4
Outputs
Inputs
5
8
7
6
Dip Switches
Back Panel:
BACK PANEL
Mic/Line Input Switch (5)
Selects either the Microphone low level input (button out) or the Line high level input (button in). This switch
changes the input on a per channel basis. The low level setting is for signals from 1 mV (-62 dBu) to 160 mV
(-14 dBu). The high level setting is for signals from 80 mV (-19 dBu) to 14.8 V (+25 dBu). Also, by selecting
the high level position (in), the unit will disable the phantom power voltage, overriding the phantom dipswitch
for that channel.
Limit Defeat Switch (6)
Enables or disables the limiter in the preamp. The max level for the A/A-8P is preset at +15 dBu (4.4 V) at
the factory. This level has been optimized for the Media Matrix MM-8840 and MM-8830 input. Enabling the
limiter will assure that the level of the preamp output will not 15 dBu under normal conditions.
Defeating the limit circuitry will allow the A/A-8P to produce up to +26 dBu output levels.
NOTE: The limiter circuit is not provided to replace proper set up of the channel level control with regards to
input/output levels, etc.
Phantom Power Defeat Switch (7)
The A/A-8P pr48 volts DC to pins (+) High and (-) Low of the input connections. This switch will
enable or defeat supply of that voltage to the channel designated by the switch labeling.
NOTE 1: Phantom power is defeated when channel is switched from low level input to high level input.
NOTE 2: When shipped from the factory, the A/A-8P has all "dip" switches set in the default position of
Phantom Power
off (up)
and Limiter
enabled
on each channel
(all switches up)
.
To turn on Phantom Power for each channel, the dip switch for that channel should be pushed down to the
marker indicating "+48 V (channel #) ON". This will enable Phantom Power to that channel only.
To defeat the level limiter on each channel, the dip switch for each channel should be pushed down.
Phantom Power switches are located on the outer edge of each 4-switch dip package located on the rear
panel. Limiter switches are located between the Phantom Power switches. These dip switches are best
accessed with a small screwdriver, which helps to prevent unauthorized tampering with important presets.
Terminal Connection Diagrams (8):
Microphone/Line inputs and Line level outputs are screw terminal and are labeled (+) for High, (-) for Low,
and (SH) for Shield.
+
-
SH
SH
SH
SH
+
+
+
-
-
-
+
-
SH
SH
SH
SH
+
+
+
-
-
-
+
-
SH
SH
SH
SH
+
+
+
-
-
-
+
-
SH
SH
SH
SH
+
+
+
-
-
-
INPUT
OUTPUT
INPUT
OUTPUT
TO AMPLIFIER
MM-8830 or MM-8840
A/A-8P
Содержание 8P
Страница 1: ...1 Cover for A A 8p...
