Using the 888/24 I/O
11
7
Place it in the position corresponding to
the value that you desire. For an AES/EBU
word clock lock port, it should be placed
over the right two prongs. For a S/PDIF
word clock lock port, it should be placed
over the left two prongs. Refer to Figure 1
and 2 for details.
8
After you have made the desired changes,
replace the top of the 888/24 I/O.
9
Replace the four front panel screws using
the hex wrench.
10
Replace the top screws with a Phillips
screwdriver.
Muting the DAC Outputs of
the 888/24 I/O in A/D
Stand-Alone Mode
In certain cases, you may wish to mute the
888/24 I/O’s D/A converters when in A/D
stand-alone mode. This is useful if, for ex-
ample, you need to eliminate potential ex-
ternal analog feedback through a console.
To do this, you must open the 888/24 I/O
and move an internal jumper switch so
that the DACs are muted during stand-
alone operation.
☞
Refer to Figure 1 and 2 for details on jumper
switches and their default positions.
To change the DAC output mute setting of the
888/24 I/O in stand-alone D/A mode:
1
Make sure that your computer and
888/24 I/O are turned off.
2
With a Phillips screwdriver, remove the
screws from the top of the 888/24 I/O.
3
Using the 1/16 inch hex wrench in-
cluded with the 888/24 I/O, carefully re-
move the front four panel screws as noted
on the bag containing the hex wrench.
4
Lift the top off of the 888/24 I/O.
5
Inside the left-front of 888/24 I/O’s chas-
sis, near the large FPGA chip, is a set of
three jumper switches, each with a remov-
able cap. Each of these switches controls a
different default function as shown in Fig-
ure 1 and 2.
6
Locate the jumper switch for the DAC
muting default (the middle jumper) and
gently lift the cap off the 3-pronged con-
nector.
7
Place it in the position corresponding to
the value that you desire. To mute the
DACs, it should be placed over the left two
prongs. To unmute the DACs (as in normal
operation), it should be placed over the
right two prongs. Refer to Figure 1 and 2 for
details.
8
After you have made the desired changes,
replace the top of the 888/24 I/O.
9
Replace the four front panel screws using
the hex wrench.
10
Replace the top screws with a Phillips
screwdriver.
