[RFI] DSC Alarm Panel 75 meters/False Alarms
Jpaleng at cs.com
Jpaleng at cs.com
Wed Nov 17 09:55:09 EST 2004
The usual problem is RF pickup on the long sensor lines. Several of our
customers have had success by putting split beads on these lines right at the
electronics box. Our largest is 1/2" hole but you can split the cable into two or
more so they will fit into the bead. Bead impedance is low on 75 but apparently
the RF impedance of the electronic circuit is also low so they work. Easy to
try. -- Jack, K6NY, Palomar Engineers
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