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Version $Revision: 1.2 $
Last Update $Date: 1999/05/10 17:17:43 $
HRC CCB Status Approved

OP03 Procedures op03:

HRC Command Sequences

Select PMT #1 on CEA A

Description:

This command sequence is used to change which anticoincidence shield PMT charge amplifier output is connected to the CEA A electronics. The command sequence Power Up HRC on CEA A - SCS #69 will normally connect PMT #1 to the CEA A electronics. If the configuration is changed using Select PMT#2 on CEA A, this command sequence should be used to restore the normal configuration.

High-level pulse commands are used to select CEA-A for PMT#1 and CEA-B for PMT#2.

If PMT #1 is intended to be used, its HV power supply must be turned on after the configuration is changed using either sh1_act.html or sh1_on_and_up.html.

Cautions/Restrictions:

Both PMT HV power supplies must be turned off before this sequence is run.

Flow Diagram

Delta-Time Command Mnemonic Description Cmd Field Mnemonic Data Parameter Telemetry Verifier Expected Value Notes
Verify that both PMT HV power supplies are off
00:00:01.000 2PRA1SL Shield PMT#1 select to use CEA A electronics     2ELEASS PMT1 hlp3b
00:00:01.000 2PRB2SL Shield PMT#2 select to use CEA B electronics     2ELEBSS PMT2 hlp7d

$Log: sh2tosh1.html,v $

Revision 1.2 1999/05/10 17:17:43 juda

changed initial Delta_time to 1 sec - Marked as Approved

Revision 1.1 1999/05/10 12:53:14 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