Keysight DSOX3012T, Руководство пользователя

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180 Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide
11
Triggers
You can also specify patterns for digital channels using the Bus1 and Bus2
softkeys and entering hexadecimal values. See “Hex Bus Pattern Trigger" on
page 180.
The specified pattern is shown in the "Pattern =" line directly above the
softkeys.
5 Adjust the trigger levels for analog and digital channels by using the softkeys in
the Analyze Menu after pressing [Analyze] > Features and selecting Trigger Levels .
You can also set the threshold levels for digital channels by pressing [Digital] >
Thresholds .
Hex Bus Pattern Trigger
You can specify a bus value on which to trigger. To do this, first define the bus. See
“To display digital channels as a bus" on page 140 for details. You can trigger on
a bus value whether you are displaying the bus or not.
To trigger on a bus value:
1 Select the pattern trigger type and qualifier as described in “Pattern
Trigger" on page 178.
2 Press the Bus1 or Bus2 softkey and use the hex keypad dialog to enter nibble
(hex character) values.
When a hex bus digit contains one or more don't care (X) bits and one or more bits
with a value or 0 or 1, the "$" sign will be displayed for the digit.
For information regarding digital bus display when Pattern triggering see “Bus
values are displayed when using Pattern trigger" on page 142.
NOTE
Specifying an Edge in a Pattern
You are allowed to specify only one rising or falling edge term in the pattern. If you define an
edge term, then select a different channel in the pattern and define another edge term, the
previous edge definition is changed to a don't care.
NOTE
If a digit is made up of less than four bits, the value of the digit is limited to the greatest
number that can be represented by the number of bits.