Re: Supply voltage requirement?
added to Wiki Main Menu: /g/nanovna-users/wiki
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Oristo
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#4061
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Re: Another ebay deal?
I looked for BNC with 0.1" spacing, but so far found only this: http://daqstuff.com/500057_brd_bnc_conn_kit.htm
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Oristo
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#4060
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Re: Supply voltage requirement?
Need to place the file with the electrical circuit separately. Some do not suspect that it is in the instruction manual. Many questions will disappear.
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DMR <bryonikater@...>
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#4059
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Edited
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Re: errors of "error" models
31 : On the Uncertainties of the "Standards" - Part II - 23 : On the Uncertainties of the "Standards" - Part I - 30 September 2019 /g/nanovna-users/message/3517 @ Jeff Anderson
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gin&pez@arg
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#4058
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Re: Cal-Kit Standards' Definitions
Thanks for the response! So, if I * properly calibrate at the VNA port * plug in a candidate cable terminated with calibration load * observe no appreciable reflection .. then that cable unterminated
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Oristo
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#4057
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Re: Cal-Kit Standards' Definitions
Hello Oristo Yes just by using the Electrical delay, but there is always a but, the delay in a transmission line is frequency dependent and if the impedance is not precise 50 ohm we might have an
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Kurt Poulsen
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#4056
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Markers disappear at different span
Hi Rune, I just tested a SFZ450F ceramic filter. First I had set a span of 50kHz and I set 3 markers. Than I changed to 50kHz span and all the markers were gone. If you try to set a new marker in the
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Norbert Kohns
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#4055
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Re: Return Loss
What "a can of worms" this subject opens up.?I noticed the Hewlett Packard rarely if ever referred to return loss as a hardware specification; it was always specified in terms of SWR. Personally I
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Stuart Landau
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#4054
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Re: Another ebay deal?
Another option, If you want to plot smith charts from Touchstone .s1p .s2p files, Simsmith also does this. It is Free. <http://ae6ty.com/Smith_Charts.html> I am eagerly hoping someone integrates this
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David Huff
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#4053
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Re: Supply voltage requirement?
The internal LiOn battery (if connected) is like 3.7 to 4.2V. It is normally charged from externally-supplied USB 5V. This suggests to me that the innards run on something less than 3.7V (most likely
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mike miniver
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#4052
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Re: NanoVNA V2
You must have a very cheap source of the ADF4350 since MAX2871 is just around 8 USD. Which RF switch do you use to switch between the si5351 and the ADF4350? Most switches are not specified below a
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Reinier Gerritsen
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#4051
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Re: Preamp noise figure (NF) measurement?
Could always try! But it's not first on the wishlist. I'll keep this thread linked on the backlog :-) -- Rune / 5Q5R
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Rune Broberg
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#4050
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Re: Preamp noise figure (NF) measurement?
so - this is something that Rune might be able to add to his 'Saver application?
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Larry Rothman
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#4049
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Re: Return Loss
Oops, This was not meant to be sent to the list, but privately to someone who emailed me on the subject. Anyway, I stand by what I said 1) Return loss should be positive for passive components. 2) I
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#4048
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Re: Return Loss
Yes, I am G8WRB. The problem is return loss is *often* used as a negative number in professional academic publications. This one from an IEEE, has a particularly amusing title; Low-Return-Loss Printed
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#4047
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Re: Preamp noise figure (NF) measurement?
From my limited understanding of the Y factor noise measurement you only need to measure power ratio in a not so critical frequency band. Correct? If yes. The CH1 input can function as a power meter
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Erik Kaashoek
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#4046
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Re: Return Loss
return loss is (almost always) a positive number. If one insists on negative numbers, just call it s11 (or s22). In essence the same property, but negative. Op 4-10-2019 om 17:20 schreef Ron Spencer
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Reinier Gerritsen
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#4045
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Re: Supply voltage requirement?
I think folks here are reporting 2-4 hours depending on the size and age of battery.I hear units come with 300mAH up to 450mAH batteries.? YMMV
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Larry Rothman
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#4044
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Re: info update
No, "Demo" may be an historic artifact from the original author. STM makes the software freely available to encourage use of its STM32 technology. Yes, but you need that only if some other firmware
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Oristo
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#4043
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Re: Preamp noise figure (NF) measurement?
HOWEVER: The frequency steps on the NanoVNA are quite large depending on the settings. Now, with that said, maybe Rune can create an SA NanoVNA-Saver offshoot application that would perform
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Larry Rothman
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#4042
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