Herb

A delta marker would have done the calculation for you.
It is currently not possible to place a marker on a stored trace. Is it something that should be possible

On Fri, Aug 7, 2020 at 01:07 AM, Erik Kaashoek wrote:

I have never done this FM deviation measurement but it is possible to see the carrier dip.

So I guess you can tune the depth of the modulation to get the first dip using a tone of 2kHz.

Any other views?

A quick estimate of FM deviation using a spectrum analyzer that my former lab used was: 1). Capture the unkeyed carrier [Display->Store Trace], 2). Key the carrier and measure the deviation between traces using markers.?

I just tried the procedure using the tinySA and it was surprising accurate.? Normally I would place each marker at a point on a horizontal graticule where both waveforms cross, but I couldn't figure out a way to place a marker on the stored waveform.? Fortunately the carrier was straight, up and down, where I needed to make my measurement so I could eyeball placement of marker 2.? Here are my results:

? 144MHz@10kHz-FM? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 144MHz@20kHz-FM??
? ?144.012 - 144.003 ~= 10kHz? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?144.023 - 144.003 = 20kHz
? ?? ? ? ? ???

? Pretty nifty for a $50 device.

- Herb

Sorry, I will check the additional battery check items and Maggie will send you a new tinySA as soon as possible. Please help check whether vbat displays 4.2V after removing the battery. If it displays 4.2V, it means the battery is faulty, if not, it means the charging IC is faulty.

WHen you switch on the tinySA, does it work?
If you unplug the USB does it switch of immediately or does it work for some time?

开云体育

The red led is still on after 12 hours of charging. Indicator says 3.3v and is 1/4 full

开云体育

red led is on. Battery indicates 3.2v and 1/4 scale after 12 hours of charging.?

The red led is just to the right of the USB connector as seen from the front/top
Is the red light on, off or blinking when connected to a charger?

Hello Ray, the red LED is on when charging, and the red LED is off when it is full. Is the battery not working now?

Alibaba
Can’t get into account. Tried to reset password, new password does not meet standards but standards are not listed.
Guess I will toss it and call it a bad day.

Contact the seller. They will tell you what to do.
If you did buy from one to the official stores of Hugen you will be surprised by his customer care!!!

Arrived a few days ago. Battery will not charge.
Ray
W8LYJ

Yes, ?8 is “handling charge” the rest is vat.

Steve L, waiting for mine.

My TinySA arrived today! yay
As soon as I got the notification about the release from Erik, I put in my order. Maggie reminded me that it's arrival was imminent, so I filled in a DHL form
to no-sign and put in my 'covid-special' box...
I started 'playing with it asap and found it easy to follow the menu system - even though I know very little about these creatures.
I put my NanoVNA-H with a 20db attenuator on to see the waveforms - amazing how the two worked together.
Thank You Erik, Hugen and Maggie for this great device!

Regards
Colin

I have never done this FM deviation measurement but it is possible to see the carrier dip.

Set transmitter to 144MHz
Set your test tone to 2kHz (1kHz is too low for the minimum RBW of a tinySA)
With a deviation of 5kHz (my signal generator does not let me do 4.8kHz deviation) you get the dip at the carrier frequency



The second bessel dip occurs when you have a deviation of 11kHz



So I guess you can tune the depth of the modulation to get the first dip using a tone of 2kHz.

Any other views?

Erik and the band of tinySA users,

The single largest use of my Motorola service monitor or my Bench Spectrum Analyzer was to measure and adjust the FM Transmitter Deviation.
Lately the initial setup of Packet Transceivers to have a consistent output transmission.

This week's shipment receipt of a pair of TinySA will get unboxed over the weekend.

I would appreciate any tips to measuring FM Transmitter Deviation with the TinySA.

..jpw J P Watters

Hi Dom, A bill from Royal Mail was through my door today, ?16.58.

73 Dave.

On Thu, Aug 6, 2020 at 05:50 AM, hwalker wrote:

I look forward to whatever future features and innovations you have in store for the tinySA.

Any user input is most welcome. Preferably features for the current tinySA (e.g.FW)

FWIIW I see this msg on my aliexpress order from last week today:

On Wed, Aug 5, 2020 at 11:13 PM, Erik Kaashoek wrote:

Hugen informed me is has send some to a long-term cooperative agent. As the quantity was small these are sold out.
The agent has ordered a large quantity and will sell on many platforms including ebay and amazon.
I will try to maintain a list of authorized sellers/stores on the wiki

? Thanks for the info Erik.? Yes, Amazon Prime is also listing the tinySA.? One of the nice things about your collaboration with hugen is that because of his experience producing the NanoVNA,? he has developed a network of of dealers that allow him to penetrate the market pretty quickly.? He also seems to understand which shipping options work best for speediest shipment and delivery.? His packaging is a level above most of his other competitors.

? The tinySA has exceeded the expectations of my ham club members who have received their units.? I look forward to whatever future features and innovations you have in store for the tinySA.

? - Herb

Hugen informed me is has send some to a long-term cooperative agent. As the quantity was small these are sold out.
The agent has ordered a large quantity and will sell on many platforms including ebay and amazon.
I will try to maintain a list of authorized sellers/stores on the wiki