▁fourth . ▁The ▁original ▁con cess ion aire ▁was ▁Radio ▁Pan amer icana , ▁S . A ., ▁making ▁it ▁a ▁direct ▁sister ▁station ▁to ▁X EQ ▁radio . ▁The ▁transmission ▁from ▁Pas o ▁de ▁Cort és ▁( C orte z ▁Pass ), ▁ ▁high , ▁was ▁said ▁to ▁make ▁channel ▁ 9 ▁the ▁world ' s ▁highest ▁television ▁station . ▁The ▁sign - on ▁of ▁X EQ - TV ▁was ▁the ▁first ▁step ▁in ▁the ▁development ▁of ▁a ▁national ▁relay ▁network , ▁reaching ▁an ▁additional ▁three ▁million ▁people . ▁Not ▁long ▁after , ▁Rom ulo ▁O ' F arr ill ▁built ▁his ▁own ▁relay ▁station ▁on ▁the ▁mountain , ▁X EX - TV . ▁The ▁establishment ▁of ▁X EQ ▁thus ▁led ▁to ▁Tele vis a ' s ▁massive ▁system ▁of ▁relay ▁stations ▁covering ▁most ▁of ▁Mexico . ▁ ▁In ▁ 1 9 8 5 , ▁X EX - TV ▁and ▁X EQ - TV ▁were ▁affected ▁by ▁a ▁series ▁of ▁moves ▁that ▁added ▁a ▁V H F ▁channel ▁to ▁the ▁Mexico ▁City ▁area . ▁Mexico ▁City ▁had ▁channel ▁ 8 , ▁then ▁known ▁as ▁X HT M - TV . ▁X HT M ▁moved ▁to ▁channel ▁ 9 , ▁taking ▁on ▁the ▁X EQ - TV ▁call sign . ▁A ▁new ▁television ▁station ▁was ▁placed ▁on ▁channel ▁ 7 , ▁I me vis ión ' s ▁X H IM T - TV . ▁To ▁accomplish ▁this ▁move , ▁X EX - TV ▁was ▁re located ▁to ▁channel ▁ 8 ▁and ▁X EQ