In using the Spectrum Analyzer in a circuit simulation I learned that the 0dBm reference is 1mW in 600 ohms. This is approx. 0.775V . 0dBm in 50 ohm would be approx. 0.224V. Why is this using the 600 ohm system instead of 50 ohm in RF?

halkin · ‎04-18-2015

Why is the Spectrum Analyzer set up for 0dBm in 600 ohms instead of 50 ohms?

chaka1234 · ‎04-23-2015

Morning halking,

This is a known issue. According to our R+D department, our spectrum analyzer has infinite input impedance. This makes it act as more of a generic "frequency analyzer" tool rather than a typical Spectrum Analyzer instrument.

However, I'd recommend you to post your idea in the NI Exchange Idea in order to ask the interchangeable load feature.

Regards,

Carmen C.

Multisim and Ultiboard

In using the Spectrum Analyzer in a circuit simulation I learned that the 0dBm reference is 1mW in 600 ohms. This is approx. 0.775V . 0dBm in 50 ohm would be approx. 0.224V. Why is this using the 600 ohm system instead of 50 ohm in RF?

In using the Spectrum Analyzer in a circuit simulation I learned that the 0dBm reference is 1mW in 600 ohms. This is approx. 0.775V . 0dBm in 50 ohm would be approx. 0.224V. Why is this using the 600 ohm system instead of 50 ohm in RF?

Re: In using the Spectrum Analyzer in a circuit simulation I learned that the 0dBm reference is 1mW in 600 ohms. This is approx. 0.775V . 0dBm in 50 ohm would be approx. 0.224V. Why is this using the 600 ohm system instead of 50 ohm in RF?