4381 Bird Digital Wattmeter (Pull)

4381 Bird Digital Wattmeter (PULL)

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

• 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 or SSB/DSB and symmetrical AM in watts, and peak power for pulses as narrow as 0.8us Calculates SWR, return loss in dB and % modulation Stores peak and multi readings to facilitate adjustment of maximum and minimum signal levels Shock-resistant keyboard and range switches. RFI protection
• Power Range: 100mW to 10kW using Bird Plug-in Elements
• Frequency Range: 450 kHz to 2.7 GHz
• Insertion VSWR: with N connectors 1.05 max to 1000 MHz
• 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: 3 1/2 digit, 0.3” LED strobed
• Modulation Frequency: 25 to 10,000 Hz (audio)
• Pulse Parameters: (min.) Pulse width 0.8us (100-2700 MHz) 1.5us (26-99 MHz) 15us (2-25 MHz) Repetition Rate 25 PPS, and Duty Factor 1 x 10-4min.
• Return Loss: ±3% dB to corresponding SWR value