Go Back   Steve's Digicams Forums > Digicam Help > Memory Cards, Microdrives, Card Readers

Reply
 
Thread Tools Search this Thread
Old Aug 15, 2002, 12:42 PM   #31
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,547
Default

I didn't appreciate GE when they sold us to Martin Marietta, and then on to Lockheed...

I'm now in the satellite business still overseeing digital designs: processors, memories, FPGAs & ASICs, but now with a twist of RF for the antenna in the earth stations. Yea, pretty much everything stays the same over the years in digital excepts for the clock speeds, and instead of logic schematics we now do Verilog (or VHDL). Would you believe for example a whole dual channels ATA/IDE controller that we argued about is just 1 line of code, ie a function call?

[Edited on 8-15-2002 by NHL]
NHL is offline   Reply With Quote
Old Aug 15, 2002, 2:41 PM   #32
Senior Member
 
sjms's Avatar
 
Join Date: Jul 2002
Posts: 2,735
Default

such is life. 1 line of code and a lot of hot air from both of us.

EEC M73003 dual channel digital engine control module
in ref to the EEC strictlly 429 bus still for cross channel data link monitoring through the data processing mod digital interface unit. ref boeing ssm 73-21-01 pg101

out of the box into mod 73103 otherwise known as the EDIU we do a little conversion to 629 then its downstream to my favorite the AIMS cabinet out to the eicas displays ref ssm 73-21-11 p101

it works well. you helped build a good product.



[Edited on 8-15-2002 by sjms]
sjms is offline   Reply With Quote
Old Aug 15, 2002, 3:09 PM   #33
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,547
Default

Yea, just what I thought! I remember that EDIU very well, could have easily pull it inside the FADEC, but the airframe simulator weren't ready for it at the time of production startup for the engine... Some contractor must made money on that EDIU unit...

BTW that FADEC also do maintenance monitoring and can check down to the last specs of particle in the oil in its non-volatile memory (Flash - LOL) - a 3rd type, which I didn't mention for fear of confusing the readers of this forum EEPROM!

LOL

[Edited on 8-15-2002 by NHL]
NHL is offline   Reply With Quote
Old Aug 15, 2002, 3:20 PM   #34
Senior Member
 
sjms's Avatar
 
Join Date: Jul 2002
Posts: 2,735
Default

would their have been a good reason to drag a 629 line out there to fancase? cost factors and such. you know we are talking about a $16+milllion motor plus pylon assy costs and they only come in sets of 2.
629 pretty much stays within the airframe.
sjms is offline   Reply With Quote
Old Aug 15, 2002, 3:29 PM   #35
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,547
Default

As I remember it Boeing was pretty adamant about adding anything that can come remotely to shorting out their center/left/and right 629 bus... Utmost reliability is king here, plus 429 traffic has much lower priority, and it won't mess up the control law for the airframe as much! But I remembered mainly because of schedule that this approach was taken...

[Edited on 8-15-2002 by NHL]
NHL is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 3:46 AM.