In this approach, the signals from individual detector elements are digitized at each bunch crossing and the resulting data stored in a digital memory until the decision has been received from the LVL1 trigger. This has the advantage that the analog information is digitized immediately and therefore becomes immune to noise pick-up. The challenge for this approach is the serious demand placed on the speed of the digitizer while maintaining an acceptable power dissipation. Fortunately, the level of precision needed is only a fraction of the dynamic range, and therefore compression schemes can be used together with 10-bit or 11-bit ADCs.