I want to say MMM limited his to around 10k max.
I think the tx bandwidth is dependant on the input signal and is dynamic, rather than a static/fixed factor.
73
~Happy New Years!~
I believe its $600 plus. As I mentioned I know very little about radios and the way they work but have read the description on asamoyds eBay page several times and there is an adjustment. What that adjustment is for I don't exactly know but you can tell the seller where you would like it set and they will set it at that particular setting. They offer three different radios with that board pre-installed. I think the others are in 959 and a cobra am only rig which is the cheapest of the three. The striker is the most expensive of all their pre-installed ones. I think the board itself is a little bit below $300 but don't quote me on thatGood video, but Mike tends to ramble a lot. If you look at the start of the sweep, this board generates a TON of harmonics. It needs to be followed by a filter with a really sharp rolloff to keep the audio within the 10Khz bandwidth of a cb channel. As a straight CB, I'll bet this thing will sound incredible with a broadcast quality mic and a studio mic preamp capable of 2v output driving it. Of course, most users could care less about bleedover, and will probably run it "balls to the wall". Even then, a filter should be used with the rolloff at 10 - 12khz, because anything over that is inaudible to the human ear (as he demonstrated) .
What I don't understand is why it's called "ASYMOD." Looking at the waveform on the scope, it looks perfectly symmetrical. Maybe there's an adjustment on the board for asymmetry, but Mike didn't show it. I guess I need to look at the ASYMOD website to see the exact capabilities of this board. All in all, looks good. Wonder what it costs ???
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25k wide is just too wide. He (the designer) really should have made the width adjustable - IMO. 5 or 6K wide is really enough to get the net effect.
Good video, but Mike tends to ramble a lot. If you look at the start of the sweep, this board generates a TON of harmonics. It needs to be followed by a filter with a really sharp rolloff to keep the audio within the 10Khz bandwidth of a cb channel. As a straight CB, I'll bet this thing will sound incredible with a broadcast quality mic and a studio mic preamp capable of 2v output driving it. Of course, most users could care less about bleedover, and will probably run it "balls to the wall". Even then, a filter should be used with the rolloff at 10 - 12khz, because anything over that is inaudible to the human ear (as he demonstrated) .
What I don't understand is why it's called "ASYMOD." Looking at the waveform on the scope, it looks perfectly symmetrical. However, Mike didn't modulate it anywhere near 100%, so I guess I shouldn't expect any asymmetry. Maybe there's an adjustment on the board for that, but Mike didn't show it. I guess I need to look at the ASYMOD website to see the exact capabilities of this board. All in all, looks good. Wonder what it costs ???
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Think it is limited (by what I've read/heard/watched) to the freq response of the mic and whatever outboard gear is being plugged into it. Didn't see him adjust anything except the freq feed from the sweep gen into the radio. In fact, he even pushed the envelope and put 10hz-35khz audio, and the radio still transmitted it. It needs some limiting or adjustment capacity - IMO . . .It is adjustable. The width is dependent on the maximum audio frequency you feed into it. If you want 5-6khz max, limit your audio input to 5-6k and there you go.
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