Steve, Be sure your MSA is powered up before you start the software, because some initialization is done when the software starts. At that point, the DDS...
Hello everyone, I just read this threat, and I realise that you like to migrate to other language. I just begin to make it in Python with wxpython, because we...
Hi Steve, All that Sam said is right on. You may be seeing a sine wave at DDS pin 9 if your o'scope is not at least a 100 MHz scope. Even with a low freq...
Hello everyone, the repository to the Python version of the program is in http://www.miginternacional.com/~juanfe/pyslim.git, to retriew the file you could...
Thanks both of you for the advice. The peak-to-peak level of the MO output is about 2.4 volts when terminated at the scope input with a 50 ohm load. Is that...
If you have 2.4 Vp-p with 50-ohm load, you are right on target. And the scope bandwidth explains the sine wave appearance. So if the DDSs are not putting out...
Folks, I managed to find a UK supllier who can do 30mm X 30mm of 0.55mm thick copper squares which can then be used to enclose the individual slims. 30mm is...
I have integrated my IF2 and microwave sections in my brass box, using a temporary 2-resonator cavity filter. Everything seems fully operational, except that I...
Hi Guys, I just purchased a couple of crystal filters on ebay. One of which I intend to use as one of my filters for the SLIM SA/TG/VNA. At least at first, to...
Hi Folks I still have some similar 10.7MHz crystal filters that would be suitable for the SSA. They are 8 pole 3db bandwidth 7.5KHz QMF10725 and 8 pole 15KHz...
This note is aimed at those constructors who purchased the ExpressPCB panels through the group buy that I undertook a few months ago. I have found on one of...
Geoff, On coax connector pads, the bottom pad around the hole serves no useful purpose; whether using direct-solder or actual SMA connectors, the solder...
Hi Geoff, I bought two of the ExpressPCB boards during the group buy. One of the boards is yet intact and, upon inspection with a magnifying lamp, I found no...
For months I have been focused on getting the MSA hardware built. Occasionally I got diverted by the real world, which slowed things down. Meanwhile, I knew...
Thanks for the suggestion of removing the island around the coax centres on the ground plane side, I have now been through all the SLIMs and done that. I am...
Geoff It would be easy and probably more useful to provide an external output for the auxiliary output (J3) of DDS1 and/or DDS3. The percentage error in those...
I have built a top and bottom for my box. The bottom is just PCB material screwed onto the brass angle that is mounted on the box bottom. The top is also PCB,...
is this a problem we could be having with the scottalizer? dave ... Subject: [N2PK-VNA] Re: VNA 4.1 Detector 2 glitch Date: Sun, 07 Dec 2008 22:52:37 -0000 ...
Hi Dave and All, This is an interesting question. I have run the MSA(s) on 3 different computers with 98, 98SE, and 98ME. I don't have XP. As the builders...
Hi can anyone tell me why frequency accuracy, drift for the 64MHz clock mentioned in regards the spectrum analyser is of importance? I am a little unsure as to...
Hi all Not the Dave who posted the query to the group - this is one of the other Daves from the N2PK group..... What will happen is that Windows will...
Good question. It's partly a matter of the MSA displaying true frequencies at the markers. If you're trying to pin down a signal peak, this may be important. ...
I use Windows 2000. There is a pause during my scans. I assumed that was the MSA software, but maybe it is this polling issue. Can I use the XP fix method, or...
For WinXP it would be interesting to try in "System Properties" - "Hardware" - "Device Manager", "Printer Port (LPT1) Properties" - "Port Settings" (if you...
Hi, I'm almost finished with the soldering of my SLIMs. Now I plan to turn everything on, but I didn't see any guide or testing protocol for each SLIM. I...
Hi everyone, I apologize in advance for this not being _directly_ spectrum analyzer related. This question has been nagging me for a while and I haven't been...
Hi William,  Don't apologize, that's a great question. The parasitic effects of the ground sides depend on many factors. Trace thickness, board material Er,...
Hi Juan, At this time, there is no formal verification of individual modules. This is on my "things to do" list. (along with a lot of other things) Hook them...
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