Installation guide

TDM Installation Guide24
To change the operating level of an input channel:
1 Turn off your computer and the 888/24 I/O.
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 included
with the 888/24 I/O, carefully remove the front
four panel screws as noted on the bag contain-
ing the hex wrench.
4 Lift the top off of the 888/24 I/O.
5 Inside the 888/24 I/O chassis, next to each of
the channel input trims, there is a jumper
switch with a removable cap. Locate the jumper
switch for the channel you want to modify.
Gently lift the cap off the 3-pronged connector.
Place it in the position corresponding to the op-
erating level that you desire. For +4 dBu levels, it
should be placed over the rear two prongs. For
–10 dBV levels, it should be placed over the
front two prongs.
6 After you have made the desired changes, re-
place the top of the 888/24 I/O.
7 Replace the four front panel screws using the
hex wrench.
8 Replace the top screws with a Phillips screw-
driver.
To change the operating level of an output
channel:
1 Turn off your computer and the 888/24 I/O.
2 Using the 1/16-inch hex wrench included
with the 888/24 I/O, carefully remove the front
four panel screws as noted on the bag contain-
ing the hex wrench.
3 With a Phillips screwdriver, remove the screws
from the top of the 888/24 I/O and lift the top
off of the 888/24 I/O.
4 To find the channel output switches, detach
the front part of the ribbon cable at the right
side of the chassis. To do this, grip both sides of
the black connector and gently pull up.
5 With the ribbon cable out of the way you’ll
see eight 3-pronged jumper switches, each with
a removable cap. Locate the switch for the chan-
nel you want to modify.
6 Gently lift the cap off of the jumper switch.
Place it in the position corresponding to the op-
erating level that you desire. For +4 dBu levels, it
should be placed over the left two prongs. For
–10 dBV levels, it should be placed over the
right two prongs.
7 After you have made the desired changes, re-
connect the ribbon cable and put the top back
on the 888/24 I/O.
Setting the input level jumper switches
pull off jumper
place jumper
in this position
to set input
to +4 dBu level
place jumper
in this position
to set input
to -10 dBV level
+
4
-10
+
4
-10
+
4
-10
Setting the output level jumper switches
detach
ribbon cable
remove jumper
+
4
-1
0
place jumper
in this position
to set output
to +4 dBu level
place jumper
in this position
to set output
to -10 dBV level
TDM_Install.book Page 24 Saturday, January 13, 2001 9:35 PM