Re: #firmware #i2c #smeter #ubitx #calibration #ubitx #firmware #smeter #calibration #i2c

Vic WA4THR
 

Elecraft has (or used to have) a simple S-meter calibrator that put out a signal that was supposed to be S9 and was pretty inexpensive, if you really need to have accuracy. Then you could check it with another station adjusting their power remembering that each S-unit represents 4X the power (or double the voltage if you are measuring that). If it needs changing you will have to reprogram the second Nano. Having an S3 all the time is about right, that is typically the level of band noise. It should go to zero if the antenna is disconnected. As I said before, with the second Nano mine is agreeing pretty well with a commercial rig in the shack except for the timing as it is a bit slower to respond.

=Vic=

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