Cirrus Logic CDB5378 - Manual (Page 43)

CDB5378
DS639DB4 43
3.3.4 Test Bit Stream
The Test Bit Stream sub-panel configures test bit stream (TBS) generator parameters. The digitial filter
data sheet describes TBS operation and options.
The DAC Quick Set controls automatically set the Interpolation, Clock Rate, and Gain Factor controls
based on the selected Mode, Freq, and Gain. Additional configurations can be programmed by writing the
Interpolation, Clock Rate, and Gain Factor controls manually.
Any changes made under this sub-panel will not be applied to the target board until the Configure button
is pushed. The Configure button writes the new configuration to the target board and then enables the
data Capture button.
Control Description
DAC Quick Set Automatically sets test bit stream options. Mode selects sine or impulse output mode,
Freq selects the test signal frequency for sine mode, and Gain selects the test signal
amplitude in dB.
Interpolation Manual control for the data interpolation factor of the test bit stream generator.
Clock Rate Manual control for the output clock and data rate of the test bit stream generator.
Gain Factor Manual control to set the test bit stream signal amplitude.
Sync Enables test bit stream synchronization by the MSYNC signal.
Loopback Enables digital loopback from the test bit stream generator output to the digital filter
input.