06/29/17
ICA-202D OPERATION AND INSTALLATION MANUAL
Page 14 of 32
Universal Operator Microphone/Line Input
This input can accommodate a wide range Microphone or Line inputs
The Microphone Sensitivity is adjustable with the 16 Position Rotary Switch
With ~3db/Step for a 45 dB range
By using the Gain Switch, and Jumper options the total Range is -65dB to +20dB
The Signal is processed with an ALC, to assure the Output never exceeds 0dBm
Indicators allow the Microphone Gain to be adjusted to the optimal level
Phantom Power:
Terminating Resistors referenced to +23Volts, Current limited @ 7MA , ON
Terminating Resistors connected to Common,
OFF
Gain Range:
Input Gain reduced 15dB,
LO
Full Gain,
HI
EQ Jumpers (Two):
Both Jumpers, upper position, lowest frequency Roll-off
(Used with most gooseneck and Hanging microphones)
Only MED CUT Jumper Upper Position, Medium frequency Roll-off
(Used with most flush mounted microphones)
Only HI CUT Jumper Upper Position, Highest frequency Roll-off
(Used with most Speakers used as a microphone)
Both Jumpers Lower Position, (Line Input)
~170Hz Roll-off, Sensitivity reduced to –25dBm input for full Output
Notes:
If the Limiting occurs with the Stepped Gain Control on ”0”, “1” or ”2”
There is insufficient Headroom,
use the “LO” Gain Range
For a Balanced Line Level Input
the LO Gain Position is also used
The Accommodation Range for full output is ~ -10dBm to +20dBm (With 10dB of Headroom)
