can i hook the xfinity x1 tv box to a tube tv?

Hi,

We just upgraded to 140+ channels & were sent a new X1 TV set box that I want to use on an old CRT tube TV.  Have completed the setup process and cannot get any channels below #187 (Hallmark).  In otherwords no ABC, CBS, NBC, Fox, SYFY, etc.  Have refreshed & restarted the X1, no help.

We are receiving gobs of channels above 187, starting with 666 (QVC-2) going into the 1,000's - or I should say they appear in the guide.  Nothing below 187 appears in the TV Guide 😞

Also I tried to change the device settings for video from 16:9, 720P  HD to 4:3 480i SD & even tho it looks like it's working it does not & the X1 remains on 16:9, 720P HD.  Don't know if that matters or not but I certainly don't expect to revcieve HD channels on that TV.

Thanks