How do I adjust the AntScope2 SWR scale?
Thanks.
...73, Ron, K0BRO
|
Dear friends!
We have released a new firmware version for the Stick230 analyzer.
This firmware adds two new features:
- custom OSL calibration.
- the ability to load / save measurement results into memory.
?
Some work has also been done to improve the stability of the Bluetooth connection.
?
Firmware version 1.7
Update your analyzer using the FlashTool utility.  ? ??  ? ?  ?
Information on using OSL calibration has already been added to the manual:?https://rigexpert.com/products/antenna-analyzers/stick-230/users-manual/
Instructions on how to use load / save measurements will be added in the coming days.
?
Best regards, Alex Antonov
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Antscope2 v1.1.3, AA-600, WIN10 2004, TDR X-axis very inaccurate when zoomed in
Hello dear Alex and Group-Family :-) Can you please check urself and correct the units when zoomed in to the maximum in the TDR mode for the next software revision 1.1.4? I made some measurements with short cables (lamba/2 x V for 144MHz). I set "Full Range" and 400 points. First the display is very small to the left and with moving the cursor to the very left I can push SHIFT and scroll with the mouse wheel to zoom in to the maximum display. 1. Can you eventually add one or two more horizontal zoom steps für shorter cables? 2. When zoomed in please check the units on the X-axis (I set "m"), they show as follows ??? Info-box at:???? 0.15m / 0.30m / 0.45m / 0.60m / 0.75m / 0.90m / 1.05m / 1.20m / 1.35m / 1.50m / 1.65m etc.? ??? X-axis shows: ?? 0m? /??? 0m?? /??? 0m?? /?? 1m ?? /?? 1m ?? /?? 1m ?? /?? 1m ?? /??? 1m ?? /??? 1m?? /??? 2m?? /?? 2m??? etc. 3. The RigExpert-logo top right is appearing to big on my 4k LG-Monitor with 3840/2160px, Text set to 175%. ??? I Only see this part: "RigE" while the "g" looks like an "o" because of a cut on top and at the bottom, too: ???  4. The version info (info.txt) on your download site only goes to v 1.1.2. ???? Can you please add the changes for v1.1.3, too? 5. Can you please add the cables "AIRCOMplus" and "AIRCOM Premium" to the list, too? So, dear Alex, that's it for the moment. Many thanks for otherwise very fine hardware and software products! Best regards from Switzerland and take care! Chris, HB9DFG
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Re: Antscope2 TDR Y axis units
Hello Kirk,
At the moment, this function is not available in AntScope2.
I passed your wish on to our developers.
If there is a technical possibility, then this function will be
implemented.
Best Regards, Alex
16.10.2020 20:15, K4RO пише:
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Show quoted text
Is it
possible for Antscope2 to display absolute Z on the Y axis in TDR
mode? Currently it displays a value relative to Zo. I wish to
display absolute Z in ohms. I understand that the absolute Z value
can be read at the current cursor position, but I am wondering if
the Y axis can be changed to display absolute Z instead of
relative to Zo?
Thanks,
--Kirk K4RO
|
Antscope2 TDR Y axis units
Is it possible for Antscope2 to display absolute Z on the Y axis in TDR mode? Currently it displays a value relative to Zo. I wish to display absolute Z in ohms. I understand that the absolute Z value can be read at the current cursor position, but I am wondering if the Y axis can be changed to display absolute Z instead of relative to Zo?
Thanks,
--Kirk K4RO
|
Re: AA-230 Zoom - measuring chokes
Some suggested reading on the topic:
(What a brilliant editor, I cannot revert to paragraph format!)
The first article uses an AIM analyser, but the discussion is appropriate to the Rigexpert analysers.
The second article uses an AA-600... but should be equally applicable to the AA-230 Zoom which I understand has OSL calibration capability.
Owen
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Re: AA-230 Zoom - measuring chokes
Hi Tony, You can in fact measure the impedance (R and X) of a ferrite cored common mode choke with the AA-230 Zoom. The AA-230 Zoom uses a 10 bit ADC, so that is a greater limitation on resolution that say the AA-600... so the range of impedances you can measure with moderate accuracy is reduced. If you connect a ferrite cored inductor with VERY short wires to the AA-230 Zoom and sweep it, you will observe that at extreme impedances, the results become noisy... a consequence of the ADC resolution. Does that make it worthless? It depends on the question you wish to answer. If you want to find the range of frequencies where Zcm is moderately high (say |Zcm>1000), then you don't need to measure Zcm to 1% accuracy, you merely want a plot of Zcm vs f. Now I NEVER use Antscope2 because it cannot display such data. I use a backlevel version of Antscope (1).  Now you can see that it does get the jaggies at really high magnitudes, and the AA-230 will be more limited in range. We can however reasonably say that |Zcm|>1000 from 1-30MHz, >2000 from 1.6-16MHz. You might not be able to use the AA-230 Zoom with Antscope(1), but you can export the data as s1p and use it in another application to analyse it. A bit laborious, but it can be done. When you start making measurements, you will find that the response is EXTREMELY sensitive to physical layout of the inductor and the connections... you will see the self resonant frequency vary widely with changes in layout. That sensitivity is not a defect of the measurement environment, the same thing will happen if you box the inductor up with connectors etc. On the matter of reconciliation of measurement with calculators, most calculators are flawed conceptually and they are unlikely to reconcile. Tools that do not take account of the frequency dependence of permeability, and that it is a complex quantity are going to fail above 1MHz for most ferrites we use in ham radio. Owen
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Re: AA-230 Zoom - measuring chokes
Roger, Thanks for the info. Since I don’t need to do this often, decided to trust my construction technique and just follow the instructions to build the chokes. 73, N2TK, Tony ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Roger Need via groups.io
Sent: Tuesday, October 13, 2020 4:48 PM
To: [email protected]
Subject: Re: [RigExpert Family] AA-230 Zoom - measuring chokes ? On Tue, Oct 13, 2020 at 05:09 AM, N2TK, Tony wrote: Trying to measure the choking impedance of some chokes I wound. Using #8 to
display all parameters. Frequency set to 1800 KHZ.
I am getting strange readings. As an example, chokes wound with a pair of
#75 ferrite cores with 21 turns that should read 13K read Z - 2.3k and R -
292 ohms.
Am I doing something wrong (the usual case) or maybe the AA-230 isn't
designed to do this?
Thanks for any feedback
N2TK, Tony
Tony,
The RigExpert is a one-port VNA that measures the magnitude and phase of the complex reflection coefficient Γ.??? The relationship between?Γ and the device-under-test (DUT) complex impedance (R +jX)? is? Z = Zo*(1+Γ)/(1-Γ) where Zo is usually 50 ohms (can be 75, 300, 600 etc.).? When we have a perfect match DUT Z = 50+j0 and the reflection coefficient Γ is 0.? When Z is larger or smaller than 50 +j0? Γ changes and it is 1 when Z = infinity and -1 when? Z = 0.?? So Γ is in the range of -1 to 1 with 0 occurring with a perfect match.
As the impedance increases beyond 50 ohm Γ does not change in a linear fashion but changes in increasing smaller increments.? Here are some examples where the load Z is a pure resistance (X =0).
Z - load?? Magnitude of Γ
----------?? --------------------
50???????????????? 0 ???
75??????????????? .2
100????????????? .333
150????????????? .5
200????????????? .6
250????????????? .666
500????????????? .818
1000??????????? .905
1500??????????? .9354
2000??????????? .9512
3000??????????? .9672
From the above you can see that once you get above 500 ohms small measurement errors of the reflection coefficient will result in large errors in the estimate of Z.?? So it is not possible to accurately measure Z in the thousands of ohms (which is what you want to do if measuring RF chokes)? with a one port VNA like the RigExpert.? It is possible using a 2 port VNA using what is known as the S21 method but this requires a high end VNA in order to get accurate results.?
Roger
|
Re: AA-230 Zoom - measuring chokes
On Tue, Oct 13, 2020 at 05:09 AM, N2TK, Tony wrote:
Trying to measure the choking impedance of some chokes I wound. Using #8 to
display all parameters. Frequency set to 1800 KHZ.
I am getting strange readings. As an example, chokes wound with a pair of
#75 ferrite cores with 21 turns that should read 13K read Z - 2.3k and R -
292 ohms.
Am I doing something wrong (the usual case) or maybe the AA-230 isn't
designed to do this?
Thanks for any feedback
N2TK, Tony
Tony, The RigExpert is a one-port VNA that measures the magnitude and phase of the complex reflection coefficient Γ.??? The relationship between? Γ and the device-under-test (DUT) complex impedance (R +jX)? is? Z = Zo*(1+ Γ)/(1- Γ) where Zo is usually 50 ohms (can be 75, 300, 600 etc.).? When we have a perfect match DUT Z = 50+j0 and the reflection coefficient Γ is 0.? When Z is larger or smaller than 50 +j0? Γ changes and it is 1 when Z = infinity and -1 when? Z = 0.?? So Γ is in the range of -1 to 1 with 0 occurring with a perfect match. As the impedance increases beyond 50 ohm Γ does not change in a linear fashion but changes in increasing smaller increments.? Here are some examples where the load Z is a pure resistance (X =0). Z - load?? Magnitude of Γ
----------?? --------------------
50???????????????? 0 ??? 75??????????????? .2 100????????????? .333 150????????????? .5 200????????????? .6 250????????????? .666 500????????????? .818 1000??????????? .905 1500??????????? .9354 2000??????????? .9512 3000??????????? .9672 From the above you can see that once you get above 500 ohms small measurement errors of the reflection coefficient will result in large errors in the estimate of Z.?? So it is not possible to accurately measure Z in the thousands of ohms (which is what you want to do if measuring RF chokes)? with a one port VNA like the RigExpert.? It is possible using a 2 port VNA using what is known as the S21 method but this requires a high end VNA in order to get accurate results.? Roger
|
Re: AA-230 Zoom - measuring chokes
Tony, thanks!
Tell me if I can be of service to you in the future.
By the way, if you have a couple of minutes of free time and
desire, please share your experience of using the analyzer here:
Best Regards, Alex
13.10.2020 18:14, N2TK, Tony via
groups.io пише:
toggle quoted message
Show quoted text
Alex,
Thanks for the feedback and the article
info. Looks like I will need to spring for a VNA if I want to
measure the common mode choking impedance.
I really like the AA-230. It was very
helpful this past summer tracking down some coax issues and
checking loss in the coax.
?
73,
N2TK, Tony
?
?
Ok Tony,
AA-230 Zoom is not entirely suitable for these purposes, since
the analyzer measures the S11 parameter (reflection
coefficient).
For such measurements, a device measuring S21 parameter? is
required.
Here's a nice article:
Regards, Alex
13.10.2020 17:25, N2TK, Tony via
groups.io пише:
Alex,
Maybe I am using the wrong words. I wound
a few coils on ferrite cores based on literature. What I
would like to do is see if they measure similarly to the
literature before I install them. These are common mode
chokes. The literature refers the value as choking impedance
Rs in ohms at Frequency.
Is there a way to do this with the AA-230
Zoom?
I have attached a sample picture of what
I tried to do.
?
73,
N2TK, Tony
?
?
Dear Tony,
Let me ask you a few questions:
For what purpose do you need to measure the impedance of a
choke?
For example, when calculating and manufacturing various
filters, we need to know the inductance of the choke (and
its Q-factor). But not impedance. The filter (as a
ready-made unit) has its own impedance.
It is possible to measure the inductance of the choke with
an analyzer (observing some conditions).
Best Regards, Alex
13.10.2020 15:08, N2TK, Tony via
groups.io пише:
Trying to measure the choking impedance of some chokes I wound. Using #8 to
display all parameters. Frequency set to 1800 KHZ.
I am getting strange readings.? As an example, chokes wound with a pair of
#75 ferrite cores with 21 turns that should read 13K read Z - 2.3k and R -
292 ohms.
Am I doing something wrong (the usual case) or maybe the AA-230 isn't
designed to do this?
Thanks for any feedback
N2TK, Tony
?
?
?
?
?
?
|
Re: AA-230 Zoom - measuring chokes
Alex, Thanks for the feedback and the article info. Looks like I will need to spring for a VNA if I want to measure the common mode choking impedance. I really like the AA-230. It was very helpful this past summer tracking down some coax issues and checking loss in the coax. ? 73, N2TK, Tony ?
toggle quoted message
Show quoted text
From: [email protected] < [email protected]> On Behalf Of Alex RigExpert via groups.io Sent: Tuesday, October 13, 2020 10:53 AM To: [email protected]Subject: Re: [RigExpert Family] AA-230 Zoom - measuring chokes ? Ok Tony,
AA-230 Zoom is not entirely suitable for these purposes, since the analyzer measures the S11 parameter (reflection coefficient).
For such measurements, a device measuring S21 parameter? is required.
Here's a nice article:
Regards, Alex 13.10.2020 17:25, N2TK, Tony via groups.io пише: Alex, Maybe I am using the wrong words. I wound a few coils on ferrite cores based on literature. What I would like to do is see if they measure similarly to the literature before I install them. These are common mode chokes. The literature refers the value as choking impedance Rs in ohms at Frequency. Is there a way to do this with the AA-230 Zoom? I have attached a sample picture of what I tried to do. ? 73, N2TK, Tony ? ? Dear Tony,
Let me ask you a few questions:
For what purpose do you need to measure the impedance of a choke?
For example, when calculating and manufacturing various filters, we need to know the inductance of the choke (and its Q-factor). But not impedance. The filter (as a ready-made unit) has its own impedance.
It is possible to measure the inductance of the choke with an analyzer (observing some conditions).
Best Regards, Alex 13.10.2020 15:08, N2TK, Tony via groups.io пише: Trying to measure the choking impedance of some chokes I wound. Using #8 to display all parameters. Frequency set to 1800 KHZ. I am getting strange readings.? As an example, chokes wound with a pair of #75 ferrite cores with 21 turns that should read 13K read Z - 2.3k and R - 292 ohms. Am I doing something wrong (the usual case) or maybe the AA-230 isn't designed to do this? Thanks for any feedback N2TK, Tony ? ? ? ? ? ?
|
Re: AA-230 Zoom - measuring chokes
Ok Tony,
AA-230 Zoom is not entirely suitable for these purposes, since the
analyzer measures the S11 parameter (reflection coefficient).
For such measurements, a device measuring S21 parameter? is
required.
Here's a nice article:
Regards, Alex
13.10.2020 17:25, N2TK, Tony via
groups.io пише:
toggle quoted message
Show quoted text
Alex,
Maybe I am using the wrong words. I wound a
few coils on ferrite cores based on literature. What I would
like to do is see if they measure similarly to the literature
before I install them. These are common mode chokes. The
literature refers the value as choking impedance Rs in ohms at
Frequency.
Is there a way to do this with the AA-230
Zoom?
I have attached a sample picture of what I
tried to do.
?
73,
N2TK, Tony
?
?
Dear Tony,
Let me ask you a few questions:
For what purpose do you need to measure the impedance of a
choke?
For example, when calculating and manufacturing various
filters, we need to know the inductance of the choke (and its
Q-factor). But not impedance. The filter (as a ready-made
unit) has its own impedance.
It is possible to measure the inductance of the choke with an
analyzer (observing some conditions).
Best Regards, Alex
13.10.2020 15:08, N2TK, Tony via
groups.io пише:
Trying to measure the choking impedance of some chokes I wound. Using #8 to
display all parameters. Frequency set to 1800 KHZ.
I am getting strange readings.? As an example, chokes wound with a pair of
#75 ferrite cores with 21 turns that should read 13K read Z - 2.3k and R -
292 ohms.
Am I doing something wrong (the usual case) or maybe the AA-230 isn't
designed to do this?
Thanks for any feedback
N2TK, Tony
?
?
?
?
?
?
|
Re: AA-230 Zoom - measuring chokes
Alex, Maybe I am using the wrong words. I wound a few coils on ferrite cores based on literature. What I would like to do is see if they measure similarly to the literature before I install them. These are common mode chokes. The literature refers the value as choking impedance Rs in ohms at Frequency. Is there a way to do this with the AA-230 Zoom? I have attached a sample picture of what I tried to do. ? 73, N2TK, Tony ?
toggle quoted message
Show quoted text
From: [email protected] < [email protected]> On Behalf Of Alex RigExpert via groups.io Sent: Tuesday, October 13, 2020 9:01 AM To: [email protected]Cc: Serhii Litvinov <s.litvinov@...>; Ashot Andreev <aandreev@...> Subject: Re: [RigExpert Family] AA-230 Zoom - measuring chokes ? Dear Tony,
Let me ask you a few questions:
For what purpose do you need to measure the impedance of a choke?
For example, when calculating and manufacturing various filters, we need to know the inductance of the choke (and its Q-factor). But not impedance. The filter (as a ready-made unit) has its own impedance.
It is possible to measure the inductance of the choke with an analyzer (observing some conditions).
Best Regards, Alex 13.10.2020 15:08, N2TK, Tony via groups.io пише: Trying to measure the choking impedance of some chokes I wound. Using #8 to display all parameters. Frequency set to 1800 KHZ. I am getting strange readings.? As an example, chokes wound with a pair of #75 ferrite cores with 21 turns that should read 13K read Z - 2.3k and R - 292 ohms. Am I doing something wrong (the usual case) or maybe the AA-230 isn't designed to do this? Thanks for any feedback N2TK, Tony ? ? ? ? ? ?
|
Re: AA-230 Zoom - measuring chokes
Dear Tony,
Let me ask you a few questions:
For what purpose do you need to measure the impedance of a choke?
For example, when calculating and manufacturing various filters,
we need to know the inductance of the choke (and its Q-factor).
But not impedance. The filter (as a ready-made unit) has its own
impedance.
It is possible to measure the inductance of the choke with an
analyzer (observing some conditions).
Best Regards, Alex
13.10.2020 15:08, N2TK, Tony via
groups.io пише:
toggle quoted message
Show quoted text
Trying to measure the choking impedance of some chokes I wound. Using #8 to
display all parameters. Frequency set to 1800 KHZ.
I am getting strange readings. As an example, chokes wound with a pair of
#75 ferrite cores with 21 turns that should read 13K read Z - 2.3k and R -
292 ohms.
Am I doing something wrong (the usual case) or maybe the AA-230 isn't
designed to do this?
Thanks for any feedback
N2TK, Tony
|
AA-230 Zoom - measuring chokes
Trying to measure the choking impedance of some chokes I wound. Using #8 to
display all parameters. Frequency set to 1800 KHZ.
I am getting strange readings. As an example, chokes wound with a pair of
#75 ferrite cores with 21 turns that should read 13K read Z - 2.3k and R -
292 ohms.
Am I doing something wrong (the usual case) or maybe the AA-230 isn't
designed to do this?
Thanks for any feedback
N2TK, Tony
|
toggle quoted message
Show quoted text
El jue., 8 oct. 2020 a las 12:16, Alex RigExpert via (<support= [email protected]>) escribió:
Hola Jorge,
Yes, indeed, the AA-30/54/170 analyzers do not have an OSL
calibration function.
Best Regards, Alex Antonov UR4MCB
08.10.2020 18:03, Jorge Diez - CX6VM
пише:
Hello
I need to calibrate my AA-30
I found a video for the AA-230, that it has a calibration
option on the main manu.
But AA-30 don`t have it. So is not possible to do a
calibration on the AA-30?
thanks!
--
73,
Jorge
CX6VM/CW5W
|
Re: Rigexpert Antscope2 is working in my nanovna-h
Same here!? Just picked up a NanoVNA-H4 and after testing with it's own software, I opened Antscope2 and it connected and works perfectly! Woo Hoo!
|
Re: AA-30 Zero Firmware Update problem.
I'll do that, thanks Alex and Jonas :)
|
Hola Jorge,
Yes, indeed, the AA-30/54/170 analyzers do not have an OSL
calibration function.
Best Regards, Alex Antonov UR4MCB
08.10.2020 18:03, Jorge Diez - CX6VM
пише:
toggle quoted message
Show quoted text
Hello
I need to calibrate my AA-30
I found a video for the AA-230, that it has a calibration
option on the main manu.
But AA-30 don`t have it. So is not possible to do a
calibration on the AA-30?
thanks!
--
73,
Jorge
CX6VM/CW5W
|
Hello
I need to calibrate my AA-30
I found a video for the AA-230, that it has a calibration option on the main manu.
But AA-30 don`t have it. So is not possible to do a calibration on the AA-30?
thanks!
-- 73,
Jorge
CX6VM/CW5W
|
Alex RigExpert
Roger Need
