Neutral Gas Ion Mass Spectrometer (NGIMS)

Pre-Kiwi Test FC Analog and FC CPU Test and
Verification Procedure



For CONTOUR NGIMS Test Hardware Test





Prepared by:




_________________________
Florence Tan
NGIMS Digital Engineer


Approved by:



_________________________
Jack Richards
NGIMS Instrument Engineer

1.0 Objective

This document describes the procedure for:
* Testing and verifying the NGIMS FC and Analog electronics

2.0 References

2.1 S. Williams CONTOUR 1553 Bus Specifications Version 0.92

2.2 R. Miller NGIMS Spacecraft Simulator Use's Manual 077-0432

2.3 M. Paulkovich Software Requirememts Document, GSFC/NGIMS-FSW-011, CONTOUR/NGIMS Telemetry, GSFC/NGIMS-FSW-06, Functional Requirements for CONTOUR/NGIMS CDS Low-Level Interface Flight Software GSFC/NGIMS-FSW-12

2.4 Test Setup
NGIMS FC CPU breadboard
NGIMS FC Analog Breadboard
NGIMS Spacecraft Simulator
HP1660CS logic analyzer
NGIMS FC debug board
??? ADA tools for software development
[to be added] NGIMS GSE workstation

3.0 Overview

3.1 Software Overview

3.2 Spacecraft Simulator Overview

4.0 Test Procedure

1. FC Analog and FC CPU interface test.
a) Check pin assignments - make sure power thru FC Analog
b) Turn on Power
c) Record current readings
d) Record +15/-15/+5 voltages (need to understand V drops)
e) Verify no data flow
f) Set encounter bit to enable data
g) Record outputs for following AMUX channels:

Channel 81 - Imon 2
Channel 82 - HV1 Mon
Channel 83 - HV5 Mon
Channel 87 - B- Mon
Channel 88 - FC Temp
Channel 89 - +5 Mon
Channel 90 - +15 Mon
Channel 91 -15 Mon

h) Send commands on DCON and record outputs on:
DCON1-4 OS Fil1 On and verify on AMUX input 1
DCON1-5 OS Fil2 On and verify on AMUX input 2
DCON1-6 CS Fil1 On and verify on AMUX input 3
DCON1-7 CS Fil2 On and verify on AMUX input 4
DCON1-8 BA Fil On and verify on AMUX input 5

Other data from FC AMUX includes:
i) Send command from Sim to FC CPU to set DCON and see the values on Logic Analyzer:

SIGNAL	Use	Module
DCON1-0	OS-LOW-EMIS\	OS
DCON1-1	OS_ADJB\	OS
DCON1-2	CS_LOW_EMIS\	CS
DCON1-3	CS_ADJB\	CS
DCON1-4	OS_FIL1_ON	OS
DCON1-5	OS_FIL2_ON	OS
DCON1-6	CS_FIL1_ON	CS
DCON1-7	CS_FIL2_ON	CS
DCON1-8	BA_ON	BA
DCON1-9	BA_LO EMIS	BA
DCON1-10	EM1_SEL	EM
DCON1-11	EM2_SEL	EM
DCON1-12	DCON-SP4	BA
DCON1-13	DCON-SP1	MB
DCON1-14	DCON-SP2	MB
DCON1-15	DCON-SP3	MB

SIGNAL	Use	Module
DCON2-0	Valve 1+ (ON only)	BA
DCON2-1	Valve 1- (ON only)	BA
DCON2-2	Valve 2+( ON only)	BA
DCON2-3	Valve 2- (ON only)	BA
DCON2-4	SPARE_TO_RB1	RB
DCON2-5	SPARE_TO_BA1-1	BA
DCON2-6	SPARE_TO_OS-1 	OS
DCON2-7	SPARE_TO_OS-2	OS
DCON2-8	CS-LOW-EMIS\	CS
DCON2-9	SPARE_TO_CS-2	CS
DCON2-10	DCON_SP-4	MB
DCON2-11	NC
DCON2-12	NC
DCON2-13	NC
DCON2-14	NC
DCON2-15	NC

2. FC with released software verified at GSFC
a) Send commands from SIM to FC CPU to set DACs (flat table)
b) Record voltage settings on FC Analog

3. Check MB pin assignments.



915-NGIMS-KIWI-001.V0
NGIMS pre-KIWI Test Document
Rev.: 0.0
Date: Oct 9 2000
Page: 1