开云体育

Like someone did said, Group.io can do sub-groups.

A nice layout of sub group would be something like:

firmware
hardware
software
where to buy
new user
advance discussion
calibration

the owner can even set pinned post on the main web site



Le mar. 8 oct. 2019 à 11:49, Dr. David Kirkby from Kirkby Microwave
Ltd <drkirkby@...> a écrit :

On Tue, 8 Oct 2019 at 12:43, Mike_nano <biounit.mike@...> wrote:

I agree. This is a mess and hard to follow. It should have been a forum
from the beginning. Suggest that since this project and others like it will
continue into the future, that a forum should be started and all messages
(if possible) be moved there. Do this ASAP.

This is my opinion.

What’s the difference between a forum and a group? I assume that they are
basically different names for the same thing, but perhaps I am wrong.

--

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

I just released 0.1.1:


[]
This version should work with NanoVNA-F, though I have had no way to test
it - I look forward to hearing if it does.
[]
Enjoy,
Rune / 5Q5R
===================================

Rune,

A basic test with the NanoVNA-F works as expected - just testing a filter response (as on my earlier Tweet).

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

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

groups.io groups are glorified mailing lists. They're very different from
"web forums", which is what I think people are requesting. Look at the
eevblog forums for a relevant example.

I don't have a problem keeping up with this list, but I do think the
discussions on the organisation of it, as well as complaints about the
amount of traffic, should be moved to a sub-group. ;-)

--
Rune / 5Q5R

On Tue, 8 Oct 2019 at 17:49, Dr. David Kirkby from Kirkby Microwave Ltd <
drkirkby@...> wrote:

On Tue, 8 Oct 2019 at 12:43, Mike_nano <biounit.mike@...> wrote:

I agree. This is a mess and hard to follow. It should have been a forum
from the beginning. Suggest that since this project and others like it

will

continue into the future, that a forum should be started and all messages
(if possible) be moved there. Do this ASAP.

This is my opinion.

What’s the difference between a forum and a group? I assume that they are
basically different names for the same thing, but perhaps I am wrong.

--

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

On Tue, 8 Oct 2019 at 12:43, Mike_nano <biounit.mike@...> wrote:

I agree. This is a mess and hard to follow. It should have been a forum
from the beginning. Suggest that since this project and others like it will
continue into the future, that a forum should be started and all messages
(if possible) be moved there. Do this ASAP.

This is my opinion.

What’s the difference between a forum and a group? I assume that they are
basically different names for the same thing, but perhaps I am wrong.

--

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

What confused some people is the fact that Group.io is both a mailing
list and a forum as Yahoo group are.

You can use group.io as a mailing list and never go to the web site
but to set your first inscription to the group.

Or you can only use the web interface and never receive an email, or
set to receive announcement to post you replayed or follow.

People need to use the tools in place as they prefer and not try to
impose a type of communication to the other.

MOn Tue, 8 Oct 2019 at 16:15, Richard G4TGJ <rpt@...> wrote:

On Tue, Oct 8, 2019 at 12:43 PM, Mike_nano wrote:

a forum should be started

Who will host it?

--
73
Richard
G4TGJ

Whether one calls it a group or a forum, I currently see no reason to move
from groups.io. It supports subgroups. I don’t have any experience of
these, but since I own two groups on groups.io

/g/HP-Agilent-Keysight-equipment
(4325 members)

and

/g/Test-Equipment-For-Sale-Wanted-or-Exchange
(895 members)

I could experiment, if the owners of this group wanted. But if they plan to
use hashtags, do nothing, create other groups etc, I will not waste my time.

It is interesting that the HP/Agilent/Keysight group has more than twice as
many members of this group, but only about 10% of the traffic!

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

I am confused by your suggestion.

The nanovna-users group IS a forum.

DaveD

--
This email has been checked for viruses by Avast antivirus software.

On Tue, 8 Oct 2019 at 11:55, <qrp.ddc@...> wrote:

Did you mean that user will be able to enter offset delay for open, short
and load and specify C0 for the open?

Yes.

I can try to add it at least for C0.


That would be a start. It would offer two improvements

1)*It would allow support of APC7 kits, which only need C0.* as the offset
delay is zero.

(For the 85031B= C0=92.85)



for the 85050B, C0=90.4799



2) Purposely putting in the wrong value of C0, it might be possible to get
any kit to work at least overy a limited frequency range. There’s some
information on pages 11 & 12 here




that might indicate that would work.

Regarding to the delay offset, I'm not sure on how to apply it to the

calibration terms.

Is it correct to apply electronic delay before error term calculations?

Yes, I believe so. As I understand it.

1) The VNA measures the calibration standards.

2) From the raw measurement data collected by the VNA of the standards,
*and* the mathematical model of the calibration standards (real and
imaginary part of the impedance), the error terms are calculated. The
error terms can not possibly be worked out without knowing everything
about those calibration standards, including the delay. Jeff, k6jca has
convinced me that C1, C2 and C3 can be ignored - at least for high end kits
over the frequency range of the NanoVNA.

3) The error terms are applied to all measurements.

I have no ifea

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

Ken,
There are 3 file types that can be generated when new firmware is created: bin, hex & S19
The 'Windows DFU File' manager is used to convert from one format to another and produce the dfu file from any one of the 3 types above.
The manager is installed when you install the DefuSe uility.
If the DefuSe utility is telling you that you've got the wrong file format, it's not dfu or it's a corrupted dfu file.
Grab the release zip from github and pull out and convert the bin to a dfu and you should be good to go.
...Larry

When I first started out looking at the NanoVNA, there wasn't any open
source software, thus my little attempt at a simple Python app.

Has this software been made open source? Or is it simply modded binaries?

When I looked at first, Hugen seemed very adamant that he wouldn't make his
software Open Source.

If it is open, I would look at it for inspiration :-)

--
Rune / 5Q5R

I think I'll just run mine on a USB Battery Bank. Sounds like less problems, longer life, and less chance of leakage, explosion etc ruining the device.

On Tue, Oct 8, 2019 at 12:43 PM, Mike_nano wrote:

a forum should be started

Who will host it?

--
73
Richard
G4TGJ

I have an early nanovna, I think - no shields and no silkscreen for Ch0. Trying to send back, as no S21 measurement, just noise. I tried updating firmware, using the STM app. When choosing dfu file, I immediately got message "incorrect file format", even before uploading to unit.. Should all dfu files be compatible with all nanovnas and the version of STM boot-loader that everyone seems to be using? Thank you.

Dr. Kirkby,
Excellent suggestion. Especially, for myself, the beginners section.
Thank you.
Regards,
James Douglass
Garden City, Kansas
USA

Hello Ralph,

You could also omit the "-d 0483:df11" parameter from the dfu-util command line.
Ralph

Thank you for the hint, but see the man page:
-d, --device [Run-Time VENDOR]:[Run-Time PRODUCT][,[DFU Mode VENDOR]:[DFU Mode
PRODUCT]]
Specify run-time and/or DFU mode vendor and/or product IDs of the DFU
device to work with. VENDOR and PRODUCT are hexadecimal numbers (no pre-
fix needed), "*" (match any), or "-" (match nothing). By default, any
DFU capable device in either run-time or DFU mode will be considered.

If you only have one standards-compliant DFU device attached to your
computer, this parameter is optional. However, as soon as you have mul-
tiple DFU devices connected, dfu-util will detect this and abort, asking
you to specify which device to use.

If you have more than one DFU device on the USB bus it will be a problem,
so I think it is saver to add this option.

73, Rudi DL5FA

And here I am adding to the noise. But! the daily digest works! A bit late on some announcements, perhaps, but
I can catch up. I'm not in that big of a hurry. I get to see a SUMMARY of all the posts by subject line and
I read about a topic and it's thread only if I wish. No wading through dozens of posts to get to what I want.
And if I have a particular set of threads I want to revisit, I save the digest so I can go immediately to the stuff
I want. And, I get to see a summary of replies, which is probably where this post will wind up.

Daily digests cut waaaay down on the traffic. In fact, I didn't even notice the "inflation" because I don't see all those
posts..

Just my 2 cents.

Bruce, K4TQL

On Tue, Oct 8, 2019 at 07:01 AM, Dr. David Kirkby from Kirkby Microwave Ltd wrote:

* Combination analyzers

with the latter having SA & VNA capabilities.

Been there. done that.
This is my combined 3GHz VNA and 2GHz SA with TG
Problem with this setup is the minimum VNA frequency of 35MHz due to the re-use of the two ADF4351 modules.
The nanoVNA solves that problem.
But this CA is neither nano or cheap.
Having a generator that can go both high and low in frequency is expensive.

If you search this forum, you will find messages about the limited life of the very small RF connectors on this board.

google defective?