Mackie SP2400 Instruction Manual - All - Page 17

Paging Mic Control The PAGING MIC CONTROL connector is provided to connect a manual paging switch. Connect a normally-open switch between GND and ZONE A (to page in Zone A only), GND and ZONE B (to page in Zone B only), or GND and ALL CALL (to page over the entire system). The voiceactivated (VOX) control for the Paging Mic still operates in both zones when the switch is off. Local Mic/Line Inputs Connect a microphone to MIC/LINE INPUT A or B (one for each zone), using the supplied Phoenix-type connector, to use for a meeting room or other local speaking requirements. Set the PHANTOM and GAIN +40dB switches to their appropriate positions. Select the OFF button on the front panel. This disengages the selected Program Source and engages the MIC/LINE INPUT. Adjust the MASTER VOLUME up/down buttons so the meter level is at the "0" mark. Note: The MASTER VOLUME setting for the MIC/LINE INPUTS is independent of the MASTER VOLUME setting for INPUTS 1-4. The MASTER VOLUME setting for INPUTS 1-4 is stored in memory when the MIC/LINE INPUT is selected (the OFF button is engaged). When an INPUT 1-4 is selected, the MASTER VOLUME setting for the MIC/LINE INPUT is stored in memory. Set the GAIN control so the meter indication is near the "0" mark when speaking at an average level into the microphone. Set the 2-band EQ (LOW and HIGH) to the "U" position. These can be adjusted later, if necessary. Ambient Mic Inputs This is an optional connection, but can greatly enhance the performance of the Paging Mic. Connect the optional MT-3100 mic to the AMBIENT MIC input (one for each zone). This provides an "ear" for the microprocessor to adjust the Paging Mic gain to compensate for the ambient noise level in the room. Use the supplied Phoenix-type connectors to make these connections. Note: Move the AMP ADDRESS switch #8 UP to enable the ambient mic. See page 20 for more information on "Using the Ambient Mic." Expansion In/Out If you are connecting two or more SP2400s in a system, use the EXPANSION IN/OUT connections to distribute the Program Input sources assigned to the Expansion Bus between SP2400s. The two 25pin D-Sub connectors are in parallel (use one to connect to the previous SP2400 and one to connect to the next SP2400 in the chain). REMOTE You can connect one or more optional remote controls (up to 10) to each zone on the SP2400 to provide wall-mounted input select, program signal volume control, and local mic volume control. RS485 A PC can be connected to the RS485 port to provide computer control for up to 16 SP2400s, interconnected via their RS485 ports, using the SPLinker Sound Palette Control software application. If the PC doesn't have an RS485 serial port, you can either install an RS485 interface card, or use an RS232 serial port with an RS232-to-RS485 converter. Two zones can be controlled with one wired remote control by connecting the RS485 ports between the two zones. (The RS485 ports are connected internally, so an external connection between the RS485 ports on a single SP2400 is not necessary.) Each amplifier must have the same AMP ADDRESS as the amp to which the remote control is connected, with one assigned as Master and the other as Slave. Use the supplied Phoenixtype connectors to make these connections. Note: Move the AMP ADDRESS switch #6 DOWN for Master and UP for Slave. PRE OUT/AMP IN These connections can be used to insert a signal processor (i.e., graphic equalizer, compressor, etc.) into the signal chain, or to feed the signal to additional power amplifiers. If no external processor or external amplifier is to be used, leave the U-shaped jumper in place between the PRE OUT and AMP IN connectors. OUTPUTS Use the supplied two-conductor Phoenix-type connectors with appropriate speaker wiring to connect to the speaker or distributed speaker system. SP2400 - 17