Bird 4381 Thruline RF Directional Wattmeter, .45 - 2700 MHz

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The Bird 4381 is a digital RF wattmeter for two-way communications, avionics, C³, radar and many other applications. At the push of a button, this new wattmeter can perform the following functions:

  • Read incident and reflected CW and FM power in watts or dBm
  • Read incident and reflected peak-envelope-power of SSB/DSB and symmetrical AM in watts
  • Read incident and reflected peak pulse power as narrow as 50 micro-seconds in watts
  • Calculate SWR, dB return loss, percent modulation
  • Remember peak and valley readings when adjustments for maximum or minimum signal levels are made
  • Over-range at least 20 percent beyond nominal full scale