Monitor Controller Owners Manual
Table Of Contents
- 1 Welcome
- 2 Important Safety Information
- 3 Safety Marking Symbols
- 4 Service Information
- 5 m905 features
- 7 Unpacking and Installing
- 8 Connecting the m905
- 9 Normal Operation Mode
- 10 Setup Mode
- 11 General Setup
- 12 ABOUT CROSS-FEED
- 13 Communication Error Handling
- 14 Computer Audio Setup
- 15 Updating Firmware
- 16 Specifications
- 17 Block Diagram
- 18 PCB Jumper Locations
- 19 Wiring Diagrams
- 20 Cleaning and Maintenance
- 21 Warranty Information
- 22 Manual Revisions
24
TALKBACK SETUP
From the setup screen, pressing the talkback button enters talkback setup mode. Once talkback setup
mode is active, pressing the talkback button will have the same function as it does in normal mode.
The m905 features a exible talkback system for communicating with the performers. Two dierent
talkback sources are available - 1) Built-in mic on the RCU and 2) external mic input on the ACU. Each
of these have independent controls and setup. When talkback is active, the talkback signal is summed
into the cue output. In addition, a dedicated balanced analog talkback output is available on the ACU
that allows the talkback signal to be routed to other systems. Talkback setup parameters are as follows:
RCU MIC GAIN This parameter sets the gain of the internal RCU talkback mic. The available range is 0dB to
+63dB in 1dB steps. The default is 0dB.
EXT. MIC GAIN This parameter sets the gain of the external ACU talkback mic. The available range is
+15dB to +70dB in 1dB steps with one gain setting of +7dB. The default is +7dB.
EXT. MIC PHANTOM POWER This parameter controls the +48V phantom power for the external ACU talk-
back mic. This should only be turned on when using an external microphone that requires +48V phantom
power. The available settings are o and +48V. The default is o.
TALKBACK ENABLE This parameter controls the dierent talkback modes. Available options are as follows:
• rcu or ext. mic – In this mode, the RCU talkback button enables the RCU talkback mic and the remote
talkback switch on the ACU enables the external talkback mic.
• rcu mic only - In this mode, either the RCU talkback button or the remote talkback switch on the ACU
enables the RCU talkback mic.
• ext. mic only - In this mode, either the RCU talkback button or the remote talkback switch on the ACU
enables the external ACU talkback mic.
• The default is rcu or ext. mic.
CONTROL MODE This parameter congures how the RCU talkback button and the remote talkback switch
on the ACU operate. Available options are as follows:
• momentary – talkback is enabled only when the switch is pressed and held (closed)
• latch – talkback is toggled with each press of the switch
• The default is momentary.
DIM ON TALKBACK This parameter controls how much the speaker / sub output attenuates when talkback
is active. Available range is -30dB to 0dB in 0.5dB steps. The default is -20dB.
Nifty fact: The Talkback output connector on the m905 comes congured such that it outputs the
talkback signal only when the talkback switch has been pressed. By moving J3 and J4 on the main pcb
inside the m905, the Talkback output connector can continously output the signal from the external
Talkback microphone amplier. This allows the user to utilize the external microphone input amplier
as a high quality stand-alone preamplier (!)
To set the Talkback output mode: Disconnect the m905 from its AC power by unplugging the AC power
cable. Use a #2 Phillips screwdriver to remove the top cover from the m905. There are 8 screws to re-
move on the top cover, 4 on the top and 2 on each side. Be careful to discharge any static electricity on
the outside of the chassis before touching any of the jumpers inside the m905. Refer to “Figure m905
Main PCB Jumper locations” page 40, to locate J3 and J4.
MUTE / (SOLO)