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The ETS-Lindgren 6507 Active Shielded Loop 1 kHz - 30 MHz is an active receiving loop antenna designed to perform shielding effectiveness measurements per MIL-STD 285 and NSA-65-6 specifications. A radio frequency preamplifier is built into the base of the antenna designed for use with most 50 Ω receivers. Power for the preamplifier is supplied by rechargeable, sealed lead-acid batteries; a battery charger is included. The charger is switch selectable for 115 VAC/230 VAC, and operates at 50 Hz/60 Hz.
Specifications
| Frequency Minimum: | 1 kHz |
| Frequency Maximum: | 30 MHz |
| 1 dB Comp. Point: | 10 V/m |
| Connectors: | BNC (f) |
| Dynamic Range: | 116 dB @ 1 MHz
76 dB @ 10 kHz |
| Impedance (Nominal): | 50 Ω |
| Pattern Type: | omni-directional |
| Polarization: | linear |
| Power Required: | 13.8 VDC |
| Sensitivity (Typical): | 11 dB(µA/m) @ 10 kHz
-29 dB(µA/m) @ 1 MHz |