FAC-ID: 9617

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DTV-LIC: Granted	Channel 12  CHICAGO, IL
	0000249867 (25076ff3905469b40190978405163e97) - App 0000263393 (25076f9193dc1c7201942ccf316d5e0f) - App
	1642' 29.5 kW ND (H) (6.93 kW + 6.29 dB gain = 29.5 kW ERP) 72.1 mile contour / 16351.1 sq. mi. area / Est. Pop. 10,495,340 1636' AGL; 2231' AMSL; (1032960) 1° Elec Beam Tilt; Full Service Filter Harris TAD-5H NAD83: N 41° 52' 44", W 87° 38' 8" (41.878889, -87.635556) Willis Tower (IL)
DTX-LIC: Granted	Channel 12  CHICAGO, IL
	0000265226 (25076f91948a77fe01948aafa95d0484) - App 0000267301 (25076ff394cc109f0194d5f6ac5c1042) - App
	1522' 25.6 kW DA (H) (6.98 kW + 5.64 dB gain = 25.6 kW ERP) 63.2 mile contour / 12556 sq. mi. area / Est. Pop. 9,963,606 1519' AGL; 2114' AMSL; (1032959) Unknown or 0° Elec Beam Tilt; Full Service Filter [H-Pat] RCA TBF-2AH (SPECIAL) NAD83: N 41° 52' 44.1", W 87° 38' 10.2" (41.878917, -87.636167) Willis Tower (IL)
DTX-LIC: Granted	Channel 12  CHICAGO, IL
	0000265214 (25076f91948a77fe01948aa0c606026e) - App 0000270876 (25076ff394cc109f0194d5e598b30fd0) - App
	1370' 32 kW DA (E) (Vertical ERP: 25.6 kW) (9.2 kW + 5.41 dB gain = 32 kW ERP) 64.3 mile contour / 13006.6 sq. mi. area / Est. Pop. 9,936,930 1367' AGL; 1960' AMSL; (1009012) 2° Elec Beam Tilt; Full Service Filter [H-Pat] Dielectric TLS-V4M/VP-R NAD83: N 41° 53' 56.1", W 87° 37' 23.2" (41.898917, -87.623111) John Hancock Tower (IL)
DTV-CP: Granted	Channel 12  CHICAGO, IL
	0000284580 (25076ff39ae65435019affcc2ab9125b) - App - (Exp. 12/16/2028)
	1611' 31 kW ND (C) (Vertical ERP: 31 kW) 72.1 mile contour / 16345.5 sq. mi. area / Est. Pop. 10,495,571 1605' AGL; 2200' AMSL; (1032960) 1.15° Elec Beam Tilt; Full Service Filter Dielectric DCBR-O3-5/15HB-1 NAD83: N 41° 52' 44", W 87° 38' 8" (41.878889, -87.635556) Willis Tower (IL)

  TSID: 999 (0x03E7)

  RENDER Data: HTML Export (09/15/2025)   
  Bitrate Allocation: Variable

Digital Channel	Display Channel	Call Sign	Src ID	PMT PID	Video	Dimensions	Aspect Ratio	Video PID	Video (Mbps)	PCR PID	Audio Type	Audio PID	Audio Bitrate
12.1	02-1	WBBM-NG	1	0x0030	1080p	1920x1080	16:9	0x0031	0Mbps	0x0031	DD5.1	0x0034	192kbps
12.2	05-1	WMAQ-NG	2	0x0040	1080p	1920x1080	16:9	0x0041	0Mbps	0x0041	DD5.1	0x0044	192kbps
12.3	66-1	WGBO-NG	3	0x0050	1080p	1920x1080	16:9	0x0051	0Mbps	0x0051	DD5.1	0x0054	192kbps
12.4	32-1	WFLD-NG	4	0x0060	1080p	1920x1080	16:9	0x0061	0Mbps	0x0061	DD5.1	0x0064	192kbps
12.5	09-1	WGN-NG	5	0x0070	1080p	1920x1080	16:9	0x0071	0Mbps	0x0071	DD5.1	0x0074	192kbps

Operator:	CBS Corporation
Licensee:	CBS BROADCASTING INC.
DTV Transition:
Certification :	Analog channel 2. Digital channel 3.
Elected Round 1  :	Negotiated for channel 11 with fallback to channel 3 if agreement was disapproved. (Approved)
Conflict Round 1  :	Maintained by engineering statement. (Approved)
Final Channel :	Channel 12.
Last Analog:
Channel 2  :	1490' 26.4 kW ND

Call Sign History:
00/00/0000	WBBM	World's Best Battery Maker
08/28/1979	WBBM-TV	World's Best Battery Maker
(01/26/2024)	WBBM-TV
(11/07/2024)	WBBM-TV
(01/28/2025)	WBBM-TV

Station has no translators.