Jim certainly knows much more about this than I do, but here are a few random thoughts:
1. When the other guy is sending, you'll see three little green boxes (about 2mm square at the top of your watrerfall, and you should see three white lines descending from those little squares and lined up with them. Do you see that? If not or if they don't line up pretty close, you may be on slightly different frequencies and that can cause problems.
2. In the box above the waterfall, you should see 5 little boxes, about 1/4 in square. All of those need to be green after the first few seconds. If not, but if #1 is OK, adjust your audio levels, either with the RX gain or the soundcard settings. Don't over drive the sound card!
3. In the Box above the waterfall, check "encode 2". Not exactly sure what this does, but it seems to help, tho that may be mostly on xmit.
4. at the bottom of your waterfall, you'll see a "ribbon bar" that's mostly red. It's a progress indicator and should gradually, from left to right turn green as the picture comes in. If you miss segments, you'll see some red marks in it indicating the missed segments. What does it look like?
5. Be sure you have "progressive receive" turned on (in setup).
6. In the box above the wqaterfall, you should see small boxes indicating level and S/N ratio. Are these OK? (S/N greater than 12dB is mostly OK.
I'm assuming you're using FM. If you're using SSB, I suspect a tuning problem. Let the program autostart the pic. The first few segments of the pic are some sort of header, and you must copy them to get the rest of the pic to decode. You'll start out with 4 of the 1/4" boxes green, and once you get the header, the top box will turn green. Thjis is NOT like MMSSTV, where you can start copying a pic in the middle!
I do this mostly on HF, but it should be the same on VHF. If I've made any errors, I hope Jim will correct them for me.
[EDIT]. The more I think about it, the more I suspect one of you is overdriving / underdriving a sound card. Again, assuming this is on FM.
Last edited by k3wrv; 08-14-2008 at 11:58 PM.
Ham radio is something you DO and LEARN. NOT something you BUY!