DEVICE DESCRIPTIONS
PROMATRIX System User Handbook 1.1 5-15
Pin-Assignment Of XLRF-Type Connectors:
The pin-assignment of the MIC/LINE input's XLRF-type connector is as follows: pin 1 = screen, pin 2 = positive
conductor, pin 3 = negative conductor. In unbalanced configuration, the pins 3 (-) and 1 (screen) have to be
bridged inside the connection plug.
figure 5.16 pin-assignment of the MIC/LINE IN XLRF-type connectors
Block diagram:
MCLK
BCLK
WCLK
DIN
ANALOG
SUPPLY
DIGITAL
SUPPLY
BOARD
STATUS
& ID
SPI
INTERNAL MONITOR
+12V
-12V
+5V
+24V
BOARD
CONTROL
4
2 CHANNEL
DIGITAL
AUDIO
RES
A
D
PILOT
NRS 90233
IN B
1 2
3
+24V
MIC
LINE
MIC / LINE B
COMPRESSOR /
LIMITER
MIC/
LINE
PILOT B
MON B
MON A
GAIN B
JP4
NRS 90233
IN A
1 2
3
+24V
MIC
LINE
COMPRESSOR /
LIMITER
MIC/
LINE
PILOT A
GAIN A
MIC / LINE A
JP1
1
2
3
4
JP2
1
2
3
4
JP1
5 6
5 6
JP2
LIN
COMP
JP3
LIN
COMP
figure 5.17 block diagram of the 2-channel MIC/LINE input module
Internal Settings:
1. MIC / LINE switching and sensitivity setting for the MIC / LINE inputs
The MIC / LINE input's internal PAD-switches (IN A: S1, IN B: S2) allow switching the channels' sensitivity
between microphone and line level (30 dB). The two GAIN-controls on the module's front panel are provided
to precisely adjust the input sensitivity (range 40 dB).
In addition, two MIC/LINE jumpers (IN A: JP1, pins 5-6, IN B: JP2, pins 5-6) are located on the printed board
assembly allowing the correct configuration of the inputs. When changing a MIC/LINE switch it is important to
change the related jumper correspondingly (open = LINE, closed = MIC).
When shipped, the factory presets are: switches S1 and S2 set to LINE and jumpers JP1 and JP2 are open.
GAIN setting MIC / LINE setting MIC / LINE jumper Input level
Left margin MIC Closed -14 dBu
LINE Open +16 dBu
Center position MIC Closed -28 dBu
LINE Open +2 dBu
Right margin MIC Closed -54 dBu
LINE Open -24 dBu
MIC/
LINE
IN
1
3
2
SHIELD
--
+
BALANCED
1
3
2
LO (-)
HI (+)
SOURCE
UNBALANCED
1
3
2
SOURCE
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