Bird 4381 Digital Wattmeter Used good condition * No longer available for export MFR: Bird Electronics, USA SKU: 4381-2
The 4381 Wattmeter reads both forward and reflected power output for CW, symmetrical AM, FM, and SSB. The meter is also capable of calculating SWR,dB return loss and the percent modulation of a device.
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
Features
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)
