开云体育

cheers larry,looks like it cant do any harm using it then,may save the vna front end incase of a cock up.

There is no advantage. The 101 points are across the frequency range displayed.

Spell checker smile of the day...... :-)

This is a 10W limiter
is similar to yours, so I would suspect you could use it on CH1 without issue as long as you re-calibrated with it attached.
...Larry

hi all,ive an old hp limitre from an old rectum paralyser,its a 5086-7282 0- 1.8ghz,is it worth putting this on the input port of my nanovna as a protection,is it a goog idea or bad?,73.

Thanks!
The download works great.
I'll be trying it out later today!

--
Cheers, Ed Humphries, KT4ED

Hi Luigi,
The RESET on-screen button clears only the current calibration constants in RAM and it needs to be used any time you attempt a calibration/save sequence.
It does NOT clear what is already stored/saved in flash(ROM). The console command CLEARCONFIG does that and loads defaults into flash memory at all 5 locations.?

So - with that said, if you want to perform an additional calibration for 1 to 30MHz, you would set your freq range then perform:?

CAL -> RESET -> CALIBRATION ->SOLT -> Save 1 through 4?

OR?

If you only want to use the 1 to 30MHz range most of the time, you can save to location 0 and it will load that calibration at power-on every time.

You can verify that when you cycle power, memory 0 returns what you've stored there.
I hope this clears up things.
...Larry

Luigi
Each time you perform a calibration the following procedure should be performed:

1. Reset current calibration state, <CAL- RESET>
2. Connect the OPEN standard to the CH0 port, <CAL - CALIBRATE OPEN> and execute.
3. Connect the SHORT standard to the CH0 port, <CAL - CALIBRATE SHORT > and execute.
4. Connect the LOAD standard to the CH0 port, <CAL - CALIBRATE LOAD> and execute.
5. Connect the LOAD standard to both the CH0 and CH1 ports, <CAL - CALIBRATE ISOLN> and execute. If there is only one load, the CH0 port can be left unconnected.
6. Connect the cables to the CH0 and CH1 ports, connect the cables with the through connectors, <CAL - CALIBRATE THRU> and execute.
7. Finish calibration and the error correction information will be computed, <CAL - CALIBRATE DONE>
8. Specify the memory cell number and save, <CAL - CALIBRATE SAVE - SAVE 0> or save to one of the other 4 memory locations if desired.

Notes:

1. Saving to <SAVE 0> will make the calibration the default configuration when the NanoVNA is turned on.
2. If you save to one of the other 4 memory locations you need to use the RECALL menu option to reload the configuration.
3. If you don't perform a save then the calibration is only temporary and will be lost after power off. The former SAVE 0 configuration will be re-stored at power on.
4. If you are only performing a temporary change for through lost measurements, you do a quick normalization by skipping steps 2 - 5 and skip step 8. The normalization will only apply for the current session.

Hope that helps.

- Herb

Hi Lajos
Yes I use arbitrary calibration setting. It provides the best calibration.
For the NanoVNA I use different versions on the 3 I have. Latest edy555, Latest Hugen-H versin AA with nice larger alphanumeric characters and the default Hugen supplied with my cased Hugen-H.
I am about to try the latest Q version
I know the method for finding Zo and K factor in ZPlots. I just did the other day short/open method with success
Good luck with getting calibration kit made.
Kind regards
Kurt


-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af pgc1682@...
Sendt: 10. december 2019 10:28
Til: [email protected]
Emne: Re: [nanovna-users] New version of NanoVNA-Saver: 0.2.1

Hi Kurt,

Thanks for the detailed example pdf. I will try it. I not understand some things on calibrations. Your calibrations better than my. I not have well enginered measured oslt cal set with proper data. I have oslt not only sma but no data. I use also wvna (not my). Its have calibration kit and data. But with bad condition. You use arbitrary calibration model on your wvna?

Wich firmware use on your nanovna? Currently i use qrp not newest firmware. I see more nanovna. Not same result. My nanovna better. I not know why. I think hugen device both, but not sure. Much higher noise and amplitude change on harmonic change. Version 3.2 (better) version 3.3 pcb. On 3.3 not qrp firmware running.

I see your final result on port extension. Good wideband result. It will be better. Rest loss exist. I not know why, oslt calibration residual or your cable slighy higher loss than database. I recommend try k parameter optimize by hand.

Or try measure k parameters on well calibrated device. With zplots can do. Simple short/open sweep required and zplots calculate parameter for cable. Better if you have not 50 ohm terminators, low/high resistor method.

Diy terminators possiby on sma zero leg + two 0805 resistors.

73,
Lajos

my Fire and get Error

How old is the Fire tablet?
Does it have Play Store or did you sideload?

Tried installing on my Fire and get Error parsing package.. Are there are pre-requisites to install this pls

Mike

Updated firmwares

Updated link in /g/nanovna-users/wiki

Hi Kurt,

Thanks for the detailed example pdf. I will try it. I not understand some things on calibrations. Your calibrations better than my. I not have well enginered measured oslt cal set with proper data. I have oslt not only sma but no data. I use also wvna (not my). Its have calibration kit and data. But with bad condition. You use arbitrary calibration model on your wvna?

Wich firmware use on your nanovna? Currently i use qrp not newest firmware. I see more nanovna. Not same result. My nanovna better. I not know why. I think hugen device both, but not sure. Much higher noise and amplitude change on harmonic change. Version 3.2 (better) version 3.3 pcb. On 3.3 not qrp firmware running.

I see your final result on port extension. Good wideband result. It will be better. Rest loss exist. I not know why, oslt calibration residual or your cable slighy higher loss than database. I recommend try k parameter optimize by hand.

Or try measure k parameters on well calibrated device. With zplots can do. Simple short/open sweep required and zplots calculate parameter for cable. Better if you have not 50 ohm terminators, low/high resistor method.

Diy terminators possiby on sma zero leg + two 0805 resistors.

73,
Lajos

Updated firmwares.
73, Gyula

Good Evening to all,

as a beginner and despite having been reading ALL of these posts, I’m still a little confused about the use of RESET during the initial or any subsequent calibration.

Let’s say I do the initial STIMULUS Start/Stop 50K-900M, then CAL -> RESET -> CALIBRATION… go through the OSLIT procedure… SAVE in C0 and double check SMITH for marker position on O, S, L… and all is good, yeah!

Now I decide to set up a range on HF (say 2M to 30M) so STIMULUS Start/Stop 2M-30M, next CAL and then……. RESET or NOT??? Continue as above and SAVE in C1 or C2, C3 or C4…

Two main articles on the subject, on this forum, suggest opposite instructions, hence my confusion…

And then we have the Console command “clearconfig 1234”, which apparently clears "ALL Config and Calibration data from the device”. Ok, that’s for another time.

Many thank in advance,

Luigi M

Hi,

Sim smith chart good program. But tricky, not easy understand user interface. User interface good, but not standard. Lots of beginnier video available. From author and w0qe.

For example, click on labels. Most labels not labels. They will be input field.

73,
Lajos

I have had mine for less than a week but I have to say this is the nerd-toy of the year. Will be looking at version 2 as the dust settles.

73

-Jim
NU0C


On Tue, 10 Dec 2019 00:52:06 +0000 (UTC)
"Bob Albert via Groups.Io" <bob91343@...> wrote:

At age 87 I too have vision problems but I don't care.? I have a magnifying glass that serves well.
My store of gear includes two VNAs besides the two nanoVNAs.? I fooled with the latter just to see what it could do.
I measured a batch of capacitors with the nano and, from 2 pF to about 0.5 microfarad, it came within about 1% of the readings I get with my fancy GR bridge.? I am impressed.? (There are some 'tricks' for getting good readings that I might share.)
I get comparable results with resistors and inductors.? I can measure Q and resonant frequency.? I checked a crystal and it was great, showing me the resonance within a very small tolerance.? For what it costs, it can't be matched.? I can measure characteristic impedance, coaxial loss, line length, and more.
So I have two of them just in case, so I won't have to do without if one acts up.
Bob K6DDX On Monday, December 9, 2019, 04:22:27 PM PST, Kurt Poulsen <kurt@...> wrote:

Hi Dave
Wonderfull to read such a message. I totally agree
My eyes are 4 year older than yours and the enjoy the lastest AA firmware from Hugen with larger fonts on screen. No problem to read the characters now.
I am also impressed with the low noise floor 40dB at 1500MHz seen on my two Hugen-H devices
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af David Eckhardt
Sendt: 10. december 2019 00:23
Til: NANO VNA <[email protected]>
Cc: David Eckhardt <davearea51a@...>
Emne: [nanovna-users] THE NANOVNA - A COMMENT

All too often we receive criticism for something we have accomplished or completed.? Well, that is not the intention of this email.? My life-long philosophy in such things is that a milligram (choose your unit of measure) of positive praise goes an astronomical units (again, choose your unit of
measure) farther than 1000 kg of negative dressing down (a.k.a., criticism).? So, with that stated:

Thank you ALL who brought the AFFORDABLE and highly FUNCTIONAL NANOVNA to the market!!!!!? It is a wonderful tool for the amateur and certainly, based on the emails I read, a motivating tool for learning many of the finer points of RF design and more than just basic SWR.? Guys and gals, well done ! ! ! ! !? What an instrument for all of US $50.? Again, well done........? And all this should include the "saver" SW.

I own an HP 8753C with the HP 85047 S-Parameter test set with a bunch of additional RF and low microwave test gear, mostly HP.? I know how to use these instruments.? But comparing the NANOVNA to the HP 'equivalent' which, in its day, cost 1000X the NANOVNA , you did a bang-up job.? Please continue the efforts and offerings.? It IS appreciated.? And, BTW, the noise floor using s11 with my unit is about 10 dB better that advertised.

Again, thank you for offering an affordable, motivational, capable, and educational tool to the average amateur (and a few EE's who can't even do Ohm's law....).

Dave - W?LEV

PS:? I have a pair of 'senior' eyes at 73 years of age (wisdom) and do wish the screen were larger.? Minor criticism as this would add cost.

To do the job the best way I would connect a short cable to the SMA and terminate it in whatever series I want, say BNC or N or UHF.? To avoid further stress it might be wise to put the cable end with BNC etc on a small bulkhead that is solidly mounted.? That should alleviate all stress on the vna and would last a long time.
As was said, do calibration after all is in place.
Bob

Kurt - you're not older... you're more 'mature' ;-)



On Mon, 9 Dec 2019 at 7:16 PM, Kurt Poulsen<kurt@...> wrote: Hi Dave
Wonderfull to read such a message. I totally agree
My eyes are 4 year older than yours and the enjoy the lastest AA firmware from Hugen with larger fonts on screen. No problem to read the characters now.
I am also impressed with the low noise floor 40dB at 1500MHz seen on my two Hugen-H devices
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af David Eckhardt
Sendt: 10. december 2019 00:23
Til: NANO VNA <[email protected]>
Cc: David Eckhardt <davearea51a@...>
Emne: [nanovna-users] THE NANOVNA - A COMMENT

All too often we receive criticism for something we have accomplished or completed.? Well, that is not the intention of this email.? My life-long philosophy in such things is that a milligram (choose your unit of measure) of positive praise goes an astronomical units (again, choose your unit of
measure) farther than 1000 kg of negative dressing down (a.k.a., criticism).? So, with that stated:

Thank you ALL who brought the AFFORDABLE and highly FUNCTIONAL NANOVNA to the market!!!!!? It is a wonderful tool for the amateur and certainly, based on the emails I read, a motivating tool for learning many of the finer points of RF design and more than just basic SWR.? Guys and gals, well done ! ! ! ! !? What an instrument for all of US $50.? Again, well done........? And all this should include the "saver" SW.

I own an HP 8753C with the HP 85047 S-Parameter test set with a bunch of additional RF and low microwave test gear, mostly HP.? I know how to use these instruments.? But comparing the NANOVNA to the HP 'equivalent' which, in its day, cost 1000X the NANOVNA , you did a bang-up job.? Please continue the efforts and offerings.? It IS appreciated.? And, BTW, the noise floor using s11 with my unit is about 10 dB better that advertised.

Again, thank you for offering an affordable, motivational, capable, and educational tool to the average amateur (and a few EE's who can't even do Ohm's law....).

Dave - W?LEV

PS:? I have a pair of 'senior' eyes at 73 years of age (wisdom) and do wish the screen were larger.? Minor criticism as this would add cost.

GIN&PEZ

This looks much better thank you; but please don’t feel rushed on my behalf. I acknowledge that this is a works in progress, and I am working through this in my leisure... a luxury of being retired, but not a legitimate excuse from doing my chores. :-)

--
73

Gary, N3GO

At age 87 I too have vision problems but I don't care.? I have a magnifying glass that serves well.
My store of gear includes two VNAs besides the two nanoVNAs.? I fooled with the latter just to see what it could do.
I measured a batch of capacitors with the nano and, from 2 pF to about 0.5 microfarad, it came within about 1% of the readings I get with my fancy GR bridge.? I am impressed.? (There are some 'tricks' for getting good readings that I might share.)
I get comparable results with resistors and inductors.? I can measure Q and resonant frequency.? I checked a crystal and it was great, showing me the resonance within a very small tolerance.? For what it costs, it can't be matched.? I can measure characteristic impedance, coaxial loss, line length, and more.
So I have two of them just in case, so I won't have to do without if one acts up.
Bob K6DDX On Monday, December 9, 2019, 04:22:27 PM PST, Kurt Poulsen <kurt@...> wrote:

Hi Dave
Wonderfull to read such a message. I totally agree
My eyes are 4 year older than yours and the enjoy the lastest AA firmware from Hugen with larger fonts on screen. No problem to read the characters now.
I am also impressed with the low noise floor 40dB at 1500MHz seen on my two Hugen-H devices
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af David Eckhardt
Sendt: 10. december 2019 00:23
Til: NANO VNA <[email protected]>
Cc: David Eckhardt <davearea51a@...>
Emne: [nanovna-users] THE NANOVNA - A COMMENT

All too often we receive criticism for something we have accomplished or completed.? Well, that is not the intention of this email.? My life-long philosophy in such things is that a milligram (choose your unit of measure) of positive praise goes an astronomical units (again, choose your unit of
measure) farther than 1000 kg of negative dressing down (a.k.a., criticism).? So, with that stated:

Thank you ALL who brought the AFFORDABLE and highly FUNCTIONAL NANOVNA to the market!!!!!? It is a wonderful tool for the amateur and certainly, based on the emails I read, a motivating tool for learning many of the finer points of RF design and more than just basic SWR.? Guys and gals, well done ! ! ! ! !? What an instrument for all of US $50.? Again, well done........? And all this should include the "saver" SW.

I own an HP 8753C with the HP 85047 S-Parameter test set with a bunch of additional RF and low microwave test gear, mostly HP.? I know how to use these instruments.? But comparing the NANOVNA to the HP 'equivalent' which, in its day, cost 1000X the NANOVNA , you did a bang-up job.? Please continue the efforts and offerings.? It IS appreciated.? And, BTW, the noise floor using s11 with my unit is about 10 dB better that advertised.

Again, thank you for offering an affordable, motivational, capable, and educational tool to the average amateur (and a few EE's who can't even do Ohm's law....).

Dave - W?LEV

PS:? I have a pair of 'senior' eyes at 73 years of age (wisdom) and do wish the screen were larger.? Minor criticism as this would add cost.