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RMS or P-P Voltage for modulation alignment
- Thread starter Realred
- Start date
Good question. I have worked with radios that specify either P-P or RMS. And many that don't specify at all. And not all radios require the same level.
In practice, I always start with 50mV P-P (35mV RMS) and go up and down from there to see where the input level is happy. I will always check the manual if I have the information in front of me, but it's not usually that critical when you are in the ballpark. 8 out of 10 times, 50mV P-P does the job nicely. But as is the case with these things, YMMV.
When it comes to 2-tone SSB tests, the variance can be even wider and you will be up and down with both tone levels, to balance the pips (TOI/IMD tests). Again, it all depends on how the DUT is performing at the time. The info in the book is a starting point.
73
In practice, I always start with 50mV P-P (35mV RMS) and go up and down from there to see where the input level is happy. I will always check the manual if I have the information in front of me, but it's not usually that critical when you are in the ballpark. 8 out of 10 times, 50mV P-P does the job nicely. But as is the case with these things, YMMV.
When it comes to 2-tone SSB tests, the variance can be even wider and you will be up and down with both tone levels, to balance the pips (TOI/IMD tests). Again, it all depends on how the DUT is performing at the time. The info in the book is a starting point.
73
