Re: Having to replace internal LiPo battery...
The battery power does not matter, you can use any 3.7V LiPo battery as the charger will limit the load current and never overload a LiPo. Make sure there is a protection circuit on the battery to prevent fatal discharging. --
For more info on the tinySA go to https://tinysa.org/wiki/
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Precision to measure frequency
How accurate is it to measure frequency using TinySA? It's possible to use to set reference oscillator from a ham radio rig?
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Precision to measure frequency
How accurate is it to measure frequency using TinySA? It's possible to use to set reference oscillator from a ham radio rig?
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Re: Having to replace internal LiPo battery...
I had figured out the sizes 6mm height x 25mm wide x 40mm long 3.7v@650 mAh capacity. It is next to impossible to find said size with the same JST plug to fit TinySA on-board connector. I am now thinking of using the original JST wire/plug, from old battery, to fit a new 1000mAh over sized battery to mount on back shell to extend run time. Again, thank you for your reply.
On Thursday, April 14, 2022, 08:09:30 AM CDT, <k_severin@...> wrote:
The battery is of the type: 602540, 3.7V, 650mAh
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Re: Having to replace internal LiPo battery...
Thank you for your time.
On Thursday, April 14, 2022, 08:02:21 AM CDT, <k_severin@...> wrote:
Good question...
Pretty sure the connector pitch is 1.25mm. But actually I do not think it is a connector of an original JST series (at least I haven't found a similar genuine one)?!
But if you're googling "JST 1.25mm" you'll find something that looks very close...
Examples:
The one on the board (SMD Header)
?("Horizontal SMD", "2P")
The one on the cable (Housing)
?("JST 1.25mm, "50pcs 2P")
Pretty sure they are the right ones (but of course no guarantee)?
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Re: TinySA calibration and level check with sma cable or both cables?
Thank you Zack for your reply to my question. The following YouTube url was the one causing my concerns over using one or two cables: https://www.youtube.com/watch?v=6xSXPVxaJxI You will see him state using two cables needed at around 6 1/2 minutes into the video. Again, thank you for making good sense of this matter.
On Thursday, April 14, 2022, 07:53:01 AM CDT, Zack Widup <w9sz.zack@...> wrote:
I believe the TinySA is only measuring signal levels, not phase differences, as the NanoVNA does on calibration. Using two might actually have a negative effect on the calibration. You have the insertion loss of the interface between two pieces of coax and the SMA barrel connector.
73, Zack W9SZ
On Wed, Apr 13, 2022 at 8:26 PM George Dukish via <georgedukish= [email protected]> wrote: What is the proper way to calibrate unit? I see one person uses one sma cable between low and high. Then, I see another person states that the unit comes with 2 cables and a barrel connector, as it is necessary to join 2 cables between low and high. Please advise.
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Re: Having to replace internal LiPo battery...
The battery is of the type: 602540, 3.7V, 650mAh
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Re: Having to replace internal LiPo battery...
Good question...
Pretty sure the connector pitch is 1.25mm. But actually I do not think it is a connector of an original JST series (at least I haven't found a similar genuine one)?!
But if you're googling "JST 1.25mm" you'll find something that looks very close...
Examples:
The one on the board (SMD Header)
?("Horizontal SMD", "2P")
The one on the cable (Housing)
?("JST 1.25mm, "50pcs 2P")
Pretty sure they are the right ones (but of course no guarantee)?
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Re: TinySA calibration and level check with sma cable or both cables?
I believe the TinySA is only measuring signal levels, not phase differences, as the NanoVNA does on calibration. Using two might actually have a negative effect on the calibration. You have the insertion loss of the interface between two pieces of coax and the SMA barrel connector.
73, Zack W9SZ
On Wed, Apr 13, 2022 at 8:26 PM George Dukish via <georgedukish= [email protected]> wrote: What is the proper way to calibrate unit? I see one person uses one sma cable between low and high. Then, I see another person states that the unit comes with 2 cables and a barrel connector, as it is necessary to join 2 cables between low and high. Please advise.
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With comparable phase noise and an RBW range that is less than the SI4432 there is no obvious reason to go for this chip. Obsolete for the SI4432 means "not recommended for new designs" but the manufacturer still continuous manufacturing. --
For more info on the tinySA go to https://tinysa.org/wiki/
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This is a bit embarassing as this post was intended to be in the HBTE group, but anyway. The chip have LoRa and FSK modem built in and I have no idea if it is possible to pull of OOK in SW, as I just stumbled upon it. The thing I found interesting about it is that has debug states to put the chip in countinous send or recieve mode at arbitrarily chosen frequency within its span so I suppose one could pull it of by polling the rssi register for receive and toggle the PA for transmission. I am not shure what you mean by BW but if you mean RBW it can be set in fixed steps between 4.8kHz to 467kHz.?
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Hoe about bandwidth and supporting SW OOK mode? --
For more info on the tinySA go to https://tinysa.org/wiki/
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Has anyone of you had a look at this chip from semtech? Since Si4432 has become obsolete I browsed for a chip that can take its place as a platform for RF tools. It has continous frequency span from 150MHz to 960MHz and comparable phase noise as Si4432 with the disclaimer that it is frequency dependant. For me, fast sweep time is beneficial as I often scan wide chunks of spectrum and this chip have a pll settling time of 30us. It¡¯s quite good , is it? Have I missed something that makes this chip a dead end to persue further? ? ?
Link
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Re: TinySA calibration and level check with sma cable or both cables?
Erik, while I have you on the phone, can you tell me the pitch of the JST plug, that the 602540 LiPo battery has within the unit, as I have to replace mine for not holding a charge anymore? I charged said battery out of the unit and load tested it to be only 46mAh in capacity. It looks and calipers out to be either 1.25 or 1.50mm. Which is it for sure? Regards, Geo.
On Thursday, April 14, 2022, 12:43:41 AM CDT, Erik Kaashoek <erik@...> wrote:
Indeed, one cable is the way to do it. When done right, using two cables will however not make any noticeable difference. -- For more info on the tinySA go to https://tinysa.org/wiki/
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Re: TinySA calibration and level check with sma cable or both cables?
Thank you Erik. My 3 TinySA(s) thank you as well.
On Thursday, April 14, 2022, 12:43:41 AM CDT, Erik Kaashoek <erik@...> wrote:
Indeed, one cable is the way to do it. When done right, using two cables will however not make any noticeable difference. -- For more info on the tinySA go to https://tinysa.org/wiki/
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Re: TinySA calibration and level check with sma cable or both cables?
Indeed, one cable is the way to do it. When done right, using two cables will however not make any noticeable difference. --
For more info on the tinySA go to https://tinysa.org/wiki/
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Re: TinySA calibration and level check with sma cable or both cables?
It could be done that way, but why? introduce more unneeded connections that could cause problems. Anyway, the author of the TinySA wrote it that way, so I do it that way.? I am sure you will really find the TinySA super useful. JUST BE CAREFUL not to overload the input and be very careful of static charges.? Clyde KC7BJE?
On Wed, Apr 13, 2022, 8:42 PM George Dukish via <georgedukish= [email protected]> wrote: Thank you Clyde for clearing up the use of only one cable needed to carry out cal. The issue of 2 cables needed, to carry out cal, came from a 'YouTuber'.
On Wednesday, April 13, 2022, 10:03:43 PM CDT, Clyde Lambert < clyde.lambert@...> wrote:
- ?is used to calibrate the power measurement levels. A new menu appears and you will be asked to to connect the low and high input/output. After connecting the cable, activate?CALIBRATE. The calibration can be reset by?RESET CALIBRATION. At the end of the calibration switch of the tinySA. After switching on again the numbers indicating the power levels should be in white to indicate the power reading is calibrated. An uncalibrated state is indicated with red level indicators. The level calibration data is stored in the leveloffset configuration variable.
On Wed, Apr 13, 2022, 6:26 PM George Dukish via <georgedukish= [email protected]> wrote: What is the proper way to calibrate unit? I see one person uses one sma cable between low and high. Then, I see another person states that the unit comes with 2 cables and a barrel connector, as it is necessary to join 2 cables between low and high. Please advise.
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Re: TinySA calibration and level check with sma cable or both cables?
Again, thanks Clyde for your help and see this Youtuber that caused my concern over the having to use 2 cables: " https://www.youtube.com/watch?v=6xSXPVxaJxI " He refers to same around 6 1/2 minutes into the video.
On Wednesday, April 13, 2022, 10:03:43 PM CDT, Clyde Lambert <clyde.lambert@...> wrote:
- ?is used to calibrate the power measurement levels. A new menu appears and you will be asked to to connect the low and high input/output. After connecting the cable, activate?CALIBRATE. The calibration can be reset by?RESET CALIBRATION. At the end of the calibration switch of the tinySA. After switching on again the numbers indicating the power levels should be in white to indicate the power reading is calibrated. An uncalibrated state is indicated with red level indicators. The level calibration data is stored in the leveloffset configuration variable.
On Wed, Apr 13, 2022, 6:26 PM George Dukish via <georgedukish= [email protected]> wrote: What is the proper way to calibrate unit? I see one person uses one sma cable between low and high. Then, I see another person states that the unit comes with 2 cables and a barrel connector, as it is necessary to join 2 cables between low and high. Please advise.
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Re: TinySA calibration and level check with sma cable or both cables?
Thank you Clyde for clearing up the use of only one cable needed to carry out cal. The issue of 2 cables needed, to carry out cal, came from a 'YouTuber'.
On Wednesday, April 13, 2022, 10:03:43 PM CDT, Clyde Lambert <clyde.lambert@...> wrote:
- ?is used to calibrate the power measurement levels. A new menu appears and you will be asked to to connect the low and high input/output. After connecting the cable, activate?CALIBRATE. The calibration can be reset by?RESET CALIBRATION. At the end of the calibration switch of the tinySA. After switching on again the numbers indicating the power levels should be in white to indicate the power reading is calibrated. An uncalibrated state is indicated with red level indicators. The level calibration data is stored in the leveloffset configuration variable.
On Wed, Apr 13, 2022, 6:26 PM George Dukish via <georgedukish= [email protected]> wrote: What is the proper way to calibrate unit? I see one person uses one sma cable between low and high. Then, I see another person states that the unit comes with 2 cables and a barrel connector, as it is necessary to join 2 cables between low and high. Please advise.
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Re: TinySA calibration and level check with sma cable or both cables?
- ?is used to calibrate the power measurement levels. A new menu appears and you will be asked to to connect the low and high input/output. After connecting the cable, activate?CALIBRATE. The calibration can be reset by?RESET CALIBRATION. At the end of the calibration switch of the tinySA. After switching on again the numbers indicating the power levels should be in white to indicate the power reading is calibrated. An uncalibrated state is indicated with red level indicators. The level calibration data is stored in the leveloffset configuration variable.
On Wed, Apr 13, 2022, 6:26 PM George Dukish via <georgedukish= [email protected]> wrote: What is the proper way to calibrate unit? I see one person uses one sma cable between low and high. Then, I see another person states that the unit comes with 2 cables and a barrel connector, as it is necessary to join 2 cables between low and high. Please advise.
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Marcelo PP5MGT
Clyde Lambert