Author Topic: Attenuator for Tx Monitor output  (Read 2829 times)

RadioTop

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Attenuator for Tx Monitor output
« on: November 14, 2013, 11:49:37 am »
Despite your recommendation to prefer receiving by air, I intend to connect the Pira P175 to our FM transmitters. They offer a "Monitor RF" output labelled "-30dB". Max. RF power at the Tx output is 100 W. Sorry, I'm not good at dB-maths. What attenuator do I need not to damage the P175?

Jan

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Re: Attenuator for Tx Monitor output
« Reply #1 on: November 14, 2013, 12:33:31 pm »
For 100 W the -30 dB is 0.1 W. Thus it's preferred to use additional 20 dB attenuator so the resulting power is 1 mW. A 30 dB attenuator can be used as well.