So with all the various places like Amazon & ebay etc..
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I see antenuators in Amazon for cheap compared to some other name brand ones. Yet some have good reviews. So do you get what you pay for or are some of these cheaper ones being sold as new any count?
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One of my main interest is being able to measure 5 watt HTs to 50 watt mobiles.?
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I'd hate to get something that's advertised as one thing..then use it to find out it's junk & possibly blow up the tinysa.?
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Re: Zero span modus - Possibility of measuring the pulse frequency and hear the sound of a demodulated RF signal
As soon as you activate LISTEN the scanning stops and zero span mode is selected at the frequency of the marker. The audio output is the linear with the signal level inside the active resolution bandwidth, e.g. AM demodulated, with maximum audio frequency of about 12 kHz.
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--
Designer of the tinySA
For more info go to
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Zero span modus - Possibility of measuring the pulse frequency and hear the sound of a demodulated RF signal
Hello, I am thinking of buying tinySA Ultra Spektrumanalysator, especially because it has a zero span modus function.
I studied decriptions, videos and posts in this forum, but could not find an definite answer to my questions to that:
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Is it possible in zero span modus
to measure (or calculate / visible count) the pulse frequency of a RF signal and hear the sound of a demodulated RF signal ?
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Example1: WLAN/WIFI at 2.400 MHz. Is ist possible > to measure/see/calculate the pulse signal of 10 Hz? > and to hear the typical WIFi signal sound ?
Example2: DAB-T (digital radio) at e.g. 208 MHz (in Austria). Is ist possible > to measure/see/calculate the pulse signal of 10,42 Hz > and to hear the typical DAB-T signal sound ?
Note: I do not want to hear radio broadcasting but listen to the pulse signal.
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It would be very fine, if you could help me further - thank you.
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Yes it does have a place where you can put in external gain to account for the attenuation or amplification for that matter. The ultra is a beautiful device as you will find out if you treat it properly.
Dave
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QUOTE:? You're going to spend a lot on any attenuator that can handle 50 watts! Good luck!
Not necessarily.? Thick film power resistors meant for RF applications are not that expensive.? And they are designed for microstrip.? Build your own for less than $100.?
Dave - W?LEV
Here is a calculator you will find useful...
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I like my peak signals between -30 and -40 dBm. In general more attenuation than you think necessary produces the best signals. I use a total of 70-80dB attenuation testing 1-5 Watt direct inputs.?
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You're going to spend a lot on any attenuator that can handle 50 watts! Good luck!
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Hi Bruce,
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I use a large wattage attenuator followed by a lower wattage step attenuator. ?The first is sized for the max power I plant to test (either 50 or 100 watt, 40 or 50 dB). ?This allows me to adjust the level for best accuracy and to validate that the SA is not suffering from signal compression.?
You will most likely spend more on the attenuators than the tinySA if you are going to measure anything over 10 watts.?
example of 2 watt step attenuator:
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I use one like this after a 100 watt 50 dB fixed attenuator?
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73
Evan
AC9TU
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Here is a calculator you will find useful...
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I like my peak signals between -30 and -40 dBm. In general more attenuation than you think necessary produces the best signals. I use a total of 70-80dB attenuation testing 1-5 Watt direct inputs.?
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You're going to spend a lot on any attenuator that can handle 50 watts! Good luck!
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I have a tinysa ultra on order. So just trying to plan ahead & figured I'd need an antenuator to make sure I didn't blow it up when transmitting into it making measurements. I just didn't know if it has settings to tell it what size antenuator is in front of the transmitter being tested or not. I know there's charts for db to watts. But trying to find a one size fits all solution was the initial thought here.
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As others have said have an attenuation /power table close at hand. And think twice before pressing PTT
As the tiny SAultra reportedly measures best around the -20 to -30 dBm input range I have a large high power 40dB attenuator and a handful of smaller (1 ,2, 5, 10, 20) attenuators for use on the low power end of the big attenuator to get the Tiny SA working in its best range for fundamental and harmonic display?
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TinySA Ultra says max 4mw signal input. If I buy a 50watt 50db antenuator & use it for 5 to 50 watts in. Will the tinySA still read the lower wattage input thu that? Or will the antenuator just kill all the signal & be over kill? I ask because I want to be able to measure handhelds & mobile radios that do 5 to 50 watts.?
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Re: 5.8GHz wideband video signal measurements
Hi Hai,
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RF signal sent from source/point A1.
At one of destinations(e.g. B1) RF signal received.
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RF signal sent from source/point B1.
At one of destinations(e.g. A1) RF signal received.
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Directional antenna (point C1/ connected to tinySA Ultra) is directed to specific direction ==> that antenna observe signals which are mostly coming from that direction.
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Is it Triangle form of positions A1 B1 C1? Which type of antenna are used at point A1 and point B1?
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That is all I can reply to you, for other explanation you should ask someone else (or someone who has HW visible in mentioned YouTube video).
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Regards,
Toni
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On Fri, Oct 11, 2024 at 06:51 AM, Erik Kaashoek wrote:
Any old stereo earbuds or headset can be plugged in directly.
Do NOT use mono phones as these will short the output
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Thanks Erik.
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I just found another pair of stereo earbuds that now work with
my Ultra.
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I must have reached my previous conclusion whilst using some
"dud buds" ;-)
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73 de Andy
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Re: TinySA or ULTRA Antennas
for me it was clear from the very beginning that he meant "1/32 wave length" without any need for further discussions.
Thats what Erik wrote: "a positive understanding of the question" - would be helpful.
But people ...
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Re: Is the TinySA Ultra capable of measuring short radar pulses?
When waiting for a trigger, the tinySA captures the incoming samples at maximum speed in a raw circular buffer.
Once the trigger condition is satisfied the raw samples are converted to requested unit and displayed.
So to capture a short pulse in zero span mode, set a level trigger just above the noise floor.
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Designer of the tinySA
For more info go to
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Re: Is the TinySA Ultra capable of measuring short radar pulses?
If you invoke "Max Hold", you will eventually catch a full radar pulse.?
Dave - W?LEV
I'm curious what radar type this is. You mention a power of +5dBm...is this an attenuated sample pulse on the radar transmitter's cabinet? If so, could it be an ASR-9?
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73,
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John AE5X
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Re: Is the TinySA Ultra capable of measuring short radar pulses?
I'm curious what radar type this is. You mention a power of +5dBm...is this an attenuated sample pulse on the radar transmitter's cabinet? If so, could it be an ASR-9?
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73,
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John AE5X
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Re: Is the TinySA Ultra capable of measuring short radar pulses?
Thanks Erik,
I tried adding an attenuator on the off chance that the AGC might be clipping but it had no effect.
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New thought ... Is there a way to tell the tinySA to plot the raw samples (in zero span) instead of trying to process them??
Can you create a "Sample Capture" buffer that would store raw samples when triggered and plot after it fills?
Can the buffer be large enough to capture 50us? Or better yet, 2ms? Selectable #points to trade resolution for time?
And can it be configured to capture samples 5 us prior to the trigger?
Extra credit: Could the sample capture buffer be made available for download?
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Re: TinySA or ULTRA Antennas
Thanks, Jim.? I shall try....
Dave - W?LEV
Keep on 'splaining Dave. I enjoy reading them,
On Thu, 10 Oct 2024 19:03:27 +0000
"W0LEV via " <davearea51a=gmail.com@groups.io> wrote:
> I'll stick with my "longer"
> explanations in an effort to help others in expanding their knowledge.
--
73
-Jim
NU0C
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Re: TinySA or ULTRA Antennas
Good morning Dave,
I certainly find your detailed explanations extremely useful, please do not stop, and the more math the better? 
73, Julio VE3FH
On Thursday, October 10, 2024 at 03:03:53 p.m. EDT, W0LEV <davearea51a@...> wrote:
Eric, I have just been "criticised" (yes, this afternoon) on another group for long posts due to EXPLAINING the reason(s) behind my answer(s).? Just supplying the answer teaches nothing.? The reason behind the answer teaches a bit of engineering and possibly physics.? I'll stick with my "longer" explanations in an effort to help others in expanding their knowledge.? Just me.........
Dave - W?LEV?
Dave,
It would help if you focus on helping and base your replies on a positive understanding of the question.
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Suggestions and discussions about a good antenna for a specific application is welcome in this group.
But please do not stear the discussion away from tinySA related contant
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If you think someone is making a wrong statement it would be appreciated if you ask clarification questions, just in case you misunderstood something
--
Designer of the tinySA
For more info go to
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Re: Just to let you all know how happy I'm with my TinySA Ultra.
It needs to be said.? Not only has Erik produced a great device, but he continues to provide superior after market support (i.e. this page and firmware updates).? I can't tell you how many times I've bought equipment with $ required for follow on support and that was IF support was available.
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Many thanks Erik,? ?
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Andy
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N4FOX
Dave
Bruce Akhurst
Julio VE3FH