Sonifex AVN-MPPR, Handbook

Page: 17 / 48

9
AVN-MPPR Presenter Remote Unit 3
Metering Mode
Fig 3-2B: AVN-MPPR Front Panel Illumination With Knob Pressed
The second display mode is “Metering”. In this mode, the metering data of
each channel is shown by the LEDs around the rotary controls. The rotary
controls are not normally illuminated in this mode.
Pressing or turning the control will activate the displaying of the current
level for the channel. The level is displayed until the configured “Alternate
Display Duration” timeout expired or until the control is pressed again.
Virtual Mixer Assignment
It is possible to reassign the virtual mixer (VM) for the MPPR via the front
panel rotary controls. This is only possible if the unit is grabbed by a mix
engine – this is indicated by the Auth led being illuminated green. To enter
VM assignment mode, press and hold rotary controls A and B
simultaneously for 3 seconds. Once the unit enters VM selection mode,
rotary control D will be illuminated blue. Turning rotary control D will cycle
through the VMs as indicated by the Mixer LEDs. Once the Mixer LED that
corresponds to the desired VM selection is illuminated, press rotary control
D to confirm the new selection. <TODO: Add more details here if the newly
requested VM is unavailable>
Headphone sockets
XLR Mute
By default, the audio on the XLR output on the rear of the unit is not muted
when headphones are connected to one of the sockets on the front of the
unit. However, there is a “Headphone XLR Mute” configuration setting in
the “Misc Settings” section of the webpages to enable the muting of the
XLR output on headphone connection if required.
Attenuation
The headphones will have an additional software-configurable output level
control (one for each headphone output) to set the attenuation of the
signal to the headphone driver for comfortable levels at normal signal level
from the output. At present we know of 3 headphone types - 120 Ohm
(default), 2 kOhm (high impedance), and 8 Ohm (low impedance). The
maximum output of the headphone drivers is +12dBu so the minimum
attenuation parameter is 6db, which is present for all headphone types. The
attenuation parameter will act as a second attenuation and will have a
range from 0 to 24dB – the latter value will be chosen to provide sufficient
range to easily cater for the lowest impedance headphones. The “6.35mm
Att.” and “3.5mm Att.” attenuation settings can be set via the web pages in
the “Misc Settings” section.
GPO button
The button between the Mixer LEDs and the rotary controls provides a
virtual GPO from the unit that can be used on the Mix Engine to trigger a
GPO on its remote port. This button will illuminate red when it has been
selected by this MPPR and will be yellow when initiated by a paralleled
MPPR or MPTR. A MPPR can only de-assert a GPO that it has originally
asserted. However, the GPO can always be de-asserted by a MPTR. The pin
selection of the GPO is determined by the VM that the MPPR is currently
connected – VM1 maps to GPO1 and so on to VM8, which maps to GPO8.
The text on the button is a plastic insert so can be changed to suit your
particular application.
Press knob to show metering.