RAD26 Output Block

UI Element	Purpose
Input node	Connection point for wiring the input to the block
Amp Output (Channel 1)	The amp output channel connected to the corresponding RAD port on the HAL
Line Output (Channel 3)	The line output channel connected to the corresponding RAD port on the HAL
Headphone Output (Channel 5)	The headphone output channel connected to the corresponding RAD port on the HAL

UI Element	Purpose
Gain (Manual and Linkable Control)	Gain (both a manual and linkable control) sets the volume of all three RAD26 audio outputs. Also specified is the volume range with a Minimum and Maximum value. Change the volume by adjusting the slider or entering a dB value in the edit box. Provide end users with control over the volume by linking this Level Control to the Level Control of a DR1 or DR3. Change the range by clicking the Minimum or Maximum value and then typing new values in the edit box that appears. The meter displays signal data for the block output. Default Gain = 0.0 dB; Default Minimum = -33.0; Default Maximum = 12.0
Off @ Min Checkbox	When checked, causes the audio to mute completely when dialed to the lowest end of its range.
Invert	When checked, inverts the signal polarity.
Limiter Active	The RAD26 limiter is a peak limiter that monitors the peak amplifier output current and prevents the RAD26 from exceeding the power limits of the RPI – Remote Power Injector, which supplies the power. This prevents the RAD26 from powering off due to exceeding the current delivery capability into current-hungry low impedance load, high voltage abuse. Limiter Active is lit (red) when the amplifier output is connected to a loudspeaker load of less than 8 Ω AND the RMS output level is approaching the RAD26’s maximum. Under these conditions, the RAD26 limiter turns down the output level of only the amplifier (not the headphone, not the Line output) to maintain a maximum output power level of 8 total watts across BOTH amp channels.
Amp Mute (Manual and Linkable Control)	Mute BOTH channels of the block's amp output. Provide end users with a mute control for both amp outputs by linking this Toggle Control to the Toggle Control of a DR2, DR3, or Logic In port. note: The value for Amp Mute is always shared between both of the RAD26 output blocks.
Line Mute (Manual and Linkable Control)	Mute BOTH channels of the block's line output. Provide end users with a mute control for both line outputs by linking this Toggle Control to the Toggle Control of a DR2, DR3, or Logic In port. note: The value for Line Mute is shared between both of the RAD26 output blocks.
Headphone Mute (Manual and Linkable Control)	Mute BOTH channels of the block's headphone output. Provide end users with a mute control for both headphone outputs by linking this Toggle Control to the Toggle Control of a DR2, DR3, or Logic In port. note: The value for Headphone Mute is shared between both of the RAD26 output blocks.
Mute (Manual and Linkable Control)	Mute the block's output without changing the Gain value. When the block is muted no audio passes regardless of the mute state of the individual Amp, Line, and Headphone mutes. Provide end users with output mute control by linking this Toggle Control to the Toggle Control of a DR2, DR3, or Logic In port. note: Unlike the individual RAD26 output mute controls that are each “locked” together in pairs (in “stereo” if you will), this Mute is only for one of the two audio channels sent to the RAD26. Since this single audio channel is sent to all three RAD26 outputs (amp, line & headphone), muting this control mutes all three “left” outputs (e.g., the odd-numbered RAD26 output channels); or for the second Amp/Aux Output block, all three “right” or even channels are muted.

Gain (Manual and Linkable Control)

Gain (both a manual and linkable control) sets the volume of all three RAD26 audio outputs. Also specified is the volume range with a Minimum and Maximum value. Change the volume by adjusting the slider or entering a dB value in the edit box. Provide end users with control over the volume by linking this Level Control to the Level Control of a DR1 or DR3. Change the range by clicking the Minimum or Maximum value and then typing new values in the edit box that appears. The meter displays signal data for the block output.

Default Gain = 0.0 dB; Default Minimum = -33.0; Default Maximum = 12.0

Off @ Min Checkbox

When checked, causes the audio to mute completely when dialed to the lowest end of its range.

Invert

When checked, inverts the signal polarity.

Limiter Active

The RAD26 limiter is a peak limiter that monitors the peak amplifier output current and prevents the RAD26 from exceeding the power limits of the RPI – Remote Power Injector, which supplies the power. This prevents the RAD26 from powering off due to exceeding the current delivery capability into current-hungry low impedance load, high voltage abuse. Limiter Active is lit (red) when the amplifier output is connected to a loudspeaker load of less than 8 Ω AND the RMS output level is approaching the RAD26’s maximum. Under these conditions, the RAD26 limiter turns down the output level of only the amplifier (not the headphone, not the Line output) to maintain a maximum output power level of 8 total watts across BOTH amp channels.

Amp Mute (Manual and Linkable Control)

Mute BOTH channels of the block's amp output.

Provide end users with a mute control for both amp outputs by linking this Toggle Control to the Toggle Control of a DR2, DR3, or Logic In port.

note: The value for Amp Mute is always shared between both of the RAD26 output blocks.

Line Mute (Manual and Linkable Control)

Mute BOTH channels of the block's line output.

Provide end users with a mute control for both line outputs by linking this Toggle Control to the Toggle Control of a DR2, DR3, or Logic In port.

note: The value for Line Mute is shared between both of the RAD26 output blocks.

Headphone Mute (Manual and Linkable Control)

Mute BOTH channels of the block's headphone output.

Provide end users with a mute control for both headphone outputs by linking this Toggle Control to the Toggle Control of a DR2, DR3, or Logic In port.

note: The value for Headphone Mute is shared between both of the RAD26 output blocks.

Mute (Manual and Linkable Control)

Mute the block's output without changing the Gain value. When the block is muted no audio passes regardless of the mute state of the individual Amp, Line, and Headphone mutes.

Provide end users with output mute control by linking this Toggle Control to the Toggle Control of a DR2, DR3, or Logic In port.

note: Unlike the individual RAD26 output mute controls that are each “locked” together in pairs (in “stereo” if you will), this Mute is only for one of the two audio channels sent to the RAD26. Since this single audio channel is sent to all three RAD26 outputs (amp, line & headphone), muting this control mutes all three “left” outputs (e.g., the odd-numbered RAD26 output channels); or for the second Amp/Aux Output block, all three “right” or even channels are muted.