Exercise 3
This exercise is due at the end of class. When you are finished, please call your
instructor over to grade it.
Setting up the GPIB
Using an SR510 Lock-in amplifier, change the DIP switch settings on the back such that
the GPIB address is 23. In order for the DIP switch settings to take effect, you will need
to turn the instrument off and then on again.
- Run the MAX Program. (You may also use the Interactive Control Utility if
you prefer).
- Using the program, verify that the GPIB card is installed and that the GPIB is communicating to
the instrument. If you get a time-out error, check to see that the instrument is turned on
and that the address is correct.
- Select the Lock-in Amplifier instrument (usually device 23). Using the
"communicate With Instrument" option on the pop-up menu, verify that you can change the sensitivity setting to the
following values: 500mV, 10mV, 20m V. The ASCII codes for the
SR510 commands are posted on the Web Page.
- Use the appropriate String commands, read the current setting of the pre-time constant.
- Using the appropriate string commands, get the output reading of the lock-in in units of
volts. Verify that the string returned is the same reading that is on the front panel of
the instrument.