Largered wrote:

dorsetfreelander wrote:

I think that the "digital" here is a reference to using a digital phase locked loop in the FM tuner ie its a bit of misleading marketing. My current 14 reg has DAB but I rarely use it as the signal where I live is patchy.

Leeson's expression for single-sideband (SSB) phase noise in dBc/Hz (decibels relative to output level per Hertz) is
L ( f m ) = 10 log ⁡ [ 1 2 ( [ f 0 2 Q l f m ] 2 + 1 ) ( f c f m + 1 ) ( F k T P s ) ] {\displaystyle L\left(f_{m}\right)=10\log \left[{\frac {1}{2}}\left(\left[{\frac {f_{0}}{2Q_{l}f_{m}}}\right]^{2}+1\right)\left({\frac {f_{c}}{f_{m}}}+1\right)\left({\frac {FkT}{P_{s}}}\right)\right]}

where f0 is the output frequency, Ql is the loaded Q, fm is the offset .........

I rest my case ......

Leeson's equation is an empirical expression that describes an oscillator's phase noise spectrum.
Leeson's expression for single-sideband (SSB) phase noise in dBc/Hz (decibels relative to output level per Hertz[not the car rental]) and augmented for flicker noise:
Q, fm is the offset from the output frequency (Hz), fc is the 1/f corner frequency, F is the noise factor of the amplifier, k is Boltzmann's constant in Joules/Kelvin, T is absolute temperature in Kelvins, and Ps is the output power.


ooops posted Kelvin twice tonight .......

i see

Last edited by SouthamFL2 on 22nd Feb 2019 4:48 am. Edited 1 time in total

Ps I still love my heated steering wheel that you can't afford ha ha ha

South, my L405 has it ........ but the salesman mis-sold it to me.

.

Given what you would have paid for it, I should hope so!

Well it is my six month 'winter' vehicle.