IF Bandwidth setting / dBm accuracy in measurements
IF Bandwidth setting / dBm accuracy in measurements
I want to measure the accuracy of an unknown noise source from 15 - 25 MHz. (I have several I need to measure).
As a test, I have a known calibrated noise source of 68 MK @ 20 MHz. This gives me 9.4E-10 mW, and a calculated dBm of -90.3. I've tried every combination of settings but the closest measurement I can get my settings is -87.3 dBm. That is a pretty big difference between -90.3 dBm and -87.3 dBm (a 3 dB difference). Either my settings are incorrect, or the SA is not as accurate as I need it to be. I'm thinking that my IF bandwidth is not set correctly, or, I don't know for sure what number IS the IF bandwidth for my calculations.
As a test, I have a known calibrated noise source of 68 MK @ 20 MHz. This gives me 9.4E-10 mW, and a calculated dBm of -90.3. I've tried every combination of settings but the closest measurement I can get my settings is -87.3 dBm. That is a pretty big difference between -90.3 dBm and -87.3 dBm (a 3 dB difference). Either my settings are incorrect, or the SA is not as accurate as I need it to be. I'm thinking that my IF bandwidth is not set correctly, or, I don't know for sure what number IS the IF bandwidth for my calculations.
Reason: No reason
Re: IF Bandwidth setting / dBm accuracy in measurements
WHY DID YOU OPEN ANOTHER THREAD? IS THE FIRST ONE NOT ENOUGH?
Reason: No reason
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Re: IF Bandwidth setting / dBm accuracy in measurements
Please refer to your original thread. I posted a reply there.
Steve
Steve
Reason: No reason