Si3056
Si3018/19/10
Register 40. TX Gain Control 3 (Si3019 Line-Side Device Only)
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Type
TGA3
R/W
TXG3[3:0]
R/W
Reset settings = 0000_0000
Bit Name
7:5 Reserved Read returns zero.
TGA3 Transmit Gain or Attenuation 3.
Function
4
0 = Incrementing the TXG3[3:0] bits results in gaining up the transmit path.
1 = Incrementing the TXG3[3:0] bits results in attenuating the transmit path.
3:0 TXG3[3:0] Transmit Gain 3.
Each bit increment represents 0.1 dB of gain or attenuation, up to a maximum of 1.5 dB.
For example:
TGA3
TXG3[3:0]
Result
X
0
0
0
1
1
1
0000
0001
:
0 dB gain or attenuation is applied to the transmit path.
0.1 dB gain is applied to the transmit path.
1111
0001
:
1.5 dB gain is applied to the transmit path.
0.1 dB attenuation is applied to the transmit path.
1111
1.5 dB attenuation is applied to the transmit path.
Rev. 1.05
75
SILICON [ SILICON ]
