Owner`s manual

Page 11
Frequency and Sync Mode
This rotary switch selects the Synchronisation Mode and the frequency of the
digital output when using the on-board clock generator. There are 4 modes of
operation:
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Master Sync Mode (Switch positions 0–5)
The digital output sample rate is set by and locked to the internal clock
generator. No sync signal is used.
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Auto Sync Mode (Switch positions 6–B)
The digital output sample rate follows the digital input. When a digital input
signal is not present, the output sample rate is set by and locked to the
internal clock generator at the frequency determined by the switch position.
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Auto-Lock Sync Mode (Switch position C)
No output is generated until lock with a digital input signal is achieved. The
digital output sample rate then follows the digital input. If the digital input
signal is removed then the output sample rate will be set by and locked
to the internal on-board clock generator at the frequency closest to the
previous digital input.
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Slave Sync Mode (Switch position D)
The digital output sample rate follows the digital input. When a digital input
signal is not present the digital output is turned off.
The following table summarises this. It shows the sample rate generated by the
internal clock in Master and Auto Sync modes.
FREQUENCIES AND SYNC MODES
kHz 32 44.1 48 64 88.2 96
MASTER 0 1 2 3 4 5
AUTO 6 7 8 9 A B
AUTOLOCK = C SLAVE MODE = D
Test/Calibration Mode
The calibration cycle calibrates the gain and the zero reference of the A/D
converter. For optimum performance, the ADA should be calibrated after you
change the Gain settings, ideally after a 10-15 minute settling period.
To calibrate the unit, set the rotary FREQUENCIES AND SYNC MODES switch to
position “F”. The power LED on the front panel will ash quickly for 2 – 3 seconds
and will illuminate fully when the unit is calibrated. Once calibration is complete,
reset the rotary switch to the position that you require.