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Here is a picture of the most simple setup The tinySA at the bottom right is doing the sweeping. Its tracking output from the high connector is connected to the LO port of a mixer. A generator at

Yes, that was the intention. You may use this setup: The external tracking mixer has three ports, LO, RF and IF. I'm assuming the IF port is connected to the diodes in the mixer so it can go down to

And then it occurred to me I can do the same trigger trick to pause a sweep once a signal above trigger level has been seen so here is the frequency scan of the 433MHz RF remote control. Not so clean

A rather basic trigger mechanism is implemented, If a signal is above a settable level a capture is done. Here a 433MHz RF remote control transmission I need to add some info on the horizontal time

Erik, Can a tracking generator be created using an external mixer and LPF driven by the tinySA LO?? I have a WJ 0.2-500MHz mixer and 300MHz LPF?on hand. I'm not clear what I.F.? is normally used to

Erik, Thanks for the replies.? When I have more than one serial device connected, the VID/PID helps my scripts automatically identify the device I want to communicate with.? The "tinySA" in the

Herb The VID/PID are identical to the nanoVNA (for now) The virtual serial port (when using it with windows) becomes? a COM port so no need for VID/PID there The info command output starts with

========================================================== Erik, While you are checking the documentation for the dc rating of the tinySA's? input ports, could you also see what the? VID/PID's are

Both ports are AC with multilayer SMD capacitors. I guess up to 25 Volt should not be a problem. Let me check when I'm back to where the documentation is.

Erik, You've already noted the input ports are limited to +10dBm max.? What is the DC limit of the input ports?? I assume the limit is de-rated to half the dc rating of the input port coupling

Sala, I have an SDRPlay RSP2 that I have used as a spectrum analyzer with the RSP-Spectrum-Analyzer software.? ?I would say that it is good for checks below 40 MHz, so good for tight in spurs

The cheap msi.sdr rsp1 clone is not good.

These are definitely interesting and the price is not overly high. Are SDRplay models good as general spectrum analyzers, Are there a lot of ghost lines and so on.

Tiny Sa and a SDR are good pair. I think checking modulation close to carrier and checking spurs and harmonics are two different things. It is not IMO necessary to do both at same sweep.

That is the same? as what I see with my MSI.SDR SPR1 clone. But is soon as you apply an input signal the spurs start to explode

I have been experimenting with an MSi.SDR RSP1 clone from China for a short while and must admit I have only used it for relatively narrow span measurements. IMHO the RSP SA software has many nice

I tried a cheap RSP1 Chinese clone with the RSP SA PC software. It works very well for small RBW but when doing wider sweeps I saw many spurs and I was never sure if they where really there or where

Greetings, IMHO the major advantages offered by the tinyVNA concept are handheld portability and cost. The instrument concept is ideal for many portable field measurement needs. Professional field

That will take a bit of time to configure my linux system for that. I started with installed version to get a handle on "normal" operation. Doesn't have to work perfect that way only to get a

Yes. Please make sure you install the new FW as indicated on the wiki You can choose to use ch.dfu or ch.bin or ch.hex