SYNC I/O can be reset to its default factory settings. To reset all parameters to default settings:
1 Switch off power to SYNC I/O and wait at least 10 seconds.
2 Hold down the Up and Down front panel switches and turn on power to SYNC I/O ? do not release the Up and Down switches until the display reads FAC-CFG. Resetting factory settings does not reset the SYNC I/O oscillator.