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From the info from NXP, neither the SA602AD or the SA612AD indicate a max. input signal into either port. Max Vcc is 9 Volts though They list TOIP, but not a maximum input signal level, or frequency.

Don’t just highlight this one message. It also had a precedent. see from here: /g/nanovna-users/topic/76003965#16196 -- *** If you are not part of the solution, then you are the

ESD (Electrostatic Discharge) is not the issue. 90-watts into a sub-milliwatt port is the real problem! Likely some silicon was disordered from its engineered ordered state. Dave - W?LEV -- *Dave -

I enjoyed your RARS presentation last month Dan. Thanks for taking the time to put it together and present it. 73, -Rob N4MN

I have apparently tested and exceeded the limit by briefly sending about 90w rf at 50 MHz into the CH0 port of my nanovna-H. --by accident-- I wanted to upgrade to the larger display H4 model anyways.

Arguments and snake oil regarding antennas and transmission lines should not prevail when the hard, cold, correct, engineering practices and hard physics of the situations are considered. These

So many firmwares, so many hardware variations. Can't use this one for my nanoVNA but thanks for the heads-up. -- Brian

I could not get Alibaba order form to understand how a Swedish mobile phone number looks like... so I ordered via AliExpress and payed with PayPal without any problems. Now just wait and see.... /Lars

Hi, I have build my version of the NanoVNA V2, in short it is in a hammond aluminium case with 4" Display and 4000 mAh battery. Currently selling some on tindie:

Point 1) is wrong (if resistance is greater than 50 ohms), Point 2) is correct. Use your nanovna to measure the phase of S11 for a resistor that has a value between perhaps 60 and 100 ohms. Keep the

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ The device sounds fantastic. For me, no screen would be ok as long as there was really good, cross platform, open source software to run on

As Miro has pointed out, tuning an antenna for resonance by looking for a pure resistance in the nanovna display must be done when measuring at the antenna feedpoint. This can be done by attaching

1) Yes, measure the frequency where the phase shifts from +180 to -180 degrees. 2) Using the definition of resonance: Measure the frequency where the complex portion of the impedance goes to zero. In

It's a bit more complicated than that. When the resistance at resonance is less than the 50 ohm impedance of the VNA, the reflection is 180 degrees out of phase with the incident signal. This would be

/g/nanovna-users/message/16266 Vince N2JRS

All valid comments, but I'd like to add a bit more :) 1) Antena resonance vs low SWR Those two are not always at the same antenna length/frequency. Resonant antena exhibits only resistance (the real

Which is why it's a good thing that Roger posted on the list <grin>.. redundant paths, always a good thing in communications.. jim

Why the firmware now is removed for the public? I found it very good and would like to recommend it to other users. But if they can't download it, it is of no use.

Some of us don't do facebook... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be

You can measure resonance with the nano by observing the phase.? When the phase switches from 180 degrees to -180 degrees you have resonance.? But minimum SWR is usually a good enough indicator if