SOLID STATE LOGIC Alpha Link MADI AX IO Bundle Руководство по эксплуатации онлайн [20/32] 776259

Notes for Virtual Switches, Page One

1. There are two MADI channel formats; 56 or 64 channel. The 56 channel format allows for ±10% deviation from

the nominal sample rate whilst the 64 channel format uses the full capacity of the MADI stream fixed to the

selected sample rate. Not all MADI interfaces support both formats; please refer to the documentation for the

connected interface to determine the correct format to use. Note that the MADI link transmission rate is always

fixed hence at higher or ‘2Fs’ sample rates the channel capacity is halved to either 28 or 32 channels.

For Alpha-Link LIVE to control 8-RMP units, it is essential that the MADI port be set to operate in 56 channel

mode; control signals are transmitted as data packets over channel 57.

2. These options are used either to determine the rate of the master clock or to set the data format for that interface.

a. If the unit is set to lock to the interface in question, these options determine how the clock signal embedded

in the selected clock source is interpreted

when the clock is below 57kHz (Fs rate)

• When the source sample rate is Fs, the ‘2Fs / Legacy (SMUX)’ setting is invalid; ‘Fs / High Speed’ must

be selected to receive valid data. The distributed clock will be Fs.

• When the source sample rate is 2Fs – with ‘Legacy (SMUX)’ format data – the ‘Fs / High Speed’ setting

is invalid; ‘2Fs / Legacy (SMUX)’ must be selected to receive valid data. (For ADAT – AX and MADI-AX –

units it this action that forces the interface to 2Fs.) The distributed clock will be Fs.

When Alpha-Link is provided with a 2Fs rate clock (above 57kHz) the setting of this switch will be ignored

and the distributed clock will always be 2Fs rate.

b. If the unit is

not

set to lock to the interface in question

and the interface provides multiple data formats

(ie. not ADAT)

, these options are used to set the 2Fs data format for that interface:

• When set to ‘Legacy (SMUX)’ a half-rate frame pattern will be used. This format is functionally compatible

with Fs rate interfaces and may be required to interface to older equipment.

• When set to ‘High Speed’ a proper 2Fs frame pattern will be used.