Chris-
thanks for the suggestions. I may try to add the ferrite toroid. It's
just curious that I didn't notice this before. Maybe my power brick is
functioning differently, although it is brand new.
thanks,
eric
On Mon, 18 Jun 2007, Chris Albertson wrote:
--- [EMAIL PROTECTED] wrote:
I'm seeing a strange noise issue with my USRP. I have a simple
antenna
fashioned out of a spool of wire connected to a LF-DC daughterboard
So if (1) antenna is connected and (2) you are using notebook
connected to mains then you see 120Hz noise. So I think the
noise comes from the power brick and enters via the antenna.
Sounds like the notebook power supply or the cables it
connects to radiates RF. Not surprizing at all for a
switching power supply
Try installing some ferrite toroids on both of the cables on
the power brick. Use as many turns as you can through the
toroid.
Another option is to use an antenna that is farther away from the
power brick and bring the signal back using a long coax feed line.
Use the inverse square law to your advantage.
Chris Albertson
Home: 310-376-1029 [EMAIL PROTECTED]
Office: 310-336-5189 [EMAIL PROTECTED]
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