Hi I am trying to feed an old domestic radio receiver that has a 75 ohm input. My signal generator is 50 ohms output so I have built a 75 / 50 ohm matching pad with 9.6db anttenuation factor.
I want to feed the radio with 10uV impt signal at the antenna and I am trying to figure out the signal generator output level. Please could someone familiar with this check my math please.
10uV = -88.75dBm for a 75 Ohm System (from conversion table)
I have 9.6dB of loss in my matching pad so I set the output of my 50 ohm signal generator highe to make up for the loss = -88.75 + 9.6 = -79dBm
So in theory -79dbm at the output of the 50 ohm signal generator will provide 10uv at the output of the 75 ohm pad into my 75 ohm load
Thanks regards Chris