SoundPals DMIC-24, User Manual

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DMIC-24 User Guide
Page 5
DMIC-24 Installation
This section provides instructions for connecting power, microphone inputs, AES reference, and
digital outputs.
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-24 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 (
+
) and 3 (-) 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-24 Internal Jumpers ” section for information regarding phantom power
jumpers.
Refer to the “ DMIC-24 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-24 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.
Note that the AES REF input is normally terminated internally with 75
Ω
. When it is necessary to
loop reference to several SoundPals, the signal must be terminated only once, and always at the
last unit in the chain. Refer to the “
DMIC-24 Internal Jumpers ” section for information on
changing the input from terminating to bridging.
Connecting Outputs
Connect the output from one of the AES OUT connectors on the front or rear panel, and route it
to the input of the desired destination device. Both AES3 and AES3id outputs may be used
simultaneously.
Using Phantom Power
If your microphone(s) require phantom power, set the Phantom Power Switch to the UP (on)
position, after connecting the mics.
NOTE When phantom power is used, a 500 mA universal power supply (with low
ripple) is required.
CAUTION If phantom power is not required for your microphone(s), be sure that the
Phantom Power Switch is in the DOWN (off) position.
Refer to the “ DMIC-24 Internal Jumpers ” section for information about jumpers that affect
phantom power functionality.