Stanford Research Systems SR844, User Manual

Page: 89 / 246

Save and Recall 3-31
SR844 RF Lock-In Amplifier
Save and Recall
Nine setups of the SR844 may be saved in non-volatile memory (setup buffers
1-9). The stored setups include all front panel instrument settings, as well as the
remote interface configurations. The Scan parameters used for manual scans are
saved. The Rel mode data (frequencies, configurations and stored Rel values)
are
not stored. The stored setups do not include any signal history or overload
conditions, nor do they include the internal data buffers.
Save Pressing Save once displays SAVE n where n is the last used setup buffer. A new
setup buffer (1–9) may be selected using the knob. The Reference display shows
YES
if
buffer
n
is in use and
NO
if it is empty.
A second press of the Save key will save the current instrument setup in the chosen
setup buffer. A confirmation message
SAVE n DONE
is displayed briefly.
Any other keypress will abort the save process and display the message
SAVE NOT
DONE .
Recall
Pressing
Recall
once displays
RCAL n
where
n
is the last used setup buffer. Another
setup buffer (1–9) may be selected using the knob. The Reference display shows YES if
buffer n is in use and NO is it is empty.
A second press of the
Recall
key will recall the instrument setup from the chosen setup
buffer. A confirmation message RCAL n DONE is displayed if the recall operation is
successful. RCAL DATA ERR is displayed if no setup was previously saved in the
selected buffer.
Any other keypress will abort the recall process and display the message RCAL NOT
DONE .
If a remote command is received before the second Recall keypress, the remote
command is processed normally and the instrument continues to wait for either knob
input or the second
Recall
keypress.
Important!
•
The recall operation will clear the internal data buffers (see Chapter 4, Data
Storage ).
•
Recall does not affect the stored Rel mode information (see Scan and Rel later in this
chapter). Thus an instrument configuration may be saved at one frequency and
recalled at another frequency, without affecting stored Rel values.
•
Interface setup parameters are not changed.
PRESET
[Shift–Recall] This key sequence restores the instrument to its factory defaults (see earlier in this
chapter).