Manual

page 44 of 93 EXBOX.RAV Manual - Version 1.1
CHAPTER 5: Remote Control
EARS™ - Triggering
The EXBOX.RAV supports two kinds of trigger signals:
• BLDS™ (generated by the BLDS™ Generator)
• Pilot tone (audio signal with a level higher than -40 dBFS).
Switching by BLDS™ trigger is immediate (between two samples). The Pilot tone
is evaluated for 10ms before switching is triggered.
Mode Main trigger Backup trigger
2 - 4 NET ch 64 (ch 32 @ 2FS) MADI ch 64 (ch 32 @ 2FS)
5 NET ch 32 (ch 16 @ 2FS) NET ch 64 (ch 32 @ 2FS)
The trigger at the MADI input is expected according to the selected mode
(2 = SFP, 3 = BNC, 4 = SC).
NOTE
With the FastSRC™ activated at the NET I/O the trigger signal detection of EARS™
is limited to Pilot tone - see "Sample Rate Conversion" on page 26.
EARS™ - Routing
With EARS™ activated the routing matrix is ignored. MAIN source is always the
NET (RAVENNA) input.
Mode 1:
No redundancy switching, signal routing follows routing matrix.
Modes 2-4 - 'NET > MADI':
All 64 channels of the NET input are routed onto all outputs (1:1). If the trigger
signal of the NET input fails, the Backup MADI port is taken according to the mode
(either SFP, BNC or SC) and also routed onto all outputs.
Mode 5 - 'NET > NET':
NET input channels 1 - 32 are used as MAIN source and channels 33 - 64 are used
as BACKUP source. Depending on the trigger state MAIN or BACKUP are routed
onto all outputs.
If the trigger signal fails on channel 32, the Backup signal (= NET channels 33 - 64)
is taken and routed onto all outputs.