458 Keysight M8000 Series of BER Test Solutions User Guide
7 Setting up Patterns
When defining a pattern containing signal squelching for usage with
M8062A it is required to always squelch two bits in a row. This is
necessary because the pattern will be downloaded independently into
Channel 1 and Channel 2 of the M8041A module driving the M8062A.
By squelching a single bit the whole word will be squelched. Effective
word widths used by the hardware depend on the Symbol Width
setting in the Sequence Editor.
The selection thereby results in the following hardware word width for
M8041A/M8062A.
Table 63 Hardware word width corresponding to selected symbol width
For signal squelching to work reliably, it is required that the resulting
duration of the squelched blocks is at least 20 ns in length. Otherwise, the
Electrical Idle In of the M8062A might miss a signal from the M8041A‘s
Ctrl Out A port.
The minimum granularity of a squelch signal is limited by the currently
used word width of the M8041A/M8062A combination.
Symbol Width [bit] M8041A Word Width [bit] M8062A Word Width [bit]
164 128
10 80 160
130 130 260
132 132 264
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