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Re: Check impedance of an unknown coaxial cable

 

Try these:

/g/nanovna-users/topic/69269493
Check impedance of an unknown coaxial cable

 

Hi guys and greeting from Buenos Aires, Argentina. We're in full country quarantine since thursday, I was planning on buying some cable, but our govt acted so fast that I had no time, so I'm stuck at home with a couple of rolls of coaxial cable and wanting to improve my external antenna for my HT.
Have a Hugen VNA with Eddy 0.7 firmware but still don't trully know how to use it besides basic stuff.
They are probably 75ohm but from photos I found on the web some may actually be rg58, can you guys tell me how to use nanoVNA to know the cable impedance?

Thanks
Re: edy555 release 0.7.1-20200321 #firmware

 

Gyula wrote:

You will then need to use the ST-LINK utility with the following memory
parameters:
- Address: 0x08000000
- Size: 0x20000
- Data width: 8 bits
It seems that on MAC OSX, ST-Link is available with the terminal program, so
the .bin file can be uploaded - no need to convert .dfu.
Guyla, correct, no need to convert to .dfu, but dfu-util can update with the ch.bin file.

It is not necessary to install STLink (at least in 10.14.6), but is there some other benefit to installing it?

BTW, since Homebrew was originally used to install dfu-util, I could install STLink like this:
brew install stlink

--
I_B_Nbridgema
Re: V2 Design #nanovna-v2

 

Oh, I really hope we will not be disappointed by Gabriel's little baby. I'm waiting too long already...
Less noisy I hope at 900 MHz than VNWA and NanoVNA and finally 2.4 GHz!
Reinier

At least the Danish postal service has been notified 12 days ago, and it is just a matter of being patient ?
Re: V2 Design #nanovna-v2

 

On Sun, Mar 22, 2020 at 02:01 PM, <erik@...> wrote:

As I have an engineering sample I did not think a full review would be fair.
==========================================================

That's pretty much what I figured, or else you had signed a NDA :) I'd be bursting from the seams trying not to release a review. My wife says I am the lousiest person she knows at keeping a secret.

Are you planning on releasing a version of TAPR that supports the SAA-2? Also, have you tried the version of NanoVNA-saver that was modified for the SAA-2?

- Herb
Re: V2 Design #nanovna-v2

 

Hi Herb

At least the Danish postal service has been notified 12 days ago, and it is just a matter of being patient ?



-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af hwalker
Sendt: 22. marts 2020 21:37
Til: [email protected]
Emne: Re: [nanovna-users] V2 Design #NanoVNA-V2

On Sun, Mar 22, 2020 at 12:33 PM, Kurt Poulsen wrote:



.. As soon my SAA-2 arrives (I ordered it on the very first day it was offered by Tindie, and it has left sender country on the way to me) ========================================================



Kurt,

I'm sure group member's looking to make an informed purchase decision, be it a NanoVNA (-H, -H4, -F) or whatever, look forward to getting some credible S-A-A-2 reviews from knowledge user's.



I was hoping to erik would provide a review of the unit he received before the Coronavirus mucked up the distribution chain, but I think he been too busy modifying his TAPR software to work with the S-A-A-2 and developing other RF projects.



I think one person in Russia has recently reported receiving his order on this group, but no feedback has been provided - so far. Hopefully your delivery won't be far behind and with all the prior data that you have from the NanoVNA and DG8SAQ/VNWA, your prospective will carry a lot of weight.



- Herb
Re: V2 Design #nanovna-v2

 

As I have an engineering sample I did not think a full review would be fair.

--
NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK
Re: edy555 release 0.7.1-20200321 #firmware

 

Thanks Herb, yes I thought so, but wanted to be sure.

Jos

Op 22-3-2020 om 15:15 schreef hwalker:

On Sun, Mar 22, 2020 at 05:06 AM, Jos Stevens wrote:

Does the? edy555 release work on -H4 ? I guess not.
=================================================
Jos,
Always remember that the -F and -H4 use different processors than the NanoVNA (-H), therefore; require different firmware. All firmware from edy555 is currently only for the NanoVNA (-H).

hugen is the only developer currently releasing firmware for the -H4, so unless the firmware comes from him and is designated as for the -H4, be wary.

- Herb
Re: V2 Design #nanovna-v2

 

On Sun, Mar 22, 2020 at 12:33 PM, Kurt Poulsen wrote:

.. As soon my SAA-2 arrives (I ordered it on the very first day it was offered by Tindie, and it has left sender country on the way to me)
========================================================

Kurt,
I'm sure group member's looking to make an informed purchase decision, be it a NanoVNA (-H, -H4, -F) or whatever, look forward to getting some credible S-A-A-2 reviews from knowledge user's.

I was hoping to erik would provide a review of the unit he received before the Coronavirus mucked up the distribution chain, but I think he been too busy modifying his TAPR software to work with the S-A-A-2 and developing other RF projects.

I think one person in Russia has recently reported receiving his order on this group, but no feedback has been provided - so far. Hopefully your delivery won't be far behind and with all the prior data that you have from the NanoVNA and DG8SAQ/VNWA, your prospective will carry a lot of weight.

- Herb
Re: V2 Design #nanovna-v2

 

Hi Herb and others

As soon my SAA-2 arrives (I ordered it on the very first day it was offered by Tindie, and it has left sender country on the way to me) I will issue relevant data for the SDR-Kits of female Rosenberger parts. I have measurements to 8GHz for these part derived from a 4 port brand new R&S VNA. These data are stable for short open and thru adaptor and for the load there is minor differences for the shunt C. The R values for the load are measured individually by SDR- Kit with a 4 wire measuring test equipment against a 0.01% 50 ohm resistor. I will also issue a general document how to fine tune this shunt C by a sweep of a rigid cable based on a reference s1p Touchstone file generated by SimSmith and same open rigid line used to test a sweep round the Smitchart, to see if the average shunt C in the files provided already is OK.

I might also provide data for a male kit, time will show

I expect this to be successful ?

Kind regards

Kurt



-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af hwalker
Sendt: 22. marts 2020 17:49
Til: [email protected]
Emne: Re: [nanovna-users] V2 Design #NanoVNA-V2

On Sun, Mar 22, 2020 at 07:42 AM, David Feldman wrote:



... Battery (size per the hcxqsgroup page) and pigtail cable (type per the hcxqsgroup page) were ordered separately from domestic suppliers ..

==============================================

Dave,

More important than battery and the cables are the OSL standards. A VNA without accurate standards is like a computer without software -- pretty to look at but limited in use. Since you purchased the S-A-A-2, I assume you intend on using it to 3 GHz. In that case, you should look into the purchase of a quality OSL kit rated to 3 GHz or better. Coaxial adapters rated to 3 GHz are more expensive than those used for the NanoVNA. If you already have a NanoVNA you can use its standards and adapters, but don't expect great performance much past 1.5 GHz.



I haven't found a user review of the S-A-A-2 yet, so I can't say if it is delivered fully calibrated (50k - 3 GHz, 201 pts). If it is delivered not calibrated, or calibrated at less than its full range, then that makes the availability of an OSL kit even more important.



Looking forward to you receiving your V2 and providing a review to the group.



- Herb
Re: softwarwe

 

Don't forget, NanoVNA-Saver also runs natively on Mac OSX 10.12 and (presumably) all later versions. It runs great for me on 10.14 (but didn't work on 10.10 because PyQt5 wasn't compatible prior to 10.12).

-Larry/NE1S
Re: V2 Design #nanovna-v2

 

On Sun, Mar 22, 2020 at 09:28 AM, n2msqrp wrote:

Is there a developer approved site where we can purchase the NanoVNA-V2?
====================================

Mike,
I far as I know the HCXQS group in collaboration with OwOComm funded the development of the NanoVNA-V2. The HCXQS group is selling the NanoVNA-V2 at . Members of this group have reported that purchases from Tindie are filled fairly fast but are delayed in transit at the Shanghai postal point, most likely due to shipping delays caused by impact of the Coronavirus.

No matter where you order I wouldn't count on delivery until late April or early May.

- Herb
Re: V2 Design #nanovna-v2

 

Herb --- yes agree --- of course cal kit parts are the frame of reference for measurements (parts from an old HP 85033C cal kit here may suffice for starters) - hopefully the device gets here this year! -- Dave
Re: V2 Design #nanovna-v2

 

On Sun, Mar 22, 2020 at 07:42 AM, David Feldman wrote:

... Battery (size per the hcxqsgroup page) and pigtail cable (type per the hcxqsgroup page) were ordered separately from domestic suppliers ..
==============================================
Dave,
More important than battery and the cables are the OSL standards. A VNA without accurate standards is like a computer without software -- pretty to look at but limited in use. Since you purchased the S-A-A-2, I assume you intend on using it to 3 GHz. In that case, you should look into the purchase of a quality OSL kit rated to 3 GHz or better. Coaxial adapters rated to 3 GHz are more expensive than those used for the NanoVNA. If you already have a NanoVNA you can use its standards and adapters, but don't expect great performance much past 1.5 GHz.

I haven't found a user review of the S-A-A-2 yet, so I can't say if it is delivered fully calibrated (50k - 3 GHz, 201 pts). If it is delivered not calibrated, or calibrated at less than its full range, then that makes the availability of an OSL kit even more important.

Looking forward to you receiving your V2 and providing a review to the group.

- Herb
Re: V2 Design #nanovna-v2

 

Herb,

Is there a developer approved site where we can purchase the NanoVNA-V2?

Mike N2MS
Re: V2 Design #nanovna-v2

 

FYI I had ordered nanovna-v2 from Tindie 6 March 2020 for US delivery.

It appears the parcel was shipped via China Post. The tracking number provided yielded (via t.track17.net) most recent status of "your package has been handed over to the carrier", with last update 13 March 2020 (tracking history began on 8 March 2020 so hcxqsgroup dispatched the order quickly.)

I inquired of Tindie yesterday 21 March 2020 and their reply (this morning 22 March 2020) said "Hi, The typical delivery time is 30 days." and referred me back to t.track17.net URL for the parcel.

Battery (size per the hcxqsgroup page) and pigtail cable (type per the hcxqsgroup page) were ordered separately from domestic suppliers and have already arrived.

Dave
V2 Design #nanovna-v2

 

For those members who have an affinity to eBay, the V2 (S-A-A-2) has begin started showing up for sale, .

Good news: Another option for purchasing.
Bad news: Almost 3x higher in cost ($140 usd) than the same product on Tindie.

Without USB cable, SMA cables, OSL standards, and without a battery. Probably an "I don't think so" at that price.

- Herb
Re: edy555 release 0.7.1-20200321 #firmware

 

On Sun, Mar 22, 2020 at 05:06 AM, Jos Stevens wrote:

Does the? edy555 release work on -H4 ? I guess not.
=================================================
Jos,
Always remember that the -F and -H4 use different processors than the NanoVNA (-H), therefore; require different firmware. All firmware from edy555 is currently only for the NanoVNA (-H).

hugen is the only developer currently releasing firmware for the -H4, so unless the firmware comes from him and is designated as for the -H4, be wary.

- Herb
Re: edy555 release 0.7.1-20200321 #firmware

 

i Herb

Does the? edy555 release work on -H4 ? I guess not.

Jos

Op 21-3-2020 om 21:27 schreef hwalker:

On Sat, Mar 21, 2020 at 01:02 PM, Nbridgema wrote:

All I can say is that worked for me, without a dfu file.
==============================================
Quite right. A dfu file is only needed if you are using the STMicrolelectronic's DfuSeDemo utility to upgrade your NanoVNA (-H or -H4) on the Windows platform.

- Herb
Re: edy555 release 0.7.1-20200321 #firmware

 

On Sat, Mar 21, 2020 at 09:02 PM, Nbridgema wrote:


So I then tried using ch.bin, and that worked. The Terminal command was

<your_machine_name>:build <user_name>$ dfu-util -d 0483:* -a 0 -s
0x08000000:leave -D ch.bin
(where "build" is the folder

It gave a warning:
dfu-util: Invalid DFU suffix signature
dfu-util: A valid DFU suffix will be required in a future dfu-util release!!!
Opening DFU capable USB device...
You will then need to use the ST-LINK utility with the following memory parameters:
- Address: 0x08000000
- Size: 0x20000
- Data width: 8 bits
It seems that on MAC OSX, ST-Link is available with the terminal program, so the .bin file can be uploaded - no need to convert .dfu.
This is confirmed by the stlink install description on MAC OSX.
DfuSe Demo use .dfu is the Device Firmware Upgrade option, while STMicroelectronics using the Utility from the .bin file is an upgrade option. Both are products of STM.

73, Gyula HA3HZ

STLink on MAC OSX.png

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