Low Pass Filter for OPA657 set up
The SXLP-13+ Low Pass filter from mini-circuits works exceedingly well for Laserdisc and VHS RF capture (it is not sufficient for MUSE LD capture). It's a nice little box with a shield housing already on it. PIN 1 is annotated by a small triangle in one corner of the bottom PCB.
If you wish to skip this, the BLP-10.7+ also works very well. It costs more, and has a lower cut-off, but does work well (it is still < 3db attenuation @ 14mhz).
NOTE: the triangle itself is ground / shield. It is the pad adjacent to the triangle that is PIN #1. Do not solder your signal wire to the triangle (ask me how i found this out!).
Pin #1 and Pin #8 are the signal path pins, the rest are all ground (review the datasheet for clarification). I'm not going to do step by step instructions here, as it is pretty straightforward. Connect PIN #1 and PIN #8 to the center of your connectors / cables.
One way, is to cut a BNC/SMA cable in half, and solder the cut ends to the filter inside a project box or something else. Make sure you use the zip ties tight to keep the cable pulling on the filter, and pulling off the pads of the filter:
In an alternate way, i use a simple project box and BNC panel mount connectors (note this is the ad8367 example picture which shows a resistor in the filter, DO NOT include a resistor in the filter for opa657):
