Trigger Setup
USB Bus Trigger
You can trigger on Sync, Reset, Suspend, Resum e, End of Packet, Token (Address) Packet, Data Packet, Handshake
Packet, Special Packet,orError.
Ethernet Bus Trigger
You can trigg
er on Start Frame Delimiter, MAC Addresses, MAC Length/Type, TCP/IPv4 Client Data, End of Packet,
Idle,oranFCS (CRC) Error.IfyouturnonQ-(VLAN) Tagging, you can also trigger on MAC Q-Tag Control Information.
MIL-STD-1553 Bus Trigger
You can trigger on Sync, Command, Status, Data, Time (RT/IMG),orError.
If you are setting up a MIL-STD-1553 trigger and have made a Trigger On selection of Command, push the lower-bezel RT
Address button to enter specific values of RT Address to trigger on. Push the lower-bezel Command Word Details button
to enter the T/R bit value, Subaddress/Mode value, Word Cou nt/Mo de Code value, and Parity value.
If you are setting up a MIL-STD-1553 trigger and have made a Trigger On selection of Status, push the lower-bezel
RT-Address button to enter specificvaluesofRT Address to trigger on. Push the lower-bezel Status Word Bits button to
enter values for Message Error (bit 9), Instr. (bit 10), Service Req. (bit 11), BCR (bit 15), Busy (bit 16), Subsystem Flag
(bit 17), DBCA (bit 18), Term inal Flag (bit 19) and Parity.
If you are setting up a MIL-STD-1553 trigger and have made a Trigger On selection of Data, push the lower-bezel Data
button to enter specific Data values, and the Parity value.
If you are setting up a MIL-STD-1553 trigger and have made a Trigger On selection of Time (RT/IMG), push the lower-bezel
Trigger When button to set the trigger condition. Push the lower-bezel Times button to set the Maximum and Minimum
times.
If you are setting up a M IL-STD-1553 trigger and have made a Trigger On selec tion of Error, push the lower-bezel Error
Type button to select the type of error to trigger on.
I
2
C, SPI, USB, Ethernet, CAN, LIN, and FlexRay Bus Trigger Data Matching
Rolling window byte matching for I
2
C, SPI, USB, and FlexRay. To use a rolling window to trigger on data, you
defin
e the number of bytes to match. Then the oscilloscope uses a rolling window to find any match within a packet,
with the window rolling one byte at a time.
For example, if the number of bytes is one, the oscilloscope will attempt to match the first byte, second byte, third, and so
on within the packet.
If the number of bytes is two, the oscilloscope will try to m atch any two consecutive bytes, such as one and two, two and
thr
ee, three and four, and so on. If the oscilloscope finds a m atch, it will trigger.
Wit
h FlexRay, USB, or Ethernet, obtain a rolling window match by setting the Byte Offset in the Data menu to Don’t care.
MDO4000 Series Oscilloscopes User Manual 89
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