H. Dannerbauer; 07-Dec-2006

Index TableOfContents(2)

1. Determination of Chopper Offset

• Chopper has to be switched-off and controller disabled

• start PacketRecorder

• start diag. HK with SPEC_Chopper_dhk_imt_OBS using Generic_CUS_script.tcl

• determine chopper offset (chop_offset) from DM_CHOP_CUR_POS
• include the new chopper offset in chopper control parameter set

  • -> PosOffset=(-1)*chop_offset

• stop diag. HK with SPEC_Chopper_dhk_stop_OBS using Generic_CUS_script.tcl

• close PacketRecorder

• switch-on chopper
• load up chopper control parameters including the new offset

  • -> tcl-script CONF_chopper_OBS.tcl with parameter fileU and calUcol

• enable chopper controller in order to upload new control parameter set

  • -> EnDis_chopper_OBS.tcl and parameter onoff ON

2. Chopper Open Loop Measurements

• chopper has to be disabled

• start PacketRecorder

• start script SPEC_Chopper_OpenLoop_MoveAbs_OBS.tcl the parameters chop_max_ma(maximum current in mA), chop_step_ma(current step width in mA) and chop_damptime(plateau duration in sec)

• close PacketRecorder

3. Verify function of Ge:Ga detectors, CREs and detector heaters PTD 0.7.3 (TBD!)

• for detailed test description see PTD_0.7.3 (->file attachment:vergega.pdf) or in CVS

• prerequisites:
  • PACS in spectroscopic mode
  • blue detector heater should be around 2.1 K
• short test description:
  • procedures consists of two tests, one in loss-less compression mode to get raw ramps and one in default mode

  • start with test in loss-less compression mode; detector selection table with 14 randomly selected pixel DXS7602 in both channels; execute CUS script SPEC_detector_fmilt073_detsel_llc_OBS.cus (called by tcl-script Generic_CUS_OBS.tcl); script lasts 1659 seconds

  • do then test in default mode; therefore, execute CUS script SPEC_detector_fmilt073_standard_OBS.cus (called by tcl-script Generic_CUS_OBS.tcl); script lasts 134

4. Chopper Synchronization PTD 0.7.6 (TBD!)

4.1. Spectroscopic Mode (TBD!)

• for detailed test description see PTD_0.7.6_spec (->file attachment:chopsynspec.pdf) or in CVS

• prerequisites:
  • PACS in spectroscopic mode

  • setup Chopper Configuration Parameter for 8 degree; use from CAL-U table CONFChopper the column FM_sa2_81deg

• short test description:
  • we use the SPU mode loss less compression

  • detector selection table with 14 randomly selected pixel DXS7602 in both channels

  • use CUS script SPEC_Chopper_fmilt076spec_detsel_llc_OBS.cus for conducting this test (called by tcl-script Generic_CUS_OBS.tcl); script lasts 865 seconds

4.2. Photometeric Mode (TBD!)

• for detailed test description see PTD_0.7.6_phot (->file attachment:chopsynphot.pdf) or in CVS

• prerequisites:
  • PACS in photometric mode

  • setup Chopper Configuration Parameter for 8 degree; use from CAL-U table CONFChopper the column FM_sa2_81deg; to do this do following:

    • if chopper controller enabled, disable chopper controller with CUS script XXX (called by tcl-script XXX with parameters XXX)

    • do chopper configuration with CUS script XXX (called by tcl-script XXX with parameters XXX)

    • enable chopper controller with CUS script XXX (called by tcl-scritp XXX with parameters XXX)

• short test description:
  • we use the SPU mode loss less compression

  • detector selection table with 14 randomly selected pixel DXS7602 in both channels

  • use CUS script PHOT_Chopper_fmilt076phot_detsel_llc_OBS.cus for conducting this test (called by tcl-script Generic_CUS_OBS.tcl); script lasts 51 seconds