Nevion AVA-MUX - Manual (Page 14)

AVA-MUX Rev. C
nevion.com | 14

Group4 output is not embedded

AES1&2 outputs signals from de-embedded group1
Users familiar with binary numbers may see that numbers 1 to 4 (001 to 100) correspond to
groups 1 to 4.
3.2.1.2 Other DIP Switches
3.2.1.2.1 A/D converter gain, SW3.4+5+6
The A/D input levels may be set to one of the eight preset levels. The levels correspond to
the maximum sine wave level, otherwise known as 0 dBFS.
+12, +13.5, +15, +16.7, +18, +20, +21 or +24dBu.
All four input levels are set by the DIP switches in DIP configuration mode. GYDA can set the
levels for each stereo pair.
3.2.1.2.2 Non-SRC mode, SW1.7
When SW1.7 and SW1.8 are on, the sample rate converters will not be used. The user must
ensure that the AES input signals are locked to the video signal audio; otherwise click noises
will be produced in the embedded audio signals.
3.2.1.2.3 DIP Configuration, SW1.8
SW1.8 on, forces the DIP switch configuration to be used. If there is a GYDA present, the
switch configuration on the module will be used but the configuration will be monitored in the
GYDA controller. Control of the card parameters can not be changed with GYDA.
SW1.8 off will not use the DIP switches but will be configured from either the stored
configuration in the module or from GYDA if there is GYDA present. The configuration will be
stored when a GYDA configuration command is used. Therefore if a GYDA is present, the
internal configuration will be overwritten by the GYDA controller.
The DIP switch settings control the routing and a couple of other important settings. Other
stored settings, such as data embedding and generator settings will always be used.
3.2.1.2.4 LED mode, SW2.7
The switch controls how the two audio LEDs function. If the switch is off, the LEDs show the
AES receiver status. If the switch is on, the LEDs show the presence of embedded groups.
3.2.1.2.5 EDH insert, SW2.8
SD video output from the module will only contain an EDH packet if SW2.8 is on.
3.2.1.2.6 Fallback generator control, SW3.7
This switch is used to control the outputs when the input signals are not present.
SW3.7 on: The Video output will be disabled if the input signal is removed.
The AES outputs will be disabled if the source routed to that output is not present. The input
presence is embedded in the embedded audio data packet so that an AES input failure on a
distant card will disable an AES output which uses audio embedded by that distant card.
SW3.7 off: The internal video generator will be used as an input until a valid video signal is
detected on one of the inputs.
The AES outputs without a source signal present will always be on but the signal will be
silence.
3.2.1.2.7 !20/24 bit (SD), SW3.8
SD video will contain embedded audio with a word length of 24 bits if SW3.8 is on.
SD video will contain embedded audio with a word length of 20 bits if SW3.8 is off.
HD video will always contain embedded audio with a word length of 24 bits.