APB-DynaSonics ProDesk-4 Owner'S Manual Download Page 15

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ProDesk-4 OWNER’S MANUAL

MONO INPUT - MUTE, SOLO and LEVEL CONTROL

Mute Switch (Local) - Internally Illuminated

Activation of this latching switch will mute the primary outputs as well as all pre and post fader
auxiliary sends of the channel. When depressed, it will illuminate RED, indicating the status of this local
mute only; an additional LED (located along the fader track) indicates the status of any remote
activated mutes. Activation of either mute system (local or remote) will not affect the channel's
metering or the PFL signals; these are both located Pre-Fader/Pre-Mute. The mute system may affect
the Direct Out signal depending on its option setting. See the Rear Panel description for more
information.

Channel Level Meter

This 6-segment LED meter indicates the Pre-fader channel level; the “0” LED indicates approx. +4dBu
signal level (the design-level for the channel). Four green LED segments indicate Pre-fader levels of
Signal Present, -12dB, -6dB and 0dB. The signal present LED first illuminates at approximately –30dB
and increases in brightness with level until it is at full intensity. Best operation is achieved when all the
green LEDs are illuminated with average input signals with occasional short yellow/red bursts of the
+8 and peak LEDs. A yellow LED illuminates in the caution zone at +8dB above the reference level. The
top segment peak indicator will illuminate Red if any of the multiple sample points in the channel’s
signal path approach within 3dB of clipping.

Please Note:

The overall channel meter should be considered as 2 separate monitoring indicators: the

Green and Yellow LEDs are Average responding and show the Pre-fader level ONLY; the faster Red
LED is monitoring the pre-fader signal AND the Preamp and Post-fader signals. So, it is possible to
have the Red LED illuminate without first having the Yellow LED lit. This usually will be caused by
excessive preamp levels (and a subsequent cut in the EQ), or there may be a compressor or limiter in
the channel’s insert part that is attenuating the Pre-fader signal (Green & Yellow LEDs), but the preamp
signal feeding the compressor is approaching clipping. The usual cure is to turn down the channel’s
Gain control.

Mute Group Preset Switches 1 thru 4

When any of these switches are selected, the input channel will mute when the associated Mute
Group switch within the Master section is depressed. Activation of a Remote mute affects the channel
the same way as a Local Mute.

Remote Mute (R Mute) Activated LED

This LED will illuminate (Red) when the channel is muted by any of the 4 Mute Groups.

100mm Channel Fader

This fader adjusts the post-fader level of the channel. All bus assignments and all post-fader Aux sends
are controlled by this fader.

PFL (Solo) Switch - Internally Illuminated

This latching switch will illuminate yellow when activated. It will route the Pre-fader channel signal to
the Master section for display on the Master solo meters and into the monitor/headphone systems.
The channel feed to the Solo system is mono.