Patent ID: 11930445
Assignee: ARRIS ENTERPRISES LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A modem, comprising:
a memory storing computer-readable instructions; and
a processor configured to execute the computer-readable instructions to:
simultaneously begin an orthogonal frequency-division multiplexing (OFDM) downstream (DS) channel scan in a foreground process and a single-carrier quadrature amplitude modulation (SC-QAM) DS channel scan in a background process;
store SC-QAM DS channels identified in the background process in a table;
determine whether an OFDM DS channel has been locked onto;
stop the SC-QAM DS channel scan in the background process and begin a normal SC-QAM DS channel scan based on a scan of all OFDM DS channels and failure to lock onto any OFDM DS channels;
scan SC-QAM DS channels in the table; and
become operational with an SC-QAM DS channel obtained from the table.