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

Claim 6:
7. A method for identifying operational downstream channels, comprising:
simultaneously beginning 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;
storing SC-QAM DS channels identified in the background process in a table;
determining no OFDM DS channels locked onto;
stopping the SC-QAM DS channel scan in the background process and beginning 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;
scanning SC-QAM DS channels in the table; and
becoming operational with SC-QAM DS channel obtained from the table.