Final Cass. Cage Checks

1. Turn on the stepper motor power supplies with the main power switch on the right side of the panel, and the two switches for Filter and Slit stepper motor power.

2. Check that the Filter and Slit stepper motor odometer readings agree with the values displayed on the PSYS main menu. It is usually easiest to turn the wheels by hand to get the right odometer reading, but you can also bring up the Motor Parameters menu ( MP from the main menu, and use the SP and FP commands to reset the software positions.

   Note that the Filters lie at positions are 10, 20, ... 100, and the slits at 100, 200, ... 800.

3. Test the Filter and Slit stepper motors using the MF and MS commands from either the Main or Motor Parameters menu.

   If neither motor turns, check the cabling, especially the ribbon cable going from the PC's parallel port to the back of the stepper motor power supply box. Also check that the Filter motor is not against its limit switch (although the software should give a warning if it detects a limit condition).

4. Set the Slit to 800 (the 30% Neutral Density position), and the Filter at 30 (the 8.8 um filter. Select a camera mode ROM table with about 32 frames per chop (the command RO 8 is correct at this writing), and about a 5 Hz chop frequency ( CF 5). Make sure the GSM is in the Camera mode position.

5. From the PSYS Main Menu, type CA to turn on Continuous Acquisition mode. If the GSM has been properly adjusted, you should see at least some of the detector brightly lit up. Press the ESC key to get back to the menu, and use the PS command to move the GSM left (negative numbers) or right by the desired number of pixels to get the image approximately centered. If the image is nowhere on the array, you should check the GSM and stepper motor settings, and the GSM zero point settings against the table above. If they seem OK and there is still no image, it is easiest to monitor the detector signals with the oscilloscope while you use the PS command to find the signal.

6. Set the filter to Block (10 on odometer) to keep the detector dark.

7. Before you leave the PC to work on the Sun, go back to the PSYS main menu (several carriage returns from any sub-menu), and type rm. This stands for remote, and the PC will display a series of SpectroCam-10... messages as it goes into listen mode and waits for a network connection from GRB.