Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://www.eso.org/projects/www.eso.org.projects.ngc/General/16072008-cgeimer.pdf Äàòà èçìåíåíèÿ: Mon Jul 21 00:16:40 2008 Äàòà èíäåêñèðîâàíèÿ: Sun Apr 10 23:43:08 2016 Êîäèðîâêà:

MAIT
What does it mean ?
- Major Area Integration Team ? - Multidisciplinary Accident Investigation Team ? idi li id - McCabe`s Artificially Intelligence Tipper ?
(www.mymait.com)

- Maintenance Assistance and Instruction Team ? - Martial Art Instructor / Trainer ? ....

.... best guess :
- Manufacturing, Assembly, Integration and Testing ! OK, acronym problem solved. Let's build an NGC ...


... starting with the Manufacturing /Assembly !


Procurement
BOM (Bill of Materials)

BOM from design file
Designator
C1_BIAS1 C1_BIAS2 C1_BIAS3 C100_VIDEO1 C100_VIDEO2 C100_VIDEO3 C100_VIDEO4 PW_3

BOM after inspection
Footprint
CC20130805 CC20130805 CC20130805 CC45321812 CC45321812 CC45321812 CC45321812 SOG8

Comment
100nF 100nF 100nF 10uF/25V 10uF/25V 10uF/25V 10uF/25V LT1963AES8 1.5V

Designator
C1_BIAS1 C1_BIAS2 C1_BIAS3 C100_VIDEO1 C100_VIDEO2 C100_VIDEO3 C100_VIDEO4 PW_3

Article No.
A03600 A03600 A03600 A08085 A08085 A08085 A08085 2430

Comment
KerKo 100nF ±10% 50V X7R KerKo 100nF ±10% 50V X7R KerKo 100nF ±10% 50V X7R KerKo 10uF ±10% 25V X7R KerKo 10uF ±10% 25V X7R KerKo 10uF ±10% 25V X7R KerKo 10uF ±10% 25V X7R LT1963AES8 1.5#PBF

Footprint
SMD0805 SMD0805 SMD0805 SMD1812 SMD1812 SMD1812 SMD1812 8SOIC N 1,27mm Pitch

BOM of FEB contains 930 parts


Bill of Material
FEB, AQ32, ...

Deadline Price
Depending on deadline

Delivery time
Broker Service

Quality
Used, leaded...

Placing order Costs Direct order
< 1000

1 Offer
1000

SingleSource Justification Contract & Procurement
1 day to2weeks 1day to 2 weeks

3 Offers
2500

Delivery


Population Assembly
Unpopulated PCB Populated PCB


Population Assembly

Producing PCB
·Providing Population data ·Inhouse Testing of new design

Inspection
·Visible shortsor bridges ·Running DC TEST

Assembly of the Parts
·Providing assembly data ·Providing parts

Inspection
· Visible shorts or bridges · Placement of components


Population Assembly

Assembly of the connectors
·Providing assembly data ·Providing connectprs

Inspection
·Placement of the connectors ·Straight pins etc.

Testing the boards
·DC Test ·Running application


Next we need to take a look at the TWIKI pages....


TWIKI contains everything we need
BIGGEST ADVANTAGES: - HTML based, therefore platform and OS independent. Only browser required. - No excuse not to use it. - Accessible from both sides of the Atlantic. - All NGC related documents are in one place. - Possibility of creating links instead of keeping redundant information in different places.

Testing step 1: Test procedure
- Detailed test procedures for each board are available from TWIKI. - Designers are not the only ones who can test a board. Also less experienced personnel is enabled to do testing, thus minimizing the risk of single point failures. - Instructions how to configure/reconfigure a board for an optical or an infrared system (if applicable) - making it an LRU.


Testing step 2: Board Test tools
- A total of 18 clocks and 20 biases have to be tested over the complete output range. - Manual test would take several hours. - Linux test script automates this test cutting down test time to 10-15 minutes without the need for user intervention. - No additional software is required. Linux has everything you need.

- Errors encountered during test are logged to file for later analysis.


Testing step 2: Board Test tools (cont.)
- End to end noise test for clock/bias and video using the NGC sequencer. - Requires only a cable between clock/bias connector and video input.

- Any noise problem in either clock/bias or video chain will show up in the RTD.


Testing step 3: Test report
- Test report to be filled out after successful configuration and test of each board. - Contains detailed information about the configuration of each board (voltages, Bias setup, ADC configuration, Firmware, Hardware-ID etc.) - Double check of all voltages and settings against the numbers given in the TWIKI test procedure and User manual

- To be attached to the history file of each board.


Integration

MUSE PROTOTYPE SYSTEM

Goals:
- Make sure that all individually tested boards work properly together in the final system. - Fine-tuning of voltages in the final setup taking into account number of boards and final cable length. - Verification of clock/bias and video chain. Using the available test tools this test can be done in ~ 30 - 45min. - TO DO: Create integration test report listing the most important system parameters. To be included in the project's TWIKI page.


Maintenance
- Basic procedure can be found in the ocedu NGC production manual. - All changes made to a board must be documented in the history file. -The TWIKI bug report provides useful feed back to designers in order to avoid Problems in new revisions.

Component is 0603 (1,55 x 0.85mm) Via should not be placed between pads

TO DO: - Compile a "most common failures" ­list for each board based on experience gained during maintenance. - Prepare list for "preventive maintenance"

Example of a board history file