User manual

(4.0E) 2-7

IMPORTANT!

Switches 3 to 5 - SPKR (SPEAKER)

Switches 3 to 5 configure the controller for specific loudspeaker

types. The switch positions are listed on the configuration sticker at

the rear of the device. Refer to the chapters on the individual

loudspeaker systems for more details on the various modes.

Switch 6 - LO IMP

If LO IMP is selected, the speaker output of the E-PAC is set for

driving low-impedance loads. Gain and the maximum output

voltage is then reduced by half (–6 dB) so that the E-PAC can

drive loads at a nominal 4 to 8 ohms at lower power. For example

in LO IMP mode four E3 speakers can be operated.

Switch 7 - REMOTE

An E-PAC's power (on/off) and error status can be monitored by

connection to a Remote Interface Bridge, RIB. Detailed display of

the local settings and status can be read when a RIB is used in

conjunction with a PC running ROPE control software.

Selecting the E-PAC REMOTE switch enables a RIB to control the E-

PAC configuration and power status. The RIB/ROPE combination

can be used to disable the E-PAC from local control, and allow

remote setting of DIP Switches 1-6, DIP Switch 8 and the associated

delay function, level control and the Mute/Standby switch.

If the link to a RIB is disconnected with the REMOTE switch

selected, the E-PAC will switch off.

Switch 8 - DELAY ON

The E-PAC Version 2 has a programmable internal delay function

for setting delay times up to 170 ms. The step widths are in units of

0.1 ms and are set using the RIB in conjunction with a PC running

ROPE control software. To programme the delay time switch 8,

DELAY ON, is selected. This can be either manually or, when local

operation is disabled, via the ROPE control software.

Any delay programmed into an E-PAC will be retained in the

internal memory after the link to the RIB is disconnected. This

enables a delay time for a particular application to be pre-

programmed into the memory of an E-PAC and accessed by

simply selecting the DELAY ON switch. To override the delay,

switch 8 is deselected.

In the standard operational mode with no internal delay selected,

all versions of the E-PAC introduce a processing delay of 0.7 ms

into the signal path.

If the E-PAC is operated without remote control and it has not

been pre-programmed with a delay time for a specific application,

the delay function should be disabled by deselecting DIP switch 8

on the rear panel.