Re: New FW release: Added frequency grid indicator
On Wed, Sep 16, 2020 at 08:36 AM, Erik Kaashoek wrote:
On Wed, Sep 16, 2020 at 08:11 AM, hwalker wrote:
Maybe as Igor suggested the behavior after exiting the 'measure' menu should be to return to the previous user set-up.
This can be implemented but you will also lose any change in setting you did after starting with the measurement so that is not perfect.?
The other alternative is to only do a limited deactivation of the measure setup. Which still may be difficult to understand.
How do other SA deal with this?
Come to think of it after completing automated measurements on a HP8568 I had to push the <instr preset> button to return to normal operations.? That is actually pretty much what you are doing now.? I also stored my settings in a register on the HP8568 prior to running an automated measurement so that I could recall them. Probably the primary issue was lack of the 'back' button for exiting the measure menu. ?-Herb
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in your first sentence about keeping it 10 dbm maximum ..is it minus 10 dbm or a normal 10 dbm which is 10 milli watts thanks
On Wed, 16 Sep 2020, 16:11 Erik Kaashoek, < erik@...> wrote: On Wed, Sep 16, 2020 at 07:14 AM, Karl Heinz Kremer - K5KHK wrote:
It lists the maximum input power as 10dBm - anything more and you will likely fry it. For a "good" reading, I try to keep the input signal below -30dBm
This is with 0dB internal attenuation. If you increase attenuation these numbers can go up with the attenuation but do not fry the internal attenuator.?
With 30dB attenuation the tinySA will survive a +30dBm signal for a couple of seconds.?
With attenuation on automatic you are perfectly safe and you can expect good measurements of you stay below +5dBm
But to give the attenuation some spare I suggest to always stay below 0dBm at the input. This will allow you to use the internal attenuation most effective
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I'm a bit too lazy to pull out the soldering iron, so I'll ask:? Will the SA firmware run correctly if it doesn't see the display and touch input?? I'm thinking about flying one under a hex-copter and every gram counts.
Thanks!
Brent AB1LF
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Re: New FW release: Added frequency grid indicator
On Wed, Sep 16, 2020 at 08:11 AM, hwalker wrote:
Maybe as Igor suggested the behavior after exiting the 'measure' menu should be to return to the previous user set-up.
This can be implemented but you will also lose any change in setting you did after starting with the measurement so that is not perfect.? The other alternative is to only do a limited deactivation of the measure setup. Which still may be difficult to understand. How do other SA deal with this?
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Re: Official or Unofficial sellers on Amazon ?
On Wed, Sep 16, 2020 at 03:06 PM, Erik Kaashoek wrote:
An "official" reseller is expected to start on amazon, ebay and others, but I have no info yet which store name they will use
Hi Erik, I thought that was the case, but I didn't want to suggest an 'unofficial' suppler to others who were interested in buying one, as the development team(s) would possibly suffer as a result. Regards, Martin
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Re: Official or Unofficial sellers on Amazon ?
I have a few TinySAs from Maggie's Alibaba store that I can ship USPS Priority Mail. Contact me off-list if you are interested.
Mark AC9VC
On Wed, Sep 16, 2020 at 10:06 AM Erik Kaashoek < erik@...> wrote: An "official" reseller is expected to start on amazon, ebay and others, but I have no info yet which store name they will use
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Re: New FW release: Added frequency grid indicator
Indeed!
I added too much measure menu options so the back key is no longer visible
Will be corrected in next FW
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Re: New FW release: Added frequency grid indicator
On Wed, Sep 16, 2020 at 07:01 AM, Igor Jobim wrote:
Erik.
I have the frequency set to start 0 and stop 200Mhz.
If I select "measure" incorrectly, any of the available options will not allow me to return without disturbing the setup.
Even the "off" option returns the setup as default (0 - 350Mhz).
v1.0.86
Erik, ? Igor is correct.? If you accidently select the measure menu there is no way to back out of it without losing your settings.? There should either be a 'back' button (intuitive) or selecting the 'OFF' button should act as a 'back' button (not as intuitive) that sends you up one menu level without loosing your settings. ? I usually store my current set-up in one of the four store locations before using the measure menu so that I can re-load it after a 'measure' operation, since I know exiting the 'measure' menu defaults to start-up settings.? Maybe as Igor suggested the behavior after exiting the 'measure' menu should be to return to the previous user set-up. - Herb
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On Wed, Sep 16, 2020 at 07:14 AM, Karl Heinz Kremer - K5KHK wrote:
It lists the maximum input power as 10dBm - anything more and you will likely fry it. For a "good" reading, I try to keep the input signal below -30dBm
This is with 0dB internal attenuation. If you increase attenuation these numbers can go up with the attenuation but do not fry the internal attenuator.? With 30dB attenuation the tinySA will survive a +30dBm signal for a couple of seconds.? With attenuation on automatic you are perfectly safe and you can expect good measurements of you stay below +5dBm But to give the attenuation some spare I suggest to always stay below 0dBm at the input. This will allow you to use the internal attenuation most effective
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thanks for the reply i found on the main site that minus 30 dbm is reasonable is preferrably below ..but it does say for a short period of time 20 dbm will be ok useing the low band of the sa..once again thanks for the info nice little annalyzer for the price..
On Wed, Sep 16, 2020 at 06:28 AM, Scott hunter wrote:
"with an external ittenuator what is the maximum input the spectrum annalyzer would handle 1dbm or 2 dbm or even lower any chance could u give me a accurate reading"
? ?Scott that's kind of a loaded question because it depends on the level of the signal you are measuring and the attenuator you are using.? See this page for maximum input ratings for both the LOW and HIGH inputs,??.? For best measurement accuracy Erik recommends that you choose an external attenuator that reduces your signal to -20dBm on the low port and -30dBm on the high port.? Use the LEVEL->EXTERNAL AMP setting to correct for the external attenuator.
"..also did u design this spectrum annalyzer?thanks for replying .."
? Erik is the proud designer of the tinySA and knows it backwards and forward.? He also maintains the firmware and the tinySA.exe software.? That is why he is able to respond so quickly to user input.? The tinySA is a result of almost a year of design work that originally started on the? Amatuer Radio Homebrew Test Equipment group.
- Herb
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Re: Official or Unofficial sellers on Amazon ?
An "official" reseller is expected to start on amazon, ebay and others, but I have no info yet which store name they will use
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Official or Unofficial sellers on Amazon ?
Hi All,
These have been listed on Amazon UK.
Sold by?Elikliv-EU and?
Are these a new 'official' supplier or simply a reseller ?
Regards,
Martin
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Re: Thank you! And a couple of questions on PC connectivity and upgrade
On Wed, Sep 16, 2020 at 06:36 AM, Ham Radio wrote:
Thanks Herb. ?A bit confusing for the first time user.
I just learned that you can use a serial terminal to connect with TinySA. ?Not sure if you need to be in regular mode ?or ?DFU mode to do that function and what speed to set the COMM port. ?
The PC Control description on TinySA.org needs to be expanded a bit more to describe the serial communication feature and perhaps, ?a link to the list of shell commands.
Bernie, ? A lot of tinySA users have prior familiarity with the NanoVNA which uses the same DFU upgrade procedure.? The DFU mode can only be used for upgrading.? To use the tinySA from a serial terminal you have to exit from the DFU mode and return to normal USB mode.? USB always transfers at the fastest speed rated for the selected port so speed settings in the serial terminal are not applicable. ?To get a list of the available shell commands just type 'help' from the serial terminal. - Herb
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On Wed, Sep 16, 2020 at 06:28 AM, Scott hunter wrote:
"with an external ittenuator what is the maximum input the spectrum annalyzer would handle 1dbm or 2 dbm or even lower any chance could u give me a accurate reading"
? ?Scott that's kind of a loaded question because it depends on the level of the signal you are measuring and the attenuator you are using.? See this page for maximum input ratings for both the LOW and HIGH inputs,??.? For best measurement accuracy Erik recommends that you choose an external attenuator that reduces your signal to -20dBm on the low port and -30dBm on the high port.? Use the LEVEL->EXTERNAL AMP setting to correct for the external attenuator.
"..also did u design this spectrum annalyzer?thanks for replying .."
? Erik is the proud designer of the tinySA and knows it backwards and forward.? He also maintains the firmware and the tinySA.exe software.? That is why he is able to respond so quickly to user input.? The tinySA is a result of almost a year of design work that originally started on the? Amatuer Radio Homebrew Test Equipment group.
- Herb
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Scott, you can find the specification of the TinySA here:?
It lists the maximum input power as 10dBm - anything more and you will likely fry it. For a "good" reading, I try to keep the input signal below -30dBm.?
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Re: New FW release: Added frequency grid indicator
Erik.
I have the frequency set to start 0 and stop 200Mhz.
If I select "measure" incorrectly, any of the available options will not allow me to return without disturbing the setup.
Even the "off" option returns the setup as default (0 - 350Mhz).
v1.0.86
Thank you for your work.
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Re: Thank you! And a couple of questions on PC connectivity and upgrade
Thanks Herb. ?A bit confusing for the first time user.
I just learned that you can use a serial terminal to connect with TinySA. ?Not sure if you need to be in regular mode ?or ?DFU mode to do that function and what speed to set the COMM port. ?
The PC Control description on TinySA.org needs to be expanded a bit more to describe the serial communication feature and perhaps, ?a link to the list of shell commands.
--
73, Bernie, VE3FWF
(most typos in this message were generated by highly sophisticated auto-correction software)
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with an external ittenuator what is the maximum input the spectrum annalyzer would handle 1dbm or 2 dbm or even lower any chance could u give me a accurate reading ..also did u design this spectrum annalyzer?thanks for replying ..
On Wed, 16 Sep 2020, 12:51 Erik Kaashoek, < erik@...> wrote: The input power of the fundamental should be as low as possible to avoid the tinySA generating internal harmonics. But the fundamental should also be so strong the harmonics do not disappear into the noise.
In this example:?
you see that keeping the fundamental just below -25dBm (with 0dB attenuation, increase attenuation if you increase the level of the fundamental) gives the largest measurement range of observing harmonics.
The first example in this video:?
shows the measurement of a signal with harmonics where the fundamental is at -25dBm
A practical example of measuring the harmonics from an actual transmitter can be found here:?
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Re: Noise factor measurement: Can someone with knowledge review this wiki page?
The noise measurement page is updated
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The input power of the fundamental should be as low as possible to avoid the tinySA generating internal harmonics. But the fundamental should also be so strong the harmonics do not disappear into the noise.
In this example:?
you see that keeping the fundamental just below -25dBm (with 0dB attenuation, increase attenuation if you increase the level of the fundamental) gives the largest measurement range of observing harmonics.
The first example in this video:?
shows the measurement of a signal with harmonics where the fundamental is at -25dBm
A practical example of measuring the harmonics from an actual transmitter can be found here:?
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Brent DeWitt
Igor - PY3IG
Ham Radio