Teledyne LeCroy Serial Data Debug Solutions - Manual (Page 93)

Operator's Manual
919586 RevA 93

RJ is similar to I 2 S with the exception that the LSB occurs at the end of the frame sync, as follows.
RJ Variant Timing Format
A UDIO B US T RIGGER D ETAIL S ELECTIONS
The following topic provides specific control settings for an AudioBus Trigger.
The previously numbered AudioBus trigger sections generally correspond with the following explanations.
1. A UDIO B US A UDIO V ARIANTS

The different AudioBus variants are closely based on the I 2 S standard. Each variant has a bus consisting of
at least 3 lines - Serial Clock (Bit Clock), Left/Right Clock (Word Select), and at least one multiplexed data
line.
2. S OURCE S ETUP

DATA and BCLK (BIT CLOCK) - The pop-up dialog is used to select the appropriate channel or EXT inputs
for each. Set these fields up with caution or your trigger may not function correctly.

Polarity and WS (Word Select) - These fields are enabled or disabled based on the selected AudioBus
variant.

Sync on - This field is enabled when either LJ or RJ variants are selected. Click the field and select either a
Falling or Rising value.

Threshold (Trigger) - Adjust the vertical level for the trigger. Much like an Edge trigger, a user must
specify the level used in order to process the incoming signals and determine whether the desired serial
data pattern is meeting the set trigger condition. This value is used for DATA, BCLOCK, and WS signals.
3. T YPE

Data - Applies a trigger to data on either left or right channels. When selected, the Data Condition field
on the Data Pattern Setup section is enabled and may be used.

Mute - Applies a trigger when your data level is below a specified noise floor for a specified number of
frames. When selected, the Setup Format section does not appear and the Data Pattern Setup section is
replaced with a Mute Setup section which includes Noise Floor and Duration (# of Frames) fields.

Clip - Applies a trigger when your data level exceeds a specified clip level for a specified number of
frames.

Glitch - Applies a trigger when the rise time between two adjacent audio samples exceed the specified
threshold.

Rising Edge - Applies a trigger when your data level is rising at a specified threshold.

Falling Edge - Applies a trigger when your data level is falling at a specified threshold.