Wow! Bright lights, movie stars.
- Herb
|
Stay far away from this 3rd party seller.? There are typos all throughout their company info and their shipping policy looks strange and has many spelling mistakes as well.?
On Tue, 12 Nov 2019 at 8:12 PM, DuWayne Schmidlkofer<duwayne@...> wrote: I was browsing for something else when this link popped up.
--
DuWayne? KV4QB
|
I was browsing for something else when this link popped up.
--
DuWayne? KV4QB
|
Now that the capability is there in the software, how would one use the NanoVNA to check a toroid's permeability? New territory for me... :-)
|
@Tom VA7TA
Did you change "Display setup / Font / Font size" with too large font?
73, Lucio
|
Re: NanoVNA does not want to start -solved
Don't look too far. The chips can be found on Ebay. Search string: 10 PCS IP5305 SOP-8 IP 5305 IC CHIP
on1bes Herman
|
I never had to use Zadig in Windows 10 64bit to use DFUseDemo. This is probably a problem by you. Put your Hardware Device Manager window on and examinate following. Try uninstalling Zadig (actually a USB driver) until it no longer appears in Hardware Devive Manager window. This may have to be done multiple times. In the View menu, put the option "show hidden devices", you will see them grayed out in the list, and see if there is an earlier installation of Zadig (Zadig itself is not visible, but 'USB lib device' or something similar - i have not the exact names, but don't delete the 'Universal Serial-Bus Controllers'!) delete or uninstall all gray drivers until they are gone. The Wiki Files contains the manual of DFUseDemo and its installation. Follow it carefully. I test it again here, and you don't need Zadig. If you connect the Nano, with the boot button pressed, a "STM Device in DFU Mode" will first appear in Hardware Device Manager (with a yellow triangle). If you wait 20 seconds, the driver is automatically loaded in Windows, and the "STM Device in DFU Mode" is added to the list "Universal Serial-Bus Controllers". If you turn the Nano off, "STM Device in DFU Mode" will remain in the list, but then turn gray.
on1bes
|
I am running Windows10 Home 64 Bit, and had DFUsDemo running OK
After a firmware update (Erics Version 2.3) suddenly DFUSE Demo no more sees my NanoVNA-H .
Windows devicemanager shows the the device in DFU mode as "STM32 Bootloader" and when I run Zadig I can select "STM32 Bootloader" and install the drivers.
In the device manager I see for "STM32 bootloader" these drivers : WinUSB.sys, WdfCoinstaller01011.dll and WinUSBcoinstaller2.dll are these correct ??
I uninstalled and re-installed DFUseDemo, whatever i do, nothing helps.
So now I can no more.update the firmware !
Is there anyone who can help to solve this problem ?
Many thanks in advance
Jos
|
On Tue, Nov 12, 2019 at 09:37 AM, WB2UAQ wrote: " Just wish it could measure higher impedances more accurately " ----------------------------------------------------------------------------------------------------------- An HP8753 would not have helped you to measure higher impedances, I used one for years in my workplace and once you got too far off of 50 ohms the accuracy declined. In general, I believe that is true with all VNA's with a 50 ohm input impedance. The HP8753 also started at 300 kHz which meant my company had to purchase a second VNA for lower measurements. I'd love to own a HP 8753 but I also know I can't afford the maintenance costs that would eventually be required. - Herb
|
Hi I'm a newbie when it comes to the NANOVNA but over the years I have been involved with many different aspects of radio both amuter and professional.
SMA connectors are not intended for repeated connection and reconnection, there is little or no strain relief with SMA connectors, use good quality connectors and cable, use large radius no sharp bends in test environment.
When the integrity of a connection is of concern (SMA connectors on NANO) and the connectors have to be connected or reconnected many times, for example in testing and re testing/integration it is common to fit additional sacrificial connectors to those on the unit (I have). This is to prevent damaging the connector's and can be replaced and still preserving the integrity of the main connector.
--
Raymond G8KPS
|
I am thinking that the point of putting the nano in an enclosure is to stabilize the
poor isolation, not necessarily to eliminate it. But when the nano's leak is stabilized,
the ISOL CAL should then enable good correction.
This assumes that what goes outside the enclosure is done with good quality
cables (at least with respect to leakage) that are terminated. It would probably
help to terminate the ends in items that roughly duplicate the impedances that
the DUT will provide, although this is admittedly not very practical in most
cases.
BTW, SMA(M) cables that are left dangling with nothing connected can exhibit
wildly variable leakage from the ends. The center pin is coupled capacitively
to the nut, whose contact to the main body of the connector can range from only
fair to non-existent, depending on how it is laying (i.e., on what forces are acting
on the nut and from what directions, etc). RF leakage of this kind leads to RF
currents on the outside of the cable, which can resonate at various frequencies.
radiate to nearby cables that are similarly indisposed, etc. So even if you can't
spare good terminations, at least screw each cable end onto something that is
well-shielded for the isolation CAL step.
Dana
|
Hi Rune,
Many thanks again for your ongoing development of nanoVNA-Saver - fabulous work!
I am not sure if I should waste your time reporting this as it is not a significant issue....just apple polishing.
I noticed when I first start version 0.2.0 that the Center, Stop and Span frequency info within "Sweep Control" section overflows the window widths. At startup it displays 9 digits as shown below. Once I enter new sweep control frequencies it displays normally. However Center still overflows just a little. I have my sweep Stop set at 850M and the Center is showing 425.025MHz which just exceeds the window width by about a half digit. With initialization the data is about twice as wide as the window width with the most significant digits hidden from view then it reverts to normal upon receiving a new manual frequency entry.
Initialization displayed data:
SPAN 849.949952MHz
STOP 849.999952MHz
CENTER 425.024976MHz
Hope this feedback is useful.
--
Best Regards,
Tom
VA7TA
|
Re: Correction menu option ?
|
Thanks for doing the test Nick! I guess we are all having a great time working with this little unit. I was considering buying an 8753 and retrofitting it with an after-marked LCD display but I think for what I am doing now the Nanovna is all I need. Just wish it could measure higher impedances more accurately but when that is needed I have used my old General Radio bridges.
|
I am using the free STM32CUBEIDE from ST Micro the Mc manufacture
to build some SDR control code for a home project and it seems to work well. I guess STM32CubeMX integration and STM support are main claims to fame for STM32CUBEIDE, which otherwise is another customization of ECLIPSE?/CDT IDE. NanoVNA uses ChibiOS, which has a dedicated ECLIPSE?-based IDE, namely ChibiStudio, and a utility for converting CubeMX output for ChibiOS ... which is already done for nanoVNA source, then STM32CUBEIDE seems for ChibiOS firmware a step backwards from ChibiStudio
|
Re: errors of "error" models
[ann] next-to-come : on the measurement of s-parameters using the [LeastVNA] only
|
Re: Correction menu option ?
Why would you want to ever disable this?
|
Re: [nanovna-f] NanoVNA-Saver 0.2.0
An excellent piece of software just got better. Congratulations and thanks for your efforts !73 de YO4AUL
toggle quoted message
Show quoted text
On Tuesday, November 12, 2019, 03:35:23 PM GMT+2, Rune Broberg <mihtjel@...> wrote:
Earlier today I released NanoVNA-Saver 0.2.0: notes:New feature: Zooming
This release adds the ability to "zoom" on the frequency-based charts: Use your mouse's scroll wheel to zoom in and out - or hold the control button and drag a box on the chart to zoom into.
New chart type: Group Delay
Group delay can now be displayed as a chart, and can also be enabled for the marker data display for both S11 and S21.
New chart type: Permeability
A new chart, R/¦Ø & X/¦Ø, is available for determining permeability characteristics of toroids. Thanks to David, F4HTQ, for requesting and helping out with this.
Logarithmic Y-scale:
The VSWR and Permeability charts now have the option of having the Y-scale shown as Linear or Logarithmic.
Changes to markers:
Now able to display Group Delay for S11 and S21
Markers can be filled or "hollow"
Markers can be shown centered, or with the point at the tip
Markers can be locked from mouse control by selecting the radio button next to "Show/Hide data"
Time-delay reflectometry:
Min/max impedance values can be manually set
There's a movable marker to measure distance in the TDR chart
New scaling function for values:
Holger M¨¹ller, DG5DBH, contributed new code to show values more correctly, using SI-prefixes. David Hunt provided further changes to avoid losing precision when displaying frequencies for sweep settings.
Also included: Several bug fixes!
As ever, I look forward to hearing about any feedback, suggestions and bugs!
Thank you very much to all the kind testers, many of whom were recruited on these very mailing lists!--?Rune / 5Q5R
|
This is a little off topic however I reply to the question on firmware development enviroment. I am using the free STM32CUBEIDE from ST Micro the Mc manufacture to build some SDR control code for a home project and it seems to work well. On Tue, Nov 12, 2019, 7:42 AM vaclav_sal via Groups.Io <vaclav_sal= [email protected]> wrote: On Tue, Nov 12, 2019 at 05:35 AM, Rune Broberg wrote:
As ever, I look forward to hearing about any feedback, suggestions and
bugs!
Thank you very much to all the kind testers, many of whom were recruited on
these very mailing lists!
Rune,
since I now know that you are an actual coder / developer , I like to ask
/ give a feedback if as "not recently experienced person" is allowed.
1. What is your development tool ? ( In few words , do not want to take
too much of your time ).
2. I understand that NanoVNA is "an embedded processor " hardware. As of
today I do not own one, I started with "cloning" software - my choice. I am
making progress going that direction.
Along that line - real technical question - how can I add standard ANSI C
"includes " ? Perhaps C++ I/O ( cout ) includes so I can trace the code
flow using I/O to standard console? For debugging purposes - not to be
included in final code to flash to NanoVNA memory.
3. Related to above point #2 ¨C example code . How can I print this code
output to standard I/O file / console ? (Besides makefile I do not see
other ways to option the compilation / linking - no such options in
Eclipse Egit )
// test access
int a = 3;
#ifdef DEBUG
chsnprintf("Test print ",10,"%d2", a );
#endif
4. Here is a minor feedback ¨C just warning by make
z@z-desktop:~/git/NanoVNA-H-GIT$ make
Compiling main.c
main.c: In function 'hard_fault_handler_c':
main.c:2189:1: warning: stack usage computation not supported for this
target
}
^
Linking build/ch.elf
Creating build/ch.hex
Creating build/ch.bin
Creating build/ch.dmp
text data bss dec hex filename
92904 5028 11544 109476 1aba4 build/ch.elf
Creating build/ch.list
Done
|
Golden rule of reducing uncertainty, use the connector type that you will be using to connect directly to
the equipment / antenna that you test.
Otherwise, I'd need more adapters to connect to a different type calibration kit that introduces just as
much uncertainty as the original UHF style connector.
I calculated that even at 500Mhz, my quick bodge PL259 cal kit would introduce 0..2 ohms on the 50R
load and a phase error of 3 degrees, and that's what I see.
So for those of us that are really 0-50Mhz users it's more than good enough, and certainly accurate enough
as a daily driver even at UHF.
Heck, I've relied upon no more than 2 x 1N4148's and an LED to tune my HF stuff up -
Even my HF amp uses one (see attached). (And that uses audio style push connectors for the antenna output) ;-)))
So using a vna like this is overkill for some of us.
The nice thing is, if at anytime my requirements change, then I just change the bulkhead connectors to suit
The larger box also allows me to introduce a larger battery if I need it.
At some time in the next few years that tiny Li-Ion is gonna fail and I may have difficulty replacing it.
With the extra space in the box, I could go for a a bunch of AA's, or even just a single 2000mah 18650 cell.
It works, it's future proof, no messy switch extensions, it KISS.
Time to think about an external component test fixture next to keep me amused.
Ideas anyone ?
73 de Andy
|
DuWayne Schmidlkofer
Oristo
gin&pez@arg
