Re: NanoVNASaver -- save points?
Hi Rune,
Again, I would like it very much when "uncalibrated" or? the description of the active calibration-file is shown in the MAIN window, to avoid confusion while working.
Jos
Op 25-11-2019 om 09:26 schreef Rune Broberg:
toggle quoted message
Show quoted text
Hello DE8MSH,
Thank you for your comments and your suggestions!
Currently, NanoVNA-Saver has no interaction with the calibration on the
NanoVNA itself. The application assumes that you have a calibration on the
NanoVNA covering at least the span of frequencies read - in order to put
the readings in the expected span of values, or at least close to that span.
The calibration you can do in NanoVNA-Saver is a further calibration to
refine the accuracy and to allow more than 101 data points, and it is not
saved on the NanoVNA, but it is possible to save it as files (I use the
extension ".cal").
The NanoVNA firmware does not offer a way to write calibration data to it.
It does allow triggering the short/open/load/isolation/through functions
for calibration on the device, but this is not currently utilized by
NanoVNA-Saver.
I am looking into running the NanoVNA in uncalibrated mode, and purely
handling the calibration in NanoVNA-Saver, in order to save the step of
calibrating the NanoVNA itself for those users who purely use it when
connected to a computer.
NanoVNA-Saver does not currently load the previous calibration. This is a
deliberate design choice, as the calibration is heavily dependent on what
cables, connectors etc. are used with the NanoVNA, and I would rather not
load any calibration than load a wrong calibration and display completely
erroneous data. So currently, NanoVNA-Saver by default shows the same data
as is displayed on the NanoVNA itself.
I hope these comments explain some of the reasons why things currently are
as they are. :-)
|
Re: NanoVNA-H version 0.4.0-3 compiled on November 25, 2019
Hugen's updates from today's NanoVNA-H firmware release:
1.The absolute value of the linear format is displayed;??
2.Si5351 default 8mA output;??
3.The AA version shows 4 traces.??
Note large font on 4 traces now.
toggle quoted message
Show quoted text
On Monday, November 25, 2019, 4:52:48 a.m. GMT-5, Dean Smith <bardezbiker@...> wrote:
and hugen79 a couple of hours ago!
here..
|
Re: NanoVNA software developers wanted
#hacking
...PCB version of NanoVNA-H to V3.4...easy to DIY Bluetooth connection The recently announced (for ~ US$20) Arduino NANO 33 BLE claims USB host support: Based on Nordic nRF52480 (which cannot natively implement USB host), this may be a minimal hardware prototype for Bluetooth LE via USB with existing nanoVNAs, except that dedicating the Arduino NANO 33 BLE USB port to host may be too disruptive, so perhaps prototyping by a USB host shield may still be more expedient: Cheap USB Host Shields are typically DuinoFun clones, e.g.
|
Re: Simple way to produce calibration standards
#calibration
Your standards could be significantly improved as follows:
Short: Don't use wires, too much added inductance. instead use braid or a thin piece of sheet copper (with hole) pushed down flush against connector body and soldered all around.
Open: Long center pin makes for added uncertainty of reference plane location. Instead, cut off the center pin flush with the connector body.
Load: Resistors floating off the connector body adds inductance. Instead, trim center pin to short stub (~1 mm), and solder down the resistors laying right against the connector body, preferably turned over with the coated side facing the connector body.
Dana (K8YUM)
|
Re: NanoVNASaver -- save points?
Hi Rune,
when you raise a nice fat pig from a small pig, there will always be someone who does not like why they are not smart enough. :? :?
It was just a joke, sorry.
73, Gyula
|
same seller i ordered, fake tracking number which never showed any progress. But before the last day of delivery (Novemebr 19) I was not able to issue a? dispute and claim a refund . I did this on November 20. Seller responded, but I insist on a refund. So lets see what happens.
Henning Weddig
Am 25.11.2019 um 06:27 schrieb biastee via Groups.Io:
toggle quoted message
Show quoted text
I also ordered from dowjors3236, but, have been unsuccessful in getting a refund.
When I first complained to eBay customer service, they directed me to PayPal because the item's "buyer's protection" is supposed to be handled by the latter. Unfortunately, PayPal's website didn't have a record of the transaction. When I contacted eBay again, they gave me a transaction id for reporting to PayPal's customer service. However, PayPal claimed the transaction id is invalid. After many rounds of to & fro with PayPal customer service (talking to different persons each time), finally, they finally agreed to manually open a dispute for me. That was 2 weeks ago, but I haven't heard from them since.
Another issue is that eBay's deadline for filing a dispute (45 days from purchase) ends before the delivery window.
Chin-Leong, 9W2LC
|
NanoVNA-H version 0.4.0-3 compiled on November 25, 2019
and hugen79 a couple of hours ago!
here..
|
edy_555 release...
0.5.1-20191123 couple of days ago
Here..
|
Re: NanoVNASaver -- save points?
Hey dr op 5QR5.
Okay. That explains a lot :).
But: I think a "X" for load last .cal file would be okay. A textbox can show the filename of last .cal file.
What do you think?
|
Re: NanoVNASaver -- save points?
Hello DE8MSH,
Thank you for your comments and your suggestions!
Currently, NanoVNA-Saver has no interaction with the calibration on the
NanoVNA itself. The application assumes that you have a calibration on the
NanoVNA covering at least the span of frequencies read - in order to put
the readings in the expected span of values, or at least close to that span.
The calibration you can do in NanoVNA-Saver is a further calibration to
refine the accuracy and to allow more than 101 data points, and it is not
saved on the NanoVNA, but it is possible to save it as files (I use the
extension ".cal").
The NanoVNA firmware does not offer a way to write calibration data to it.
It does allow triggering the short/open/load/isolation/through functions
for calibration on the device, but this is not currently utilized by
NanoVNA-Saver.
I am looking into running the NanoVNA in uncalibrated mode, and purely
handling the calibration in NanoVNA-Saver, in order to save the step of
calibrating the NanoVNA itself for those users who purely use it when
connected to a computer.
NanoVNA-Saver does not currently load the previous calibration. This is a
deliberate design choice, as the calibration is heavily dependent on what
cables, connectors etc. are used with the NanoVNA, and I would rather not
load any calibration than load a wrong calibration and display completely
erroneous data. So currently, NanoVNA-Saver by default shows the same data
as is displayed on the NanoVNA itself.
I hope these comments explain some of the reasons why things currently are
as they are. :-)
--
Rune / 5Q5R
toggle quoted message
Show quoted text
On Mon, 25 Nov 2019 at 06:39, <de8msh@...> wrote: Hey dr ops.
When I calibrate NanoVNA with NanoVNASaver and save the data, will it be
loaded automaticaly if I start NanoVNASaver again?
And: Is there a transfer between NanoVNASaver and NanoVNA save slot 0?
If not: Can we have a "save to NanoVNA slot 0" button?
If not: Why not?
:)
73 de DE8MSH
|
Re: Simple way to produce calibration standards
#calibration
Only non-inductive resistors are needed around the GHz, which must be soldered to the connector and cut off excess feet. The calibration on the images is appropriate for the shortwave. Calibrations made in China are tools that can be used for example ebay sellers are likely to have fallen out of quality control, so sell for that and that.
The measuring point should always be the same as the calibration point.
Gyula, HA3HZ
|
Re: NanoVNASaver -- save points?
The nanoVNA-Saver does not automatically load previously saved data, but you can create a lot of calibration data yourself and download it as a calibration data before use.
You can comment on the saved data and read it after loading.
Hardware can do limited things due to its limited memory.
This is expanded by the nanoVNA-Saver.
Successful use.
Gyula, HA3HZ
|
|
|
Re: NanoVNASaver -- save points?
Hello, I thougt abiut that too for a while.
IT would be ideal if SaverSw would be extended such that it could recall all four Cal Data in the nanaovna decice.
I am using different fixtures, all calibrated individually and stored in nanovna decice and again also in SaverSw.
Once I change fixture I need to recall the corresponding Calibration Data in SaverSw AND in the naoanvna device.
This is doable, but it would be great if one could combine that all via SaverSw.
Don't know if there is a USB command available in nanaovna device for recalling a individual Cal data-set ?
|
NanoVNASaver -- save points?
Hey dr ops.
When I calibrate NanoVNA with NanoVNASaver and save the data, will it be loaded automaticaly if I start NanoVNASaver again?
And: Is there a transfer between NanoVNASaver and NanoVNA save slot 0?
If not: Can we have a "save to NanoVNA slot 0" button?
If not: Why not?
:)
73 de DE8MSH
|
I also ordered from dowjors3236, but, have been unsuccessful in getting a refund.
When I first complained to eBay customer service, they directed me to PayPal because the item's "buyer's protection" is supposed to be handled by the latter. Unfortunately, PayPal's website didn't have a record of the transaction. When I contacted eBay again, they gave me a transaction id for reporting to PayPal's customer service. However, PayPal claimed the transaction id is invalid. After many rounds of to & fro with PayPal customer service (talking to different persons each time), finally, they finally agreed to manually open a dispute for me. That was 2 weeks ago, but I haven't heard from them since.
Another issue is that eBay's deadline for filing a dispute (45 days from purchase) ends before the delivery window.
Chin-Leong, 9W2LC
|
i installed the Play store on my fairly newish Kindle Fire8
which then let my install the NanoVNA .apk right from the Play store
works a treat
did some repeater work the other day with the setup
really nice to be able to save the graphs as well as the touchstone files
and upload them to google drive
|
|
|
Greetings. I use 'screen protectors' on both my 2.8" VNA and my new 'F' model. NO issues.
I started using these a long time ago on my 'smartphone' and have used them on my Icom 7300, 7610, 9700 and Kenwood TS-890 radios, NEVER any issues.
I usually buy the 'tablet' size and cut them to fit. After a couple of tries, it becomes very easy. YES, there is a 'learning curve'.....
ron
N4UE
|
Re: Simple way to produce calibration standards
#calibration
The BNC calibration standards are not nearly as good as the SMA ones. There is more stray capacitance and series inductance in BNC because of the bigger size. I made BNC calibration standards and they work ok, but the error is definitely much greater above 400 to 500 MHz. On Sun, Nov 24, 2019 at 1:55 PM Bob Albert via Groups.Io <bob91343= [email protected]> wrote: Why not use ordinary BNC hardware with an adapter? Maybe not good all
the way to 900 MHz but fine for casual use.
Bob
On Sunday, November 24, 2019, 10:35:34 AM PST, Daniel Marks <
profdc9@...> wrote:
I was not very satisfied with the quality of the calibration standards I
ordered off of ebay, so I made my own out of PCB edge mount male SMA
connectors as shown here:
The picture is attached. It is simple. One of them is unmodified for the
open, you solder a wire between the center conductor and two PCB edge
mounts for the short, and use two 0805 or 1206 100 ohm resistors, soldering
the resistors from the center pin to the edge mounts.
A pack of 5 of the connectors cost me under $2 on ebaay.
|
Oristo
Gyula Molnar