Trigon Dialog Owner's Manual page 9

(14) Display:
The display gives you information about the various operating states of the DIALOG.
It can be switched off with the DIRECTOR remote control. In this event it comes on
to show information only when you make a change.
(15) Volume Level:
This LED display shows the output volume in dB relative to the level of the input
signal. As long as a "minus" before the number, the output level is lower than the
input signal by that value. When the display is switched off from the DIRECTOR
remote control, the volume level will be displayed momentarily whenever a change is
made.
The display can be switched off in two stages. The first time the display button is
depressed, the display (14) is switched off with the volume level still showing. When
the display button is depressed a second time, the volume display (15) is turned off
as well. Pressing the display button again will re-activate the full display (14 and 15).
(16) Volume Control:
This knob adjusts the volume. An electronic pulse generator transmits its signals to
the microprocessor. The microprocessor in turn passes the corresponding command
to each output module. This is where the actual volume adjustment is done.
Depressing the volume button mutes the output. Instead of a numeric volume level
value only dots are displayed.
dB
Depressing the volume button again or turning the volume control cancels the MUTE
function. The previous volume setting is restored.
Another push on the knob or turning the volume knob lifts the mute function is turned
on and the previous volume level is restored.
(17) Power Indicator LED:
This LED lights up when the DIALOG is connected to the main power supply, with
AC mains power switched on (switch 8). When the Standby button (18) is depressed,
the LED flashes until the Dialog is powered up and ready for use.