Yamaha MTX Series Setup Manual page 128

5.
When you've finished setting the device's [UNIT ID] rotary switch and DIP switch, click
[Next>].
6.
Verify that the devices are shown in the screen, and click [Next>].
7.
Set the number of PGX1 units to 1.
Example 5) A system using the PGM1 for paging
MTX Setup Manual
128