Altera SDI Audio IP Cores - Manual (Page 47)

d. LED D17 illuminates when the receiver is frame locked.
e. LED D18 illuminates when the receiver is TRS locked.
f. LED D19 illuminates when the receiver is alignment locked.
g. LEDs D23, D22, D21 and D20 illuminate when the data packet of audio groups 1, 2, 3 and 4 are
detected in the incoming SDI stream.
This figure shows the condition of the LEDs.
Figure 6-5: Condition of LEDs for Transmitting 3G-SDI Level B Video Standard
D6 D7 D8 D9 D10 D11 D12 D13
D16 D17 D18 D19 D20 D21 D22 D23
Altera Corporation SDI Audio IP Design Example
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6-7 Transmit 3G-SDI Level B with Embedding of Audio Group 1, 2, 3 and 4
UG-SDI-AUD
2014.06.30