isd-t360sb ETC-unknow, isd-t360sb Datasheet - Page 89
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isd-t360sb
Manufacturer Part Number
isd-t360sb
Description
Manufacturer
ETC-unknow
Datasheet
1.ISD-T360SB.pdf
(112 pages)
- Current page: 89 of 112
- Download datasheet (2Mb)
2—SOFTWARE
TUNE
Sets the value of the tunable parameter identified by index (one byte) to the 2-byte value,
parameter_value . This command may be used to tune the DSP algorithms to a specific Data Access Ar-
rangement (DAA) interface, or to change other parameters. If you do not use TUNE, the VoiceDSP pro-
cessor uses default values.
If index does not point to a valid tunable parameter, ERR_PARAM is set in the error word.
NOTE
Example
The tables 2-4 through 2-13 describe the tunable parameters, their index numbers and their default val-
ues, grouped by their functionality.
ISD
TUNE 17 02BC
Byte sequence:
Description:
70
86
Index
The tunable parameters are assigned with their default values on application of power. The INIT
command does not affect these parameters.
The index parameter of this command should be in hexidecimal numbers while the index of the
tunable parameter should be a decimal number.
SWAGC enabling:
AGC_enable_flag
Input threshold for gain
modification:
AGC_VAD_THR
Parameter Name
Table 2-4: TUNABLE PARAMETERS: Software Automatic Gain Control
Microcontroller
VoiceDSP
Set the minimum period for busy detection to 700 (7 seconds).
Tune
index
Enables the SWAGC. Value 1 to enable, value 0 to disable.
Different values of the tunable parameter can be used for the
compression and Speakerphone algorithms. In order to change
the value of the tunable parameter use the TUNE command prior
to entering each of the two algorithms.
Required value for speakerphone mode is 0 - disabling the
SWAGC.
Legal values: 0,1
Power threshold for Voice activity detection. Only signals stronger
than the threshold are considered voice and are increased by the
SWAGC algorithm. The default value is equivalent to –38dBm input.
Each multiplication of the value by 2 adds approximately 3dB to
the input level.
Different values of the tunable parameter can be used for the
compression and Speakerphone algorithms. In order to change
the value of the tunable parameter use the TUNE command prior
to entering each of the two algorithms.
Legal values: 0 - 32767
parameter_value
Description
15
15
17
17
02
02
ISD-T360SB
1
4
Default
BC
BC
2-53
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