This read-write object controls the Rx descrambler state: off(0), on with the default descrambler type(1), or on with IESS-315 (Turbo only)(2). The descrambler must match whatever scrambling scheme the transmitting end applied, since satellite links typically scramble the bit stream to maintain sufficient bit transitions for clock recovery -- a mismatch here will prevent the demodulator from producing a coherent bit stream even if it's RF-locked. On a Turbo-coded link, an admin would set this to onIESS315(2) specifically because the IESS-315 standard descrambling is required to correctly interpret Turbo-coded frames from a compliant far-end transmitter.