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A bit of a surprise...

A project log for Simple Digital Mode Transmitter

A low-power, all-digital transmitter.

RobGRobG 06/11/2021 at 18:390 Comments

I finally got into the office today and had a chance to put the transmitter on the bench. First job was to swap out the filter components - though actually the new filter isn't that great either (the roll off needs to be steeper) so I might change it again one day...

Output power measured on spec. an. (CW swept over 1-60MHz, max hold on)

But the next thing was to measure the output power: a measly -2dBm! Barely 0.5mW! And that's after I changed Rset for a 2kohm to increase the output power. No wonder I'm struggling to get the signal out...

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