Madison, Wisconsin FM Spectrum

Frequency Air Cable
109.2725   Channel A-2 Video Carrier
108.0   Channel A-2 Lower Boundary
107.9    
107.7   TV Audio from MTV
107.5    
107.3 WSJY  
107.1    
106.9    
106.7    
106.5    
106.3    
106.1    
105.9 WWQM WWQM
105.7    
105.5 WMMM  
105.3    
105.1 WYZM  
104.9    
104.7    
104.5   WZEE
104.3    
104.1 WZEE  
103.9    
103.7   WMMM
103.5    
103.3   WYZM
103.1    
102.9    
102.7    
102.5 WNWC WNWC
102.3    
102.1   SUPER AUDIO CLASSIC HITS
101.9    
101.7    
101.5 WIBA-FM  
101.3    
101.1   WIBA
100.9    
100.7    
100.5 WYKY  
100.3    
100.1   WXJ-87 (Madison Weather Radio)
99.9    
99.7    
99.5    
99.3   Television Audio from The Nashville Network
99.1    
98.9   WFMT (Chicago)
98.7    
98.5   WMGN
98.3    
98.1 WMGN  
97.9    
97.7    
97.5   Television Audio from SHOWTIME
97.3    
97.1   SUPER AUDIO COUNTRY
96.9    
96.7 WMLI  
96.5    
96.3 WMXF  
96.1   WMLI
95.9    
95.7   SUPER AUDIO NEW AGE JAZZ
95.5    
95.3   SUPER AUDIO LIGHT'N LIVELY
95.1    
94.9 WOLX  
94.7    
94.5   WOLX
94.3    
94.1 WJJO  
93.9    
93.7   WJJO
93.5    
93.3    
93.1    
92.9   SUPER AUDIO BUSINESS RADIO
92.7    
92.5   WMAD
92.3    
92.1 WMAD-FM  
91.9    
91.7 WARP (Madison Student Radio) SUPER AUDIO IN TOUCH
91.5    
91.3   SUPER AUDIO CLASSICAL COLLECTION
91.1    
90.9   SUPER AUDIO SOFT SOUNDS
90.7    
90.5   Television Audio from HBO
90.3    
90.1    
89.9 WORT  
89.7    
89.5   WORT
89.3    
89.1   WERN
88.9    
88.7 WERN  
88.5    
88.3    
88.1    
88.0   Channel 6 Upper Boundary
87.75   Channel 6 Audio Carrier

FM Radio Spectrum Allocation

While the cable system has a high level of shield integrity, many FM tuners, receivers and radios suffer from Direct Pickup Interference (DPI), a condition where over the air signals received on the antenna connection interfere with signals received over the cable, causing interference or multipath distortion. The solution is to offset the frequencies of local FM signals from their licensed frequency. This means that the air frequencies need to be left unused, because any other signal at that frequency will receive interference.

Further, many FM receivers are unable to seperate stations closer than 0.4 mhz, so at least one blank "channel" needs to be left between any two channels.

11/18/96 by David Devereaux-Weber djdevere@doit.wisc.edu