File $Source: /home/juda/www/hrc_flight/RCS/sh1tosh2.html,v $
Version $Revision: 1.3 $
Last Update $Date: 1999/05/10 18:08:08 $
HRC CCB Status Approved

OP03 Procedures op03:

HRC Command Sequences

Select PMT #2 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. This sequence can be run anytime afterward to swap the configuration.

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

If PMT #2 is intended to be used, its HV power supply must be turned on after the configuration is changed using either sh2_act.html or sh2_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 2PRB1SL Shield PMT#1 select to use CEA B electronics     2ELEBSS PMT1 hlp7c
00:00:01.000 2PRA2SL Shield PMT#2 select to use CEA A electronics     2ELEASS PMT2 hlp3d

$Log: sh1tosh2.html,v $

Revision 1.3 1999/05/10 18:08:08 jhc

corrected initial time delay to 1 sec

Revision 1.2 1999/04/22 15:38:37 juda

Corrected description of what the commands do (switch amplifier outputs to designated CEA). Added comment about which sequences to run to raise the PMT HV.

Marked as Approved

Revision 1.1 1998/12/04 21:31:15 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