What method are you using to reduce the signal output?
_._


On Fri, Feb 26, 2021 at 1:20 PM Rafael Diniz <rafael@rhizomatica.org
<mailto:rafael@rhizomatica.org>> wrote:

HI everybody,

When transmitting an OFDM signal with 8W until 10W with the ubitx v6,
the output signal is crystal clear, but when I start to reduce the
signal level (from a line-out of a computer), at 6 or 4W, the signal
gets very distorted. Am I doing something wrong?

Rafael PU2UIT

Hi,

I would guess that at too low of audio input, you don't have enough
drive for the modulator.

Instead, once you have a good level for a clean signal, you might want
to try adjusting RV1 so the amp output is lowered.

73,


Mark

Hi Mark,

I think you are right. What is the RV1?

(sorry the newbie question)

Rafael

On 2/26/21 6:09 PM, Mark - N7EKU wrote:

Hi,

I would guess that at too low of audio input, you don't have enough
drive for the modulator.

Instead, once you have a good level for a clean signal, you might want
to try adjusting RV1 so the amp output is lowered.

73,


Mark

RV1 is power output control, see PCB - not the blue twins, those are bias.