DAD AX32, Руководство пользователя

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User Manual AX32
Doc no. AX32-8002-A-4 Rev. date 140124 Page 19 of 31
Optical 1 / Optical 2 Interface
The Optical MADI interfaces can be configured for
compatibility with different implementations of MADI.
Mode can be set to Disabled, MADI or NTP HotLink. The
optical interface board can be fitted with one or two SFP
optical interface modules. It is recommended to Disable the
optical interface if no SFP optical module is installed. The MADI
mode defines that the interface operates as a MADI signal. The
NTP Hotlink mode is never used.
Frame rate can be set to “Legacy” or “High”, but only if the sample rate is higher than 48 kHz. If the
sample rate is 44.1 kHz or 48 kHz, the Frame rate is always Legacy. In Legacy mode, the MADI Frame length
is maintained and adjacent channels are “merged” into one channel. In High mode, the MADI Frame length
is reduced rate and consequently the Frame rate is increased. Because of this difference, the High mode has
lower latency than the Legacy mode. Please note that some 3
rd
party MADI products may not support High
mode.
Frame size can be set to “Normal” or “Extended”. Normal mode supports up to 56 channels whereas
extended mode supports up to 64 channels.
Ch. status can be set to “Default” or “Transparent”. The Ch. status setting is only relevant when routing
incoming AES/EBU or MADI channels to a MADI output. In Default mode, the MADI Channel status bits are
defined by the AX32, whereas in Transparent mode the channel status bits from the relevant source
(AES/EBU or MADI) are transferred to the outgoing MADI signal. In most general cases it is best to leave it in
Default mode.
Input rate can be set to “Auto” or “As AD”. In Auto mode, the AX32 will try to determine the sample rate
of the incoming MADI signal. In As AD mode, the AX32 will assume that the incoming MADI has the same
sample rate as the AX32. It is usually recommend to leave this in Auto mode, however there may
occasionally be compatibility issues with 3
rd
party products. In that case, setting it to As AD may solve the
problem.