Tvheadend

Good day to all I have been trying to scan my local channels useing tvheadend with no luck for two months ...I am useing a Hauppauge hvr 2250 card all drivers install with no errors ( how i know i use terminal then dmesg | grep saa7164 ) ...Now the ATSC tv card is working when i use WIN TV 7 software that came with the card useing (windows 7 pro 64bits) i have no problem i get all the seven channels in analog (also here is the freq of the seven channels ch2 83.50mhz ch3 187.50mhz ch4 205.50mhz ch5 471.50mhz ch6 495.50mhz ch7 537.50mhz ch8 561.50mhz ) when i use the US freq it's to far of scan to my freq ....Can someone who know's how to make a freq patch for tvheadend make one for my please thanking you in advance ...btw I'am useing ubuntu 18.04 with tvheadend....