Hi All, offering for sale a limited number of assembled and alligned 2m and 70cm Transverter boards for N2PK VNA. For the generic Transverter information see ...
DR Ivan A stupid question : Would a 1200 MHz transverter be really "off limit", or could it be possible to imagine such a vna extension ? I even was...
Hi Mark, the Transverter itself can be extended to 1200MHz if the LO splitter is replaced - the existing one is rated to 600MHz I believe. The BPF becomes a...
Tks Ivan. You are clarifying the problem. The L.O. part is not a big deal, neither the 4 cells cavity filter... I think I can handle that with plumbing gears...
Just a note that both myVNA for Windows and Paul N2PK's DOS-based programs support the transverter mode and scale the X-axis conveniently. Ivan VE3iVM ... ...
Art How does one place an order with you? I assume we pay using Paypal? I need two ad9851's for the dual receiver VNA. thanks tom . (formerly w0lwa)...
Hi Ivan, you could detect e.g. the 3rd harmonic. Then your 60MHz span would turn into a 180MHz span. You could also separate the images by detuning the two...
Hi All, Finally, I have the VNA assembled! I am having problem, I thnik with the parallel port. VNA4Win looks working, I can calibrate, and made some...
Hi Ivan, if you use the 3rd harmonic detection, no change in the VNWA itself neither in the software is required. As far as I know, together with the higher...
Hi Mehmet, Paul's software is DOS software as far as I know. DOS code is not allowed to directly access ports if run under Windows which I assume you do. You...
Hi Tom, So that explains the problem I have had with Paul's software. I find the resolution for the exeter few minutes ago by searching this forum deeply. I...
Mehmet, I had the same problem using Exeter with a couple of XP machines. I installed Userport on my XP desktop and it enabled we to control Exeter via the LPT...
Hi Mehmet, ... You don't mention which Windows OS you are using, so: My software works fine in Windows 98 and earlier without any additional software. In W2K,...
Hi Tom, I still see a difference. Paul used the harmonics produced directly by the RF DDS. A squaring circuit was needed BTW if I got the concept right, ...
Hi Ivan, I try to express my self clearer so you may see what I see ;-) TX output of N2PK-VNA is e.g. 30...60MHz. Following a 1.3GHz transverter, which does...
Hi Paul, I'm using XP. By using dosbox + UserPort, I think it worked. I have some smith chart but not sure, if the parameters retrieved correctly. I had no ...
Hi Mehmet, ... I would expect that either DOSbox or Userport might work but both together should not be needed. Re Smith Charts, I always recommend testing...
Hi Tom, Yes this should work. I may take a closer look when have time. Working via harmonics has a drawback though - time required to do a sweep is much ...
Hi Marc, further to Tom's suggestion to use harmonics mode, I 've done some testing and analysis of my 400MHz Transverter and it appears possible to use it as ...
A new version of VNA4Win, 1.3d, is now available for download from http://www.marsport.org.uk/vna4win/ This fixes certain problems with calibration status and...
Hi, I need to change the file extension's on a large number of files. I think the best way to do this is to use DOS. When I open a DOS in Windows I loose a the...
There are many elegant ways to do it, but a simple way is this. I'm assuming the files are all 8.3 format as you are trying to use DOS.... 1. open a dos box,...
Hi Bob, You might like to try out 'Total Commander' which is available from http://www.ghisler.com/index.htm as a shareware version - I have used it to sort...
Hi Ivan, work with the second harmonic instead of the third, then you get away with 4 sample CDS and you can still sweep a 2ms per datapoint, which should be...
Hi Tom, no thank you, :o) I will let somebody else do it. Also, a good squarer would not produce much of a second harmonic, would not it? regards, iVM...
Hi Tom, ... It's a lot harder to generate the 2nd harmonic and CDS won't work with the 2nd harmonic anyway. The highest usable harmonic for N samples with DFT,...
Hi Tom, I wrote: It's a lot harder to generate the 2nd harmonic I take this back - the 2nd harmonic can be generated by supplying the RF DDS into both inputs...
