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Installation ~ LCD Programming
Technical Services Group ~ 1-800-283-5936 (USA) ~ 1-801-974-3760
If your room has very low ambient noise, set the decay rate to fast. This
reduces the effects of echo and reverberation. If you hear ambient noise “swoosh”
down while the microphones decay, set this value to either medium or slow.
Manual Ambient
This setting is relevant only if the adaptive ambient mode is off on a mic channel (see
Adaptive Ambient on page 22). The best results are usually achieved when the
adaptive ambient mode is off. However, if you need to set the ambient level to a fixed
value, turn off the adaptive ambient mode on the desired microphone channels. A
manual ambient setting is a global setting and will affect all mics equally which are
set to adaptive ambient off. The ambient level ranges from 0dB to -70dB with the
default setting at -30dB.
To determine ambient level
1. Check your current gate ratio from the Gate Parameters menu. Make a note
of the value. Example: “Gate Ratio: 15.”
2. Select Manual Ambient from the Gate Parameters menu. Press Enter to
change the dB value.
3. Scroll up or down through the dB values until the mic gates on (gating
is indicated when the mic LED lights up). Individual room conditions
will determine whether you need to scroll up or down. When the LED
flickers, the dB value indicated on the LCD display is the ambient level
of the room.
4. Deduct the gate ratio value from the ambient level value you have just
determined. For example, if the ambient noise level of the room is
identified as -50dB and the gate ratio is 15, the manual ambient setting
would be -35dB.
RS-232
There are four RS-232 parameters that can be adjusted via the front panel LCD (see
Figure 2.12). These parameters are baud rate, flow control, modem mode, and clear
password.
Baud Rate
This parameter allows for the AP800’s RS-232 port communication rate to be
controlled. There are three settings: 9,600 (default), 19,200, and 38,400 baud (bps).
To set the baud rate, scroll through the three settings to select the desired baud rate,
then press Enter.
Any combination of
channels can be set in
adaptive ambient or
manual ambient modes. Only
individual channels cannot be set
with both modes active.
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Figure 2.12. RS-232 submenu