XRT75L03D Datasheet, PDF (84/134 Pages) Exar Corporation – THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

XRT75L03D
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REV. 1.0.0 THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
BIT NUMBER
NAME
2
LOSMUT Enable
1
Receive Monitor
Mode Enable
0
Receive Equalizer
Enable
TYPE
R/W
R/W
R/W
DEFAULT
VALUE
DESCRIPTION
0
Muting upon LOS Enable - Channel_n:
This READ/WRITE bit-field is used to configure the
Receive Section (within Channel_n) to automatically pull
their corresponding Recovered Data Output pins (e.g.,
RPOS_n and RNEG_n) to GND anytime (and for the dura-
tion that) the Receive Section declares the LOS defect
condition. In other words, this feature (if enabled) will
cause the Receive Channel to automatically mute the
Recovered data anytime (and for the duration that) the
Receive Section declares the LOS defect condition.
0 - Disables the Muting upon LOS feature. In this setting
the Receive Section will NOT automatically mute the
Recovered Data whenever it is declaring the LOS defect
condition.
1 - Enables the Muting upon LOS feature. In this setting
the Receive Section will automatically mute the Recovered
Data whenever it is declaring the LOS defect condition.
0
Receive Monitor Mode Enable - Channel_n:
This READ/WRITE bit-field is used to configure the
Receive Section of Channel_n to operate in the Receive
Monitor Mode.
If the user configures the Receive Section to operate in the
Receive Monitor Mode, then it will be able to receive a
nominal DSX-3/STSX-1 signal that has been attenuator by
20dB of flat loss along with 6dB of cable loss, in an error-
free manner, and without declaring the LOS defect condi-
tion.
0 - Configures the corresponding channel to operate in the
Normal Mode.
1 - Configure the corresponding channel to operate in the
Receive Monitor Mode.
0
Receive Equalizer Enable - Channel_n:
This READ/WRITE register bit is used to either enable or
disable the Receive Equalizer block within the Receive
Section of Channel_n, as listed below.
0 - Disables the Receive Equalizer within the correspond-
ing channel.
1 - Enables the Receive Equalizer within the corresponding
channel.
NOTE: For virtually all applications, we recommend that
the user set this bit-field to "1" (for all three
channels) and enable the Receive Equalizer.
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