66 • DMIC-20
SoundPals User's Guide
DMIC-20 Installation
This section provides instructions for connecting power, microphone
inputs, AES reference, and digital outputs.
NOTE
For information on rack mounting the DMIC-20 with
the optional rack tray, refer to Appendix C.
Connecting Power
Plug a 6 VDC power supply into the appropriate voltage outlet for
your
specific country
, and connect the end of the cord into the DMIC-20 rear
panel jack marked
+6V
. Secure the locking ring finger tight. The green
LED on the front panel lights when power is applied.
Connecting Inputs
Connect analog microphones to the two connectors marked
LEFT IN
and
RIGHT IN
.
•
Balanced sources are connected to pins 2 (
+
ve
) and 3 (
−
ve
) with
pin 1 and the shell grounded.
•
Unbalanced sources are connected to pin 2 with pins 1, 3 and
the shell grounded. See the “
DMIC-20 Internal Jumpers
”
section for information regarding phantom power jumpers.
Refer to the “
DMIC-20 Operation
” section for instructions on adjusting
microphone sensitivity.
NOTE
If an input is not used its sensitivity should be set to
minimum.
Connecting AES Reference
The DMIC-20 can be synchronized to an alternate output frequency
(from the default frequency) by connecting a valid AES reference signal
to the
AES REF
BNC connector. The
EXT REF
LED on the front
panel lights when a valid reference signal is applied.
To phase lock the unit’s sample frequency to a reference, connect a
reference signal (between 30 kHz and 50 kHz sampling rate) to the
AES
REF
BNC connector. The AES signal output will now phase-lock to the
incoming reference — independent of the DMIC’s default reference
frequency.
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