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Bird Model 4391M RF Wattmeter Technical Specifications
Frequency Range: Depending on the attached external plug-in components (slugs), between 450 kHz and 2.7 GHz.
Power Measurement Range: Depending on the selected component model 100 mW to 10 kW (20% overload rating).
Connection Type: Standard military and industrial N-Type Female (QC quick-change connector design).
Accuracy / Precision: In CW mode, the full scale is ±5%, and in PEP mode, it is ±8%.
Dimensions & Weight: 243 mm x 158 mm x 110 mm / Approx. 2.6 kg (including battery).
Advanced Line Analysis (VSWR / SWR): Automatic ratio calculation from 1.00 to 99.99 and Return Loss measurement from 0 to 40 dB. Reflection Loss measurement from 0 to 40 dB.
Measurement Modulation Types: CW, FM, AM (symmetric % modulation), Peak Envelope Power (PEP) and tracking of narrow pulse signals for SSB/DSB.
Operating Power & Battery: 100-130/200-260 VAC, 50/60 Hz mains voltage or internal rechargeable battery 8 hours uninterrupted portable use.
Outstanding technical advantages include: Durable design that meets military standards, one-touch switching of forward/backward power to the desired unit (W/dBm), instant calculation of AM modulation percentage, and the ability to store minimum and maximum values in memory.
