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4391A BIRD Wattmeter, Digital, Bird Electronics

4391A  BIRD Wattmeter, Digital, Bird Electronics

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4391A BIRD Digital Wattmeter MFR: Bird Electronics


4391A   BIRD Digital Wattmeter

MFR: Bird Electronics

(Does not come with Elements-Sold Separately Click Here)

4391A, PEP-Dual Element, Power Analyst monitors Peak Pulse Power, Peak Envelope Power, or CW Power during normal equipment operations in the forward or reflected direction. Designed for air navigational aids DME, ATC and other pulsed RF systems such as telemetry, radar, command and control, etc. They need no attenuators, directional couplers or charts..

  • Frequency: 0.45 - 2700 MHz. Power: 100 Mw – 10 kW
  • Reads forward and reflected CW or FM power in watts or dBm, Peak Envelope Power of SSB/DSB and symmetrical AM in watts
  • Calculates SWR, return loss in dB and 5 modulation
  • Shock-resistant keyboard and range switches. RFI protection. Buitl-in international power supply/charger


Item No 4391A
Item Name PEP-Dual Element, Power Analyst
Power Range 100 mW to 10 kW using Bird® Plug-in Elements
Frequency Range 450 kHz - 2.7 GHz
Insertion VSWR with N Connectors 1.05 max. to 1000 MHz
Accuracy Power Readings: ± 5% of full scale CW, ± 8% PEP.
VSWR: ± 10% of reading
% Modulation: (CW power 1/3 or more of full scale)
± 5% (0-90%), ± 10% (90-100%)
Usuable Over Range to 120% of scale (CW, PEP, SWR and Return Loss)
Modulation 25 to 10,000 Hz (Audio)
Pulse Parameter (min.) Pulse width 0.8 µs (100-2700 MHz)
1.5 µs (26-99 MHz) and 15 µs (2-25 MHz)
Repetition Rate 25 PPS and Duty Cycle 1 x 10¯ 4
Connectors QC Type (Female N normally supplied)
Power 100-130/200-260 V, 50/60 Hz, 6 W
Battery Life 8 hours (rechargeable)
Sampling Rate 2 to 3 readings per second
Return Loss ± 0.3 dB to corresponding SWR value
Display 3-1/2 digit, 0.3" LED strobed
Finish Blue Vinyl with Silver Anodized Side Panels
Dimensions (L x W x H)
9-9/16" x 5-7/32" x 4-5/16"
243 x 158 x 110 mm
Weight 5-3/4 lbs. (2.6 kg)
Elements Select (2) elements in a 10:1 power ratio (See Compatible Devices below)
Note Quoted accuracy only when used with other Bird® Products.



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