Rosendahl nanosyncs HD - Manual (Page 7)

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7. Audio Reference
Enter the setup mode and select the audio reference section.
(See page 10 for more informations how to navigate through the
different setup sections.)
The audio reference can be set to:
FOLLOW VIDEO:
The audio clock generator follows to the selected video reference.
If you want to use the nanosyncs HD as a studio master set the video
reference to INTERNAL and the audio reference to FOLLOW VIDEO.
To synchronise the audio clocks to an external video reference you
must slave the video section to this external video reference and set
the audio reference to follow video.
When one of the selected SD or HD video generator standards does
match an integer relationship with the selected word clock sample
rate (for example PAL and 48 kHz) the audio clock phase will be
adjusted to the video phase.
This means that the video’s start of picture will be phase locked to
the word clock signal. Thus synchronising several nanosyncs HD to
the same house sync reference will result in phase locked audio word
clocks between all units.
The blue LOCKED LED indicates the generation of video locked
audio clock signals.
EXT. WORD FS:
When you set the audio reference to external word clock FS, the
word clock generator resolves to a defined external word clock
frequency.
In this operation mode you can select the generated sample rate
independent of the input sample rate.
You can synchronise for example a 44.1 kHz word clock signal to an
external 96 kHz word clock reference. This means the unit works as
an electronic gearbox to synchronise different sample rates together.
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This functionality is a powerful tool when you need to convert a audio
project from one sample rate to an other using a sample rate
converter and your nanosyncs HD for locking both clocks together.
The input word clock is set with the four FPS leds in the audio
reference section and the output sample rate is set in the standard
sample rate and multiplier sections (see page 17).
The four FS LEDs in the audio reference section indicate the
selected external word clock sample rate.
These LEDs are also used to indicate the selected frame rate for
audio reference mode = LTC and the denomination left of the slash
relates to the FPS value for LTC operation and the value right of the
slash relates to the operation mode external word FS.
Example: In operation mode external word FS LEDs 25/48.0 and
30/x2 are on means the unit synchronises the audio clocks to an
external 96 kHz external word clock signal.
The blue LOCKED LED indicates the generation of gearbox locked
audio clock signals.
EXT. WORD 1:1:
Audio reference mode EXT WORD 1:1 regenerates the incoming
word clock sample rate from 40-200 kHz on all word clock outputs
1:1 (AES and SPDIF outputs are limited to Fs x2 rates up to 100
kHz).
You can use nanosyncs HD as a word clock distributor which follows
to all incoming sample rates automatically with the advantage that all
clocks are regenerated. This results in highest clock quality on all
outputs independent of the word clock input signal used.
The blue LOCKED LED indicates the locked 1:1 regeneration of
audio word clock signals.