Slide 1 Slide 2 Slide 3 Slide 4 Slide 5 Slide 6 Slide 7 Slide 8 Slide 9 Product List
Slide7

On the transmit side, it can be assumed that there will be a strong signal at the fixed gain amplifier input with its own corresponding noise floor that will dominate the noise figure of the fixed gain amp. When the output attenuator is used for power adjustment, the signal and its own associated noise floor will adjust up and down together for a constant SNR. There may be noise floor degradation if the SNR of amplifier input is high enough that when the attenuator value is increased, the noise floor, already inherent in the signal, drops below the noise floor of the amplifier attenuator.

PTM Published on: 2016-10-05