Tektronix LTA7P Series, Service Manual

Page: 147 / 172

Troubleshooting
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
6- 39
Overview of Procedures
Table 6--9 provides a brief overview of the troubleshooting, adjustment,
verification, and calibration procedures.
NOTE
. Calibration constants are stored in the LPU NVRAM. You must always
perform a new self calibration and certification after you replace the LPU
board.
Table 6- 9: Troubleshooting overview
Procedure
Recommended
interval
Purpose When required Documented
Diagnostics (power on
and extended) Incoming inspection
Annually
Verifies basic
functionality. During troubleshooting Power on Diagnostics ,
page 6--32
Adjustment:
self calibration Annually
As needed
Verifies basic
functionality. After acquisition, LPU, or
daughter board replace-
ment When to perform Self
Calibration
, page 2--8
Adjustment: deskew After board replacement
or annually Time-aligns the data
channel After board replacement Performance Verification
and Adjustment Proce-
dures
Functional verification Incoming inspection
As needed
Verifies front end and
basic functionality
including probes After board replacement Performance Verification
and Adjustment Proce-
dures
Performance verification Annually or as needed Verifies advertised per-
formance specifications After board replacement Performance Verification
and Adjustment Proce-
dures
Calibration (certification) Annual recertification Verifies primary refer-
ences After acquisition, LPU, or
daughter board replace-
ment Performance Verification
and Adjustment Proce-
dures