User manual
Operation
18
Operation of the MC-3+ Smart Clock USB
Main Function Menus
The four main function menus provide access to all features of your MC-3+USB.
Select the operational mode of the MC-3+USB via the »MODE« menu. This needs to be selected first. The factory default is
»INTERN«.
The »REFERENCE« menu allows selecting the individual inputs of the MC-3+USB. That means, herewith all possible external
references and the references for synchronous and externally referenced re-clocking may be activated for synchronization. The
factory default is 44.1 kHz.
The »CLOCK
OUT« menu allows selecting the basis clock rate for the Word Clock, AES3/11 and S/P-DIF outputs. It is accessible
when running the MC-3+USB in the »INTERN« mode and when »1–10.0 M« or »USB-DSD/DoP« is selected within the »REFE-
RENCE« menu. The factory default is set to 44.1 kHz.
Additional clock multipliers for each for the two Word Clock pairs and the digital audio outputs may be selected in the
»CLOCK
MULTIPLIERS« menu. Their numbering legend is assigned to the output numbers on the rear panel. Select the preferred
output with the »MENU« key and toggle to the desired multiplier by pressing the »SELECT« key. The factory default is set to x1.
The »STATUS« and »CLOCK
IN« menus serve system status monitoring purposes of the MC-3+USB only. They are not accessible
for user adjustments.
Attention
Shut-Down of Outputs
All digital outputs are muted while the function menus are active. After a function has been selected and the corresponding
LED stops flashing, the digital outputs are activated for signal transfer.
User settings
All user function settings will be stored and recalled when the unit is power-cycled.
»INTERN« – Selecting the internal Clock
The MC-3+USB runs as a clock generator and is locked to its internal ultra-low jitter master clock. The base clock rate for all
outputs can be selected in the »CLOCK
OUT« menu.
The example above shows that the MC-3+USB is locked to its internal ultra-low jitter master clock, which provides a clock
rate of 44.1 kHz to all of the available clock and audio outputs (= factory default). The »CLOCK
OUT« menu allows setting the
base clock rate of all the outputs to frequencies between 32.0 kHz and 192.0 kHz, which will be indicated by one or two LEDs.
The »CLOCK MULTIPLIERS« menu provides access to selecting several clock multipliers for the Word Clock (1&2), S/P-DIF (3), and
AES3/11 (4) outputs as described in the section »Choosing clock multipliers«. The current lock status of the frequency synthe-
sizer for the internal clock rate will be shown in the »STATUS« menu, while the »CLOCK IN« section reflects the base clock rate
selected in the »CLOCK OUT« menu.
The »REFERENCE« menu is deactivated in »INTERN« mode.
CLOCK MULTIPLIERS
1 2 3 4
MODE
32.0
48.0
INTERN
RE
-
CLK
EXTERN
×
1
×
8
×
4
×
244.1
88.2
96.0
×
256 SC
×
512
×
256
WC176.4
192.0
REFERENCE CLOCK OUT
WCLK
1
–
10.0M
USB
-
PCM
AES3/11
S/P
-
DIF BNC
AES3/11id
S/P
-
DIF OP
USB
-
DSD/DoP
STATUS
LOCK
MAIN REF
LOCK
RE
-
CLK REF
CLOCK IN
32.0
48.0
DoP
AUDIO
HOLD
44.1
DSD
88.2
64
128
96.0
176.4
192.0256
1
–
10.0M