Manchester/NRZ Triggering and Serial Decode 30
Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide 469
• SOF - Start of Frame — triggers after the starting edge, between the starting
edge and the sync field.
• Value — triggers on a value you specify, up to 128 bits, after the sync field
(starting with header bits).
Note that the trigger value is always for bits as they arrive (that is, MSB first).
When the decode bit order (specified in the serial decode settings menu) is
MSB first, the decoded value bit order matches the trigger value bit order.
When the serial decode bit order is LSB first, the decoded value bit order is
opposite of the trigger value bit order.
When Value is selected:
i Press the #Bits softkey and set the number of bits in the serial data value,
from 4 bits to 128 bits.
The serial data value is displayed in the Value string in the waveform area.
ii Press the Value softkey and use the keypad dialog box to enter the data
value.
Note that the trigger value is always for bits as they arrive (that is, MSB
first).
When the decode bit order (specified in the serial decode settings menu)
is MSB first, the decoded value bit order matches the trigger value bit
order.
When the serial decode bit order is LSB first, the decoded value bit order
is opposite of the trigger value bit order.
• Manchester Error — triggers if a Manchester encoding error is detected.
You can use the Zoom mode for easier navigation of the decoded data.
For Manchester decode information see “Manchester Serial Decode" on page 470.
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