User Manual-Windows

Quick Reference: HD192 I/O Front Panel

These LEDs indicate the current clock and sample rate conversion

settings for the AES/EBU section of the HD192. All of these

settings are made in the MOTU PCI Audio Console (see page 15

for a one-page overview).

AES/EBU Rate Convert IN

The AES/EBU input can either 1) slave to the HD192 system clock

(Rate convert AES IN is dark) or 2) sample rate convert the incom-

ing signal (Rate convert AES IN illuminates). To enable sample

rate conversion, check the Rate Convert check box in the Interface

Options window in MOTU PCI Audio Console (page 15).

AES/EBU Rate Convert OUT / with external clock

The AES/EBU output can either 1) match the HD192 system clock

(OUT is dark) or 2) run at different sample rate OUT lights up),

either under its own clock (with external clock is dark) or slaved

to the AES input or AES Word In (with external clock lights up).

44.1, 48, 88.2 or 96 kHz

One of these four orange LEDs lights up to indicate the current

AES OUT clock rate, even if it matches the current HD192 system

clock rate (the large green sample rate above).

19-segment ladder LEDs

for the twelve XLR analog

inputs.

When the HD192 system has a stable

clock (either internal or external), the

system’s sample rate is illuminated

here. If the HD192 is slaving to an

external clock, and the external clock is

running at either 2 times or one-half

the system clock, then both samples

rates ﬂash. For example, if the HD192

system clock is running at 96 kHz, but

it is slaving to a 48 kHz word clock,

then both rates will ﬂash here.

When the HD192 system has no clock

signal for some reason, the ‘no clock’

LED illuminates. Check your cables and

clock settings in the software.

The top red ‘over’ LED lights up when the signal reaches full scale — for

even just one sample — and remains illuminated until you clear it in the

software. The second ‘over’ LED below only lights up momentarily so that

you can continue to adjust level even after clipping has just occurred.

19-segment ladder LEDs

for the twelve XLR analog

outputs.