Some strange maybe "glitches" Aurora

Thanks Len,

I got my Aurora only 3 weeks ago and it has had this "oddity" from day one. Doing a factory reset will only take me back three weeks. It is something I can easily live with for now.

I have a suspicion that since the small frequency jump only happens after the SDR has been running for a few minutes that it is related to the GPS disciplined oscillator. Because my GPS antenna is not real close to a window, it takes a minute or two to lock on to enough satellites to get a good frequency lock.

Also, if I shut down the SDR and start it up again after a minute or two, I get no glitch. I think the GPS receiver uses the very recent data it accumulated and gets a very fast lock on.

I will do some more analysis and share my findings with the community.

73, Al, K2BLA

Len,

I don't start the SDR until the power button light stops blinking and goes steady blue.

David,

When not using the Aurora, I don't use the back panel power switch but turn off a power **** which also powers up my router, external audio amp, keyer etc. In other words, it's the same as pulling the plug. This is after I use the front panel power switch and wait until the all the front panel lights go out.

The next test I am going to do it disconnect the GNSS antenna which will prevent it from switching from TCXO to GNSS disciplined oscillator. I will post what I learn.

Thanks to both of you for your comments.

I mischaracterized my power on sequence. I start the SDR after the blinking green light on the power switch becomes a steady green. The Aurora is located such that I can't easily see the power light from the operating position. This AM I watched the steady green light change to blue which I discovered occurs at the same time as the GNSS rectangle on the lower right-hand corner of the display changes from blinking to steady. At that time, I got the frequency shift. I have had the Aurora for less than 3 weeks and I am still on the learning curve and assumed the steady green was "good to go".

But I also heard the clicking of relays in the RF deck when the blue light appeared. I would assume that relays are only used for switching high power RF. I don't like the idea of hot switching relays, so my new power-on sequence is don't transmit until the GNSS is fully locked. I can live with that now since I know what is causing the frequency shift.

But my power meter full scale situation is still there. This AM on 6m I had a 600w full scale while yesterday I had a 240w full scale on 6m. Sometimes when I change bands from 6m to HF I get the 240w full scale which should be 600w. Sometimes it is 600w on HF. I can't figure out what sequence causes the wrong meter scale. The meter scale seems to be a total **** shoot. Once again this is not a big issue because I am not running over 200w at the moment as I have some antennas that I am concerned that can't handle 500w. I will investigate them in the near future.