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© MiMOMax 2013 Four Wire Audio
Interface Manual
2.5
B
ANDWIDTH
R
EQUIREMENTS
The following tables identify the bandwidth requirements of the Four Wire Audio interface. It is
referenced to the selected mode, active audio channels and UART data rate. When audio
channels are dynamic (E & M controlled) the required bandwidth will vary depending on the
active channels at that time.
The required bandwidth must be supported by the connected Radio Units for audio and UART
data to pass successfully.
7 Channel Mode
Required Bandwidth (bps)
Enabled Audio
Channels
No UART
9600 UART
(1)
0 Audio
0
19200
1 Audio
64000
73600
2 Audio
96000
105600
3 Audio
128000
137600
4 Audio
160000
169600
5 Audio
192000
201600
6 Audio
224000
233600
3 Channel Mode
Required Bandwidth
(bps)
Enabled Audio
Channels
No UART
9600 UART
(2)
0 Audio
0
19200
1 Audio
64000
64000
2 Audio
96000
96000
Fixed Channel Mode
Required Bandwidth
(bps)
Enabled Audio
Channels
No UART
9600 UART
(3)
0 Audio
0
N/A
1 Audio
32000
N/A
2 Audio
64000
N/A
NOTE(1)
In 7 Channel Mode where at least one audio channel is active the additional
bandwidth required for UART data is equal to the nominal UART data rate. When no audio
channels are active the required bandwidth is twice the UART data rate as the Control
Header is still required.
NOTE (2):
In 3 Channel Mode the data bandwidth is carried in the control header. When
no audio channels are active the required bandwidth is twice the UART rate otherwise no
additional bandwidth is required. Nominal rates greater than 9600 bps are NOT supported.
NOTE (3):
UART data is not supported in Fixed Channel Mode.
