The hemispherical power asymmetry , observed in the CMBR data , has generally been interpreted in terms of the dipole modulation model for the temperature fluctuations .
Here we point out that this model leads to several predictions , which can be directly tested in the current data .
We suggest tests of the hemispherical power asymmetry both in real and multipole space .
We find a significant signal of the dipole modulation model in WMAP and PLANCK data with our tests .
The dipole amplitude and direction also agrees , within errors , with earlier results based on hemispherical analysis in multipole space .
We also find evidence that the effective dipole modulation amplitude increases with the multipole l in the range l = 2 - 64 .