regulator noise

How to estimate the effect of regulator noise?
For example a CATV outdoor amplifier. The signal is 256QAM, the amplifier part is hybrid amplifier module, the regulator in the amplifier is LM7824. LM7824 noise 100Hz to 100KHz is 10uV/Vo.
Whether the regulator LM7824 is good enough for this application?

Thanks.

Often, for a linear power supply, the amount of ripple is greather problem than noise. Ripple is few mV while noise is uV.
A weel desgned LM723 based power supply has less noise and larger line suppression than 7824.

Thanks

But the circuit need 300mA at least.