Hi Erik,

The new version is a definite improvement.

Could I suggest that the graph frequency scale is shown along the bottom axis and the marker frequencies are shown along the top (swapped over).

Most of the time markers tend to be used to indicate amplitude peaks or perhaps -3dB down from peaks, so it's easier to read if the specific marker frequencies are shown at the top and the graticule calibration is shown at the bottom, as is the usual case with graphs.

Would it also be possible to add a peak hold to the graph function at some point please ? It saves having to watch the screen to capture occasional events.

Thanks again for all your hard work, it's very much appreciated.

Regards,

Martin

New tinySA-App release
Version v1.1.4.6

OneOfEleven has made many improvements in the nanoVNA-App and in this release I synchronized the tinySA-App with those improvements.
As there are so many changed/new functions I have not been able to test everything and due to some serious git struggles some tinySA specific functionality may have disappeared.
Do not delete your old tinySA-App but store it in a safe place before updating......

Hi Bob,
The app for windows is on this link page (exe file only).

It works well with my unit and it was easy to use?the markers facility via this app.
I don't know yet how to use the markers via the TinySA screen menu.
All the best
Al

On Sat, Oct 10, 2020 at 05:52 AM, OneOfEleven wrote:

Their should not be any "Add Marker-1" option in the mouse-right-click menu, I don't know where that has come from ?

Oops, typo. Should indeed be "Add marker"
and indeed, it works without aligning

Hi John,
Great feedback for the community - Thank you.
I did my first test this morning on my very advanced work bench (washing machine) and my waveform generator (a Siglent SDG 830). This low cost Siglent is capable to generate a modulated signal with a wave carrier - See picture.
I am using a 'capacitive' loop antenna (measured at ~160 pF with the 75ohms cable at 1 Mhz - old TV Yagi kit). It broadcasts the generator signal to the Tiny aerial supplied with the kit. The capacitive aerial is hanged above the?TinySA aerial on the washing machine. I know it sounds like a crazy test!
Note: I've tested the coax and the waveforme generator with the TinySA's aerial. As long you don't touch the coax with the aerial, the shield is doing the job.
The lowest transmit signal that I was able to broadcast with the Siglent is 30 mVpp (~21.2 mVrms). The TinySA is capable to pick up that modulated signal above the noise floor at ~-102dBm between my 10 and 20 Mhz test trial. I am sure I can zoom in but I got lost with the menu.
The frequency difference given between the Siglent and the TinySA is around +/- 1kHz and the yellow marker followed each incremental frequency increase from 10 MHz to 20 MHz within that tolerance. In my opinion, the TinySA works well.
At 14Mhz, the aerial impedance is ~ 71 ohms therefore the broadcast signal must be very low. I calculated it at ~ 6.33 microWatt but I might be wrong because you have the aerial lost and so on.? I am not a radio amateur yet.
All the best
Alain
PS: Don't forget your magnifier when you are working with the TinySA.

On Sat, Oct 10, 2020 at 01:42 PM, Erik Kaashoek wrote:

Move your mouse close to the peak you want the marker on till you see both the vertical and horizontal white lines appear.
Then right click "add marker"

You shouldn't need to do anything about aligning anything Erik, to add a marker anywhere on the graph all you need do is either double click inside the graph area (away from other markers) or right-mouse-click and select "Add Marker".

Their should not be any "Add Marker-1" option in the mouse-right-click menu, I don't know where that has come from ?

Can we look forward to a delta marker functionality soon? ;-)
--
John AE5X

Move your mouse close to the peak you want the marker on till you see both the vertical and horizontal white lines appear.
Then right click "add marker"

How do you add a marker in the app? If I right click I get a pop up menu where I can select "Add marker 1", but I can't seem to add a marker. I've tried left click, double click, shift click, ctrl click, alt click and no marker is set. All I do is mess up my range. I'm using version 1.0.7528.21513.
I haven't found any doc and the videos cover the TinySA well, but not the app.

I made some measurements of one of my QRP rigs over the past couple of days with an HP-8563A that we have at work, then made the same measurements at home with the tinySA. Very much impressed with the tinySA:



73,
--
John AE5X

On 2020-10-10, at 11:14, Alain <aggaslondon@...> wrote:

This is the reason of my post/enquiry as I was concerned to have an increase of current supply from ~2.5 W (USB2.0/5V/500mA) to ~4.5 W (USB3.0/5V/900mA).

I have a table that is 74 cm high and can carry 300 kg load.

If I put something on this table, it will be at 74 cm height above the floor, regardless of its weight (if it is not more than 300 kg).

If I put something on the table that is less than 300 kg (say, a pencil), that will not be magically crushed by a 300 kg weight just because the table can bear that. The table will just happily bear the lighter load.

74 cm = 5 V — that is the voltage you get from the power supply; the supply will do what it can to keep up this voltage, up to a current of 900 mA.
300 kg = 900 mA — that is the maximum current it can supply, but the supply doesn’t force that current, that’s just its rated load capacity.

Of course, this all applies to constant voltage (CV) power supplies.
All USB power supplies are constant voltage (5 V), as are most “regulated” supplies.
(I also have constant current (CC) power supplies; these are not useful as USB power supplies. Just as constant voltage power supplies have a maximum current they can supply, constant current power supplies have a maximum voltage, often called the “compliance voltage”. But you don’t have one of those; they are quite special animals. Lab power supplies are often CV up to a rated/set current, which they then keep like a CC power supply — irrelevant unless you exceed the set current.)

And then there are power supplies that are not properly regulated (like a table that sags when I put something on top), so the voltage/current curve is more complicated. Use regulated CV supplies only.
(Note that there are also bad power supplies that may not be on spec;
simply only ever use power supplies from reputable sources, if only for electrical safety.)

Grü?e, Carsten

The current drawn by the tinySA is 500mA max, or less if less is needed

Dear Gents,
I have attached a picture of the label of my TinySA. You can see that the current specification was (wrongly) labelled as "5V USB (500mA Max)".
This is the reason of my post/enquiry as I was concerned to have an increase of current supply from ~2.5 W (USB2.0/5V/500mA)?to ~4.5 W (USB3.0/5V/900mA).
Thank you Erik for this prompt clarification. In my opinion, it should be mentioned on the TinySA website if not.
All the best for now.
Alain

On Fri, Oct 9, 2020 at 01:45 PM, Alain wrote:

The specification for the power supply is 5V USB and 500mA Max.

The specification states the USB port or USB charger used should be able to supply minimum 500mA.
So any USB 2.0 or 3.x port will work and any modern charger (even the fast phone or tablet chargers) will work fine
There are USB chargers that can not supply 500mA (such as a USB charger intended for a low power device). There chargers may not be able to charge to tinySA.

I have used mine on a multitude of chargers and computers. On my laptops, the TinySA is hooked up via USB 3.0 with no problems.?
Ihave many USB power adapters in the house. Some capable of upwards of 4 amps, as well as a multitude of QC Capable USB chargers (5v,9v,12v). None of these chargers are of issue because of the way USB charger coding works. The device will not receive more current than what it tells the charger it needs. There are no USB chargers that will supply a higher voltage than 5v unless a capable device is attached (eg. Smart phone will tell USB charger "I can handle 9v @ 1.5amps") . Just don't use a cheap knockoff USB adapter and everything will be fine.

Rest assured there are proper battery charging ICs as well as a protection circuit on the little lipo battery that the TinySA uses. Both of which ensure proper charging and as well as protection from under and over charging.?


In other words, don't worry about the charging. The tinySA will be fine!

开云体育

Connecting the TinySA to a USB port in a PC is safe, either USB 2 or USB 3, because both supply 5 V to its USB connectors and it is not a mater of currents asit has been already explained.

The problem that can happen using an USB charger, i.e. a phone fast charger, is that they can supply as much as 7V? to the phone and there is an internal regulator on the phone that takes care of it.? So as a caution, don't use an USB charger for charging the TinySA battery, use a PC or a USB power supply specified for 5.0 V output (BTW most of them).

Regards,

Ignacio EB4APL

My six sense is telling me?that I should be fine with the 900mA USB3.0. However, I am worried that the internal battery socket may fail if the current charging the internal (lithium) battery has no internal current regulator. Everything inside is Tiny!
I've heard people having such troubles with their NanoVNA by using a USB power charger rated at 2 amps instead of the 1 A max as specified.
Just saying...
73 Alain

My six sense is telling me?that I should be fine with the 900mA USB3.0. However, I am worried that the internal battery socket may fail if the current charging the internal (lithium) battery has no internal current regulator. Everything inside is Tiny!
I've heard people having such troubles with their NanoVNA by using a USB power charger rated at 2 amps instead of the 1 A max as specified.
Just saying...
73 Alain

--

The specification for the power supply is 5V USB and 500mA Max.
I understand that I can only use a USB 2.0 port on the computer/laptop as USB 3.0 port is rated at 900mA.

Is there any report of TinySA failure(s) when the USB 3.0 port was used?

Thanks
Al