! File: 2138C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:01:24:12 coverpage: title_1: FOC F/96 DHU OPTIMIZATION (FOC010B) proposal_for: OV/FOC pi_fname: R. pi_mi: J. pi_lname: LAURANCE pi_inst: ESA/FOC hours_pri: 4.00 ! end of coverpage abstract: line_1: Sequence with take FOC histogram via the engineering data stream in order to line_2: electrically focus and optimize the F/96 detector. ! ! end of abstract ! No general_form_proposers block records found general_form_text: question: 3 section: 0 line_1: line_2: The first part of this sequence requires that the camera EHT and the line_3: intensifier EHT be powered off. Then the VPU thresholds will be raised, the line_4: object being to minimize the dark counts. Exposure Logsheet Line 1 performs line_5: the whole sequence including switching the EHTS. The sequence is contained in line_6: A&V block XOV_THRESHOP. This sequence must be scheduled such that there is no line_7: SAA interruption or passage. line_9: Having reset the thresholds to the pre-launch nominal the camera focus coil line_10: current and the intensifier PMA trim coil current will be raised in turn. The line_11: resulting data will define the optimum (focussed) levels for these parameters. line_12: All the data will be taken using the HISTOGRAM MODE and will be contained in line_13: the engineering data stream. The trim coil and focus coil optimizations use the line_14: internal calibration source. The take data flag may be ignored but the FOC line_15: should be transitioned to STANDBY mode during SAA passage. ! question: 5 section: 0 line_1: line_2: Due to sensitivity to noise bursts all sequences should be run without SAA line_3: passage or interruption. If this is not practical the sequences must be line_4: stopped before SAA influence and restarted when influence has completely line_5: finished. line_8: This proposal has scheduling requirements similar to those for Proposal 2135, line_9: "FOC f/48 DHU Optimization (FOC092)." line_11: Schedule this proposal after 2108, FOC101. ! question: 7 section: 0 line_1: line_2: Due to the nature of the sequence all the histogram data may be analyzed, off line_3: line, on conclusion of the test. ! !end of general form text general_form_address: lname: LAURANCE fname: R. mi: J. category: PI inst: ESA/FOC ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: DUMMY pos_1: RA = 0H 0M 0S +/- 1", pos_2: DEC = 0D 0' 0" +/- 1" equinox: 1950 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: DARK config: FOC/96 opmode: HIST aperture: 512X512 num_exp: 1 time_per_exp: 78M priority: 1 req_1: NON-INT; comment_1: PERFORM A&V BLOCK XOV_THRESHOP FOR comment_2: F/96 CHAIN. ! linenum: 7.000 targname: INTFLAT config: FOC/96 opmode: HIST aperture: 512X512 num_exp: 1 time_per_exp: 12M priority: 1 param_1: LED=GREEN-2, param_2: LED-STEP=64, req_1: SEQ 7-11 NO GAP; comment_1: CHANGE FOCUS COIL CURRENT VIA comment_2: PXPDAELB TO COMMAND SETTING 9,1. ! linenum: 8.000 targname: ^ config: ^ opmode: ^ aperture: ^ num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ comment_1: CHANGE FOCUS COIL CURRENT VIA comment_2: PXPDAELB TO COMMAND SETTING 10,0. ! linenum: 9.000 targname: ^ config: ^ opmode: ^ aperture: ^ num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ comment_1: CHANGE FOCUS COIL CURRENT VIA comment_2: PXPDAELB TO COMMAND SETTING 11,0. ! linenum: 10.000 targname: ^ config: ^ opmode: ^ aperture: ^ num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ comment_1: CHANGE FOCUS COIL CURRENT VIA comment_2: PXPDAELB TO COMMAND SETTING 11,1. ! linenum: 11.000 targname: ^ config: ^ opmode: ^ aperture: ^ num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ comment_1: CHANGE FOCUS COIL CURRENT VIA comment_2: PXPDAELB TO COMMAND SETTING 10,1. ! linenum: 12.000 targname: INTFLAT config: FOC/96 opmode: HIST aperture: 512X512 num_exp: 1 time_per_exp: 12M priority: 1 param_1: LED=GREEN-2, param_2: LED-STEP=64, req_1: SEQ 12-17 NO GAP; comment_1: TRIM COIL COMMANDED TO 0; VIA comment_2: PXPDAELB. ! linenum: 13.000 targname: ^ config: ^ opmode: ^ aperture: ^ num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ comment_1: TRIM COIL COMMANDED TO -32; VIA comment_2: PXPDAELB. ! linenum: 14.000 targname: ^ config: ^ opmode: ^ aperture: ^ num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ comment_1: TRIM COIL COMMANDED TO -64; comment_2: VIA PXPDAELB. ! linenum: 15.000 targname: ^ config: ^ opmode: ^ aperture: ^ num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ comment_1: TRIM COIL COMMANDED TO -96; comment_2: VIA PXPDAELB. ! linenum: 16.000 targname: ^ config: ^ opmode: ^ aperture: ^ num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ comment_1: TRIM COIL COMMANDED TO -127; comment_2: VIA PXPDAELB. ! linenum: 16.100 targname: INTFLAT config: FOC/96 opmode: HIST aperture: 512X512 num_exp: 1 time_per_exp: 12M priority: 1 param_1: LED=GREEN-2, param_2: LED-STEP=64, comment_1: CHANGE INTENSIFIER SECOND STAGE FOCUS comment_2: VIA XPDAELB: INTENSIFIER 12KV TO comment_3: COMMAND SETTING 122 AND PMA TRIMCOIL comment_4: CURRENT TO COMMAND SETTING 30. ! linenum: 16.200 targname: INTFLAT config: FOC/96 opmode: HIST aperture: 512X512 num_exp: 1 time_per_exp: 12M priority: 1 param_1: LED=GREEN-2, param_2: LED-STEP=64, comment_1: CHANGE INTENSIFIER SECOND STAGE FOCUS comment_2: VIA XPDAELB: INTENSIFIER 12KV TO comment_3: COMMAND SETTING 186 AND PMA TRIMCOIL comment_4: CURRENT TO COMMAND SETTING 62. ! linenum: 17.000 targname: ^ config: ^ opmode: ^ aperture: ^ num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ comment_1: RETURN SETTINGS TO NOMINAL VIA comment_2: XPDAELB: INTENSIFIER 12KV TO COMMAND comment_3: SETTING 154 AND PMA TRIMCOIL CURRENT comment_4: TO COMMAND SETTING 46. ! ! end of exposure logsheet ! No scan data records found