06/29/17
ICA-202D OPERATION AND INSTALLATION MANUAL
Page 17 of 32
Level and Reach Setup and Adjustment:
ICA-202D Audio Chain Block Diagram
The ICA-202D has two adjustments for the audio, for each Channel, ‘Reach’ and ‘Level’.
Once they are setup, these settings should never need to be adjusted by the user.
The Limiter Threshold is fixed; no matter how great the input level becomes the output level will
not exceed the ‘Limiting Level’ (0dBm)
The ‘Reach’ Control sets the microphone gain. The greater the ‘Reach’ the fainter the input level
that can be heard, and of course the greater the background noise!
The ‘Reach’ is set for normal communications, to be approximately 6 dB into limiting. This
allows the user to move throughout the room, while maintaining an almost constant output level
from the limiter
Setup is accomplished with the use of an Assistant (best) or a Radio, or other sound source.
The sound source should be set at the normal expected level, and position, of the User
Setup each direction, one at a time:
For both Channels, (If the External Reach Control is not being used):
First setup the "Reach" (Pre-limiter, Microphone Gain)
Set the Reach Control to the minimum level, (Red dot, at 6 O'clock position).
Then advance the control CW, one step at a time, until the "Threshold" indicator just flashes.
Then advance control two more clicks (6dB into limiting)
Then set the (Post-limiter, Power Amplifier) Speaker "Level"
Advance the "Level" control CW for the desired listening level
It is not recommended setting the level control into the red dots
If a greater output level is desired, a higher wattage speaker tap is recommend
If the "External Reach Control" is used, it must first be set to the "Normal" Setting
This can be done by Power Cycling the ICA-202D, or by pressing (And Holding) the
"Down/Normal" Switch for approximately 4 Seconds
Then adjust the "Operator Reach" (Pre-limiter, Microphone Gain to the "Normal" setting)
Set the Reach Control to the minimum level, (Red dot, at 6 O'clock position).
Then advance the control CW, one step at a time, until the "Threshold" indicator just flashes
Do not advance the control beyond that point
Next, set the (Post-limiter, Power Amplifier) Speaker "Level"
Advance the "Level" control CW for the desired listening level
