User Guide

dCS Verdi Encore User Manual Manual for Software Issue 1.0x
dCS Ltd August 2005
Manual filename: Verdi Encore Manual v1.0x.doc Page 29 email: [e-mail]
English version web-site: www.dcsltd.co.uk
SDIF-2 / Word Clock
WClk Input Outputs
Type Single ended,
ground referred
Impedance 100 25
Ω
Level (unloaded) TTL TTL
Connector BNC BNC x 3
Table 5 – SDIF / Word Clock Interface Electrical Characteristics
Sample Rates
2.822MS/s DSD on the IEEE 1394 interface when playing an SACD. If the
upsampling feature is enabled, CD data is upsampled to DSD. Use with a
44.1kHz Word Clock.
16 bit / 44.1kS/s on AES, RCA, BNC, Toslink and SDIF-2 interfaces,
downsampled when playing an SACD.
The Word Clock interface generates / accepts a 44.1kHz Word Clock.
Clocking
The sample clock quality significantly determines the output performance of the
unit. The highest quality clocks that are available are crystals, so we use these.
Verdi Encore uses on-board voltage controlled crystal oscillators (VCXO’s) as
clock sources. In master mode, this clocks the outputs and controls the
mechanism.
When slaving to Word Clock In, the VCXO is synchronised to the clock signal
extracted from the input by a phase locked loop (PLL). This PLL is of a special
narrow bandwidth type, that provides a significant degree of "clock cleaning”.
The PLL is also very robust, and will lock to very poor signals if necessary.
Accuracy Typically ± 3 parts per million at time of shipping
Synchronising to Word Clock In x
The unit will slave to a 44.1kHz Word Clock on the Word Clock In connector.
Pull-in range ± 300 parts per million about nominal frequency
Lock-in time < 6 seconds for most situations
Power requirements
Units may be set for 100, 115/120, 200, 215/220 or 230/240V (+/-10%),
50/60Hz AC operation.
Typical power
consumption
Maximum power
consumption
Purcell &
Verona
16W 20W
Delius 21W 25W
Elgar Plus 34W 40W
Verdi Encore 25W 50W
Table 6 – Power consumption for consumer products