File $Source: /home/juda/www/hrc_flight/RCS/i_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-I MCP HV Ramp-down - SCS #87

Description:

This sequence is used to ramp down the HRC-I MCP HV to a stand-by level. This sequence should be used to prepare the HRC-I MCPs for radiation zone entry at perigee passage or to lower the HRC-I 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 2IMCLDS Imaging HVPS current limit disable     2IMCLST DISA sd0c00
00:00:01.000 2IMTTHV Set imaging top MCP HV step to 42 2IMTTHV2 42 2IMTPAST 42 sd0a2a
00:00:01.000 2IMTBHV Set imaging bottom MCP HV step to 53 2IMTBHV2 53 2IMBPAST 53 sd0b35
00:00:02.000 2IMCLEN Imaging HVPS current limit enable     2IMCLST ENAB sd0c01

$Log: i_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 15:42:28 juda

corrected telemetry verifier mnemonics for MCP HV Step commands (2IMTPST -> 2IMTPAST and 2IMBPST -> 2IMBPAST)

Revision 1.4 1998/05/13 18:28:34 juda

Added "File" entry to version table

Revision 1.3 1998/05/06 20:22:36 juda

Added OBC SCS #

Revision 1.2 1998/05/06 19:08:19 juda

Marked as approved

Revision 1.1 1998/05/06 12:29:10 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