426 Keysight M8000 Series of BER Test Solutions User Guide
7 Setting up Patterns
This type of pattern contain:
• Symbol: 128B/132B coding having 128 bit in one symbol.
• Attributes: It has the following attributes:
• Mask - This attribute only affects the Data In ports.
• Squelch - This attribute only affects the Data Out ports.
• Scrambler Reset - This attribute is used to reset the scrambler LFSR
(Linear feedback shift register).
• Scrambler Pause - This attribute is used to pause the scrambler for
some special symbol.
• Scrambler Bypass - This attribute is used to bypass the scrambling
over the symbol. If this bit is enabled, it will not allow scrambling
over the symbol.
• Scrambler Bypass Byte 0 - If this bit is enabled, it does not allow
scrambling over the symbol.
• Do DC Balancing - This attribute is used to set DC balancing over
the symbol.
• Reset DC Balancing - This attribute resets the DC balancing state.
• Send Scrambled State - This attribute specifies whether to send the
scrambled state.
• Reset Parity - This attribute is used to reset the parity bit.
• Pause Parity - This attribute is used to pause the parity bit.
• Start of frame - This attribute enables/disables the start of frame
marker.
• Framing 0 1 2 3 - This attribute enables/disables the start of frame
marker.
• Data - Specifies the data bit.
You can edit selected data using the keyboard.
To encode a 128B/132B symbol, 144 bits (18 bytes) are used:
Table 60
Bit offset range Bit (range) name Description
3:0 Framing Framing bits
131:4 Data Data
132 Mask Mask (if present, ignored on DataOut)
133 Squelch Squelch (if present, ignored on DataIn)
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