Orban OPTIMOD-FM 8600, Operating Manual

Page: 325 / 397

OPTIMOD-FM DIGITAL TECHNICAL DATA
6-13
normally. Please note any such messages and be ready to report them to Orban Cus-
tomer Service.
The DSP chips are located on the DSP board—see the drawings starting on page 6-
60. IC801 is a local switching-type voltage regulator on the DSP board that derives
the +3.3 V supply for the DSP chips from the +RAW unregulated system voltage,
while IC802 creates a +1.2 V regulated supply from +RAW.
AES Output L/R Channel Reversal Bug
In the year 2011, some 8600s were shipped with a firmware bug on the DSP board
that caused a left/right audio channel reversal and a one-sample delay difference
between the left and right audio channels. This bug affects only the two digital
outputs, not the analog L/R or composite outputs.
If your unit has the bug, you can fix it permanently by performing the following
procedure:
A) Upgrade to version 1.2.1 or higher software, following the instructions under
the heading “Upgrading Your 8600 Software.” This appears in the
8600_x.x.x_Readme.htm file that is copied to your computer when you run the
Setup8600_X.X.X.X_PC_Remote.exe file. 8600_x.x.x_Readme.htm contains the
latest version of the instructions below.
B) Use the 8600’s built-in test tone generator in System Setup>Test to determine
if your unit has the bug. (Refer to Test Modes on page 3-84 for more infor-
mation on the tone generator.)
Set the test mode to Tone and the tone generator’s Tone Mod Type to Left.
Observe whether this tone appears on the left or right audio channel of
whichever AES output is most conveniently accessible. (If one output has the
channels swapped, then both outputs do.) If and only if the tone appears on
the right channel, complete the procedure described in steps (C) through (E)
below.
C) Disconnect AC power from your Optimod and then reapply power. Within
two seconds after the “Optimizing…” screen appears, press the Escape but-
ton. The Choose If TDF Modifications Are Installed screen will appear.
D) Using the joystick,
L
OCATE
to the
C
ANCEL
button and then press the
E
NTER
button. The AES 1 and 2: L/R Output Swap screen appears.
E) Using the joystick,
L
OCATE
to the
C
HANGE
S
TATE
button and then press the
E
NTER
button. This will correct the problem. Your Optimod will then automat-
ically reboot into its normal operating mode.
The correction that you just implemented is permanently recorded in the
EEPROM on your Optimod’s control board. Only the procedure described
in steps (C) through (E) above can change it. The correction will survive
future software upgrades and will also remain active even if you reset
your Optimod to its factory defaults by following the procedure de-
scribed in
If you have forgotten your “All Screens” passcode starting on
page 2-48.