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Hi

During alignment or design iterations of a filter seeing the 1 dB, 3 dB, 6 dB and "many" dB points are quite handy.

Bo

1) I installed the NanoVNA-H__800_ch_20191003 version and now it no longer crashes (after the screen calibration, with or without saving).
With 4 tracks the fonts are now very small ... this is a problem for me.

2) In session "Upgrade or Verify Action", the program does not allow me to load the file DMR-CLEAR_MEMORY_DFU.dfu ... Response: "This file doesn't have a correct format..."
Why?

On Sat, Oct 5, 2019 at 01:43 PM, @in3elx wrote:

On Sat, Oct 5, 2019 at 02:28 AM, Larry Rothman wrote:

If you calibrate the touchscreen, it will lock-up at boot.?Please

confirm.?

On Fri, 4 Oct 2019 at 7:59 PM, in3elx@...<in3elx@...> wrote:

I

installed the NanoVNA__800_aa_20191003 firmware. I think this is fine, it

has

improved to 300Mhz ...

I confirm, it also crashes with the "aa" version of 03 October ...
1) press CONFIG
2) I press TOUCH CAL
3) eseguo calibrazione
4) restart
5) blocked initial screen (with info...frozen boot ..)

Now I try to clean and then install NanoVNA-H__800_ch_20191003.

AA version font requires a larger flash, resulting in saving the settings of the flash address overlaps with the program flash and I will modify the aa version later.

On Sat, Oct 5, 2019 at 02:28 AM, Larry Rothman wrote:

If you calibrate the touchscreen, it will lock-up at boot.?Please confirm.?



On Fri, 4 Oct 2019 at 7:59 PM, in3elx@...<in3elx@...> wrote: I
installed the NanoVNA__800_aa_20191003 firmware. I think this is fine, it has
improved to 300Mhz ...

I confirm, it also crashes with the "aa" version of 03 October ...
1) press CONFIG
2) I press TOUCH CAL
3) eseguo calibrazione
4) restart
5) blocked initial screen (with info...frozen boot ..)

Now I try to clean and then install NanoVNA-H__800_ch_20191003.

Rune,
Thanks, let us know if you get any additional info. Do you know how things are progressing between nanoVNA-saver and the NanoVNA-F? The command set doesn't seem to be as homogeneous as the NanoVNA-F developers insinuated.

Herb

Mike,
I agree on all points. I come from a test and measurement background, so -3 dB was always drummed into me with regards to equipment purchasing and test standards. I was only fore warning Rune that if he added automatic S21 filter measurements for -6 dB and -60 dB rise and fall points, to get ready for the ground swell of people requesting the -3 dB point points be included also.

If I design a Butterworth filter I already know its going to fall off at -20 dB/decade, but I need to verify my -3 dB point to ensure my has not started falling off too soon or too late.

Herb

On Fri, Oct 4, 2019 at 07:13 PM, Oristo wrote:

The latest build code is 10KHz-1.5GHz

Is there a good recent aa 10KHz-1.5GHz build?

----------------------------------------------------------------------------------

The 10khz-1.5GHz is not an official build but was done by one of our members at the request of another member. The newest build was in the message a few posts back, /g/nanovna-users/message/4073 .

Herb

I see anomalies in the plots if using more than a value of '1' in the "Segments" cell. See attached image:
this is a 320 MHz Low Pass Filter and the protrusion around 500 MHz on the gain plot is one of the anomalies.
Is NanoVNA-Saver only intended to work with certain firmware versions? That could be my issue.


Version info:
ch> version
0.2.2
ch> info
Kernel: 4.0.0
Compiler: GCC 8.2.1 20181213 (release) [gcc-8-branch revision 267074]
Architecture: ARMv6-M
Core Variant: Cortex-M0
Port Info: Preemption through NMI
Platform: STM32F072xB Entry Level Medium Density devices
Board: NanoVNA
Build time: Sep 29 2019 - 02:24:31

Herb, bandwidth is always stated with respect to 3 db points.? But rolloff is 6 to 60db.
Mike WY6K


"... somewhere in the distance, there's a tower and a light, broadcastin' the resistance, through the rain and through the night..."

Please perform a touchscreen calibration, save, touchtest and cycle the power

I have bad hand-eye coordination and break code claimed good,
so did not even try, just installed DMR's rar

The latest build code is 10KHz-1.5GHz

Is there a good recent aa 10KHz-1.5GHz build?

Why are you selling?
Mike WY6K


"... somewhere in the distance, there's a tower and a light, broadcastin' the resistance, through the rain and through the night..."

Please perform a touchscreen calibration, save, touchtest and cycle the power.?Does it lock-up?



On Fri, 4 Oct 2019 at 9:28 PM, Oristo<ormpoa@...> wrote: > Do not use hugen's Oct 2 'AA' firmware versions.

?They cause the nano to lock-up after touchscreen calibration.

Doh!!? I just installed NanoVNA-H__900_aa_20191003.dfu for hacking a new menu tree

Do not use hugen's Oct 2 'AA' firmware versions.
?They cause the nano to lock-up after touchscreen calibration.

Doh!! I just installed NanoVNA-H__900_aa_20191003.dfu for hacking a new menu tree

If you calibrate the touchscreen, it will lock-up at boot.?Please confirm.?



On Fri, 4 Oct 2019 at 7:59 PM, in3elx@...<in3elx@...> wrote: I installed the NanoVNA__800_aa_20191003 firmware. I think this is fine, it has improved to 300Mhz ...

I installed the NanoVNA__800_aa_20191003 firmware. I think this is fine, it has improved to 300Mhz ...

On Fri, 4 Oct 2019 at 19:58, Rune Broberg <mihtjel@...> wrote:

Hi David,
your suggestion of interfacing with the HP 8753 is certainly interesting! I
am going to have the code reworked at some point to accept more VNA types,
so an 8753 option isn't completely impossible.

Since I want to use my NanoVNA/P, I doubt that I will use your software for
now. But it had crossed my mind that perhaps look at modifying it later -
once your rapid development had slowed. ????

As of now, though, I have no

way I would be able to test it, and that's likely to block any progress
towards it for the foreseeable future. I wouldn't want to be releasing
software that I no way to verify was actually running.

Since you intend supporting others VNAs, if the code was commented well,
and structured in such a way to give others the chance to add code for
other VNAs, others could add support for an 8753.

If you ignored setting up an 8753 (start frequency, source power,
calibration, etc) but only read the data, it would probably be easy to test
with remote access via ssh to a linux machine with an 8753 on the GPIB bus.

I have remote access at night to a 67 GHz Agilent PNA-X, with tons of
options. That is nice to play with! I only wish I owned the hardware, which
I expect is a similar cost to my house - perhaps even more so.

I don’t know what information you get from the NanoVNA,

There might be someone local who has one, but barring that, I don't think
I'll work on it for now :-)

I think you have enough with the NanoVNA for now. I expect I get a
NanoVNA-F, as I want a larger screen. But I will wait for prices to fall,
as I am not in any hurry.

--
Rune / 5Q5R

On Fri, 4 Oct 2019 at 15:10, Dr. David Kirkby from Kirkby Microwave Ltd <
drkirkby@...> wrote:

On Fri, 4 Oct 2019 at 13:55, Rune Broberg <mihtjel@...> wrote:

If there are any miscalculations in my software, I do what I can to

correct

them. I have not recently been made aware of any problems, and at no

point

by Owen. I hope that any of you would immediately contact me, should

you

find errors in NanoVNA-Saver! :-)

I have not read the article by Owen, but I would agree on this single

point

about return loss. But I never commented to you, as it is a subject of

much

debate. If there was a very clear majorty for one convention or the

other,

I would stay you should go with it, but there's not a clear majority, so
use whatever you want.

If I was to use your software, which I might well do, but m interest is

in

portable use, without external software, I would probably recompile and
change the sign. My HP LCR meter allows one to display this R+jX think in
multiple formats. I could give them to you if you wanted, but again, you
know what space you have.

While I am sending you a message, there's something else I thought of

that

could be of use to many people, but you might not want to get involved

in,

so I did not bother. Your software could be useful to those of us with

the

very popular HP 8753 series VNA. It would be good if you could support
reading from them too. The Python code to open a GPIB code and read from

it

is about 5 lines long. Much of the other commands you use to set up a
NonVNA would have an equivalent in 8753.

--

Rune / 5Q5R

--
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

--

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

@in3elx
The latest build code is 10KHz-1.5GHz

If you're interested in learning the Python programming language so you can play with some of the open-source software development that is being done by various forum members, a free 660+ page reference book has been made available online in PDF format.


.

Enjoy!

Larry

Do not use hugen's Oct 2 'AA' firmware versions.?They cause the nano to lock-up after touchscreen calibration.?I have the 'CH' version installed and it is working so far
Remember to do full calibration after installing new firmware.?



On Fri, 4 Oct 2019 at 5:30 PM, in3elx@...<in3elx@...> wrote: Thanks for all these info, compliments.

This interests me:
"DMR_M_10KHz_sept-13-19.dfu
Such as these were for enhancements, in this case 10KHz instead of 50KHz minimum.
I >>guess<< many enhancements are in Gen Hu Oct 2 firmware"
- Should this be installed before or after the firmware?

- Which firmware can be used to set an impedance different than 50 Ohm?