Extron electronic RAC 104 user manual Resetting the RAC, Locking the front panel, Cancelling a tie

For example, if the treble on channel 1 is set to 6 and the treble on channel 2 is set to 10, the unit will change channel 2’s treble setting to 6 when the user ties them together.

	Channel 1	Channel 2
Treble before tie:	6	10
Treble after tie:	6	6

Volume, bass, treble, and mute adjustments can now be made to both channels simultaneously. The user can continue to adjust the gain settings independently using the SIS or the Windows-based control program via the RS-232 connector (see chapter 3 for more information).

Ties can also be made using the SIS or the Windows-based control program (see chapter 3 for more information).

Cancelling a tie

To cancel a tie, press and release the channel selector button again so that only one channel selector LED is on, then turn the knob.

Ties can also be cancelled using the SIS or the Windows-based control program (see chapter 3 for more information).

Resetting the RAC 104

To return the RAC 104 to its default settings, press and hold the adjustment selector button for 10 seconds. All the LEDs will light and then turn off. The default settings are:

Volume	70 (-30 dB)
Gain	0 dB
Bass	7 (0 dB)
Treble	7 (0 dB)

Any volume and tone limits are cancelled (see chapter 3 for information on limits).

The unit can also be reset using the SIS or the Windows-based control program (see chapter 3 for more information).

Locking the front panel

To prevent accidental changes to the controller settings, the front panel controls can be locked using one of two executive modes. The user turns the executive modes on and off using either the SIS or the Windows-based control program via the RS-232 connector (see chapter 3 for more information).

If the user presses a front panel button that is locked, the LED corresponding to that button flashes three times.

RAC 104 • Installation and Operation 2-11