Com-Power 41 inch Active Monopole Antenna AM-741 is used for electric field EMI measurements. It is battery powered to reduce outside interference due to any interconnecting cables. The AM-741 has a integrated preamplifier to increase antenna sensitivity to low level signals. The preamplifier also has low noise to meet the most stringent EMC test standards. It also provides 50 Ohm impedance matching for EMI receiver. The is antenna is required to perform MIL-STD 461 F and TEMPEST testing.

pf datasheet

Frequency Range:	9 kHz - 30 MHz
Flatness:	±1 dB
Output Impedance:	50 Ohm
Connector Type:	BNC (f)
Collapsible Element Length:	41 inches (fully extended)
Base Plate:	24 x 24 inches (60 x 60 cm)
Battery Type	6 V NimH
Charger Input:	6 VDC 500, mA
Tripod mount:	1/4 x 20 inch threads hole
Weight	19 lbs. (8.6 kg)