Lou,
Thanks for
sending that to me. Have any prototypes been tested of the converter?
I didn’t see anything about the switching frequencies. Where will
they fall? Based on what you have, could an estimate be made as to the
level and characteristics of conducted EMI on the bus? That could become
the basis for an EMI requirement for the payloads. Then, if some
reasonable method can be devised to create that conducted EMI, we’ll all
be in a position to test the payload designs against that EMI requirement,
using the test fixture. That would be a great thing!
73,
Juan
From: Louis McFadin
[mailto:[email protected]]
Sent: Saturday, June 30, 2007 2:18
PM
To:
Cc: '
Subject: Re: U-band receiver
changes to reduce EMI and improve thermal regulation
For a look at what is planned for the Eagle Power system, look at the
presentation I prepared for
Lou McFadin
W5DID
On Jun 30, 2007, at 7:05 AM, Juan Rivera wrote:
Juan
Hi John,
I had a chat or
two with Bob Davis about chassis and I think you can bring SMA connectors out
one side and the CAN-Do out the end, but nothing out the back.
Given the
amount of conducted 5 kHz noise I’m seeing, do you think you can filter
it out? Don’t forget, I’m feeding the receiver with bypassed
clean DC from the bench supply at the moment. The CAN-Do switched DC is
nasty.
In your next
version why not raise the switching frequency up and get it out of the passband
completely? What do you think of Howard’s idea of synching the
switching supplies?
Juan