Looks a useful device, SD, but what's that SWR? +/- 2.0V isn't an SWR reading!
To answer frostbite's question:
- if you can get a friend to come round with a laptop (or even a Wifi-enabled PDA) you will find if there is a useable signal;
- otherwise, for about £10 you can get a USB WiFi dongle which you can plug into a convenient USB slot on the PC and have a sniff around the spectrum.