15
Operation
Selecting References
Selection of references is mainly used when the MC-3+ is set under »MODE« to »EXTERNAL« or »RE-CLOCK«.
The above setting example shows the MC-3+ locked to an external Word Clock signal. Its clock rate is then displayed in the
»CLOCK IN« menu on the right hand side of the front panel. Within the »REFERENCE« menu you can select the other available
inputs by presssing the »SELECT« key repeatedly. The example shows furthermore, that in the »CLOCK MULTIPLIERS« menu
multiplication factors are set for the indivdual outputs as follows:
Word Clock output pair 1: Reference clock x 1
Word Clock output pair 2: Reference clock x 4
Word Clock output pair 3: Reference clock x 2
S/P-DIF output 4: Reference clock x 2
AES3/11 output 5: Reference clock x 1
When working in the »INTERNAL« mode, only the LED bar marked with »IN 10.0M« is available for selecting the
basis clock rate of all outputs. There are seven different audio-related basis clock rates between 32.0 kHz and 192.0 kHz
selectable by pressing the »SELECT« key repeatedly, indecated by one or two LEDs.
Selecting 10.0M as Clock Reference
When stepping through the »REFERENCE« menu and selecting »10.0M« as reference, simultaneously the first LED of the »IN-
10.0M« sub menu starts lighting and you can select with the »SELECT« key one of the seven clock rates provided by
the internal ultra-low jitter clock generator. The outgoing clock signals are now of the selected clock rate, but frequency-locked
to the externally applied 10.0 MHz reference signal. Also in that mode, clock multipliers can be adjusted freely, as mentioned
in the »Selecting Clock Multipliers« section.
Further Setting Examples
A 10.0 MHz clock signal is applied as reference and the basis
clock of all outputs is set to 48.0 kHz. The outputs provide
different multiples of the basis clock rate due to the adjustments
of the clock multipliers. All four red LEDs in the »CLOCK IN« area
light to show that a 10.0 MHz reference comes in.
A coaxial S/P-DIF digital audio signal is applied as reference. All
outputs provide their clock rates aligned to the selected multi-
plication factors. The S/P-DIF (»4«) and AES3/11 (»5«) outputs
supply blank frame signals.
MODE
RE-CLOCK
EXTERNAL
INTERNAL
x 256
x 4
x 2
x 1
CLOCK
MULTIPLIERS
1
5
4
3
2
REFERENCE
S/P-DIF op
S/P-DIF co
88.2
48.0
44.1
32.0
192.0
96.0
176.4
10.0M
WCLK
IN 10.0M
AES3/11
MODE
RE-CLOCK
EXTERNAL
INTERNAL
x 256
x 4
x 2
x 1
CLOCK
MULTIPLIERS
1
5
4
3
2
REFERENCE
S/P-DIF op
S/P-DIF co
88.2
48.0
44.1
32.0
192.0
96.0
176.4
10.0M
WCLK
IN 10.0M
AES3/11
MODE
RE-CLOCK
EXTERNAL
INTERNAL
x 256
x 4
x 2
x 1
CLOCK
MULTIPLIERS
1
5
4
3
2
REFERENCE
S/P-DIF op
S/P-DIF co
88.2
48.0
44.1
32.0
192.0
96.0
176.4
10.0M
WCLK
IN 10.0M
AES3/11
