SoundPals DMIC-24, Руководство пользователя

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DMIC-24 User Guide
Page 4
4) AES Reference LED — the EXT REF LED lights when the sampling frequency is locked
to the externally supplied AES reference signal. The LED is an indication only, not an
alarm.
5) Level Indicator LEDs — provides level indication for each input (calibrated in dB).
When properly adjusted, the following levels are indicated:
•
-60 dB: signal present
•
-20 dB: normal digital reference level
•
-3 dB: approaching clipping
•
0 dB: A/D converter is clipping
6) Power LED — the large green LED below the power jack lights when power is applied.
The figure below illustrates the DMIC-24’s rear panel:
AES OUT AES REF RIGHT IN LEFT IN
44.
1 K
H
Z
M
ADE
I
N
T
H
E
U
S
A
4 5 6 7 1
PHANTOM
PWR
+6V
2
3
1) DMIC-24 Version — the printed legend indicates the default frequency (either 44.1 KHz
or 48 KHz).
2) Power Connector — accepts the power jack from the 6 VDC power supply. Refer to
“External Power” for more information regarding external power.
3) Phantom Power Switch — applies 48 V phantom power to both microphone inputs,
when in the UP (on) position. In the DOWN (off) position, phantom power is not applied.
4) AES Balanced Output — provides AES balanced output via XLR connector. Output is
concurrent with the front panel’s AES unbalanced output (BNC) — both can be used
simultaneously.
5) AES Reference Input — the AES REF connector accepts an AES reference signal
(between 30 KHz and 50 KHz sampling rate). Only timing information is used; audio
content (if any) is ignored. See the “
Connecting AES Reference ” section for information
on switching frequencies via the reference signal.
6) Right Analog Microphone Input — accepts right channel mic level analog input. The
input level is adjustable via the Right Mic Sensitivity DIP switches on the front panel.
7) Left Analog Microphone Input — accepts left channel mic level analog input. The input
level is adjustable via the Left Mic Sensitivity DIP switches on the front panel.