Rosendahl nanoclocks GL - Manual (Page 8)

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5. Reference
REFERENCE = INTERNAL:
Press the INT. button to set the nanoclocks to its internal,
temperature-compensated timebase accurate to 0.2 ppm (parts per
million).
INPUT buttons are set inactive and the sample rate buttons enter a
blinking mode during the calibration process.
After a few seconds the sample rate buttons will light up continuously
to indicate LOCKED operation.
REFERENCE = VIDEO:
Press the VIDEO button to configure nanoclocks GL for video-
genlocked operation.
Both reference inputs A and B accept SD video syncs as well as HD
tri-level sync signals (1080p, 1080i, 720p).
Frame rates 23.98, 24, 25, 29.97, 30, 59.94 and 60 fps are detected
automatically and the INPUT buttons light up continuously when a
valid sync signal is present.
When no valid sync signal applies the INPUT buttons start blinking.
Nanoclocks GL will synchronise its audio clocks as soon as a valid
video input signal is detected and the sample rate buttons will start
blinking.
As soon as synchronisation is stable, the sample rate buttons will
light up continuously, indicating LOCKED to video syncs status.
You can select manually INPUT A or INPUT B by pressing the
according button.
AUTO mode automatically switches to valid inputs, where input A is
primary/ preferred.