stability external clock source is available but both C1 and D1 are equipped with a SYNC_IO board, the optimal configuration is to
set the C1 as the clock master (C1 clock source: INTERNAL), and D1 as the clock slave (D1 clock source: SYNCHRO BNC 75). In that
case, connect one of C1's BNC clock out to D1's clock in configured as a 75 Ohm input with a 75 Ohm BNC-terminated cable.
1.4 Power supply
The power supply of the D1 is a linear supply with multiple independent local regulations. It is based on an oversized magnetically
shielded toroidal mains transformer and includes a mains filter. A secondary (also toroidal) transformer is used as Standby
transformer to ensure green Standby mode, meeting the latest energy saving regulations. Both transformers have static shields
between primaries and secondaries. They are mounted on a separate steel plate which is isolated from the main base steel plate by
silent blocks.
Discrete (power-transistor and op-amp based) ultra low noise regulators are used throughout the power supply and special care has
been paid to the master clock power supply. The master clock benefits from its own dedicated supply, completely decoupled from
the noisy digital and motor sections. This ensures an ultra-low jitter clock source for the whole system.
Input AC voltage to the power supply can be set to 100V, 115V or 230V AC depending on your local mains voltage.
1.4.1 Optional external power supply
The D1 is equipped with an external power supply input. This input is dedicated to the CH X1 external power supply. When the
external power supply is connected, the internal power supply of the D1 is turned off (only the Standby transformer remains
active). Turning the main internal transformer off ensures that no power supply induced noise or radiations are generated inside
the D1 unit, thus permitting optimal operating conditions for the circuits. Moreover, the D1's internal voltage regulation stage are
still active, cascaded with the X1's regulation stages, significantly lowering the noise floor.
Rev 3.0
D1 User Manual
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