Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR, Power Genius, Tuner Genius and Antenna Genius Software?

SmartSDR v3.9.18 and the SmartSDR v3.9.18 Release Notes
SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
Power Genius XL Utility v3.8.9 and the Power Genius XL Release Notes v3.8.9
Tuner Genius XL Utility v1.2.11 and the Tuner Genius XL Release Notes v1.2.11
Antenna Genius Utility v4.1.8
If you are having a problem, please refer to the product documentation or check the Help Center for known solutions.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.

Suggestion on the operation of the ATU

Member ✭✭
in SmartSDR for Windows

After some tests, I realized that a few simple updates will make the ATU more functional.

After turning on the ATU, it tunes based on the frequency you are listening to. But if you change the frequency in the same band, the software will continue to display "Success", even if it is no longer tuned. My suggestion is: every time you change the frequency, the Success option is turned off. If the ATU option is on and you stop moving the frequency, after a while, maybe 5 seconds, it starts to tune back to the new frequency. That way, you will always ensure that the antenna is tuned (if possible).


Marcio - PY5PR

Welcome!

It looks like you're new here. Sign in or register to get started.
Sign In
Register

Comments

  • Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

    @Marcio

    What version of SmartSDR are you using?

  • Member ✭✭

    @Mike-VA3MW , version 3.2.31.

  • Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

    Got it. I will pass that on. 73

  • Member ✭✭✭✭

    Hmmmm, maybe I misunderstand the workings of the ATU. I thought once the ATU had 'tuned' to a given frequency, it was good for about 200khz or so either side of the tuned frequency. It would only require 're tune' (i.e. no longer showing 'Success') if you tuned beyond that boundary and it didn't already have a memorized tuning for the new frequency.

    Did I get that right?

  • Member ✭✭

    I'm not 100% sure in my answer, @ VE7ATJ_Don, but it seems that the further you get out of the tuned frequency, the SWR gets higher and higher, even if "Success" continues to appear, I mean, the ATU does not automatically correct the difference. In my case, at 80m, a small difference in frequency leads to a high ROE.

  • Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

    You do want to check if your are in ATU MEM mode or manual mode.

    Read section 24 of the SmartSDR Manual (or the Maestro manual). There are a number of conditions

    After the ATU has found a successful match, the inductance (L) and capacitance (C) values are valid for a 200 kHz frequency span centered at the frequency the ATU tuning operation was initiated, or +/- 100 KHz. Once you tune the frequency of the transmit Slice beyond that range, the ATU will be put into Bypass mode unless there is a previously saved ATU memory at the new frequency.

    For high Q antennas that have a very narrow low SWR range, ATU memories may be saved every 10 kHz for a very granular ATU memory profile for that particular antenna.

  • Member ✭✭

    @Mike-VA3MW, I am using the MEM mode. I detected this behavior, but there are several situations, changing band or frequency, where Success is appearing on the screen, but when you try to transmit, the SWR is above 2. The suggestion I gave is to try to resolve or minimize this situation. But it's still a suggestion ... 73s

Leave a Comment

Welcome!

It looks like you're new here. Sign in or register to get started.
Sign In
Register

Quick Links

Categories