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Eventide H7600 User Manual
59
External Clock System Sampling Rate and External Sync Indicator
The System Sampling Rate and External Sync Indicator is the
column of five LEDs immediately to the left of the display. The top
four LEDs indicate the status of the system sampling rate. Possible
LED states are
Solidly lit –
When one of the top four LEDs is solidly lit, the
system sampling rate is exact (
+/
- 0.05%
).
The LED that lights
corresponds to the system sampling rate.
Blinking –
When one of the top four LEDs is blinking, the system sampling rate is
between one of the fixed rates. The LED that lights corresponds to the system sampling
rate.
The bottom LED,
EXT
, has three possible states:
Solidly lit –
When the bottom LED is solidly lit, digital inputs are locked and
everything is operating properly.
Blinking regularly –
When the bottom LED is blinking regularly, digital inputs are
unlocked. Because of this, the external clock is invalid and the system sampling rate will
revert to the last valid internal clock rate.
Blinking irregularly –
When the bottom LED is blinking irregularly, the digital inputs
are slipping, and the associated signal is unstable.
Sample Rate Conversion (SRC)
In general you need to make sure that any digital inputs are synchronized to the
system sampling rate.
If for whatever reason you cannot synchronize the digital inputs to the system
sampling rate, use sample rate conversion (SRC):
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