File $Source: /home/juda/www/hrc_flight/RCS/s_mcp_hv_down.html,v $
Version $Revision: 1.6 $
Last Update $Date: 1999/05/10 18:08:08 $
HRC CCB Status Approved

OP03 Procedures op03:

HRC Command Sequences

HRC-S MCP HV Ramp-down - SCS #88

Description:

This sequence is used to ramp down the HRC-S MCP HV to a stand-by level. This sequence should be used to prepare the HRC-S MCPs for radiation zone entry at perigee passage or to lower the HRC-S MCP HV level before spacecraft dither is deactivated for target acquisition at the end of a slew.

Cautions/Restrictions:

None

Delta-Time Command Mnemonic Description Cmd Field Mnemonic Data Parameter Telemetry Verifier Expected Value Notes
00:00:01.000 2SPCLDS Spectroscopy HVPS current limit disable     2SPCLST DISA sd0400
00:00:01.000 2SPTTHV Set spectroscopy top MCP HV step to 43 2SPTTHV2 43 2SPTPAST 43 sd022b
00:00:01.000 2SPTBHV Set spectroscopy bottom MCP HV step to 54 2SPTBHV2 54 2SPBPAST 54 sd0336
00:00:02.000 2SPCLEN Spectroscopy HVPS current limit enable     2SPCLST ENAB sd0401

$Log: s_mcp_hv_down.html,v $

Revision 1.6 1999/05/10 18:08:08 jhc

corrected initial time delay to 1 sec

Revision 1.5 1998/05/18 15:55:35 juda

corrected telemetry verifier mnemonics for MCP HV Step commands (2SPTPST -> 2SPTPAST and 2SPBPST -> 2SPBPAST)

Revision 1.4 1998/05/13 18:33:11 juda

Added "File" entry to version table

Revision 1.3 1998/05/06 20:46:18 juda

Added OBC SCS #

Revision 1.2 1998/05/06 19:06:23 juda

Marked as approved

Revision 1.1 1998/05/06 12:31:23 juda

Initial revision

Dr. Michael Juda
Harvard-Smithsonian Center for Astrophysics
60 Garden Street, Mail Stop 70
Cambridge, MA 02138, USA
Ph.: (617) 495-7062
Fax: (617) 495-7356
E-mail: mjuda@cfa.harvard.edu