MPAII Installation and Operations Manual Page 21
Technical or Setup Assistance
Telephone: 800.945.7730 (USA) or 801.975.7200 (worldwide) • Worldwide Web @ http://www.gentner.com
saved and allows you to return to the program. Exiting returns control of the
computer back to DOS.
Program Parameters
There are eleven parameters with which an MPAII can be programmed:
adaptive ambient mode, ambient level, constant gain mode, decay rate, first-
mic priority mode, gate ratio, hold time, last-on mode, off attenuation and PA
adaptive mode.
Adaptive Ambient Mode
The adaptive ambient mode can be turned on and off (Figure 27, below). We
recommend that you keep it ON. If the ambient noise in the room is
constantly changing and the MPAII is unable to track properly, turn this
mode OFF and set the ambient level manually using ambient level.
Ambient Level
This setting is relevant only if the adaptive ambient mode is OFF. Best
results are usually achieved when the adaptive ambient mode is ON.
However, if you need to set the ambient level to a fixed value, turn OFF the
adaptive ambient mode. The ambient level is measured in dBm and ranges
from -105dBm to -39dBm. You can empirically find the ambient level by
following the steps below.
Step 1. Set the gate ratio to zero (write down the current value).
Step 2. Set the ambient level to -72 and press <F7>.
Step 3. If the microphones are ON, increase the ambient level to a value
half-way between the current value and the last-tried highest value and press
<F7>. For the first time through, the new value would be -55. This is
derived by taking the average of the two values:
(-72)+(-39)=55.5
2
Step 4. If the microphones are OFF, decrease the ambient level to a value
half-way between the current value and the last-tried low value and press
<F7>. For the first time through, the new value would be 89. This is derived
by taking the average of the two values:
(-72)+(-105)=88.5
2
Figure 27. Adaptive ambient diagram
