Bit Stuffing; Set Lbo; Rx Sensitivity; Figure 5-5. Internal Clock Source - ADTRAN TSU LT User Manual

BIT STUFFING

SET LBO

RX SENSITIVITY

61202060L2-1
Internal Timing
The TSU LT is the source of timing. The TSU LT is configured
to use its own internal oscillator as the source of timing.
Applications include private line driver circuits where one
end is set to network and the other to internal.
See Figure 5-5.
When enabled, Bit Stuffing causes the TSU LT to monitor for
ones (1s) density violations and insert a one (1) when needed
to maintain ones at 12.5 percent. This option should be
disabled if B8ZS is enabled, if Nx56 is selected, or if alternate
channels are being used. All of these other options already
ensure pulse density requirements.
Choices: ENA, DISA
Selects the line build-out for the network interface. In
mode, the TSU LT will set the LBO based on the strength of
the receive signal.
Choices: 0dB, AUTO, -22.5dB, -7.5dB, -15dB
Selects the desired receiver sensitivity setting. The factory
default is
NORMAL
The extended setting should be used only in applications
where the
NORMAL

Figure 5-5. Internal Clock Source

which is adequate for most applications.
setting will not suffice.
TSU LT User Manual
Chapter 5. Configuration Menu
AUTO
5-5