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Hi hwalker.Very thanks for answering my post & i read before your procedure. So the S11 isn't interesting in the LNA Performance. Regards.

The output power of the SI5351 is automatic set depending the requested sweep frequency, 2mA below 300MHz, 8mA above 300MHz Similar for a manually set fixed output frequency using the freq command You

Hi, Andy, we had the same idea, I measured the output and the frequency accuracy on the weekend. It is very bad if there are 5 kHz difference, e.g. on LF...the band is < 2kHz wide. I have set the

Why not try the following console commands through a script: pause (the scanning - still generates output) now loop the following via a data driven stream... freq 1000000 (wait) freq 1000005 I don't

I just checked my NanaoVNA output and frequency accuracy, utterly superb. Good enough to generate WSPR signals, or simple FSK/CW QRSS signals. The latter are normally send with a 5Hz shift, with a dot

I just measure 100mv peak into 50R at 50Khz to 50Mhz (-10dbm) At 70Mhz it was 70mv (convenient to remember). I was amazed at how accurate the out put frequency was according to my GPS calibrated freq

I think the -10 dBm number is based on conversion of the unterminated voltage. My unit puts out -17 dBm at 100 MHz and -19 dBm at 900 MHz when properly terminated in a 50 ohm load. This level is

Hi Rune: Keep up the great work - you're an indispensable asset! You might try thinking a little bit laterally. Other similar python programs I use (like the qspectrum sdr data analyzer) split the

Hi hwalker Ok with your commercial kit, if I am guessing right you do not have the cal kit data ? The HP male load I have a couple of these and are far from impressed. I have also a BNC special made

That looks the business allright :)

Jeffrey, I've worked slightly more on the ideas you presented, and just pushed an update that makes it *nearly* fit on a 768 pixel screen. It does actually fit, I believe, if you hide the task bar. I

Said, I posted this procedure earlier that I used to check the gain of a RF preamp. The device under test was a Mini-Circuits preamp with a handwritten note saying, "27 dB gain, 1-1000 MHz". Test

Kurt, Thanks for the comments. I am fortunate to have a commercial BNC VSWR kit that came with OSL standards plus various mismatches. I picked it up from an engineer's estate sell and was able to

Very thanks for quick answer qrp.ddc. I made the 2nd manipulation with 20db connected to ch0 & ch1 and turned the Orange & blue traces & have had the S21 & S11.I think i was wrong. The amplifiers are

in order to measure S11, you're needs to put 50 ohm load on LNA output and connect CH0 to LNA input. But first, make sure that your LNA can handle 0 dBm level! If it cannot, then there is no simple

hwalker, you can find adapter delay by connect unmatched terminator and check Group Delay screen. Of course it will also include delay of terminator, but with a series of measurement you can find

Thanks Rune, That makes life much easier. David -- David G Hopkins (VK4ZF) --- This email has been checked for viruses by AVG. https://www.avg.com

My $300 laptop has 1920 x 1080. Great for video etc but awful for running normal software on, what a crazy situation. The result is everything looks so tiny on the menus on 90% of the programs in use.

I have the same issue. But use another USB cable is sometimes better. If i push OK in the serialPort window, the port is recognized after a few attempts. But yes,it is not ideal.

The IP5303 chip turns on when the load is connected. Connect a 20-100 ohm resistor to terminal 8 and the GND, if switching on does not occur, replace IP5303.