Using FLDIGI. I get a fair picture, but there is some banding. (dark lines) How do I adjust this out of the picture?.
Thanks in advance.
It depends what you mean by "banding". Due to the nature of HF, you will get some black lines from time to time, usually due to lightning crashes, unless you have a VERY strong and steady signal. An image of what you're seeing may be useful.
Remember, most fax transmissions run at 120rpm, meaning they're painting 2 lines each second; one good noise crash or fade and you will have lines on the image...it is the nature of radio.