Just got an old AIWA ST-9700 tunner. Very nice unit. In specifications it says about sensitivity: 50 dB Quieting sensitivity: stereo 35 + - 3 dB? I am used to uV; Can anyone tell how much is it in micro volts? And what is the meaning of Quieting?
Full quieting is when the maximum possible s/n is reached. The weakest signal for full quieting is the useful sensitivity.
Of course, FM stereo will require a much stronger signal strength than mono signals for the same quieting level,
around 20dB (X10) more. That "35" AIWA spec is the stereo signal strength in uV for 50dB quieting.
Sometimes a worse quieting level is used (as poor as 30dB s/n), which gives a weaker uV signal, and looks better in the specs.
https://www.rfcafe.com/references/p...uner-specs-popular-electronics-march-1973.htm
Of course, FM stereo will require a much stronger signal strength than mono signals for the same quieting level,
around 20dB (X10) more. That "35" AIWA spec is the stereo signal strength in uV for 50dB quieting.
Sometimes a worse quieting level is used (as poor as 30dB s/n), which gives a weaker uV signal, and looks better in the specs.
https://www.rfcafe.com/references/p...uner-specs-popular-electronics-march-1973.htm
Quieting is the reduction in noise level expressed in decibels when a signal of a given strength is introduced to the input of the tuner.
Typically a broadcast tuner should give a quieting level of 30 dB for an input level of around a microvolt.