Why Ec/Io is always negative

Pilot channel power or Ec is always less than the Total Cell Power, the ratio of the Pilot power (Ec) to the Total Cell power (Io) is always less than one.

Thus, when measured in Decibels,the value of Ec/Io is always negative.

Here is the calculation.

Ec = Pilot Channel Power or Effect Energy Channel
Io = Total Energy and Noise.

Ec/Io = 10.log [Pilot Channel Power / (Total Energy with Noise)] < 10.log(1) = 0

so Ec/Io always negative