power level at the input of a TV tuner or radio receiv [hlp]
时间：04-11
整理：3721RD
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Hello everyone;
I have a question:
What is the power level at the input of a TV VHF/UHF tuner and/or a radio receiver? Please introduce me any book/paper/link.
I have a question:
What is the power level at the input of a TV VHF/UHF tuner and/or a radio receiver? Please introduce me any book/paper/link.
Input power level is not a constant. TV and FM receivers are build for wide dinamic range of input signal level.
Usual minimum antenna level for TV is about 40dBμ and can be as high as 10mV on 75 ohm.
FM receivers have sensitivity about 2μV for mono reception and 50μV for stereo.
On cable TV antenna level is about 60dBμ or more.
Hello Borber;
What is dBu? Can you express your units in dBm?
dBμ is logarithm of voltage ratio in respect to 1μV. Conversion between is approximately 0dBμ=-107dBm.
AdBμ=20*log(V/1μV)