Siretta snyper 3g signal strength testers siretta spectrum antenna kit the snyperlivescanantenna kit from siretta is an accessory to be used with the snyper 3gspectrum signal analyser to establish maximum gsm signal strength direction using livescanproduces a live real time graph on the snyperdisplay showing strength level with direction of the handheld antenna with the antenna held in one hand and the snyper in the other and turning through 360 the operator can see from the real ti