Specifications

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Digital inputs that are not routed (i.e., are not connected to "inputs block" or AES outputs)
will not affect the status of the EXT LED.
 See The Comprehensive Input / Output Scheme on page 49.
Using an External Clock
When you use the "external" clock, the system sampling rate will be that of the external
digital signal. The system sampling rate is the sampling rate used for all internal
processing. The external clock’s sampling rate is derived from the digital inputs shown in
the table below, or the word clock input. Unless sample rate conversion is on ("bottom"
clock menu page in the SETUP area), you must ensure that AES/EBU inputs 3/4 (and 5-
8 on H8000), if used, are synchronized to the selected clock input. Since no sample rate
conversion exists for the ADAT, AES 11-17 and FireWire inputs, you must ensure that
they are either synchronized to the source of the external clock or are in fact the source of
the clock.
 See Miscellaneous Setup Options on page 138 to enable/disable Word Clock input.
 See the H8000FW FireWire Interface
section for more information on using the H8000FW with a PC or Mac.
H8000 AE S1/2 SPDIF 1/2 ADAT
H8000A AE S1/2 SPDIF 1/2 ADAT
H8000FW AES11-17 SPDIF 3/4 OPTO 1/2 ADAT
Note: If the clock source is "unlocked" (not connected to a valid digital source), the
external clock will be invalid. If the external clock is invalid, the system sampling rate will
revert to the last valid internal clock rate.
Selecting the External Clock
The external clock is derived from the inputs
shown in the table above, or the word clock
input. It cannot
be derived from any other
digital inputs.
To set the system sampling rate to the external clock’s rate, set the
Source parameter on
the
clock menu page in the SETUP area to one of the available options. (S/P DIF and
OPTO will be available if selected under the [inputs] menu page).
The system sampling rate will now be the sampling rate of the selected external input.