Saving and Recalling Settings
TDS 620A, 640A, & 644A User Manual
To store a setup to disk (optional on the TDS 620A & TDS 640A), press To
File. Then use the general purpose knob to select the exact file from the
resulting scrollbar list. Finally, press the side-menu Save To Selected File to
complete the operation.
Recalling a Setup
To recall a setup stored internally, press SETUP ➞ Recall Saved Set-
up (main) ➞ (Recall Setup 1, Recall Setup 2 ... (side).
To recall a setup stored on disk (optional on the TDS 620A & TDS 640A),
press From File. Then use the general purpose knob to select the exact file
from the resulting scrollbar list. Only files with

.set

extensions will be dis-
played. Finally, press the side-menu Recall From Selected File to complete
the operation.
Recalling a setup will not change the menu that is currently displayed. If you
recall a setup that is labeled
factory
in the side menu, you will recall the
factory setup. (The conventional method for recalling the factory setup is
described below.)
Recalling the Factory Setup
To reset your oscilloscope to the factory defaults:
Press SETUP ➞ Recall Factory Setup (main) ➞ OK Confirm Factory Init
(side).
See

Factory Initialization Settings,

on page A-25, for a list of the factory
defaults.
Deleting All Setups and Waveforms—Tek Secure
Sometimes you might use the digitizing oscilloscope to acquire waveforms
that are confidential. Furthermore, before returning the oscilloscope to gener-
al usage, you might want to remove all such waveforms and any setups used
to acquire them. (Be sure you

want

to remove

all

waveforms and setups,
because once they are removed, you cannot

retrieve them.) To use Tek
Secure to remove all reference setups and waveforms (does not affect mass
storage disk):
Press SHIFT UTILITY ➞ System (main) ➞ Config (pop-up) ➞ Tek Secure
Erase Memory (main) ➞ OK Erase Ref & Panel Memory (side).
Executing Tek Secure accomplishes the following tasks:
Replaces all waveforms in reference memories with zero sample values.
Replaces the current front panel setup and all setups stored in setup
memory with the factory setup.
Calculates the checksums of all waveform memory and setup memory
locations to verify successful completion of setup and waveform erasure.