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88
Manual SDs-01 D 3.2.2003 17:45 Uhr Seite 16
24
STATUS
This area displays different system conditions of your MC-4. There is no
access for changing settings.
»LOCK
1
« and »LOCK
2
«
Doing unidirectional format conversions or bidirectional format conversions
with SRC, the »LOCK
1
« LED lights when the internal PLL circuit has detected
the incoming digital audio signal or clock reference signal as valid. During
bidirectional format conversions or the different X-SRC modes, the »LOCK
1
«
and »LOCK
2
« LEDs light both, when the incoming digital audio signals are
valid. As it is only possible to do bidirectional conversions between ADAT
TM
and AES3, the first LED »LOCK
1
« is assigned to the ADAT
TM
input and the
second LED »LOCK
2
« is assigned to the AES3 inputs.
If the digital audio signal or reference clock signal is unstable, the »LOCK
1
«
and »LOCK
2
« LEDs do not light, the whole audio conversion process will be
stopped and the digital audio outputs do not transmit any signals.
If the internal oscillator is selected as reference clock for the SRCs, the
»LOCK
1
« LED will light correspondingly.
»SMUX2 + SMUX4 ADAT OUT«
These two LEDs light correspondingly, if an ADAT
TM
/ SMUX2/4 signal with a
sampling rate between 50.0kHz and 100.0kHz (SMUX2), or with a sampling
rate between 100.0kHz and 200.0kHz (SMUX4) is output. These LEDs are
not reporting any state of the ADAT
TM
optical inputs!
REF CLOCK IN
»1« + »2«
This area displays the incoming reference clock rates for the different states
of operation of the MC-4.
When working with unidirectional format conversion only, the sampling
rate of the digital audio signal, which is selected as reference, will be
displayed under »1«. Doing unidirectional format and sampling rate
conversion, the clock rate of the selected reference clock signal will be
displayed »1« as well.
When working with bidirectional conversion modes, the two LED lines are
pre-assigned, for the ADAT
TM
signal line »1« and for the AES3 signals line »2«.
If the internal oscillator supplies the reference clock for the SRCs, the clock
rate which is selected in the »REFERENCE« menu will be displayed under »1«.
The following basis reference clock rates are supported and will be
analyzed:
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
Word Clock Rates
Super Clock Rates
11.2896MHz 12.288MHz
These indications are only available if
the internal PLL circuit is locked stably
to the external reference signal and the
corresponding blue LOCK LED lights
permanently.
STATUS
REF CLOCK IN