Bird 4391A RF Power Analyst

Bird 4391A RF Power Analyst
Enlarge Image
Request Quote Print Page

The ruggedly built, multifunction Bird 4391A RF POWER ANALYST features a digital display, microprocessor-based operation, and simplified, push-button control. This wattmeter is well suited to C3, telemetry, two-way communications, avionics and radar, as well as standard radio and television applications.



  • Frequency: 0.45 to 2700 MHz. Power: 100 mW to 10 kW with 20% over-range
  • Reads forward and reflected CW or FM power in watts or dBm, Peak Envelope Power of SSB/DSB and symmetrical AM in watts, and peak power for pulses as narrow as 0.8 μs
  • Calculates SWR, return loss in dB and % modulation
  • Stores peak and null readings to facilitate adjustment of maximum and minimum signal levels
  • Shock-resistant keyboard and range switches. RFI protection
  • Built-in international power supply/charger



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%)
Usable Over-range to 120% of scale (CW, PEP, SWR and Return Loss)
Sampling Rate 2 to 3 readings per second
Display 31/2 digit, 0.3" LED strobed
Modulation Frequency 25 Hz - 10,000 Hz (Audio)
Pulse Parameters (min.) Pulse width 0.8 µs (100 MHz - 2700 MHz)
1.5 µs (26 MHz - 99 MHz)
15 µs (2 MHz - 25 MHz)
Repetition Rate 25 PPS, and Duty Factor 1 x 10-4 min.
Return Loss ±0.3 dB to corresponding SWR value