Does anyone know a way to cleaner the 5 calibration memories?
The DMR-CLEAR_MEMORY_DFU.dfu file does not seem to do this (only firmware cleaner?).
Thanks
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Locked
Re: Inflation of this forum
Could " [email protected]" be set to go to an instruction page of some sort about how the subgroups are handled, if this group changes to subgroups?
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Re: errors of "error" models
Hi Gary - I am getting close in my understanding of your project I hope you find time to summarize your journey of discovery and interpret interesting implications for less diligent folks (me).
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To the potential developers:? I would like to point out that spectrum analyzers that go up to 1 GHz are quite affordable - used obsolete HP etc.? And there are new $170 ones already available, such as the RF Explorer.? This is a very nice and powerful handheld unit in a nice enclosure that goes up to 960 MHz.? RF Explorer has other models that go up to 2 GHz.? There are no inexpensive commercially available Spectrum Analyzers that cover 10 GHz, despite the fact that all that is needed to turn one of these other units into a 10 GHz SA is a mixer.? Even obsolete used HP SA units that cover 10 GHz still cost $5000+ and new ones are $40000+.
Is there a need for a $50 1 GHz SA?? Yes.
Is there a tremendous need for an inexpensive SA that goes up to 10 or 22 GHz? ABSOLUTELY!??
An affordable microwave SA, combined with NanoVNA V2 (up to 3.5 GHz), will open up microwave work to legions of people who have always avoided it because they didn't have the necessary instruments.? That would be a very good thing!
Mike WY6K
"... somewhere in the distance, there's a tower and a light, broadcastin' the resistance, through the rain and through the night..."
toggle quoted message
Show quoted text
On Tuesday, October 8, 2019, 11:16:11 AM CDT, Paul Beauvilliers <paul.beauvilliers@...> wrote: To the extent that this encourages present or future developers out there: A spectrum analyzer, with a tracking generator, that covers "below HF" through "above UHF", with user-selectable RBW and VBW, for around 50 USD would be ... awesome! [FWIW, I'm "blown away" by the nanoVNA ... so my thanks to those developers.] Paul WB1EMK On Tue, Oct 8, 2019, 10:02 Pierre Martel <petem001@...> wrote: If I can say a little something about this Idea.
A tracking generator would not cost a lot more in ressources and would
be a nice addon in a NanoSa.
And the possibility to add an amplifier to the TG to bring the level
to 30 DBm (1watt) would also be cool.
And lastly with the Generator in the TG, if you can modulate the
signal with a tone at a deviation level you can set, we could do some
really nice stuff.
With that said, I have a nice pelican box that could house all of
those nice device with a large rechargeable bank of Lithium/ion
battery lots of cable and adaptors. A Raspberry Pi4, 2 hdmi touche
screen And we have a portable RF labs..
Le mar. 8 oct. 2019 ¨¤ 09:18, Larry Rothman <nlroth@...> a ¨¦crit :
On Tue, Oct? 8, 2019 at 08:51 AM, <erik@...> wrote:
Would it be wonderful if there would be, next to the nanoVNA, a nanoSA
or nano
Spectrum Analyzer?
Well I decided to test what the most simple SA could look like, just
good
enough to test the harmonics level of your signals till 400MHz and
some other,
not too complex, measurements. Thanks for playing with this idea, Erik.
There was a comment from a Japanese NanoVNA user on Twitter comparing
the use of the Nano to an oscilloscope that is in the same price range but
has poor specs.
They gave an example of JYE Tech's 200KHz bandwidth scope kit for $30 vs the Nano's capabilities - image attached.
At this time, there is not near enough memory to implement a scope function - maybe in the version 2 device?
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Re: nanoVNA frequencies used
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Re: errors of "error" models
Good evening GIN&PEZ;
I believe I have had a second epiphany, and I believe I am getting close in my understanding of your project.
I first respectfully suggest that I hold you accountable in part for the difficulty of following the segmented approach of your presentation. This is a subjective (not personal) but technical criticism for the following:
1) Insufficient information is provided in many of your posts to alert a reader to your concerns, questions, suggestions, or criticisms without first navigating to one or more of the embedded links.
2) Our statements are not always translated in precise coordination with our intentions, making it difficult for a reader to be motivated to follow the links as a pre-requisite to comprehending the post.
3) Understanding a post that necessitates toggling back and forth through various links interrupts the reader who is required to divert their attention toward the task of navigating previous posts, and documents.
4) Short logically organized contextually segmented posts are convenient and efficient when engaged 1 to 1. It is uninviting, confusing, or convoluted to potentially beneficial contributors who stumble upon the thread in passing.
I will now dispense with the subjective criticism and return to the task of interpreting and understanding your results.
I have consumed your final report 1 and final report 2; and I find them to be consistent with my understanding to this point. I have also gone back and reviewed our previous exchanges, and I believe I am very close to capturing the objectives of your project.
The above leaves me with the following comments and questions;
1) The graphical data in final report 2 appears excellent as I would anticipate. it is however simply a pair of graphs.
2) Neither final report 1, nor final report 2, nor both of them combined, is insufficient to be termed a final report. I suspect this to be another translational issue, as I have subjectively described at the beginning of this post.
3) The origin, conditions, and requirements of the tests and environment supporting the data is required as a condition of giving it meaning. I assume this is forthcoming, but there is no hint of a final report #3 or a final final report, including a summarized conclusion.
I am encouraged and cautiously optimistic at where I am with my understanding, and hopeful that your findings are at least as well articulated as your series of 5 publications on this topic.
I will be staying tuned.
--
73
Gary, N3GO
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Re: Inflation of this forum
I shifted to the Digest mode...and I go through them when I have a moment and interest to do so. They are archived at the groups.io website so I can always go there for reference. If you're choking, quit drinking....my suggestion.
73,
Frank
K4FMH
---
Frank M. Howell, PhD
Professor Emeritus, Mississippi State University
Ridgeland MS 39157
---
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This is a very good point...
Mike WY6K
"... somewhere in the distance, there's a tower and a light, broadcastin' the resistance, through the rain and through the night..."
toggle quoted message
Show quoted text
On Tuesday, October 8, 2019, 10:53:35 AM CDT, norbert.kohns@... <norbert.kohns@...> wrote:
Hi Rune,
if you would change the word "Span:" to "BW:" that's more comprehensive.
Please add a -6dB BW as well because SSB chrystal filters are usually characterized with their -6dB BW.
If you don't set a marker from where the search starts, and let the software find the -3dB points of the BP-filter instead, then the software can also calculate the correct center frequency of the BP-Filter. This is very helpfull while adjusting a homebrew filter, because you would get from sweep to sweep an update of the CF. If I understand the current method correctly, I will set the CF with the marker visually. Correct me if I am wrong.
For HP- and LP filters this method would work as well. If you search for lowest attenuation first and set this value as reference, next search for the -3dB point starting at reference.
What do you think about that?
Kind regards
Norbert, DG1KPN
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Actually yes.? We have successfully used the RTL-SDR and the Airspy.
Mike WY6K
"... somewhere in the distance, there's a tower and a light, broadcastin' the resistance, through the rain and through the night..."
toggle quoted message
Show quoted text
On Tuesday, October 8, 2019, 8:06:58 AM CDT, Oristo <ormpoa@...> wrote:
If calibrated for amplitude at spot frequencies using nanoVNA,
then could some SDR (e.g. SDRplay has Android API) be useful for spectrum analyses?
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Interesting.? Is there a schematic?
Mike WY6K
"... somewhere in the distance, there's a tower and a light, broadcastin' the resistance, through the rain and through the night..."
toggle quoted message
Show quoted text
On Tuesday, October 8, 2019, 7:52:03 AM CDT, erik@... <erik@...> wrote:
Would it be wonderful if there would be, next to the nanoVNA, a nanoSA or nano Spectrum Analyzer?
Well I decided to test what the most simple SA could look like, just good enough to test the harmonics level of your signals till 400MHz and some other, not too complex, measurements.
According to my estimate the BOM of the nanoSA on the photo would be around 12$
Main components are two SI4432 modules, one in RX mode at 443MHz using the RSSI as log detector, one as +20dBm LO for the mixer (443MHz - 886MHz), a 443mHz SAW filter as first IF filter, a Double balanced diode mixer and an arduino zero (3.3 volt) or compatible (arduino micro with 3.3v serial to USB module will also work), adding a LCD will still keep the cost below 25$ or 50$ retail.
The measurement performance is surprisingly useful.
Attached a scan of the harmonics and spurs of a SI5351 at 25MHz
And a scan of the AD9851 ast 25MHz, both connected through a 30dB attenuator
Specs:
Range 0-400MHz (0-200MHz with unmodified modules)
RBW selectable between 3kHz and 600kHz
With RWB=300kHz noise floor below -90dBm
Max signal around -5dBm
Did not yet do the IIP3 measurement but the used ADE-25MH is supposed to be +13dBm
Good enough for many measurements.
Things to further improve:
- 400MHz low pass filter at input
- remove output filter of TX module to get full 400MHz bandwidth
- Put everything in a box.
I hope someone gets inspired and puts everything on a PCB with a LCD as a small standalone SA (nanoSA)
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Re: nanoVNA frequencies used
Erik, Thank you for the table. It confirms what I wrote in the post at: /g/nanovna-users/topic/power_output_from_ch0_of_the/34444428?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,34444428 So the third harmonic IS used on CH0 for 300-900 MHz, in both CW mode and in sweep mode. I was not aware of that; however, it does make sense. -- Bryan, WA5VAH
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Locked
Re: Inflation of this forum
just sent an email to [email protected] as a test and this is what I received back: [DVSwitch] test Pierre Martel via Groups.Io <xxxxx@...> ? dvswitch Just making a test
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I just received a heads-up email from Adafruit (in the US).
They have a new uP module coming out shortly that might be good to use as the base for your own VNA/SA/O-scope/etc project:
ST takes flight in this upcoming Feather board. The new STM32F405 Feather (video) that we designed runs CircuitPython at a blistering 168MHz ¨C our fastest CircuitPython board ever! We put a STEMMA QT / Qwiic port on the end, so you can really easily plug and play I2C sensors.
This Feather has lots of goodies:
STM32F405 Cortex M4 with 1MB Flash, 168MHz speed
3.3V logic, but almost all pins are 5V compliant!
USB C power and data - our first USB C Feather!
LiPo connector and charger
SD socket on the bottom, connected to SDIO port
2 MB SPI Flash chip
Built in NeoPixel indicator
I2C, UART, GPIO, ADCs, DACs
Qwiic/STEMMA-QT connector for fast I2C connectivity
Unfortunately, no pricing yet.
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Locked
Re: Inflation of this forum
I'm thinking of changing my subscription to the daily or 12 message version. Right now I'm somewhat overwhelmed by the continuous arrival of individual messages. I am ambivalent about subgroups as long as the headers are clear about the topic or thread.
Jim
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Locked
Re: Inflation of this forum
Dr. David Kirkby from Kirkby Microwave Ltd
On Tue, 8 Oct 2019 at 18:13, Rune Broberg <mihtjel@...> wrote: Your link seems to confirm that the group would no longer be available as
[email protected] ? At least, [email protected] isn't shown as a
valid email address for the group.
--
Rune / 5Q5R If the creation of subgroups were announced well in advance, adding the subgroups would probably be a case of of ¡°short term pain for long term ²µ²¹³¾±ð¡±. The admin can save all the email addresses of members, then send each member an invite to the new subgroups. Since otherwise I can see this group becoming unattractive to people. Dave -- Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@... Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
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To clarify the frequencies used by nanoVNA for the various measurement ranges I made a small table.
So if you are measuring in band 1 (300-900MHz) the CH0 output is actually a square wave of a lower frequency (1/3) and the 3rd harmonic is used by mixing it with the 5th harmonic of the mixer LO input
As of band 1 and higher the output power of CH0 is increased with 12dB to compensate for the lower energy in the 3rd harmonic.
Be aware as the strong fundamental may overload some DUTs such as amplifiers or mixers
Maybe something for the wiki?
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Locked
Re: Inflation of this forum
Your link seems to confirm that the group would no longer be available as [email protected] ? At least, [email protected] isn't shown as a valid email address for the group. -- Rune / 5Q5R
On Tue, 8 Oct 2019 at 19:06, Pierre Martel <petem001@...> wrote:
Le mar. 8 oct. 2019 ¨¤ 13:05, Pierre Martel <petem001@...> a ¨¦crit :
It would not destroy the primary group. we use it in the dvswitch group
Le mar. 8 oct. 2019 ¨¤ 12:25, Dr. David Kirkby from Kirkby Microwave
Ltd <drkirkby@...> a ¨¦crit :
On Tue, 8 Oct 2019 at 15:48, Jim AC0E <ham@...> wrote:
Dr. Kirkby,
Excellent suggestion. Especially, for myself, the beginners section.
Thank you.
Regards,
James Douglass
Garden City, Kansas
USA
Yes, I think beginners is quite an important one.
*Subgroups might be more of a PITA than I thought. I looked at one
list I
own, and read this. *
Create A Subgroup
*Subgroups are a great way to segment your members. You can easily add
members from your parent group to each subgroup and you can see on one
page
which subgroups each member is a part of. Subgroups have the full
feature
set of parent groups; subgroup messages can be fully public, viewable
by
members of the parent group, or private to members of the subgroup.*
*When you create your first subgroup, a subdomain will be created
automatically for you. Your parent group is called
[email protected]
<[email protected]>. Let's say
you're
creating a subgroup called sg. After you create the subgroup, your
parent
group will now be
[email protected]
<[email protected]> and your
subgroup will be called
[email protected]
<[email protected]>. You can
change
main to any other name you wish.*
I interpret that is meaning creating a subgroup "Beginners" of
[email protected], would destroy [email protected], and
instead create [email protected]
and [email protected]
I don't know what would happen if someone sent an email to
[email protected].
I was tempted to try this on a group I own, but I'm reluctant to mess
up a
group that works well.
--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD,
Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Locked
Re: Inflation of this forum
toggle quoted message
Show quoted text
Le mar. 8 oct. 2019 ¨¤ 13:05, Pierre Martel <petem001@...> a ¨¦crit :
It would not destroy the primary group. we use it in the dvswitch group
Le mar. 8 oct. 2019 ¨¤ 12:25, Dr. David Kirkby from Kirkby Microwave
Ltd <drkirkby@...> a ¨¦crit :
On Tue, 8 Oct 2019 at 15:48, Jim AC0E <ham@...> wrote:
Dr. Kirkby,
Excellent suggestion. Especially, for myself, the beginners section.
Thank you.
Regards,
James Douglass
Garden City, Kansas
USA
Yes, I think beginners is quite an important one.
*Subgroups might be more of a PITA than I thought. I looked at one list I
own, and read this. *
Create A Subgroup
*Subgroups are a great way to segment your members. You can easily add
members from your parent group to each subgroup and you can see on one page
which subgroups each member is a part of. Subgroups have the full feature
set of parent groups; subgroup messages can be fully public, viewable by
members of the parent group, or private to members of the subgroup.*
*When you create your first subgroup, a subdomain will be created
automatically for you. Your parent group is called
[email protected]
<[email protected]>. Let's say you're
creating a subgroup called sg. After you create the subgroup, your parent
group will now be [email protected]
<[email protected]> and your
subgroup will be called
[email protected]
<[email protected]>. You can change
main to any other name you wish.*
I interpret that is meaning creating a subgroup "Beginners" of
[email protected], would destroy [email protected], and
instead create [email protected]
and [email protected]
I don't know what would happen if someone sent an email to
[email protected].
I was tempted to try this on a group I own, but I'm reluctant to mess up a
group that works well.
--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD,
Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Locked
Re: Inflation of this forum
It would not destroy the primary group. we use it in the dvswitch group Le mar. 8 oct. 2019 ¨¤ 12:25, Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...> a ¨¦crit :
On Tue, 8 Oct 2019 at 15:48, Jim AC0E <ham@...> wrote:
Dr. Kirkby,
Excellent suggestion. Especially, for myself, the beginners section.
Thank you.
Regards,
James Douglass
Garden City, Kansas
USA
Yes, I think beginners is quite an important one.
*Subgroups might be more of a PITA than I thought. I looked at one list I
own, and read this. *
Create A Subgroup
*Subgroups are a great way to segment your members. You can easily add
members from your parent group to each subgroup and you can see on one page
which subgroups each member is a part of. Subgroups have the full feature
set of parent groups; subgroup messages can be fully public, viewable by
members of the parent group, or private to members of the subgroup.*
*When you create your first subgroup, a subdomain will be created
automatically for you. Your parent group is called
[email protected]
<[email protected]>. Let's say you're
creating a subgroup called sg. After you create the subgroup, your parent
group will now be [email protected]
<[email protected]> and your
subgroup will be called
[email protected]
<[email protected]>. You can change
main to any other name you wish.*
I interpret that is meaning creating a subgroup "Beginners" of
[email protected], would destroy [email protected], and
instead create [email protected]
and [email protected]
I don't know what would happen if someone sent an email to
[email protected].
I was tempted to try this on a group I own, but I'm reluctant to mess up a
group that works well.
--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD,
Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Hello,
This email message is a notification to let you know that the following files have been uploaded to the Files area of the [email protected]
group.
Uploaded By:
Larry Rothman <nlroth@...>
Description:
A Japanese NanoVNA owner on Twitter decided to modify their device to provide additional RF testing functionality. This document briefly shows what they did. Using the #nanovna hashtag on twitter will bring up several others that are hacking their devices to improve performance.
Cheers,
The Groups.io Team
|
Oristo
WY6K Mike Watts
K4FMH
