开云体育

option to rotate screen 180 degrees: should be doable; I think the ILI9341 has a command to do that without flipping the data.

bluetooth: not yet, maybe V3 ;)

display size: base version will have a 2.8'' display. User can swap in a 3.2'' ILI9341 display (drop in replacement) or a 4'' ST7796S display (pending firmware support). We are likely going to offer a version with 4'' display, maybe a month or so after the release of the base version.

jog switch: it's already the same part number as the one used in the -F, just without the nipple installed. Using the jog switch is optional as all features can be accessed from the touch screen.

price: most likely similar to the -H, so around $60. I don't know where the $100 BOM cost rumor comes from but it's false, the BOM cost can't be anywhere near $100 if this is to retail for $60 ;) There aren't much development costs because OwOComm sponsored the initial R&D on condition that all designs be open sourced.

I've attached the uncalibrated load plot. The performance of the baluns deteriorate rapidly above 3GHz so this is going to be marketed as a 3GHz instrument rather than a 3.5GHz one. On this particular unit the nastiness starts at 3.4GHz.

Great news, Gabriel.
Would it be possible to have a serial interface option that you can select via an on-screen config command?
That way, end users could opt to use their own add-on serial to BT or serial to WiFi or serial to ?? interfaces.
Thanks,Larry

OK, thanks.

Many devices use pin 4 of the microUSB connector as a switching line (ex: cellphones use it to switch to OTG when pin 4 is grounded).
Maybe you could use that to route serial to the connector if pin 4 is pulled hi or low?? Just a thought.
Thanks
Larry

On Wed, Dec 18, 2019 at 09:54 AM, Gabriel Tenma White wrote:

…. price: most likely similar to the -H, so around $60. I don't know where the $100 BOM cost rumor comes from but it's false, the BOM cost can't be anywhere
near $100 if this is to retail for $60 ;) There aren't much development costs because OwOComm sponsored the initial R&D on condition that all designs be
open sourced. ….
============================================================================
Gabriel,
I keep forgetting that your OwOComm sponsored V2 design effort is a different branch than Hugen's , and he also wants to keep the BOM of his V2 build below US $100. Your target price of $60 for a 3 GHz VNA with performance specifications exceeding the NanoVNA-H is very aggressive. What kind of case packing are you considering that would accommodate using different size displays? The success of the NanoVNA-F indicates that packaging and display size are a primary motivator for a lot of buyers. Wish you much success.

- Herb

Any reason you could not give it an SPI interface? then you would only need
to break out 1 pin for CS which may be easier? IF you even need to you
could just make it so we pick "screen OR serial" that way with a jumper or
something. Since i feel like most serial/non usb applications would be
remote anyway
Tim Keller

On Wed, Dec 18, 2019 at 1:21 PM Gabriel Tenma White <
OwOwOwOwO123@...> wrote:

Would have done that but there are only two free GPIOs and looking at the
layout they are pretty much impossible to route out. I'll try to think of
something maybe involving the USB connector.

Is Hugen involved with this V2 product or is he doing a separate development?

BTW - Hugen's supplier Maggie King emailed me today stating that revision 3.4 of the NanoVNA-H is now available at her site.

On Wed, Dec 18, 2019 at 09:54 AM, Gabriel Tenma White wrote:

On this particular unit the nastiness starts at 3.4GHz.

Exceptional performance, especially taking the target price point into account. You all did a very good job.
I wish my home build 3GHz VNA would be that good

--
NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK

any plans on selling the boards without the screen?

How many sweep points? and how fast full-range single sweep?

The firmware can be configured for up to 201 points, but there are still a few minor UI glitches we need to fix before this can be advertised. Sweep rate is by default 100 points/s, and this is what the plots shown above are taken at, but this can be adjusted in code to trade off noise vs speed. However V2 always shows new data in realtime as the sweep progresses (I'll maybe post a video if my internet speed allows) rather than a screen update every full sweep, so in practice it feels faster. There is a caveat though which is that the first sweep after changing frequency limits is always slower, because it has to do various internal corrections (see firmware code for details). In USB mode this means it's not advisable to do "segmented sweep", but there isn't a need because up to 1024 frequency points are supported in USB mode. This is all mainly capped by device RAM. Firmware is at:

Without display user define sweep points useful. Raw data also interesting or/and better calibration model on instrument. Currently no way to define precision oslt model on nanova. Many times coaxial line not easy compensate. Bluetooth or better wifi interface will be very useful. Display not required. Strong case with tab to support cord on mount + battery useful and two port. Output is sine wave or square wave?

I have to agree with this, I have a NanoVNA-F and I use it a lot more than the smaller model purely because I can see it. I would be happy to pay extra for a bigger display and as a consequence a bigger battery. I do not know how many units you need to sell and at what profit to make any project viable but a 3GHz VNA 5 inch display would be worth $180-200. I think that you can sell several hundred units at that price point.

People with disposable income in this hobby tend to be older and tend to have failing eyesight. A big display is very important.

Regards

Conrad PA5Y

________________________________
From: [email protected] <[email protected]> on behalf of Dr. David Kirkby, Kirkby Microwave Ltd via Groups.Io <drkirkby@...>
Sent: 17 December 2019 23:43
To: nanovna-users <[email protected]>
Subject: Re: [nanovna-users] First PCB pictures of the V2

On Tue, 17 Dec 2019 at 20:45, hwalker <herbwalker2476@...> wrote:

On Tue, Dec 17, 2019 at 10:40 AM, Dale Parfitt wrote:

Thank you Herb, So much traffic, I missed the specs.
====================================================

Dale,
I'd like to add a correction regarding the display size:

Gabriel indicated in her previous message that a working proto-type is
already available using a 3.2" ILI9341 display. A 4" ST7796S display is
being evaluated as an option by menu-driven switchover. Her team will
make a decision about whether to offer two versions for sale.

I would also like to add my voice to the many that would want to purchase
this with a larger screen.

How does the larger screen you may or may note use compare with the 4.3" on
the NanoVNA-F? The 4.3" of the -F is more attractive than 4" for obvious
reasons, but how about pixel count, and other technical features about the
screen.

I don't know if I'm unusual, but for me, the screen is more important than
the pure performance, as great performance is no use if you can't see the
blinking thing. Of course, if you are going to use it in a lab, with a PC
interface, the screen is pretty irrelevant. But there seem to be enough
people wanting a decent screen. The 6.5" on my iPhone XS max would be nice.
Ouch, that phone was ?1250, so it's not a fair comparison! But seriously,
size matters. ?????

From some hobbyist market sales I've been involved with, at least in the U.S. the second psychological price barrier is $100 -- three digits tends to scare people off.? (The first barrier seems to be $25 or so; below that, it's thought of as an impulse purchase).? Personally, I'd think $80 or $90 would not be a problem given the extra value of the larger screen.

John

Gabriel. change of screen rotation is just a trivial edit of one line in the setup section of the code.

In my opinium, the on/off and the jog switch can better be swapped.

/g/nanovna-users/message/2148 Thats you are!
I encouraging&cheering for your contribution

Hi Gabriel,

Congrats to see working your product.

As I posted in the former message, I think that you should use a name such as V2 or Pro.
I propose that your product should be named as NanoVNA-G derived from your initial.

Again, I strongly say that you should use the name of V2.
I hope you think this issue seriously.
Regards,

@edy555

I've brought this issue to the team. It's going to be NanoVNA-B V2, if you don't object. I'm only an engineer on the development team (for OwOComm) and my name comes from a fictitious character who has no relation to this project ;)

I think that NanoVNA-B is okay.
You should not use V2 in its name. I would like to emphasize this again.
I hope that your team accepts this proposal.
Regards,

I'd also like to suggest being able to rotate the screen so that the SMA's and cables are not facing the user.

However having removed the jog wheel and converted my Nano to use small push buttons (see attached) with a positive tactile 'click', I definitely wouldn't recommend fitting a jog wheel in any way, shape or form.

Regards,

Martin - G8JNJ