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Have barely used mine so far, so don't laugh, and pardon my laziness for not watching all of the videos, in a bit of a hurry...

Started trying the narrow band FM output to check my 2m receiver.? Is there a way to adjust the frequency of the tone when modulating the narrow FM signal?? And also, what is the default tone frequency that is output?

WIth the later FW's you can adjust the modulation? frequency so you may need to upgrade the FW
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Thank you - definitely I need to look into how to update the firmware then.

OK I downloaded and installed the latest firmware, and am delighted to have the variable frequency feature for FM output.? Couple of questions....

1) Judging by the sound on an FM receiver, when I input lower modulation tones such as 123 Hz etc I am assuming it uses a square wave, since the overtones are quite prominent. Is that correct?
2) When going back and forth between the screens to change the frequency and modulation the unit quickly locks up and no longer is responsive, so I have to power cycle it.? Is that a typical behavior?

Hard to complain since this is such a powerful and inexpensive device, but would be reassuring to know my unit is "typical".

On Tue, Feb 2, 2021 at 01:15 PM, Bruce KX4AZ wrote:

1) Judging by the sound on an FM receiver, when I input lower modulation tones such as 123 Hz etc I am assuming it uses a square wave, since the overtones are quite prominent. Is that correct?

The modulation is actually an 8 step approximation of a sinus so yes, there are overtones.

2) When going back and forth between the screens to change the frequency and modulation the unit quickly locks up and no longer is responsive, so I have to power cycle it.? Is that a typical behavior?

This is a new bug introduced in the latest FW. I can reproduce it so I hope to solve it soon.

?
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