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Yes, just declare the cal complete without doing the isolation. Dave - W?LEV -- Dave - W?LEV

does that mean i just leave both ports open and skip to the next step?.

Many times, it's appropriate to skip the isolation cal. Even professionally, HP (the 8753C) gives one the choice to specifically skip isolation. If you do conduct the isolation cal, terminate both

tekguy, You should connect 50 ohm loads to both connectors. If you have an attenuator of 10 dB or more, that can be used as a reasonable 50 ohm load. --John Gord

Oops, my fault. The correct link is https://www.youtube.com/watch?v=sVoxQtiV7cY&t=6s <https://www.youtube.com/watch?v=sVoxQtiV7cY&t=6s>. The short video lasts for 6:25. Many apologies, Robin,

Hi,what do i do during the cal when it gets too the isolation?,ive seen a few vids but its not clear,do i connect the 50 ohm load to ch 0 or leave nothing connected to that port,or put the load on ch

The-F model has a 4 inch screen with either the rocker switch or pushbuttons depending upon models. Hugan made an original VanoVNA that was small and had the rocker switch. *Clyde K.

interesting as much as i look my old eyes can't find that part at what timestamp in the video does he do that

hi Ive a authentic hugen vna years old still works fantasticand ive just switched it back on, ive had this problem before and Roger Need told we what to do. i only use this for swr tests and need to

Garry, 'twas ever thus! /Caveat emptor!/ 2 things: 1) you might have had better luck with the antenna if there had been a coax choke immediately before the antenna feed. Even with lots of radials,

The fat traces are just reflecting noise within the system. Do an average to mostly eliminate the "grass". Dave - W?LEV -- Dave - W?LEV

That's exactly what it would be.

Chuck, given the amount of green on the traces, it looks as if there have been several measurements taken at each frequency. What the graph then shows is the variation from one measurement, at a

Dave, The S21 data shows up under the Marker Data for all S11 sweeps. The software does that...not me...8^) I'm selecting only S11 options. I showed only 1 marker for my question. Two others at 28.1

"W0LEV" <davearea51a@...> wrote: I suspect that the S21 value is just the leakage or noise level in the through path detector. -- Brian G8SEZ

How did you measure S21 on a dummy load? A dummy load is a single port device. Possibly you have attenuators which are 2-port devices? Actually, the data doesn't look too bad at all for HF or even

Puzzled? I'm checking several dummy loads and get some sweep traces as shown in the attached: If I were to see only the marker data I would conclude I have a good device. But the strange traces

Same here. I use my NanoVNA H4 for a lot of things, but I have used it in analyzing and tuning antennas for all the ham bands from 475 kHz through 1296 MHz. Zack W9SZ wrote:

For outdoor use, the NanoVNA-F screen is much more readable. I started with a 2.8 inch -H and could not read it outdoors to tune my vertical antenna. I had to go inside and to the other end of the

Nano VNA-F works fine for me. -- ALVARO, EA8ARX