Geemarc LoopHEAR 160 Manual page 6

LOOP ANTENNA & PERFORMANCE
For optimum performance, use the loop
antenna (optional accessory) or a local
area loop with the following
specifications:
Loop resistance 0.3 to 1 ohm
Loop Impedance 1.3 ohm at 1.6 KHz
For local area loops, use wire 0.5 to 1.5
mm2 or 22 to 16 AWG
The area covered by the unit is about
80cm ± 60° from the center point of the
loop antenna/coil
ANTENNA
120°
5
0.8m