File cepac_sheet1.txt -- Last modified Thu Aug 17 17:29:35 1995

1. INSTRUMENT AND BLOCK NUMBER: CEPAC, Block 1

2. BLOCK IDENTIFICATION: CEPAC Early Switch-on

3. PURPOSE: Early switch-on to enable biasing of EPHIN 
            Li-drifted detectors

4. SUB-BLOCKS
   NR.   IDENTIFICATION
   1.1   CEPAC Switch-on
   1.2   EPHIN high voltage switch-on
   1.3   ESU TCA initialisation
   1.4   ESU TCA adjustment

5. SUB-BLOCKS TABLE:
   NR. - DURATION - PREVIOUS - COMMANDING - TELEMETRY - POINTING
   1.1   0:15         N/A       PROC            M        None
   1.2   0:04         Nom       PROC            M        None
   1.3   0:10         Nom       PROC            M        None
   1.4   0:10         Nom       PROC            M        None

    Note: Duration is without contingency.
          In this and all other blocks telemetry mode is indifferent
          as long as both HK and SCI telemtry is available. 

6. SCHEDULING REQUIREMENTS: 
   Latest on day 5.
   1.4 one day after 1.3
   Note: Here and below I have given the times of the present timeline
         as the latest possible.

7. SPECIAL REQUIREMENTS: ESU in or near thermal equilibrium before 1.1.

8. SUCCESS CRITERIA AND/OR EXPECTED OUTPUT:
    ESU switched on in safe/standby mode, EPHIN in nominal observation
    mode, LION in ON mode, and HK nominal.
    ESU temperature stabilises near to the same value as before switch-on.

9. RELEVANT PROCEDURES:
    1.1 H_FL_ONNOM 
    1.2 H_FL_FOBS
    1.3 H_FL_ETCAINIT
    1.4 H_FL_ETCAINIT

10. CROSS-REFERENCE TO TEST SHEETS: TBS

11. RELEVANT SECTION OF TIMELINE: Day 5, 13:00 - 18:00