rier ▁and ▁thus ▁it ▁used ▁to ▁be ▁common ▁that ▁the ▁audio ▁from ▁a ▁distant ▁TV ▁station ▁on ▁channel ▁E 2 ▁received ▁via ▁Sp or adic ▁E ▁inter fer es ▁with ▁Channel ▁A ▁video ▁and ▁vice ▁vers a . ▁ ▁Eastern ▁Europe ▁ ▁East ▁Germany ▁( once ▁DDR ) ▁In ▁it ▁is ▁very ▁early ▁days ▁D FF ▁made ▁some ▁test ▁transm issions ▁using ▁the ▁D / K ▁standard ▁( 6 . 5   M Hz ▁audio ) ▁before ▁rever ting ▁( around ▁ 1 9 5 7 ) ▁to ▁System ▁B / G ▁( 5 . 5   M Hz ▁audio ) ▁but ▁using ▁some ▁unique ▁frequencies ▁# ▁. ▁{ | ▁ ▁class =" wik itable " ▁ ▁| - ▁! ▁Channel ▁! Channel ▁Lim its ▁( M Hz ) ▁! V ision ▁Car rier ▁( M Hz ) ▁ ▁! Main ▁Sound ▁Car rier ▁( M Hz ) ▁ ▁| - ▁| 1 ▁( Pre ▁ 1 9 5 7 ) || <0x09> bg color = green | 4 1 . 0 0 ▁- ▁ 4 9 . 0 0 || <0x09> bg color = yellow | 4 1 . 7 5 || <0x09> bg color = red | 4 8 . 2 5 ▁ <0x09> || Ident ical ▁to ▁old ▁O IR ▁Ch ▁I ▁| - ▁| 2 ▁( Pre ▁ 1 9 5 7 ) || <0x09> bg color = green | 5 8 . 5 0 ▁- ▁ 6 6 . 5 0 ▁|| <0x09> bg color = yellow |