What that??????

  • 1
  • Problem
  • Updated 3 weeks ago
Error pop up,
Any idea what’s wrong
Photo of N2TTA

N2TTA

  • 35 Posts
  • 3 Reply Likes

Posted 3 weeks ago

  • 1
Photo of Mark Chamberlain

Mark Chamberlain

  • 13 Posts
  • 1 Reply Like
Hi
I had the same error when operating at JoTA recently when someone fired up on 20 m with out warning me. I was also on 20 working FT8.
In that case it was what it said excessive RF at antenna input.
Not sure if this answer is any help though.
Regards,
Mark
M0 ZSS
Photo of Kevin - KS0CW

Kevin - KS0CW

  • 89 Posts
  • 11 Reply Likes
I have seen this behavior when in FDX and having a second panadapter on a different receive antenna
Photo of K3SF

K3SF

  • 194 Posts
  • 53 Reply Likes
Well this is the rig doing a self protect from high RF on a receiver (aka SCU). 

The second receiver is most likely on FDX (full duplex) and is being overloaded by the transmit
or
the second receiver  (aka 2nd  scu ) is on a different antenna input also receiving high RF from the transmitter.

Best thing to do is check the whole setup and make sure you are not overloading second receive input. 

One scenario ..is operating full duplex...without bandpass filters
.
Another scenario is two antenna inputs to the rig where each scu is on a separate antenna and the antennas are too close together causing high rf input on one of the receivers inputs...

Bottom line is the rig saved it self from destructive RF loaded which would have blownout and SCU and/or its associated preamp

and

so the error message is a good thing done by the radio
and
allows you to double check the setup and operating conditions


Paul K3SF





Photo of N2TTA

N2TTA

  • 35 Posts
  • 3 Reply Likes
even if I disconnected all antennas I have same error at ANT1 positions

My radio just returned from flex repair, Port A was broken. Looks like something wrong again...

No Pa, just 100w
(Edited)
Photo of Kevin - KS0CW

Kevin - KS0CW

  • 89 Posts
  • 11 Reply Likes
With FDX off?
Photo of N2TTA

N2TTA

  • 35 Posts
  • 3 Reply Likes
Yes
Photo of Mark Chamberlain

Mark Chamberlain

  • 13 Posts
  • 1 Reply Like
Hi
I had the same error when operating at JoTA recently when someone fired up on 20 m with out warning me. I was also on 20 working FT8.
In that case it was what it said excessive RF at antenna input.
Not sure if this answer is any help though.
Regards,
Mark
M0 ZSS
Photo of N2TTA

N2TTA

  • 35 Posts
  • 3 Reply Likes
Few days ago radio returned from service with this issue:

Problems / Issues Found:

The following issues were found during the problem assessment phase of the service request:

1. Confirmed customer reported problem of low RF input from ANT1.
2. Also found same issue with RXA & XVTRA.
3. Factory tests confirmed PreSelector A bad.

Corrective Action Taken or Service(s) Performed:

The following corrective actions were performed to resolve the issues noted above.

1. Replaced PreSelector A.
2. Ran full factory tests. Radio passes.
3. Ran full functional tests. Radio passes.
4. Confirmed 0dB loss on all RX inputs.