Re: OT2 ProtoC - Tuning
> Best thing for the RX (TUNE) adjustment is to feed it an alternatingtest CD.
> 1200/2200 hz tone. You can get that from a TNC or from the APRS
> Then check the duty cycle on pin 7 of the NJM2211 and tune for 50%.Cool. With the loop back connector and CALIBRATE ALT, this was easy.