Lectrosonics DM84 Reference Manual page 40

DM84 Digital Matrix Processor
Name
Programmable inputs notebook • Momentary Mute Inputs (MMI) This function momentarily mutes one or more audio inputs
Programmable input status indicators
Rear panel input gain controls
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Description
in response to a contact closure. The channel is muted when the contact closure is made,
and unmuted when it is broken. Normally used with a momentary contact switch, either a
"push to mute" or a "push to talk" action can be supported (depending on whether a
normally open or normally closed switch is used). This function can be applied to any
combination of audio input channels.
• Momentary Mute Outputs (MMO) This function momentarily mutes one or more audio
outputs in response to a contact closure. The channel is muted when the contact closure is
made, and unmuted when it is broken. Normally used with a momentary contact switch,
either a "push to mute" or a "push to talk" action can be supported (depending on whether
a normally open or normally closed switch is used). This function can be applied to any
combination of audio output channels.
• Momentary Mute Crosspoints (MMX) This function momentarily mutes one or more audio
outputs in response to a contact closure. The channel is muted when the contact closure is
made, and unmuted when it is broken. Normally used with a momentary contact switch,
either a "push to mute" or a "push to talk" action can be supported (depending on whether
a normally open or normally closed switch is used). This function can be applied to any
combination of matrix crosspoints associated with one particular audio input channel.
• Run a Macro on Close (RM) This function initiates the running of a macro in response to a
contact closure. This is normally used with a momentary contact switch, and can be applied
to any one of the macros stored in the DM84 memory.
• Run a Macro on Close/Open (RM2) This function initiates the running of a macro in
response to a contact closure, and another macro in response to the subsequent contact
opening. This is normally used with a momentary contact switch, and can be applied to any
two of the macros stored in the DM84 memory.
• Momentary Unmute Inputs (PTT) This function momentarily unmutes one or more audio
inputs in response to a contact closure. The channel is unmuted when the contact closure
is made, and muted when it is broken. Normally used with a momentary contact switch,
either a "push to talk" or a "push to mute" action can be supported (depending on whether
a normally open or normally closed switch is used). This function can be applied to any
combination of audio input channels.
When certain functions have been selected and the control panel is connected to a DM84,
the Test button is enabled. Pressing this button simulates a contact closure on the program-
mable input and is very useful for testing the function.
These display the status of the corresponding programmable input when a function has been
assigned and the control panel is connected to a DM84. For the Analog Gain Control functions,
the indicator is lit red when the voltage applied to the input is in the upper half of the allowable 0
to 5VDC range. For all other functions, the indicator is lit red when a contact closure occurs.
These are used to set up rear panel gain control for input channels. This operates as an
attenuator, adjustable from some minimum gain (max attenuation) up to 0dB (no attenuation).
There are two parameters:
• The gain preset value establishes the starting point for rear panel gain control on system
powerup. This normally used to select a gain point somewhere in the middle of the adjust-
ment range. The user may then adjust gain up or down from there.
• The minimum gain value establishes the bottom end of the rear panel gain control range.
The group consists of these numerical controls and indicators:
• Gain Preset - The gain preset value is displayed here and can be adjusted from -30dB to
0dB, or set to "Off". There are two ways to change the value:
• Click on the buttons next to the control to run the value up or down
• Type a value directly into the control and press ENTER
• Min Gain - The mimimum gain value is displayed here and can be adjusted from "Off" up
to the gain preset value. This value tracks the gain preset value and is automatically
adjusted as required to satisfy the rule:
minimum gain <= gain preset
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