开云体育

Thanks Larry, looks like the links to the device and its photo did not made
it to the main post.

www.ebay.com/itm/RF-Sweep-Signal-Source-Generator-Board-35M-to-4-4G-STM32-TFT-Touch-LCD-ecl/382977928545

the screen that broke is the generator one.. If the links would have made
it it would have been more obvious.. sorry..

In case the link dont do it again.. the generator can be found on ebay
under this description:

RF Sweep Signal Source Generator Board 35M to 4.4G + STM32 TFT Touch LCD ecl

hope this help

On Thu, Jan 23, 2020 at 08:22 AM, hwalker wrote:

Steve,
I believe no one has replied to the original post because it is hard to find members with both devices. NanoVNA-F owners are pretty satisfied with their devices and the same will go for NanoVNA-H4 owners.

Both devices are based on edy555's original design but are implemented differently:

The NanoVNA-F has a 4.3" Display with better resolution than the NanoVNA-H4. It is packaged in a metal case and has a massive 5000 maH battery. Updates to the firmware are via a built-in virtual disk that shows up as a drive when connected to a pc. The frequency range is 50 kHz - 1 GHz.

The NanoVNA-H4 has a 4" Display. It is packaged in an ABS case and has a 1950mAh battery. Updates to the firmware are made using a software program via a USB connected pc. The frequency range is 10 kHz to 1.5 GHz.

The NanoVNA-F is about twice the cost of the NanoVNA-H4. My ham club has both devices and either is a great choice. I own a 2.8" NanoVNA-H and wanted a unit with a larger display. My personal decision was to purchase the NanoVNA-H4.

When hardware specifications are fairly close, support becomes the deciding factor for me. This support group and other forums around the internet are hands down better than any you will find for the NanoVNA-F. hugen has available numerous other developers (i.e. edy555, QRP, etc.) that contribute outstanding firmware functionality at a rapid clip. Firmware releases for the NanoVNA-F are historically slow and sometimes are rather mundane, such as allow you to add your call sign to the boot-up screen instead of something more substantial like the TDR functionality of the NanoVNA-H4.

Again, both units are based on the same design so there is a lot of overlap in their performance specifications. This user support group, the independent firmware developers, and the increased frequency range specifications were my reasons for deciding on the NanoVNA-H4.

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

One thing I forgot to mention is that if you decide to purchase the NanoVNA-F be aware that there are currently a lot of clones out there. These clones are in an open case design without the large battery and are inferior to both the original NanoVNA-F and the NanoVNA-H4. If you purchase one of these clones You will like neither receive, nor should expect, any support from the NanoVNA-F user group. The group's owner is the developer of the NanoVNA-F and does not take kindly to the cloned devices.

If price is your limiting factor, you are best served purchasing the NanoVNA-H4 instead of the NanoVNA-F knock-offs.

- Herb

On Thu, Jan 23, 2020 at 07:21 AM, Steven Greenfield AE7HD wrote:

" ... difference between nanoVNA-F and nanoVNA-H4..."

I am also interested in the difference.
===================================================================

Steve,
I believe no one has replied to the original post because it is hard to find members with both devices. NanoVNA-F owners are pretty satisfied with their devices and the same will go for NanoVNA-H4 owners.

Both devices are based on edy555's original design but are implemented differently:

The NanoVNA-F has a 4.3" Display with better resolution than the NanoVNA-H4. It is packaged in a metal case and has a massive 5000 maH battery. Updates to the firmware are via a built-in virtual disk that shows up as a drive when connected to a pc. The frequency range is 50 kHz - 1 GHz.

The NanoVNA-H4 has a 4" Display. It is packaged in an ABS case and has a 1950mAh battery. Updates to the firmware are made using a software program via a USB connected pc. The frequency range is 10 kHz to 1.5 GHz.

The NanoVNA-F is about twice the cost of the NanoVNA-H4. My ham club has both devices and either is a great choice. I own a 2.8" NanoVNA-H and wanted a unit with a larger display. My personal decision was to purchase the NanoVNA-H4.

When hardware specifications are fairly close, support becomes the deciding factor for me. This support group and other forums around the internet are hands down better than any you will find for the NanoVNA-F. hugen has available numerous other developers (i.e. edy555, QRP, etc.) that contribute outstanding firmware functionality at a rapid clip. Firmware releases for the NanoVNA-F are historically slow and sometimes are rather mundane, such as allow you to add your call sign to the boot-up screen instead of something more substantial like the TDR functionality of the NanoVNA-H4.

Again, both units are based on the same design so there is a lot of overlap in their performance specifications. This user support group, the independent firmware developers, and the increased frequency range specifications were my reasons for deciding on the NanoVNA-H4.

Hope that helps.

- Herb

The bit of plastic is nothing more than a handle to remove the screen protector.
Battery charging is indicated by flashing blue LED.? If it flashes, battery is charging.? If steady on, fully charged.? But the LED doesn't respond immediately; it takes a minute or so.
You can check the battery connector; perhaps it worked loose.? Measure on the PCB to see if battery voltage reaches the rest of the circuit.
I have battery issues also.? Seems to be a common thing.
Bob

I subscribe to 'The Engineer's Garage' newsletter and thought folks here might be interested in this article.
It's mostly for surface mount devices but is still useful info.



Enjoy,
Larry

What touchscreen is broken - the generator or the Nanovna?
You have not indicated the model of the generator, the size of its screen, etc.

I bougt this frequency generator a year ago and when I received it I tested it, found that there was a software to use it by computer and put it aside as I had to place to make a test bench as my basement was geing demolished. I finally had time to reassemble a mockup test bench to start using the Nanovan and the frequency generator in combinaison with a few other tool just to find that the touch sreen of the generator cracked. And cant seem to find the software anymore..

Since the screen is unseable I am thinking that the control software would do a nice job.

Now If I cant find the software I would need a replacement screen. But there is no specific information on the screen itself..

Anyone can point me in the good direction to search.

I hope that the group wisdom will help me pull this out..

Thanks
Pierre
VE2PF

there are significant gaps in Amateur Radio offerings for the iPhone

iOS does not support virtual COM port devices by USB, but does via BlueTooth LE..

David,

Even though you don't use Android, you could just buy an android tablet and dedicate it to just use the NanoVNA. You could even mount the two together in an enclosure so it would then be self-contained.

I know that's not what you're after, but it was an idea in case somebody is thinking about it.


Trystan

On Wed, Jan 22, 2020 at 12:17 AM, Oristo wrote:

You may be able to capture screens by modifying
Specifically, replace 320 and 240 at lines 46 and 73 with pixel dimensions of NanoVNA-H4 display,
and COM3 at line 11.
================================================================================

Hi Oristo,
Just wanted to let you know I finally got back to modifying your screen capture script and with your suggested changes it works with the NanoVNA-H4.

Changes:

change 320 and 240 to 320 and 480 at lines 46 and 73 Comment: pixel dimensions of NanoVNA-H4 display are 320 by 480
change x value to: x = struct.unpack(">153600H", b) Comment: Number of half bytes
change img value to: img = Image.frombuffer('RGBA', (480, 320), arr, 'raw', 'RGBA', 0, 1) Comment: Converted image

and COM3 at line 11 to appropriate comport

Thanks for making the standalone screen capture script publicly available. A nod to cho45 and Rune for pieces of the code that were borrowed from them.

- Herb

difference between nanoVNA-F and nanoVNA-H4

I am also interested in the difference.

--
Steve Greenfield AE7HD

Received my NanoVNA-H4 today. Looks like a nice device.

I have noticed a problem and just wondering if I am alone...Setting the center frequency to anything above 1Ghz, everything freezes and the only way to do anything turn off and back on again. The results are the same for both the original firmware and the latest Jan 18, 2020 version. Seems ok if start and stop frequencies are selected.
Keith
==========================================================

Hi Keith,
Check my review in message number #10012 and Merle W reply in #10024. Merle's confirmation was enough for me to report an issue to hugen on his GitHub page ( ). I also included the quality issue that some members are experiencing with the case opening for the USB-C port.

Setting start and stop frequencies, instead of center frequency and span, as you already found out works fine above 1 GHz. Given hugen's history I know he will quickly release a firmware fix, but this being the Chinese New Year will likely delay his response.

Thanks for confirming the issue and also for confirming that updating to the latest firmware version doesn't correct it.

- Herb

On Thu, 23 Jan 2020 at 00:26, n2msqrp <mstangelo@...> wrote:

The ICOM IC-7300 has a 4 inch touchscreen display had has been a big
success so I think lots of hams and experimenters will find it sufficient.
Have you looked at the Android app?

Mike N2MS

I am interested mainly in using the unit self-contained, with no app.

I don’t use Android - I used to, but found too many incompatible problems
for me. I switched to an iPhone XS max, which is quite an expensive phone
with a 6.5” screen.

However, fairly low-priced phones are available with 5.5” screens.

Dave

--

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

Go back and check your purchae description.

Very many NanoVNAs particularly from China are offered sans battery because of customs and air mail issues with shipping Lithium batteries.

I bet you have one of these.

You can install a small rechargeable 3.3v battery of the sort intended for Bluetooth headsets. Your NanoVNA circuit board has pads or header pins for this installation, as well as charge control circuitry.

Look around or search in this group, you should find many examples of people posting exact solutions and model numbers for battery installation.

73;
Bob KV4PC

Regarding the suggested phone, the price point was kind of a jolt to me so I looked it up, but when I checked the link, the Shipping & Handling was actually more then the phone. Wow - deceptive advertising!

A bit off topic, but my ARES group has folk interested in cheap Android devices because their every day phone is Apple. Say what you will about the relative merits of different phone hardware, but there are significant gaps in Amateur Radio offerings for the iPhone.

Coming back to topic, Many have chosen the 10" Amazon Fire tablet. Amazon Fire tablets seem to go on clearance sale with fair regularity for around USD $45 via Woot.com. There is a widely documented hack to open up FireOS as a plain vanilla Android by installing Google Play Store. I cant answer the suitability question for this particular application (OS versions etc) but it might be worth a look.

73;
Bob KV4PC

Thanks for the link Larry.

Jos

Op 22-1-2020 om 22:08 schreef Larry Rothman:

On 1/23/2020 6:17 AM, Christopher Pettitt via Groups.Io wrote:

Just bought a NanoVNA. Powers up fine from the USB port on switch on and charging led flashes and ON led illuminates. After charging unit wont power up with USB lead disconnected as if battery not charged. I notice a bit of film sticking out on top left hand corner of unit. Sort of thing you would pull on to bring a battery into circuit but this is quite firmly affixed to the unit. Anyone know of its purpose and can any help on why battery not charging.
Thanks
Chris G0EYO

The little tab is there so you can remove the plastic protective film on the display after removing the front cover.

Eric WA3UYI

Received my NanoVNA-H4 today. Looks like a nice device.

I have noticed a problem and just wondering if I am alone...Setting the center frequency to anything above 1Ghz, everything freezes and the only way to do anything turn off and back on again. The results are the same for both the original firmware and the latest Jan 18, 2020 version. Seems ok if start and stop frequencies are selected.
Keith

I've done that on more than one occasion
==========================================

Hi Herb,

That comes with age, i'm very old, Hi.
Abt the menu, there are several more like under "Marker" there are extra items with their own submenus, maby I missed some, who knows.

Jos

Op 22-1-2020 om 21:59 schreef hwalker:

Thanks Herb. This is a lot of valuable information. I will check Alibaba and can wait until they come back from New Years.

Tom