Tektronix TSG 90 PATHFINDER, Service Manual

Page: 41 / 94

TSG 90 PATHFINDER Service Manual
3–1
Performance Verification and Adjustment Procedures
This section consists of a detailed performance verification procedure to verify
the operation of the PATHFINDER, and an adjustment procedure to return the
PATHFINDER to in-spec operation.
The order of these procedures has been chosen to minimize changes in equip-
ment setup. Performance parameters may be checked in any order. As some of
the calibration steps are interactive, care must be taken when adjusting individual
parameters to ensure that all others remain within specification.
A performance verification checklist begins on page 3 – 2.
Performance verification procedure instructions begin on page 3 – 4.
An adjustment checklist appears on page 3 – 9.
Adjustment instructions begin on page 3 – 10.
Required Test Equipment
The following list of equipment represents the minimum required for the Perfor-
mance Verification and Adjustment procedures. While alternate equipment may
be used, it is not recommended. Alternate equipment must meet the minimum
specifications for the listed equipment. Use of inadequate equipment may result
in faulty measurements or calibration.
Table 3–1: Required Test Equipment
Item Information/Requirements Example
ÁÁÁÁÁÁÁÁÁ
Á ÁÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁÁ
NTSC Video Measurement
Set
ÁÁÁÁÁÁÁÁ
Á ÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁ
For measuring and displaying
line- and field-rate waveforms.
Must be capable of making
differential phase and gain
measurements.
ÁÁÁÁÁÁÁÁÁ
Á ÁÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁÁ
Tektronix 1780 Video Mea-
surement Set.
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
Frequency Counter
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
Must be accurate to within 2.5
Hz out of 5 MHz.
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
Tektronix DC503A; plugs into
a TM503 power mainframe.
ÁÁÁÁÁÁÁÁÁ
Á ÁÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁÁ
NTSC Video Signal Generator
ÁÁÁÁÁÁÁÁ
Á ÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁ
Must be capable of being gen-
locked to the PATHFINDER
Video output, and must have a
Subcarrier output.
ÁÁÁÁÁÁÁÁÁ
Á ÁÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁÁ Á
Á ÁÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁÁ
Tektronix TSG170A.