AMBE-1000 Digital Voice Systems, Inc., AMBE-1000 Datasheet - Page 39

• Manufacturer Part Number: AMBE-1000
• Manufacturer: Digital Voice Systems, Inc.

0x13EC
Header
The AMBE-1000 is not recommended for new designs.
(bits 15-8)
Control_1
0x02
ID
MSB’s
0x00
0x7F
0x08
0xF8
0x80
Please refer to the AMBE-2000/2020 product line.
Control_0 Control_1 Control_2 Control_3
Table
Table 4-K Input / Output Gain and Silence Threshold Configuration Frame
Format
Table 4-L shows some example values for the 8 MSB’s and 8 LSB’s of Control_1. Note
that the scaling of these inputs is distinctly different, the Input gain is on a log scale,
and the Output gain is on a linear scale. Remember to fill in the default settings for the
values of the unadjusted parameters.
Table 4-L Input / Output Gain Configuration
Figure 4-B Input / Output Gain Control Block Diagram
When using an ID value of 0x02, the Control_1 value sets the Silence Threshold
level.
exceed to be deemed a non-silence framed.
voiced energy must be below for the encoder to output a silence frame. Although this
value is adjustable DVSI highly recommends leaving this value at the recommended
default of 0x01F4.
default value must be inserted as well to maintain normal operation.
4-G
Input Gain (dB) = A * 0.75dB
Table
4-L
-128
127
This 16-bit value determines a threshold value that the voiced energy must
-8
A
8
0
The AMBE-1000 is not recommended for new designs.
Channel
0x01F4 0x0000 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX
Please refer to the AMBE-2000/2020 product line.
Input Gain
-96.00 dB
95.25 dB
-6.00 dB
0.00 dB
6.00 dB
(dB)
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Remember that if either of the gain controls are adjusted this
AMBE-1000
Default Gain
Gain = 2.0
Gain = 0.5
MAX Gain
MIN Gain
Notes
page 39
Encoder
Decoder
Control_1
(bits 7-0)
0x80
LSB’s
0xC0
0xFF
0x40
0x00
Output Gain
Input Gain
Restated, it is the threshold that the
Control
Control
Voice Data Bits
Output Gain = B / 128
128
255
192
64
B
0
Converter
A/D -D/A
Output
1.00
Gain
1.99
1.50
0.50
0.00
Default Gain
MAX Gain
MIN Gain
Notes