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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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- ?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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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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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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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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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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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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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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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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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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From what I've watched, the Idea of two cables is that you would be using two cables when you checked your filter, or what ever DUT that you have.? The folks that use longer leads with clips etc, include those in the calibration as well.
Simply put, include what ever leads up the the DUT in the calibration as possible
ANG
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You need to calibrate as close to your measurement configuration as possible. ?If you need both cables to interface to the unit under test, then use both cables with the connector to calibrate.
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Thank you for making sense of why 2 cables, of equal length and type, were included in the box. I clearly forgot filter insertion testing between high and low. Again, thank you for your time in this matter. signed, Geo
On Thursday, April 14, 2022, 11:27:21 AM CDT, KM4TRT via groups.io <garello@...> wrote:
From what I've watched, the Idea of two cables is that you would be using two cables when you checked your filter, or what ever DUT that you have.? The folks that use longer leads with clips etc, include those in the calibration as well.
Simply put, include what ever leads up the the DUT in the calibration as possible
ANG
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For calibrating frequency at HF, don't forget about WWV and CHU.? The AM BC stations are also held to a pretty tight standard (if they mind their own business per FCC).??
Dave - W?LEV
On Thu, Apr 14, 2022 at 8:59 PM George Dukish via <georgedukish= [email protected]> wrote: Thank you for making sense of why 2 cables, of equal length and type, were included in the box. I clearly forgot filter insertion testing between high and low. Again, thank you for your time in this matter. signed, Geo
On Thursday, April 14, 2022, 11:27:21 AM CDT, KM4TRT via <garello= [email protected]> wrote:
From what I've watched, the Idea of two cables is that you would be using two cables when you checked your filter, or what ever DUT that you have.? The folks that use longer leads with clips etc, include those in the calibration as well.
Simply put, include what ever leads up the the DUT in the calibration as possible
ANG
-- Dave - W?LEV
Just Let Darwin Work
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William, Thank you for pointing out what I should have already known and have forgotten, being prior Air Force communications repairman overseas. It goes to show that the older I get, the more I seem to forget. When pulling front end RSL (receive signal level) sensitivity, we had to 'zero' out coupling losses before testing. Again, thank you for your time in this matter. signed, Geo.
On Thursday, April 14, 2022, 11:27:35 AM CDT, William Storey <alphabravoonelimazulu@...> wrote:
You need to calibrate as close to your measurement configuration as possible. ?If you need both cables to interface to the unit under test, then use both cables with the connector to calibrate.
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Thanks for reminding me not to forget, as much as I was already taught years ago in the USAF tech schools I attended, regarding such matters. "I hate getting old". Again, thank you Dave for your time.
On Thursday, April 14, 2022, 04:02:51 PM CDT, W0LEV <davearea51a@...> wrote:
For calibrating frequency at HF, don't forget about WWV and CHU.? The AM BC stations are also held to a pretty tight standard (if they mind their own business per FCC).??
Dave - W?LEV
On Thu, Apr 14, 2022 at 8:59 PM George Dukish via <georgedukish= [email protected]> wrote: Thank you for making sense of why 2 cables, of equal length and type, were included in the box. I clearly forgot filter insertion testing between high and low. Again, thank you for your time in this matter. signed, Geo
On Thursday, April 14, 2022, 11:27:21 AM CDT, KM4TRT via <garello= [email protected]> wrote:
From what I've watched, the Idea of two cables is that you would be using two cables when you checked your filter, or what ever DUT that you have.? The folks that use longer leads with clips etc, include those in the calibration as well.
Simply put, include what ever leads up the the DUT in the calibration as possible
ANG
-- Dave - W?LEV
Just Let Darwin Work
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I think too many are confusing the calibration with the nanoVNA SOLT cal. Not the same!.
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Clyde Lambert