ATTO Technology 463-248-202 manual Controls and Indicators, Terminals and Connectors

The following items describe all control and indicator functions illustrated in figure 2-1:

Table 2-1. Controls and Indicators, Terminals and Connectors

1.AC Power in: 100-250VAC, 50/60 Hz, 1 amp (AmpliCenter is self-switching.)

2.0dBm out, an auxiliary output that differs from the main 70.7V output in that it is a low level (0dB), 600 ohm balanced output used for driving a remote or off-premises amplifier

3.DC Power, and 70V audio out to Controller

4.Bass control screw-type adjustment pot. Attenuates low frequencies so that horns and small speakers are not overdriven by excessive bass energy. Cut-off frequency is adjustable from 50 Hz (full CCU) to 400 Hz (full CU)

5.Music In: left and/or right channels with ground;

Paging In: redundant paging input (ground, C1, tip, and ring)

70V Out: Balanced output used for terminating the loudspeaker wiring

6.Screw-type pots: VOX sensitivity level, Music ducking (mute level for music during voice page), Music level for various music sources

7.LEDs: green - power on, lights when AC line voltage is applied to AmpliCenter

red – overload, lights when the AmpliCenter output exceeds its output power rating.

This can occur when total speaker load is greater than the output rating, or when speaker wiring is shorted

red - unbalanced output, indicates when one speaker lead is accidentally shorted to ground green – page accessed, lights when voice paging is active

8.Telephone system mode switch: dry loop 600 ohms, dry loop Hi Z, ground start, and loop start

9.From host telephone system or Controller RJ11 connector paging audio and control

2-4Hardware Configuration