Hi Scotty, It has been 2 months since I have bugged you, but here I go again. I'm having a weird problem with my system. I have performed a preliminary...
Hello Sam, I had a look on your KISS SA and have question. Where did you take your sweep generator from ? Did you build it by yourself ? Do you have a...
Vaclav, The Simple Scalar Network Analyzer is step one of my project, and I just used a sweep generator from eBay. I figured that for starters, anyway, every...
Hi All, I mentioned a while ago that I had designed a device would allow transmitting data to SPI devices by pushing a series of 0's and 1's. I have revised...
Hi Jim, Send me your program, just the way you are running it. Ie, all the user options plugged into the global variables. Send it as an attachment to an...
Hi Scotty and All, I just posted a file under the name VNA_ReflectionBridge. This is a simple board for use in the upcoming VNA as the interface between a DUT...
I am currently building a spectrum analyser based mainly on Scotty's design and Sam's AGC loop. Having built several of the modules, I am now ready to fix them...
Hi Andrew, Ground loops are always a concern, especially when extrememly low signals are being measured. If you are using voltage regulators in each module,...
Hi Andrew: I can only address the AGC loop issue. The most critical part is that the two AD8330 modules (if you are using two) be well connected and shielded...
Hi All, As promised, but certainly delayed, I have finished the first form of software to operate the MSA/VNA. I still have things to add to it and I will...
Hello, Many thanks for your replies on this - your help is much appreciated. I already have a main regulator in the power supply which will feed all the...
... ver. 4.16r1 lite but I receive an error "invalid data in file" .It is something rong with this file ? I load the other *sch from forum files and work well....
Hi Cristian, The file has to be opened with ExpressSchem, free from ExpressPCB.com. Apparently this program and Eagle use the same extension for their files,...
Hello, File it is OK !I make a mistake trying to open with Eagle. Thank you for your answer.I will study your design. Intresting comments about measure...
Hi I am currently building an amateur radio telescope for Hydrogen line studies. I would like to build a spectrum analyzer that will cover 1420 GHz. I would...
Hi I hope everyone understood my original post - it appears that I did everything possible to make it confusing. The original subject line was mistyped and...
Hi Ed, Here is a quick answer. If you want the spectrum analyzer to cover a narrower portion of 1420, then just change out VCO 1 to one that will tune around...
Hi Ed, You've got me intrigued. First, I believed you really meant 1420GHz because I would have thought that is more where hydrogen spectral lines really are....
Hi All, I have a question for all you internet web page smart people. I am about to lose my ev1.net internet provider. All my web content is on their site....
... Two things I can think of. Maybe someone else with high speed access could download the page for you and upload it to the new site. I have 1.5 Mbps...
Hi Scotty, I have fast download and upload, and a son who knows far more than I do about web site hosting and the like. If you want, I can check with him to...
Here in New York, I have 20Mbps download and 2Mbps upload with fiber direct to my house! (no, that wasn't a typo) Costs a whopping $45/month! Service is called...
Scotty, Apparently since your site has ftp access, all someone needs is the access info and they can download from the old site and upload to the new site...
Thanks, guys. That is a perfect idea. 20 MB download? Holy meggabits, Batman. When I choose my new ISP, I'll get with Eugene or Jerry and have one do it...
Scotty, If you need someone to snapshot your site, let me know... I can use wget and make the file available for download to whoever wants to set up the new...
I snapped a copy of the site on Thursday... It comes out to ~ 9MB or so... I can make a tarball or zip the file if someone else hasn't already taken care of...
Hi Group, I've not had much time to work on my MSA for quite a while, but recently I got back into it. I posted my modified version of Cash Olsen's 120 dB log...
Hi Jim, Sounds like good work. Just a reminder that whatever bandwidth you use for your final IF filter (to establish the resolution bandwidth) should be...
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