Sceadwian
Full Member level 3
This is a multi disciplinary question so I hope it fits in the General Electronics forum.
I have a micro controller (Atmel AVR tiny15) which has a high speed internal PLL synthesizer which generates "flat out" a 12.8mhz signal on an I/O line. I personally have no method of viewing the waveform this generates however I do have a friend that has a 100mhz DSO that he's agreed to test the chip on for me. I'm looking for recomendations on how to go about testing the I/O lines output impedance, both resistive at DC and it's general admitance at various frequencies (the primary one of interest would be 12.8mhz of course) I was hopeing the folks here would be able to give some recommendations for how to go about testing that. DC first and then AC starting at 100khz and going up a few megahertz till I reach the 12.8 max. The eventual load is in theory going to be around 70ohms (halfwave dipole) Any help or online reading refrences would be appreciated.
I have a micro controller (Atmel AVR tiny15) which has a high speed internal PLL synthesizer which generates "flat out" a 12.8mhz signal on an I/O line. I personally have no method of viewing the waveform this generates however I do have a friend that has a 100mhz DSO that he's agreed to test the chip on for me. I'm looking for recomendations on how to go about testing the I/O lines output impedance, both resistive at DC and it's general admitance at various frequencies (the primary one of interest would be 12.8mhz of course) I was hopeing the folks here would be able to give some recommendations for how to go about testing that. DC first and then AC starting at 100khz and going up a few megahertz till I reach the 12.8 max. The eventual load is in theory going to be around 70ohms (halfwave dipole) Any help or online reading refrences would be appreciated.
