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3 Controlling ATOM Devices

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An ATOM Series device’s Mute State is controlled by one hardware input signal, four

user-controllable software parameters, and three fault indicators. ATOMControl monitors

the values of all of these and displays them in the Mute Tab of the User Interface.

The signals are:

 Mute Input:

The hardware input line corresponding to pin D of the MIL-C-

26482 control interface

 Mute Invert:

Determines which value of the Mute Input line represents

Mute and which value represents Unmute

 Mute Bias:

Determines the value of the Mute Input line if the hardware

input is left floating

 Mute Command:

Software mute setting

 Mute On Faults:

Indicates whether the device will be muted if a fault is

detected

Muting can thus be caused by three potential sources: a hardware-based mute triggered

through the Mute Input hardware signal, fault-based muting triggered by one of three

faults, and software-based muting triggered using the Mute Command parameter.

Software-based muting will override both fault-based muting and hardware-based

muting. Fault-based muting will also override hardware-based muting.

The hardware signal, four software parameters, and three faults interact with each other

to produce the overall Mute State in one of two ways. While most devices will use the

Standard Mute Logic shown in Figure 4, some 100W devices (running firmware version

1.1.0.1 or higher) will use the Revised Mute Logic shown in Figure 5.

Figure 4: Standard Mute State Logic

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