Started doing some research on a VNA. I have read a few threads but still have some specific questions about them. Thanks in advance for any suggestions and answers. 1. I have always used an MFJ-359 for SWR msmts. Will a low cost VNA do the same? 2. Can I narrow any sweep down to band only, or even portions of the HF bands to "see" SWR sweeps 3. Are all cheap ($50 to $150) VNAs the same. Do they all have internal signal generator for making msmts without any external TX source (like the 359)? Don't need anything greater than 450MHz BTW. I'm familiar with most test equipment - TDRs, SpecAns, etc., - (lifelong profession) but have not ever used, or seen, one of the new cheapie VNAs. I don't need to do lab type research. I just want to see what the antenna/line is doing across a frequency range. Thanks again!