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Re: Attenuator Fail - Again

 

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I’ve so far only used it with the external antenna on, measuring IF oscillator frequencies by waving the antenna near the oscillator tuning capacitor.? To my recollection, there’s been no chance for an overload.

?

From: "[email protected]" <[email protected]> on behalf of John Cunliffe W7ZQ <n2nep@...>
Reply-To: "[email protected]" <[email protected]>
Date: Wednesday, September 22, 2021 at 2:56 PM
To: "[email protected]" <[email protected]>
Subject: Re: [tinysa] Attenuator Fail - Again

?

The main reason for input attenuator failure on any spectrum analyzer is front end overload. Are you making sure you don't have too much power at the input? Not just the main signal but others within the bandwith combined. A fellow ham blew out the attenuator of his TinySA checking a 2-30Mhz preamplifier that unfortunately had a spurious oscillation at 200Mhz producing nearly 150mw of signal. I always recommend the use of a power limiter similar to

?

unless people are absolute certain the combined signals between 100Kz and 350Mhz will not exceed the input capabilities of the instrument.

John

Re: Attenuator Fail - Again

 

The main reason for input attenuator failure on any spectrum analyzer is front end overload. Are you making sure you don't have too much power at the input? Not just the main signal but others within the bandwith combined. A fellow ham blew out the attenuator of his TinySA checking a 2-30Mhz preamplifier that unfortunately had a spurious oscillation at 200Mhz producing nearly 150mw of signal. I always recommend the use of a power limiter similar to

?

unless people are absolute certain the combined signals between 100Kz and 350Mhz will not exceed the input capabilities of the instrument.

John
Attenuator Fail - Again

 

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I’ve had my TinySA for a few weeks.? Today I ran the self-test and I’m getting the “Test 12: Attenuator Fail” when running the self-test.? All the other tests are passing.? This is the second TinySA I’ve had with this failure popping up (the last one was returned for exchange) – is this a critical issue or can I ignore it?

?

Steve, KW4H
Re: New video: September 2021 feature update

 

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Thanks, Ted. I didn't even notice the new menus after installing 1.3-317. I just saw that Erik was using -319, and thought I needed that.

Terry

On 9/22/2021 12:19 PM, Ted Chesley wrote:

Hey Terry, ver 1.3.317 is the latest and the subject of the video

.....Ted

-----------------------------------------

From: "Terry Perdue"
To: [email protected]
Cc:
Sent: Wednesday September 22 2021 12:10:57PM
Subject: Re: [tinysa] New video: September 2021 feature update

Erik,

Where do we find the latest file to download? The latest I can find is 1.3317.

Many thanks!

Terry Perdue

On 9/22/2021 7:49 AM, Erik Kaashoek wrote:
This video demonstrates some of the new feature in the latest firmware update. Most important change is the new TRACE menu allowing full flexibility on how to use the three available traces. An advanced feature demonstrated is how to compensate frequency dependent gain of an amplifier or antenna using a stored trace defined by a table modeling the gain versus frequency

------------------------------------------
For more info on the tinySA go to


Re: New video: September 2021 feature update

 

Hey Terry, ver 1.3.317 is the latest and the subject of the video

.....Ted

-----------------------------------------

From: "Terry Perdue"
To: [email protected]
Cc:
Sent: Wednesday September 22 2021 12:10:57PM
Subject: Re: [tinysa] New video: September 2021 feature update

Erik,

Where do we find the latest file to download? The latest I can find is 1.3317.

Many thanks!

Terry Perdue


On 9/22/2021 7:49 AM, Erik Kaashoek wrote:
This video demonstrates some of the new feature in the latest firmware update. Most important change is the new TRACE menu allowing full flexibility on how to use the three available traces. An advanced feature demonstrated is how to compensate frequency dependent gain of an amplifier or antenna using a stored trace defined by a table modeling the gain versus frequency

------------------------------------------
For more info on the tinySA go to

Re: TinySA Antenna

 

This is quote long. Hopefully it does not put a strain on the SMA connector.
?
Mike N2MS

On 09/22/2021 12:11 PM N0YWB <n0ywb1@...> wrote:
?
?

Replacement SMA male connector 7-section telescoping antenna. 100 cm extended, 20 cm collapsed.

$3.59 + $3.99 shipping ?

?
Re: New video: September 2021 feature update

 

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Erik,

Where do we find the latest file to download? The latest I can find is 1.3317.

Many thanks!

Terry Perdue

On 9/22/2021 7:49 AM, Erik Kaashoek wrote:

This video demonstrates some of the new feature in the latest firmware update. Most important change is the new TRACE menu allowing full flexibility on how to use the three available traces. An advanced feature demonstrated is how to compensate frequency dependent gain of an amplifier or antenna using a stored trace defined by a table modeling the gain versus frequency

------------------------------------------
For more info on the tinySA go to

Re: TinySA Antenna

 

Replacement SMA male connector 7-section telescoping antenna. 100 cm extended, 20 cm collapsed.

$3.59 + $3.99 shipping ?China?
New video: September 2021 feature update

 

This video demonstrates some of the new feature in the latest firmware update. Most important change is the new TRACE menu allowing full flexibility on how to use the three available traces. An advanced feature demonstrated is how to compensate frequency dependent gain of an amplifier or antenna using a stored trace defined by a table modeling the gain versus frequency

------------------------------------------
For more info on the tinySA go to https://tinysa.org/wiki/
Re: WARNING: Mirfield sold clones after they promised not to do so.

 

Hello all,
Just to follow up my previous message.
I received my TinySA from Mirfield Electronics yesterday - four days after I ordered it (with a weekend in between).
From what I can see (checking the points on ) it is a totally legitimate genuine item.
I have not updated the firmware yet but it is showing "v1.3-111" dated 15th May 2021.

Chris
G8IPN
Re: TinySA Antenna

 

And on what band you are looking for antennas?

Re: Uploaded latest firmware but TinySA still shows prior FW

mikemm58
 

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Ok well don't I feel silly now. Okay the "0.3" wasn't the FW version.

I put on my glasses and saw in the text further down the actual FW. It shows 1.3.317 dated Aug 23, 2021.

I'll go crawl back under my rock now...

Mike
Uploaded latest firmware but TinySA still shows prior FW

mikemm58
 

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Hello,? Sorry if this has been already been gone over, but I downloaded the latest

DFU file for upgrading my FW from 0.3 to 1.3.? After figuring out how to get the proper

drivers loaded and the DfuSeDemo to see the TinySA, I was able to apparently get a

successful upload to the TinySA.

?

However, when I check under CONFIG>VERSION, it still says v0.3

?

What did I miss?

?

Thanks

?

Mike

?

?
Re: TinySA Antenna

 

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John,

I measured SWR of tinySA Telescopic Antenna by NanoVNA SAA2.

The antenna with max length has good SWR at 300MHz and 740MHz.

It has very bad SWR under 300MHz.

でつ good grief?





? tommie from Tokyo, JP

2021/09/22 2:52、John Cunliffe W7ZQ <n2nep@...&驳迟;のメール:

?Tommie

The impedance of a telescopic antenna is nowhere near either 75 nor 50 ohms unless adjusted in length to a specific frequency. It will then be impedance matched on this one frequency only. Any telescopic antenna with SMA connector will work. The input of the TinySA however is 50 ohms.


John

Re: TinySA Antenna

 

Tommie

The impedance of a telescopic antenna is nowhere near either 75 nor 50 ohms unless adjusted in length to a specific frequency. It will then be impedance matched on this one frequency only. Any telescopic antenna with SMA connector will work. The input of the TinySA however is 50 ohms.


John
Re: tinysa can't connect or see in com port or usb connections for PC windows 7 #tinysa

 

The TinySA communicates with the PC in two modes:? USB Console and DFU mode.? They use different drivers for each mode.
USB Console Mode is used to communicate with the PC application "tinySA-App"
DFU mode is used to update the firmware

WIN 7 does not come with the drivers to recognize the TinySA in USB mode or DFU mode.

A similar problem exists with the NanoVNA which uses a similar USB interface.? The problem is discussed in this document which uses the PC app NanoVNA Saver (TinySA uses "tinySA-App")?


Here is a source for the driver for USB mode . You want? en.stsw-stm32102.zip (STM32 Virtual Com Port driver).? Unzip it and install the Windows 7 version.? After that you can connect to "tinySA-App" by selecting the associated COM port.

For upgrading the firmware you will need to install the DFU driver which is another stp.

Roger
Re: TinySA Antenna

 

Cheaper but not faster:



Le?mar. 21 sept. 2021 à?17:04, Al Ardon (N9UO) <agardon78@...> a écrit?:
Thanks John I got one ordered.


On Sep 21, 2021, at 09:49, tommie <open.tommie@...> wrote:

?The antenna impedace is 75 Ohm.
not 50 Ohm

? tommie from tokyo

2021/09/21 23:40、John Cunliffe W7ZQ <n2nep@...&驳迟;のメール:

?

Re: TinySA Antenna

Al Ardon (N9UO)
 

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Thanks John I got one ordered.


On Sep 21, 2021, at 09:49, tommie <open.tommie@...> wrote:

?The antenna impedace is 75 Ohm.
not 50 Ohm

? tommie from tokyo

2021/09/21 23:40、John Cunliffe W7ZQ <n2nep@...&驳迟;のメール:

?https://www.amazon.com/RuiLing-Section-Connector-Telescopic-Antennas/dp/B07VRYXCXG/ref=sr_1_3?dchild=1&keywords=telescopic+antenna+with+sma+connector&qid=1632235160&s=electronics&sr=1-3

Re: TinySA Antenna

 

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The antenna impedace is 75 Ohm.
not 50 Ohm

? tommie from tokyo

2021/09/21 23:40、John Cunliffe W7ZQ <n2nep@...&驳迟;のメール:

?https://www.amazon.com/RuiLing-Section-Connector-Telescopic-Antennas/dp/B07VRYXCXG/ref=sr_1_3?dchild=1&keywords=telescopic+antenna+with+sma+connector&qid=1632235160&s=electronics&sr=1-3

Re: TinySA Antenna

 

https://www.amazon.com/RuiLing-Section-Connector-Telescopic-Antennas/dp/B07VRYXCXG/ref=sr_1_3?dchild=1&keywords=telescopic+antenna+with+sma+connector&qid=1632235160&s=electronics&sr=1-3
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