ATU memory on 1.6.17

  • 2
  • Problem
  • Updated 2 years ago
  • Acknowledged

ATU memory does not appear to be retained in certain circumstances. If you tune to a frequency, (7.076) for example. Confirm MEM indicator is lit and select ATU, the ATU matches, and the "Success", "Mem" indicators are lit and both the ATU and MEM button are lit. Confirm match by selecting the TUNE button, SWR is low.

Here are a couple of ways I observed the issue.

Select MEM button, the "Byp" indicator lights and the MEM and ATU buttons go dark indicating that you have bypassed the ATU. Select MEM button again, the "Success" and "Mem" indicators are lit as well as the MEM and ATU buttons indicating that the ATU memory has been recalled. Select the TUNE button, SWR is high, you now have to complete another ATU cycle.

Start over again by confirming MEM indicator is lit and select ATU, the ATU matches and the "Success", "Mem" indicators are lit and both the ATU and MEM buttons are lit. Confirm match by selecting the TUNE button, SWR is low. With the pan-adapter zoomed out, drag the frequency flag higher or lower in frequency until the "Byp" indicator lights. Now drag the frequency flag back to the exact frequency you started. The "Success" and "Mem" indicators are lit as well as the MEM and ATU buttons indicating that the ATU memory has been recalled. Select the TUNE button, SWR is high, you now have to complete another ATU cycle.

If you change frequency by direct entry on the frequency flag or by memory the issue does not occur. It seems that the ATU going into bypass (Byp) is the common factor.

Photo of Chuck - KJ6HT

Chuck - KJ6HT

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Posted 2 years ago

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Photo of Tim - W4TME

Tim - W4TME, Customer Experience Manager

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Official Response
The ATU power is set automatically and cannot be overridden.

This behavior seems to be incorrect for the ATU.  I will write this up as a defect for further investigation.