I’m confused by the specs for the 10 MHz reference for the B205mini. In kb.ettus.com/B200/B210/B200mini/B205mini#Timing_Reference_Input, and in the schematics, the minimum level is specified as 0/1.8V minimum and the maximum 0/5V. The limits are also given as 10 dBm to 27 dBm. 27 dBm into a 50 ohm load translates to 5Vrms, 7.07 V peak, 14.15 Vpp. 10 dBm translates to 0.7 Vrms, 0.99 Vpeak, 2.00 Vpp. A 17 dB difference in power (between 27 dBm and 10 dBm) indicates a voltage ratio of about 7. What am I getting wrong, please? Thanks. Dave

They’re not quoting RMS levels. Stick to a 3.3 to 5V square wave and you’re golden. Sent from my iPhone > On Jun 17, 2021, at 12:21 AM, dave_abel@bigpond.com wrote: > >  > I’m confused by the specs for the 10 MHz reference for the B205mini. > > In kb.ettus.com/B200/B210/B200mini/B205mini#Timing_Reference_Input, and in the schematics, the minimum level is specified as 0/1.8V minimum and the maximum 0/5V. The limits are also given as 10 dBm to 27 dBm. > > 27 dBm into a 50 ohm load translates to 5Vrms, 7.07 V peak, 14.15 Vpp. > > 10 dBm translates to 0.7 Vrms, 0.99 Vpeak, 2.00 Vpp. > > A 17 dB difference in power (between 27 dBm and 10 dBm) indicates a voltage ratio of about 7. > > What am I getting wrong, please? > > Thanks. > > Dave > > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-leave@lists.ettus.com