Tektronix LTA7P Series, Service Manual

Page: 94 / 172

Logic Analyzer Module Adjustment Procedures
5- 8
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
The deskew procedure calibrates and adjusts the timing alignment of the probe
data channels and receivers.
Perform the deskew procedure:
H
Once a year.
H
If you have replaced the LPU board (the probe constants are stored on the
LPU board).
This procedure checks and adjusts the time alignment of all channels. There are
no manual adjustments.
SW test name Deskew
Equipment
required Adjustment/verification fixture and fixture supply (item 2 )
Two P6417 or P6418 Logic Analyzer probes (item 6), OR
One P6434 Logic Analyzer probe (item 7)
Prerequisites Warm-up time: 30 minutes
Test equipment connected as shown in Figure 5--2
Merged modules of the same type must be separated and deskewed
separately
Diagnostics and SELF_CAL pass
Adjustment/verification
fixture
J2
J1
J26
Fixture supply
C2/C3/CK3
Channel/Group
J3
Clock channel
J5
Figure 5- 2: Initial deskew test setup
1. If the logic analyzer application is running, quit the application.
2. Verify that all of the prerequisites listed previously are met for the procedure.
3. Load the performance verification and adjustment software, as described in
the
Software Installation and Removal on page 2--2.
LA Adjustment
Procedure 2:
Deskew