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

I can't find any
Will ask Hugen

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Erik,
? Other suppliers of the tinySA have shown up on eBay and Taobao.? I was asked if they are legitimate or not.? I replied that they are probably tinySA's bought in bulk from hugen and being re-sold.? Do you know if that is correct or not?

- Herb??

John,
? Looking forward to reading your impressions at blogspot.com.? Three members of my ham club have also received their tinySA's.? All have expressed appreciation to me for letting them know it was available.

- Herb

Received mine today (Holland) Never been able to buy an SA, this little beauty makes me extremely happy After switching it on. Thanks for making this possible.?

Huub

Received mine in Houston today, 12 days after placing order.

--
John AE5X

On Wed, Aug 5, 2020 at 12:05 AM, Erik Kaashoek wrote:

On Tue, Aug 4, 2020 at 05:20 PM, hwalker wrote:

Prior to the version 1.0-49 FW update a level calibration on my v0.3 tinySA would set leveloffset low to '0' which gave me a measurement error of < 1dB across the board measured against an external signal source.? With v1.0-49 a level calibration is now setting leveloffset low to '1.7' and my measurements against an external signal source are off by about that amount.? I have to manually set 'leveloff low 0' to regain my <1dB accuracy.? This using the new correction table.

Herb,
Can you check if the same is happening when you manually calibrate using the 30MHz cal output, center = 30MHz and span=10MHz and then an ACTUAL POWER set to -25?
If that gives a good result can you manually calibrate using? the 30MHz cal output, center = 30MHz and span=60MHz and then an ACTUAL POWER set to -25?
I'm most interested in the difference in calibrating powerlevel using ACTUAL POWER using a span of 10MHz versus a span of 60MHz.

Erik,
? ?My calibrator signal level (-26.7dBm)?is low by 1.7dB? which explains the leveloffset low issue. If I enter CONFIG->EXPERT CONFIG->ACTUAL POWER: -26.7 ?then my leveloffset low value is '0' as expected.? I did not experience this issue prior to v1.0-49, at least not that I can recall.? I changed inter-connecting cables to verify that my cable was not at fault by 1.7dB.

30MHz@10MHz?Span.? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 30MHz@60MHz?Span.
? ??

In any event, manually entering the actual powered measured at 30MHz, using a 10MHz span, is a satisfactory alternative level calibration procedure -? if the 30MHz calibrator level differs from -25dBm by more than a dB or so.

- Herb

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On Tue, Aug 4, 2020 at 11:06 PM, DuWayne Schmidlkofer wrote:

Herb
I hope you don't mind, but i plan on using a couple of your pictures on my blog.? I received my TinySA today, and have been having some problems with my camera.? Your pictures of the packaging is much nicer than I was able to get.? This packaging is much nicer than I have found in similarly priced products of any type.

DuWayne,
? ? I'm glad you found the pictures useful.? Be my guest to use them as you wish.

- Herb

On Tue, Aug 4, 2020 at 05:20 PM, hwalker wrote:

Prior to the version 1.0-49 FW update a level calibration on my v0.3 tinySA would set leveloffset low to '0' which gave me a measurement error of < 1dB across the board measured against an external signal source.? With v1.0-49 a level calibration is now setting leveloffset low to '1.7' and my measurements against an external signal source are off by about that amount.? I have to manually set 'leveloff low 0' to regain my <1dB accuracy.? This using the new correction table.

Herb,
Can you check if the same is happening when you manually calibrate using the 30MHz cal output, center = 30MHz and span=10MHz and then an ACTUAL POWER set to -25?
If that gives a good result can you manually calibrate using? the 30MHz cal output, center = 30MHz and span=60MHz and then an ACTUAL POWER set to -25?
I'm most interested in the difference in calibrating powerlevel using ACTUAL POWER using a span of 10MHz versus a span of 60MHz.

Herb
I hope you don't mind, but i plan on using a couple of your pictures on my blog.? I received my TinySA today, and have been having some problems with my camera.? Your pictures of the packaging is much nicer than I was able to get.? This packaging is much nicer than I have found in similarly priced products of any type.
DuWayne KV4QB

Mine just arrived, looks great so far.? I can see where it will take some time to get familiar with all the features and settings.