Troubleshooting > Problem - TV channel detected but no image displayed

Cause - Resolution from input device not supported by TV - The MOD300 outputs the same resolution as it receives.

For example, if the resolution from the original input device is 1080p the MOD300 will output a 1080p signal.

If the TV only supports a maximum of 720p the new channel will still be discovered but no image will be displayed.

In this case change the resolution of the input device to one which the TV supports.

Cause - RF level too high or too low - If the RF level is too high or low and the TV can not produce an image.

1. Adjust the RF out level in the MOD300, go to :-

Setup Modulator > RF out. See the Menu System - NOTE if the MOD300 is dBm level range is -31 dBm ~ 6 dBm

This can be adjusted on a trial and error process so you may have to try various RF levels checking the result each time.

It is recommended to adjust the dB level in segments of 3.

Re-tune the TVs after making the adjustment.

2. Check the RF output level of the MOD300 compared with the TV aerial signal using a digital TV (DVB-T) signal strength finder.

The TV may not be able to decode the MOD300 if there is a large difference in strength between the two signals.