Testing Everything

  1. Log into GRB as scuser. Open a Terminal Window and type

    GRB:~> sc10

    Further details on running the GRB software are described in GRB Software.

  2. Enter your name and a directory name such as ``sep10test'' in the pop-up window that appears. If the Sam terminal cable is connected to GRB's serial port B, select the Use Guider checkbox. Click on Accept. The Acquistion and Display programs will finish loading. If selected, the XTerm window to Sam and MIRELLA will automatically open.

  3. Place the mouse cursor in the Display window, then press the Control and L2 keys simultaneously to lock the color map.

  4. Be sure the PC is in listen mode, waiting for a network connection.

  5. Press the PC Connection button to bring up the menu, then press Establish Connection. After 10 or 15 seconds, the Connected message should appear, and several text fields in the main menu should display numerical values which have just been read from the PC. There should be a series of Connect messages displayed on the PC's screen.

    If you get a No Response message on GRB, and there is no interruption of the SpectroCam-10... messages on the PC, then there is probably a hardware or cabling problem. If the cables seem OK, try re-running PSYS on the PC by typing PSYS GRB, to be sure it is listening for a connection from the right ethernet address. There may also be an incorrect address in one of the machine's /etc/hosts file, but you should get help to solve these types of problems.

  6. Try some commands like moving a filter wheel or changing one of the text field values to be sure the connection is active.

  7. Try sending a command to the telescope (such as move 60 arcsec N), and check that the MOVING flag on the telescope monitor appears.

  8. The detector responsivity can be checked against the values in Table 2.4. These were taken with a clean first-surface mirror over the dewar window, the detector bias set to 1.2 V, and a 2 sec Continuous Acquisition integration time. The LN2 can was being pumped, and the Saddlebag and GSM Carousel temperatures were 60 K and 80 K, respectively (the HiRes response is especially sensitive to the temperature).

    Table 2.4:   Camera-Mode Sensitivities
    Mode WLFiltSlitROMChop (Hz)GainBW S(mV) N(mV)
    Camera - Block - 8 4.79 10 3000 161 0.30
    " - 8.8 Open " " " " 2817 0.48
    " - 11.7 " " " " " 6244 0.65
    LoRes - Block - 3 4.31 40 500 121 0.77
    " 11.7 8-14 1" " " " " 3278 1.56
    HiRes - Block - 2 1.98 40 " 435 1.80
    " 10.3 8-14 1" " " " " 2984 3.30

    Table 2.4:   Detector Responses -- Feb. 1995

  9. When all checks are complete, set the filter to Block. If the instrument is to be left unattended for a long period of time, turn off the GSM motor power, all detector power, and the stepper motor power.

  10. If this checkout is being done in the lab, go back to Section Dewar Cooldown and start the LN2 can pumping.