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Duane Benson
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Re: Ah, the Yom Kippur War
Duane Benson   6/3/2014 11:16:25 AM
AD – "I don't think anyone knew how precarious the situation was for the first few days"

At one point in my career, I worked with a former US Air force pilot whom had flown C-141 transports to Israel during that war. He described having to fly a very narrow corridor through the Mediterranean to avoid the airspace of the various countries that didn't want to get involved, or didn't want to let any help in. There was one area that was served by (then) Soviet air traffic control. He said it was quite uncomfortable to be relying on them, when flying in opposition to their allies, and while the possibility of nuclear war was being tossed about.

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Re: Ah, the Yom Kippur War
antedeluvian   6/3/2014 10:42:50 AM

 I don't think I fully appreciated the magnitude of what was happening at the time.

I was there and I don't think anyone knew how precarious the situation was for the first few days.

Max The Magnificent
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Ah, the Yom Kippur War
Max The Magnificent   6/3/2014 10:40:04 AM
I was 16 when the Yom Kippur War took place -- my best friend at that time was Jeremy Goodman who lived about six houses down the road / around the corner from us. Jeremy and I were the only two boys in our area (apart from Robert across the road who was a bit older than us and he was a slimy toady of no account) and we grew up together from when we were little kids (we're still in touch).

I remember when the War started and my mom sent me round with something she'd baked to give to Mr & Mrs Goodman, just to let them know we were thinking about them. And I remember how happy we all were when the war ended. I don't think I fully appreciated the magnitude of what was happening at the time.

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Altium has something
antedeluvian   6/3/2014 8:37:01 AM
I remember Intel used an off-sheet convention on its SBC (Multibus) schematics. Unfortunately, this no longer seems to be practiced, and I know of no current CAD system that provides this option.

Altium treats each sheet of a schematic as an individual sheet which must be added individually to a project. In my opinion this is an archaic approach since items of commonality like the title are not flowed through, bu must be added on each sheet. The interconnection is handled through an hierarchical inteconnection diagram which actually does define which sheet to access.

But for me it is no panacea. I still work with paper and so this is just another piece of paper and an added intermediate step. Nor does it indicate where on the sheet I should look for the net. I suppose we could institute a standard bringing all off-sheet nets to an edge.

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still waiting for good schematic symbols from chip vendors
MWagner_MA   6/3/2014 7:15:08 AM
I pretty much made the same transition through the years as far as schematic tools go.  No we don't have any written standards for schematics (yet), but we also find we need to make many of our own symbols.  I keep trying symbols offered by companies like TI, Microchip, Analog Devices, ect, but either they are not segmented logically (from my perspective) or they don't look good (text in weird places ect or overlapping lines).  When we create symbols, we try to share within our small design group (3 engineers).

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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