Tektronix 2715, User Manual

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2715 User Manual
D–1
Appendix D: Global Resets
Settings on the 2715 can be reset in many ways. Some instrument settings are
always reset, while others are never reset, and still others are reset during certain
reset cycles only. This appendix includes a description of which settings are in
each category, and when each category of settings is reset.
Definitions
These definitions are included to make the following explanations more clear.
Reset
To restore a setting to a previous state. This is what happens to the center
frequency, for example, when power is removed and re-applied. The center
frequency setting is RESET.
Reset Category
Each setting belongs to one RESET CATEGORY, such as center frequency
belongs to the fragile reset category. The categories are described later in this
appendix.
Reset Cycle
An operation that causes one of the RESET CATEGORIES to be operated
on.
Retain
The opposite of RESET. A setting is RETAINED for a particular RESET
CYCLE if its value can be set to any allowable value and remains at that
value after the RESET CYCLE completes.
Reset Cycle Description
Following is a list of all the possible reset cycles:
POWER DOWN/UP CYCLE
Invoked by powering the instrument down and back up again.
INITIALIZE INSTRUMENT SETTINGS CYCLE
Invoked with [UTIL] [0].
RECALL LAST POWER DOWN CYCLE
Invoked with [UTIL] [1] [0].
RECALL FACTORY DEFAULT POWER-UP CYCLE
Invoked with [UTIL] [1] [1].