Performance veri
fi
cation procedures
TLA6400 setup
1.
Start the TLA Application and open the Setup Window.
2.
Click the DM button to default the module.
3.
Click the Synchronous tab and set the following parameters:
a.
Clock Signal: Choose the clock that you connected the DTG output to.
b.
Max Clock Rate: 450 MHz
c.
Global Threshold: Set to 500 mV.
With the 50
Ω
external termination attached at the SMA
fi
xture end, this
sets the logic analyzer threshold voltage levels to one-half the resulting
termination voltage, which should be about 500 mV (not 1 V).
4.
In the Acquisition Options box, select the following:
a.
Acquisition Length: 1K or greater
b.
Storage Options: Normal
5.
Create a new group: right click in the Group Name column.
6.
Select Add Group from the pop-up window. Rename the new group Test.
7.
In the Probe Channels column, enter the names of the two adjacent data
channels that will be used to connect to CH2 of the DTG.
NOTE.
These procedures test two channels. To check more than two channels, be
sure to set the group and trigger word widths to the same amount.
Trigger logic.
To complete the setup, you con
fi
gure a trigger to occur whenever
the two data lines are neither 00 nor 11 (binary). This will capture the condition
when the two data signals are 01 or 10, as they transition to their common values.
To set this up, do the following:
22
TLA6400 Series Product Speci
fi
cations & Performance Veri
fi
cation
