Troubleshooting - Neumann.Berlin DMI-8 Bedienungsanleitung

Mode 2: The microphone is synchronized by the
DMI-8. In this case, the DMI-8 performs a fre-
quency/phase comparison between the word
clock signal recovered from the microphone
signal, and the word clock of the DMI-8. From
the phase deviation thus determined, the DMI-8
calculates a control signal which is transmitted
via the remote control data stream to the micro-
phone, where it controls the frequency of the in-
ternal quartz oscillator.
8.

Troubleshooting

Problem
The RCS does not indicate that a
microphone is switched on and
connected to the DMI, even though
the "VALID" LED on the DMI is
lit up.
The "Ext. Word Clk" LED is not lit
up, even though an external word
clock has been connected.
The "Ext. Word Clk" LED blinks
continuously. (Blinking for a short
period following activation of an
external word clock is normal, and
indicates that the synchronization
process is being carried out).
EN
20
Via the BNC output, the internal word clock gen-
erator of the DMI-8 can be used to synchronize
additional DMIs and connected equipment, such
as a mixing console.
▶
Possible causes
The DMI is not recognized by the
RCS software. – Cause:
The DMI was not switched on
at the time when the RCS was
started.
The same ID has been used for
more than one DMI.
The ID has been changed while the
DMI was in operation.
Incorrect interface setting (USB,
COM1 or COM2).
No word clock signal has been
detected.
A word clock signal is present,
but has not been interpreted as a
valid signal. This can occur, for ex-
ample, if the word clock frequency
deviates by more than ±50 ppm
from the nominal value.
▶
Solution
Do not start the RCS until the DMI
has been switched on, or execute
the command Options/DMI and
then close the window again.
Set the ID by means of the coding
switch on the back of the DMI;
each DMI must have a different ID!
After an ID is changed, the DMI
must be restarted. Then restart
the RCS, or execute the command
Options/DMI and then close the
window again.
Select the correct interface in the
RCS via the command Options/
Communication.
Check the source of the word clock
signal and the cable connection.
Check the word clock frequency or
select another source for the word
clock signal. Alternatively, remove
the external word clock and use
the DMI internal word clock as the
master word clock for the signal
chain.