The n2pk vna archive also has information how to subscribe to n2pk vna mailing list, so that you could learn from and exchange information with others about. Bock diagram of sparameter test set with optional vna vhfuhf transverter fig. Unfortunately the original n2pk software and utilities are not able to work with usb but. Most hobbyists use crystals as an external clock signal for a microcontroller.
This is a homebrew vna capable of both transmission and reflection. Tomas baier, dg8saq, has a software called vnwa that he wrote for vna of his own design, but that software also supports n2pk vna hardware. Dos package by paul kiciak, n2pk myvna with usb support by dave roberts, g8kbb vnwa by tomas baier, dg8saq. Its schematic, with the ports numbering used for the following. The software can also control an n2pk vna via lpt or via the usb. Expanded n2pk vna block diagram without sparameter test set fig.
A simple series tuned circuit measured in reflection mode. The left schematic shows the fundamental design of the dg8saq vnwa. The v5 pcb is the result of logical development of the project and trends in the computer industry. The filter circuit is exactly the same as for the original filter connected to pin 20. Parallel ports are becoming less common in portable computers which are often used to host the n2pk vna software, and usb type interfaces now dominate. Expanded n2pk vna block diagram with sparameter test set fig. Pc boards are available, including windows software developed by ian g3sek. Designing a crystal ladder bandpass filter hackaday. A less common use would be to make a bandpass filter bpf for. Paul kiciak, n2pk says on his website about his vector network analyzer. Software a large part of the instruments functionality is dependent on the software which is freely downloadable. The new vna pcb with usb support meets these demanding requirements. Unlike this page, my n2pk vna project is complete now, it took me three years to get round.
Depends on direct digital synthesis of test signals and accurate phase detection. Its described by n2pk on his website, in the 2nd part of his vna documentation. Paul kiciak, n2pk has produced a most excellent vector network analyser to go with it, i have produced a usb interface and a gui for windows myvna, but the n2pk is a group effort. The n2pk web site was shut down in april 2020 and all information was transferred to this site in a form of browsable archive on behalf and with permission of the owner, paul kiciak, n2pk.
This document is intended for people who have built an n2pk vna and are having difficulty. Block diagram of the single fast detector n2pk vna fig. The software application my vna by dave roberts g8kbb. Run the software and watch the signal changed once you vary it from the software. Refer to the vna schematics for the values of the output signals. Changes to the schematics there was little change compare to the original dual detector vna schematics from paul n2pk, and it was done to the lo dds second output pin 21 of u120, which received its own antialiasing filter. Currently there is no problems with the transverter software. He has made a wonderful contribution to home experimenters with this excellent circuit design. This web page documents an addition to an n2pk vna for standalone use. Subsequent posts will describe the circuit and construction. The n2pk vna archive also has information how to subscribe to n2pk vna mailing list, so that you could learn from and exchange information with others about hardware builds, troubleshooting techniques, part replacements, software use, etc. Hf vector network analyzer performance element14 wireless. For more information, check out the yahoo group page you can get a feel for myvna from the manual. Since the vna was first introduced, there have been some changes done to the schematics and i decided to take the challenge and make a board layout that would reflect all changes done to date.