12 I
2
S Triggering and Serial Decode
308 InfiniiVision 7000B Series Oscilloscopes User’s Guide
When the trigger qualifier requires a pair of values (as with In
Range, Out of Range, Increasing value, or Decreasing value), the first
softkey in the I
2
S Bits Menu lets you select which value of the pair.
In the I
2
S Bits Menu, press the Bit softkey and rotate the Entry knob
to select each bit; then, use the 01X softkey to set each bit value to
zero, one, or don’t care. You can use the Set all Bits softkey to set all
bits to the value chosen on the 01X softkey.
• Signed decimal.
When Decimal is selected, the softkey(s) to the right let you enter
decimal values with the Entry knob. These softkeys can be Data, <, >,
or Threshold depending on the selected trigger qualifier.
6 If the setup does not produce a stable trigger, the I²S signal may be
slow enough that the oscilloscope is AutoTriggering. Press the
[Mode/Coupling] key, then press the Mode softkey to set the trigger mode
from Auto to Normal.
To display I
2
S serial decode, see “I2S Serial Decode” on page 309.
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