On Thu, 12 Jun 2003 22:46:19 +0100, Timothy Box wrote:
>=A0On a board I am doing I am restricted to where I can place the LC=
D=20
>=A0connector and a PCB mounted BNC aerial connector.
>=A0
>=A0The BNC has to over lay the lcd pin sockets. While it is not a=
=20
>=A0problem as the LCD is on 1 side and the BNC there might be a nois=
e=20
>=A0issue.
>=A0
>=A0The obvious thing is grounding of the pins on the case of the BNC=
=20
>=A0which I know I have to resolve but the my main worry is noise get=
ting
>=A0in on the RF signal. The two pins under the BNC are the backlight=
=20
>=A0which might be PWMed through a mosffet to control brightness.
>=A0
>=A0Any thoughts?

If you are really stuck with the mechanical constraints you've shown,=
=20
I'd consider a cable assembly between LCD module and PCB. You could=
=20
either use a flat flex cable to relocate the PCB connection in the=
=20
negative Y direction or use a discrete wire cable and locate the=20
connector almost anywhere on your PCB you'd like.

I normally don't like to do this (I'd rather use a solid mechanical=
=20
connector system), but I have occasionally used a cable is situations
like yours.

I agree with the potential noise problems too. Unless you have the ti=
me=20
and money to risk a second spin on the PCB, I think I'd relocate the=
=20
LCD connection on the PCB.

Matt Pobursky=20
Maximum Performance Systems

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