PFANSTIEHL NEEDLES!!RS3P- 42-2791 REPLACES RADIO SHACK NEEDLES, ANOTHER NUMBER FOR THIS NEEDLE IS 4776DE, BIRADIAL (ELLIPTICAL) DIAMOND TIP FLAT FREQUENCY RESPONSE

it's just the frequency response of the RadioShack disco scanner antenna I helped me antenna mounted behind me from the ceiling I kind of isolate it it's connected to a small question Tompa you're supposed to measure these antennas outside but I wanted to keep all the feed line losses as small as possible I don't want to reel my equipment outside so the setup does work but it could alter the response a little bit I have a signal generator sweep generator sweeping between about ten megahertz into one point four gigahertz right now and I have a directional coupler this is a ke di D CK 1010 directional coupler designed for one megahertz to 1,000 megahertz this is a 10 DB coupler normally for measuring a forward power by connecting it up backwards Riggin we can measure the reverse or there's bucket power coming from our antenna this bottom cable right here is going to the spectrum analyzer