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Appendices ~ Appendix E: Serial Commands
52
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GAIN
This command changes or reports back the input gain for a
channel. The command supports all inputs, outputs, and subbus.
[DEVICE] GAIN <CH> <W> <X> [<Y>]
Explanation
<CH>
CH= 1-4 Parameter to apply to select the microphone
channel
CH= A-D,T Parameter to apply to select the line channel
CH= 1 Parameter to apply to select the subbus
channel
CH= * Parameter to apply command to all
microphone channels
<W>
W=S Parameter to set subbus
W=I Parameter to set input
W= O Parameter to set output
<X>
X= -20 – 20 Parameter to set the level
X=Null Parameter to return the current level
<Y>
Y=R Parameter to indicate relative
Y=A Parameter to set the level absolute
Y= Null Parameter will default to R (relative)
Return Values
The command will return the updated level of the channel in
the same format as the command. The level returned is always
absolute.
Examples
The following command lowers the gain 3dB on microphone
input channel 2.
This command applies only to the unit to which the serial cable
is connected (the device is not specified): GAIN 2 I -3
The following is returned out the serial port, indicating an
updated gain value. GAIN 2 I -12
GATE
This command reports back the microphone gating status of an
AP400. This command is read only.
[DEVICE] GATE
Return Values
The command will return the current status of microphone
gating for a given unit with a hex value.
Example
The following command requests the gate status from device 34.
(When this command was issued, mics 1and 4 were gated on.)
#34 GATE
The following is returned out the serial port, indicating an
updated gate value.
#34 GATE 9
Microphone gating key
Mic # 4 3 2 1 Hex value
0 0 0 0 0
0 0 0 1 1
0 0 1 0 2
0 0 1 1 3
0 10 0 4
0 1 0 1 5
through
1 1 1 1 F