Adjustment Tools; Factory Selected Components; Related Adjustments; Location Of Test Points And Adjustments - HP 8340B Manual

ADJUSTMENT TOOLS

For adjustments requiring a non-metallic tuning tool, use fiber tuning tool, HP Part Number 871 0-0033.
In situations not requiring non-metallic tuning tools, an ordinary small Screwdriver or other suitable
tool is sufficient. However, use of a non-metallic adjustment tool
Never try to force any adjustment control in the instrument. This is especially critical when tuning
variable slug-tuned inductors and variable capacitors.

FACTORY SELECTED COMPONENTS

Factory selected components are identified with an asterisk on the schematic diagram. The range of
their values and functions are listed
Table 5-4.

RELATED ADJUSTMENTS

adjustments
Any which
ment procedures. It is important that adjustments so noted are performed in the order indicated to
ensure the instrument meets its specifications.

LOCATION OF TEST POINTS AND ADJUSTMENTS

Illustrations showing the locations of assemblies containing adjustments and locations of those
adjustments within the assemblies are contained within the adjustment procedures where they apply.
Also, major assembly and component location illustrations are located in volume

ACCESSING AND STORING CALIBRATION CONSTANTS

Introduction

The HP 8340B/41 B contains three memory areas reserved for calibration constants. These areas are
(1) working, (2) protected, and (3) default. A detailed description of these memory areas is contained in
the introduction of Section 8 under the heading
ments, some calibration constants in the "working memory area" are changed or "adjusted" to
optimize performance parameters. Once these calibration constants are set for best instrument per-
formance, the new values should be copied from the "working memory area" to the "protected
memory area." The printed copy of the calibration constants (located underneath the top cover of the
instrument should also be updated to reflect the new values. Once updated, it should then be returned
to its storage location. This calibration data then may be used later
constants data in the "working memory area."
5-2 Adjustments
5-2. Part Numbers for selected values are located in
in Table
interact with, or are related to, other adjustments are indicated in the adjust-
whenever
"Calibration Constants."
case of loss of valid calibration
in
possible is recommended.
3.
When performing adjust-
HP 8340B/41B