Leds Of The Madi Card 1.950.615.21 - Studer D950 Operating Instructions Manual

D950 Digital Mixing System
9.3.2.3 LEDs of the MADI Card
FAIL
IDLE
SYNC
IF 1
IF 2
IF 3
IF 4
Card number
Connectors
RS 232
9-8 Troubleshooting/Maintenance
FAIL The red FAIL LED on a working card normally should be off. It is on
whenever the card fails or it is reset either manually or by the system.
IDLE The green IDLE LED is on whenever a card is not used for the current
configuration. It is off when the card is processing audio.
Important: Never remove a card with both the IDLE and the FAIL LEDs off. This card
is actively used to process audio data; the result of removing the card is
unpredictable.
SYNC The green SYNC LED has no meaning on a MADI card and is always off.
IF 1...4 The four IF LEDs are on whenever the corresponding interface input sig-
nal below is valid. When it is off, either the transmitting device is off, TX
and RX are mismatched, or the cable is broken.
The card number corresponds to the MADI interface in your configuration.
Be careful to match this number to the corresponding interface number.
The numbers start with "00" on the first card for the first two MADI inter-
faces and are continued as "01", "02", and so on for subsequent groups of
two MADI interfaces each. A sufficient number of MADI cards must be
present in the DSP rack, and they must be numbered properly.
Example: If the current Session Configuration requires four MADI interfaces, there
must be two MADI cards numbered "00" and "01" in the DSP rack, in or-
der for the system to work properly.
This first interface (SC connector) is used to connect the main MADI A
signal to the core. When the connection is done properly, the IF1 LED will
light green. TX1 is the main output of MADI A, RX1 is the main input of
MADI A.
The second interface (SC connector) is used to connect the main MADI B
signal to the core. When the connection is done properly, the IF3 LED will
light green. TX2 is the main output of MADI B, RX2 is the main input of
MADI B.
The third/fourth interface (SC connector) are used to connect a redundant
MADI A/MADI B signal to the core. When the connection is done properly,
the IF2/IF4 LED will light green. TX3/4 is a redundant output of the cor-
responding main output. The input can be main MADI A/B or redundant
MADI A/B, depending on which connection is valid. If both connections
are valid, the first connection to become valid will be used. RX3/4 is used
as an extra redundant MADI A/B input. When the main MADI A/B input
is not valid, the system automatically switches to this input when a valid
signal is available. Switching is done within one audio sample. The lost
audio sample is zeroed. When the main MADI A/B input becomes valid
again, the system will not switch back until the redundant MADI A/B con-
nection fails.
RS 232 This serial interface is used only for card testing during manufacturing.
Do not connect anything during normal operation!
SW V3.3
1.950.615.21
Date printed: 03.09.03