|
|
Dear Bob
This morning I was a bit worried that something could have gone wrong while replacing firmwares.
After having read several messages saying that nothing bad could really happen, I decided to give a try.
This group includes a wiki section explaining it all.
It's just about installing a driver, and an application. If one carefully reads the instructions, it will take not more than 15 minutes the first time, and less than 2 afterwards.
I had a good reason to change the firmware, and if you are happy with your device, then its true that it makes not really sense to change something.
73 de HB9IIU
|
Bob & Dick,Please refer to the forum Wiki and files sections for answers to your questions.? There are links at the bottom of every forum email message or to the top left of the webpage.?
There are instructions there on how to update.?
You can do this from Windows (preferred) or Linux a little more involved.?
I am investigating a way to do it with Android but that is even less inviting at this point.?
... Larry
On Sat, 2 Nov 2019 at 5:36 PM, Bob Albert via Groups.Io<bob91343@...> wrote: I asked that question but got no useful replies.? After some investigation I discovered that updating is not simple.? There are two ways, each requiring special software or hardware.? The hardware is a little item that costs a few bucks and is made by/for one of the manufacturers of the processor.
I also haven't been able to find a program to run from android.
Since I am actually happy with the way my nanoVNA works, I probably won't go to the trouble or risk to update it.
Bob
toggle quoted message
Show quoted text
On Saturday, November 2, 2019, 02:29:22 PM PDT, Dick <w1ksz@...> wrote: Dumb Question time ... I see many comments about updating the firmware, but nothing on a procedure to do so ? Does it automatically update once the Nano senses a firmware update or is there more too it ? Thanks, Dick, W1KSZ ________________________________ From: [email protected] < [email protected]> on behalf of Jim Allyn - N7JA <jim@...> Sent: Saturday, November 2, 2019 11:52 AM To: [email protected] < [email protected]> Subject: Re: [nanovna-users] Brick my Nano On 11/1/19 11:27 PM, hb9 iiu wrote: What are the chances that I brick my NanoVNA when trying to upload a new firmware? ? ? ? Very, very slim, I would say.? There are probably several billion of those processors in use in various gadgets around the world, many of which get updated regularly.? Some people update their Nanos on a near daily basis, and the developers might update several or even dozens of times in a day.? I wouldn't worry about it.
|
I asked that question but got no useful replies.? After some investigation I discovered that updating is not simple.? There are two ways, each requiring special software or hardware.? The hardware is a little item that costs a few bucks and is made by/for one of the manufacturers of the processor.
I also haven't been able to find a program to run from android.
Since I am actually happy with the way my nanoVNA works, I probably won't go to the trouble or risk to update it.
Bob
toggle quoted message
Show quoted text
On Saturday, November 2, 2019, 02:29:22 PM PDT, Dick <w1ksz@...> wrote: Dumb Question time ... I see many comments about updating the firmware, but nothing on a procedure to do so ? Does it automatically update once the Nano senses a firmware update or is there more too it ? Thanks, Dick, W1KSZ ________________________________ From: [email protected] < [email protected]> on behalf of Jim Allyn - N7JA <jim@...> Sent: Saturday, November 2, 2019 11:52 AM To: [email protected] < [email protected]> Subject: Re: [nanovna-users] Brick my Nano On 11/1/19 11:27 PM, hb9 iiu wrote: What are the chances that I brick my NanoVNA when trying to upload a new firmware? ? ? ? Very, very slim, I would say.? There are probably several billion of those processors in use in various gadgets around the world, many of which get updated regularly.? Some people update their Nanos on a near daily basis, and the developers might update several or even dozens of times in a day.? I wouldn't worry about it.
|
Dumb Question time ... I see many comments about updating the firmware, but nothing on a procedure to do so ? Does it automatically update once the Nano senses a firmware update or is there more too it ? Thanks, Dick, W1KSZ ________________________________ From: [email protected] < [email protected]> on behalf of Jim Allyn - N7JA <jim@...> Sent: Saturday, November 2, 2019 11:52 AM To: [email protected] < [email protected]> Subject: Re: [nanovna-users] Brick my Nano On 11/1/19 11:27 PM, hb9 iiu wrote: What are the chances that I brick my NanoVNA when trying to upload a new firmware? Very, very slim, I would say. There are probably several billion of those processors in use in various gadgets around the world, many of which get updated regularly. Some people update their Nanos on a near daily basis, and the developers might update several or even dozens of times in a day. I wouldn't worry about it.
|
Re: errors of "error" models
HI Gary - The Maxima install was uneventful here under Windows 10 on my desktop. Did you only follow these instructions: .. without any DataExecutionPrevention steps?
|
The Tracking Number the Seller gave me was for a package delivered to Colorado (I am in Arizona !!). Guess it's time to pulse e-Bay/PayPal. Tnx, Dick, W1KSZ ________________________________ From: [email protected] < [email protected]> on behalf of Roy Appleton <twelveoclockhigh@...> Sent: Saturday, November 2, 2019 8:13 AM To: [email protected] < [email protected]> Subject: Re: [nanovna-users] Deal on ebay Just got my money back from the last bogus eBay listing at $19.95! Roy WA0YMH On Sat, Nov 2, 2019, 9:20 AM hb9 iiu <hb9iiu@...> wrote: Just ordered one for fun at $15.99... ref 254398992632
|
NanoVNA with antenna or component detailed Analysis:
By Jeff King Zl4AI
First step is to saving S1p and S2p Files:
Yes you can do a lot with SP1 Files. The following software allows directly reading:
SWR - Standing Wave Ratio
Rs - Resistance, series form
Xs - Reactance, series form
Zmag - Impedance magnitude
Theta (deg) - Impedance angle
Rho (mag) - Reflection coefficient magnitude
RL (dB) - Return Loss, plotted as a negative number to show "reverse" scale (see note below)
Phase (deg) - Reflection coefficient angle
% Reflected Power
Q - Quality factor, |Xs| / Rs
Rp - Resistance, parallel form
Xp - Reactance, parallel form
Ls (?H) - Equivalent inductance for series Xs, both positive and negative
Cs (pF) - Equivalent capacitance for series Xs, both positive and negative
Lp (?H) - Equivalent inductance for parallel Xp, both positive and negative
Cp (pF) - Equivalent capacitance for parallel Xp, both positive and negative
Download:
Zplots.xlsx from AC6LA
and Rigexpert
and Sim Smith
From ZL4AI
|
Re: Nanovna data output: Use the following other FREE software
Hi Jeff,
out of interest: Is there anything there that you think is missing in
NanoVNA-Saver? I think I have it all covered, but I'm always eager to pick
up what might be missing.
--
Rune / 5Q5R
toggle quoted message
Show quoted text
On Sat, 2 Nov 2019 at 21:00, Jeff King <jking2603@...> wrote: This file shows 3 software programs to get all the information you need
with antenna or component
detailed Analysis.pdf
You can extract:
SWR - Standing Wave Ratio
Rs - Resistance, series form
Xs - Reactance, series form
Zmag - Impedance magnitude
Theta (deg) - Impedance angle
Rho (mag) - Reflection coefficient magnitude
RL (dB) - Return Loss, plotted as a negative number to show "reverse"
scale (see note below)
Phase (deg) - Reflection coefficient angle
% Reflected Power
Q - Quality factor, |Xs| / Rs
Rp - Resistance, parallel form
Xp - Reactance, parallel form
Ls (?H) - Equivalent inductance for series Xs, both positive and
negative
Cs (pF) - Equivalent capacitance for series Xs, both positive and
negative
Lp (?H) - Equivalent inductance for parallel Xp, both positive and
negative
Cp (pF) - Equivalent capacitance for parallel Xp, both positive and
negative
|
Re: Nanovna data output: Use the following other FREE software
with antenna or component detailed Analysis.pdf The link is not working
URLs with blanks will be problematic, but that PDF just has 3 more URLs: Zplots.xlsx from AC6LA Rigexpert Sim Smith .. which are already here: /g/nanovna-users/wiki/External-links
|
Re: Android NanoVNA WebApp - does not work on version 6x
I have a Samsung S7 Edge actually Android 8.
I did already many test for the nanoVNA with chrome without succes.
I downloaded nanoVNA app it didn't work.
Yesterday I used a normal OTG cable instead of the Samsung micro USB to USB A Stick delivered with the S7 and bingo i could connect and it worked.
--
ON8DC Erik
|
Re: Nanovna data output: Use the following other FREE software
On Sat, Nov 2, 2019 at 09:00 PM, Jeff King wrote:
This file shows 3 software programs to get all the information you need
with antenna or component detailed
Analysis.pdf
You can extract:
SWR - Standing Wave Ratio
Rs - Resistance, series form
Xs - Reactance, series form
Zmag - Impedance magnitude
Theta (deg) - Impedance angle
Rho (mag) - Reflection coefficient magnitude
RL (dB) - Return Loss, plotted as a negative number to show "reverse"
scale (see note below)
Phase (deg) - Reflection coefficient angle
% Reflected Power
Q - Quality factor, |Xs| / Rs
Rp - Resistance, parallel form
Xp - Reactance, parallel form
Ls (?H) - Equivalent inductance for series Xs, both positive and negative
Cs (pF) - Equivalent capacitance for series Xs, both positive and negative
Lp (?H) - Equivalent inductance for parallel Xp, both positive and
negative
Cp (pF) - Equivalent capacitance for parallel Xp, both positive and
negative
The link is not working
|
Re: 50ohm cal load failed
Well, my HP was calibrated decades ago before I retired. and like you say
for fun stuff it is good enough. I prefer to roll my own now. Close
enough is good for me.
Mel, K6KBE
toggle quoted message
Show quoted text
On Sat, Nov 2, 2019 at 12:57 PM hwalker <herbwalker2476@...> wrote: On Sat, Nov 2, 2019 at 10:46 AM, Mel Farrer, K6KBE wrote:
I have a set of SS SMA PCB mount male connectors that I soldered 4 200
ohms
0603 resistors around the clock, 12,3,6,9 and it measures very close to my
HP SMA termination.
----------------------------------------------------------------------------------------------------------------
Mel,
I used a commercially made HP 50 ohm termination as my standard until
David Taylor pointed out that even though it was manufactured by HP its
s-parameter specs were lukewarm at best. My S11 measurements on known
devices were slightly off, but that was because my NanoVNA OSL calibration
was made with a load that was slightly off. Changing to a Mini-Circuits 50
ohm load with known s-parameter specs up to 18 GHz solved the problem. To
my point, what you have observed may not reflect accuracy unless your HP
termination is well characterized.
Of course if you are just using the NanoVNA in a hobbyist environment
where measurements within 5 - 10% are acceptable, then pretty much any 50
ohm load or termination assembled using good rf techniques should do.
- Herb
|
Re: Nanovna data output: Use the following other FREE software
This file shows 3 software programs to get all the information you need
with antenna or component detailed Analysis.pdf
You can extract:
SWR - Standing Wave Ratio
Rs - Resistance, series form
Xs - Reactance, series form
Zmag - Impedance magnitude
Theta (deg) - Impedance angle
Rho (mag) - Reflection coefficient magnitude
RL (dB) - Return Loss, plotted as a negative number to show "reverse" scale (see note below)
Phase (deg) - Reflection coefficient angle
% Reflected Power
Q - Quality factor, |Xs| / Rs
Rp - Resistance, parallel form
Xp - Reactance, parallel form
Ls (?H) - Equivalent inductance for series Xs, both positive and negative
Cs (pF) - Equivalent capacitance for series Xs, both positive and negative
Lp (?H) - Equivalent inductance for parallel Xp, both positive and negative
Cp (pF) - Equivalent capacitance for parallel Xp, both positive and negative
|
Re: 50ohm cal load failed
On Sat, Nov 2, 2019 at 10:46 AM, Mel Farrer, K6KBE wrote:
I have a set of SS SMA PCB mount male connectors that I soldered 4 200 ohms
0603 resistors around the clock, 12,3,6,9 and it measures very close to my
HP SMA termination.
---------------------------------------------------------------------------------------------------------------- Mel, I used a commercially made HP 50 ohm termination as my standard until David Taylor pointed out that even though it was manufactured by HP its s-parameter specs were lukewarm at best. My S11 measurements on known devices were slightly off, but that was because my NanoVNA OSL calibration was made with a load that was slightly off. Changing to a Mini-Circuits 50 ohm load with known s-parameter specs up to 18 GHz solved the problem. To my point, what you have observed may not reflect accuracy unless your HP termination is well characterized. Of course if you are just using the NanoVNA in a hobbyist environment where measurements within 5 - 10% are acceptable, then pretty much any 50 ohm load or termination assembled using good rf techniques should do. - Herb
|
Re: errors of "error" models
Sounds painful...
The Maxima install was uneventful here under Windows 10 on my desktop. It looks like learning how to use it is going to be my next hurdle. :-) I have verified that all three user interfaces appear to be working properly.
--
73
Gary, N3GO
|
On 11/1/19 11:27 PM, hb9 iiu wrote: What are the chances that I brick my NanoVNA when trying to upload a new firmware? ???? Very, very slim, I would say.? There are probably several billion of those processors in use in various gadgets around the world, many of which get updated regularly.? Some people update their Nanos on a near daily basis, and the developers might update several or even dozens of times in a day.? I wouldn't worry about it.
|
Re: Voltage sensing diode
Apologies - forgot the important bit.
|
Re: Voltage sensing diode
On Sat, Nov 2, 2019 at 12:46 PM, Rich NE1EE wrote: I didn't know why you liked the BAV99 until I just looked them up. Nice! It's a $0.02 device! Puzzled because the BAV99 data sheet says VF=0.7V max @ 1mA, and we are well
below that...so I'd expect much less than 0,7V offset. Yet you report 4.2V for
a 1V offset. On the whole, I really like the approach. I am using both diodes in the BAV99 package in series hence Vf ~1V with VBATEN set and ~0.5V with VBATEN unset. We're interested in Vf @ 1.5uA and 40uA. See attachment from a Nat Semi data sheet 0.25V and 0.425V respectively. Conveniently very close to my measurements ;) YMMV depending on the manufacturer. A lot of manufacturers don't specify Vf properly at <1mA. So I measured my sample device using a 0-20V bench supply, a 200kOhm 1% resistor and a calibrated meter. If I try the resistors, I'll just put in vbat_offset=1000mV, and live with the
increasing (small) error as voltage drops. It would be interesting to see how well it works. It has the advantage that it is more or less self calibrating with 1% resistors. No doubt the firmware could be modified to suit.
|
Re: 50ohm cal load failed
I have a set of SS SMA PCB mount male connectors that I soldered 4 200 ohms
0603 resistors around the clock, 12,3,6,9 and it measures very close to my
HP SMA termination.
Mel, K6KBE
toggle quoted message
Show quoted text
On Sat, Nov 2, 2019 at 10:38 AM hwalker <herbwalker2476@...> wrote: On Sat, Nov 2, 2019 at 09:56 AM, QRP RX wrote:
It looks like cheap Chinese SMA-terminators. If so, they have bad
performance.
Try to measure it with multimeter, does it have 50.0 ohm?
Most of all it has high error, something like ¡À5 ohm.
----------------------------------------------------------------------------------------------------------------
As QRP replied, there is a difference between a 50 ohm termination and a
good quality 50 ohm calibration load. That is why commercial calibration
kits cost so much money. Using an un-characterized termination, your OSL
calibration will look correct but you will be referencing all your
measurements to however good the termination is. For example if you use a
poor termination for performing your OSL calibration and then measure a
good quality load. The load will look poor.
Checking the termination with a multimeter only tells you what its DC
characteristics are. You need to measure the termination against a known
good quality load to verify its characteristics. It might prove worthwhile
to construct your own 50 ohm load using the methods presented by other
members of this group.
Herb
|
Dick
Oristo
Jim Allyn - N7JA
