APPENDIX AVI212 Especificações descarregar pdf (Página 43)

Gaia

GAIA.ASU.SP.ESM.00007

Issue 2.00

Page 43 of 79

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GAIA.ASU.SP.ESM.00007 (Avionics SCOE Req Iss 2).doc

Acq FSS

Digitize Q1

00 01 10 11

Digitize Q2 Digitize Q3 Digitize Q4

Read FSS

SpaceWire BUS

FSS Address

EIU Acquisition

1ms

< 15.0 ms

1ms 1ms 1ms

Detector Voltage

Simulation

Q1 Valid

VAL

Q2 Valid

VAL

Q3 Valid

VAL

Q4 Valid

VAL

Figure 3.6-4: FSS Acquisition Timing

AVI-2823/CREATED/T

The value applied at the Detector Voltage Simulation output shall be one of Q1 - Q4 or T1 - T4, in

accordance with the address acquired from the EIU (A0 - A2) - see Table 3.6-6.

AVI-2825/EIU-3020/T

The acquisition of FSS Address Lines (A0 - A2) from the EIU shall be asynchronous, triggered by a

change in the FSS Address.

AVI-1601/EIU-3020/T

The value of Selected Detector Voltage (Q1 - Q4, or T1 - T4) sent to the EIU shall be valid within T

VAL

ms of the appropriate address being sent by the EIU, where T

VAL

= < 1ms.

AVI-1598/CREATED/T

In open-loop test mode, the values of (Q1 - Q4, T1 - T4) shall be set by the local MMI or CCS (Test

Procedure/Command Line).

AVI-2826/CREATED/T

In open-loop test mode, the value of the 'Sun Presence' signal shall be calculated by the Avionics

SCOE as the sum of the (Q1 - Q4) voltages.

AVI-1600/CREATED/T

In closed-loop test mode, the values of (Q1 - Q4, T1 - T4) and the 'Sun Presence' signal shall be

determined by the RTS (FSS Models).

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