I recently had a report that my RTTY signal was broad and distorted. I figured I was doing something wrong with the new 6600. I wish I had paid more attention to the spectrum display while transmitting. I noticed that it didn't look as clean as I remembered it looking previously. I couldn't find anything wrong with the settings but I did notice something odd with the tune signal. Can anyone tell me if this is normal?
Here is what a 10 W TUNE signal looks like on my 6600 spectrum display WITHOUT the amp in line:
If I switch the amp in-line and set the tune power to anything between 1 and 70 watts I see this:
This is operating into a dummy load. Looks about the same on 80-40-20. Didn't try the other bands. The amp is an old Henry 2K . I can even detune the amp so that it isn't putting out any power (maybe a watt) and I still see this same display. And I have swapped out all the cables - RF and otherwise - to make sure that it isn't RF related. Everything is bonded to ground.
This signal doesn't look very clean to me - not compared to the first picture. I don't know where in the signal chain this spectrum is picked from but it is certainly coming from inside the Flex.
How can merely connecting the Flex to the input of an amp affect what comes out of the Flex?
Is what I'm seeing normal?
My RTTY signal looks a lot like the second picture. Probably not good.
Thanks, Mark K5XH