1817
Clocking with the ASP880
There are two ways to integrate ASP880
into your system digitally:
• As a MASTER clock source - internal clock
• As a SLAVE device - external clock
Master Clock Operation - INTERNAL
Assuming that you are connecting the
ASP880 digital output to a DAW/recording
interface with either AES or ADAT inputs,
the ASP880 can be set as MASTER clock
source as follows:
Select the appropriate sample rate on the
front of ASP880 by pressing the SAMPLE
RATE switch (1).
Ensure that your DAW/recorder session is
set to the same sample rate and that clock
source is set to external digital
input (either AES or ADAT).
Your DAW/recorder should
automatically follow the
sample rate set on the front
of the ASP880. Note that both
the AES and ADAT output
simultaneously so you can
feed a backup recorder at the
same time on location gigs!
1.
1.
CONNECT DIGITAL OUTPUT (AES or ADAT)
TO YOUR DAW/RECORDER
CONNECT DIGITAL OUTPUT (AES or ADAT)
TO YOUR DAW/RECORDER
Slave Clock Operation - EXTERNAL
You may have a studio master clock source
such that all digital devices synchronise to
your session sample rate, or perhaps you
would like the ASP880 to follow your DAW/
recorder session sample rate so that you do
not have to reconfigure the unit when you flip
between sessions at different sample rates.
In order to do this, you must set the ASP880
digital card to SLAVE to an external clock
source.
Press the SAMPLE RATE switch (1) until it is
flashing green (external clock mode).
Ensure that your master clock source is
connected via a 75Ω coaxial BNC cable to
the Word Clock input on ASP880 (2) - with
a valid clock signal present here, the green
LED in the SAMPLE RATE switch should
become solidly lit, indicating external lock.
If ASP880 is the only or last device in the clock
chain fed from the master clock, go ahead
andpressthe75Ωterminationswitch(3)to
ensure that the clock line is loaded properly
to stop any transmission line effects.
If using a BNC T-Bar to distribute clock
signals to various devices - please ensure the
lastdeviceinthechainisterminated(75Ω).
Hardware Features
MASTER CLOCK SOURCE
BNC OUTPUT
3.
75ΩCOAXCABLE
2.
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