Specifications

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ADMS 44.22 Installation and Operation Manual
DESCRIPTION
1.3 Synchronization and Clocking
The ADMS 44.22 supports internal and external sample clock rates of 32 kHz,
44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz, and can be synchronized to external digital
devices using the Word Clock In and Word Clock Out connectors on the rear panel.
1.4 Interconnect Port
Two ADMS 44.22 can be linked together to form a 16x2 stereo matrix
switcher by connecting the Interconnect port of two units. When units are properly
linked, outputs 1 and 2 of the Slave unit are summed into outputs 1 and 2 of the
Master (pre ALC), respectively, while the Slave unit’s physical outputs continue to
be active.
The Interconnect port is a bi-directional LVDS signal that carries outputs 1
and 2 from the Slave, and word clock and bit clock from the Master. Because sig-
nals remain in the digital domain, there is no A/DD/A conversion loss, and no exter-
nal clock signals are required to synchronize the two units. The Interconnect port
cable does not carry control and configuration information. Each ADMS 44.22 unit
must be controlled individually using the multi-drop RS-232 or USB setup methods
described in section 2.9.
To create a 16x2 matrix, one unit must be configured as the Master, and the
other unit as the Slave. The Master/Slave mode is set by the PWR UP switch (SW9)
on the rear panel. When the Master and Slave units are powered up in their factory
default configurations, both units are automatically synchronized: the Master unit is
set to use the Internal sample clock, and the Slave to use the Master ADMS clock
coming over the Interconnect port cable. Alternatively, either the Master or both
Master and Slave units can be set to use Word Clock from an external source.
Note: Because the Slave ADMS 44.22 is summed into the Master’s outputs
before the Master’s output ALCs, when a Master’s output ALC is enabled, the
Slave’s output ALC should be disabled.
1.5 Preset Memory
The ADMS 44.22 allocates three non-volatile memory banks for storing and
recalling all software and front-panel controllable parameter settings. Recalling a
preset causes the current parameter settings to match the settings stored in the pre-
set. Saving to a preset saves the current parameter settings to the preset.
The Factory Default Preset contains the factory defaults for all parameter set-
tings. The Factory Defaults can be recalled at any time, but cannot be changed by
the user. The User Preset is for user-defined setups and can be stored and recalled
at any time.
The Last Saved Preset automatically stores the current parameter settings five sec-
onds after any setting changes. This guarantees that in the event of a power failure,
the most current unit settings can be automatically restored on power up. The Power
Up Mode switch (SW6) on the rear-panel determines whether the Last Saved or the
User Preset bank is recalled whenever the unit is powered up or reset. See section
4.9 for a list Factory Default settings and details on which parameters are