Storing And Recalling Setups - Stanford Research Systems SR844 User Manual

1-18 Storing and Recalling Setups

Storing and Recalling Setups

The SR844 can store 9 complete instrument setups in non-volatile memory.
Press Shift then Recall (PRESET) to restore
1
factory presets.
2 Press Sensitivity Down twice.
Press Time Constant Up twice.
Press Save.
3
Use the knob to select setup number 3.
4
5 Press Save again.
Press Shift then Recall to restore factory
6
presets.
Press Recall.
7
8 Use the knob to select setup number 3.
Press Recall again.
9
SR844 RF Lock-In Amplifier
This restores the SR844 to its factory presets.
The factory preset configuration is:
1 Vrms sensitivity.
100 ms, 12 dB/oct time constant.
Internal Reference at 1.00 MHz.
Ω
Signal Input 50 .
Change the lock-in setup so that we have a different
setup to save.
These keypresses select 100 mV sensitivity and 1 s
time constant.
The CH1 and CH2 displays show SAVE n where n
is a number from 1 to 9.
The knob selects the setup number (shown in the
CH2 display).
The second time Save is pressed completes the
operation. The message DONE is appears briefly in
the Reference display. Any other key pressed at this
time aborts the Save.
The current setup is now saved as setup number 3.
The sensitivity and time constant revert to 1 V and
100 ms respectively. Now let's recall the setup that
we just saved.
The CH1 and CH2 displays show RCAL n where n
is a number from 1 to 9.
The knob selects the setup number.
The second time Recall is pressed completes the
operation. The message DONE is appears briefly in
the Reference display. Any other key pressed at this
time aborts the Recall.
The time constant and sensitivity should have
reverted back to their saved values of 100 mV and
1 s respectively.