AMX AutoPatch Modula, Instruction Manual, Page: 120 / 191

Microphone Input and Phantom Power Boards
114 Modula Instruction Manual
Microphone Input and Phantom Power Board Specifications
Microphone Input Board Specifications
Applies to Modula microphone input board FG1034-563.
Microphone Phantom Power Board Specifications
Applies to Modula microphone phantom power board FG1034-316.
AMX reserves the right to modify its products and their specifications without notice.
Compression Ratio
Individual connectors on the microphone board can be set at one of four different compression ratios:
1:1 (factory default), 2:1, 3:1, and 5:1. FIG. 72 shows all four compression ratios as well as the limiting
point. If you need to set the compression ratio at a setting other than the 1:1 factory default, follow the
procedure on page 115. If not, go to “Attaching Wires” on page 116.
Specifications
Parameter Conditions Value
Frequency Response 20 Hz to 20 kHz
Input Compression Ratio 1:1, 2:1, 3:1, 5:1
Input Level Differential (balanced) -78 dBu to -25 dBu
Input Impedance 25 kohms
Input Digital Gain Control Range Serial control adjustment -78 dBu to +3 dBu
Connector Type 3-position terminal block
Specifications
Parameter Conditions Value
Internal Phantom power Supplied to microphone with switch +48 V @ 500 mA
FIG. 72
Compression Ratios with Limiting Point
Compression Ratios
+5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
-60
-65
-70
-75
-80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25
Input dBu
O
u
t
p
u
t
d
B
u
1:1
2:1
3:1
5:1
Limiting Point
Compression Ratios