IF you are replacing the 501 with the 625, you really didn't need the 2 channel modulator - the 625 comes with a stereo UHF modulator for TV 2 already.
If you are using both channels on your new modulator, just don't hook up the TV2 RF output and you should be fine. Otehrwise , just make sure everything has 3-5 channels of space between NTSC sources.
If you are using both channels on your new modulator, just don't hook up the TV2 RF output and you should be fine. Otehrwise , just make sure everything has 3-5 channels of space between NTSC sources.
