PEF24901HV22XP Lantiq, PEF24901HV22XP Datasheet - Page 50

• Manufacturer Part Number: PEF24901HV22XP
• Manufacturer: Lantiq

Specifications of PEF24901HV22XP

• Control Interface: HDLC
• Lead Free Status / Rohs Status: Compliant

Table 11
Upstream from NT to LT
U1W:
16 times
ternary + + + + + + + + – – – – – – – –
A tone of:
Frequency: 7.5 kHz
Period: 2.13 ms
U1A:
Binary continuous "0"
before scrambling.
No frame, ternary "0"
instead of Barker code
U1:
Binary continuous "0"
before scrambling.
Frame (Transmitting Barker code)
U3:
Binary continuous "1"
before scrambling.
Frame (Transmitting Barker code)
U5:
Binary data from the
digital interface.
Frame (Transmitting Barker code)
U0:
Ternary continuous "0"
No frame, no signal level
Detection of U0, U1, U2, U3 and U4H
• The DFE-T V2.2 detects an U1 or U3 signal element if continuous binary ’0’ or ’1’,
• U4H is recognized if the NT finds at least 16 subsequent binary 1 s in the data stream.
• U0 is recognized if the LT finds one complete frame with continuous zero level. The
Data Sheet
respectively, is found on the descrambler output for at least 8 subsequent U-frames.
Thus these signal elements are detected valid after 8 to 9 ms.
significance of the U0 signal element is given in
Coding of the 4B3T Signal Elements
51
Downstream from LT to NT
U2W
16 times
ternary + + + + + + + + – – – – – – – –
A tone of:
Frequency: 7.5 kHz
Period: 2.13 ms
U2A:
Binary continuous "0"
before scrambling.
No frame, ternary "0"
instead of Barker code
U2:
Binary continuous "0"
before scrambling.
Frame (Transmitting Barker code)
U4H:
Binary continuous "1"
before scrambling with duration of 1 ms.
Frame (Transmitting Barker code)
U4:
Binary data from the
digital interface.
Frame (Transmitting Barker code)
U0:
Ternary continuous "0"
No frame, no signal level
Table
12.
Functional Description
PEF 24901
2002-09-30
DFE-T