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BHED22748-200 Comtech PST RF Amplifier

The BHED22748-200 is a 400 MHz, 200 W RF amplifier from Comtech PST. Amplify RF and Microwave signals to measure, test, and design circuits. Applications include radio communications, cellphones, EMI testing, and much more.
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Additional Features:

  • Frequency range: 225-400 MHz
  • Output Power: 200 Watts
  • KVA: 2.6
  • Digital Interface: IEEE488
  • Class of Operation: AB Linear
  • RF Input Power: 1mW (0dBm) for full output power
  • RF Input Signals: CW, AM, FM, Phase and Pulse Modulation
  • Harmonics: B.W. <One Octave: -30dBc Max; B.W. <One Octave Even: -20dBc Max; Odd: -12dBc
  • Spurious: -60dBc Max
  • Input VSWR: 2.0:1 nominal
  • Output Load VSWR: 1.3:1, full forward power output 2:1, 0.5dB turndown nominal infinite, 10dB turndown nominal
  • AM Distortion (85% D.O.M.): 10% Max
  • Pulse Rise/Fall Time (typical): 150ns
  • Noise Power Output: -86dBm/Hz typical (model dependent)
  • Maximum RF Input: +8dBm
  • RF Connectors Input: Female Type N, Rear Panel; Output: Female Type N or SC, Rear Panel (model dependent)
  • AC Input: Power Factor Corrected Universal Input 100-240Vac, 50/60Hz
  • Efficiency (AC to RF): 16% typical
  • AM, FM, CW, pulse & phase modulated signal inputs
  • Field-replaceable modules
  • Graceful degradation
  • High efficiency switching power supplies
  • Standard 19” Rack Mount Configuration


  • EW/ECM systems
  • Communication systems
  • AM/FM transmitter boosters
  • TWT replacement
  • RFI/EMI testing
  • High power calibration testing

Load VSWR Protection

Series BHE amplifiers provide load VSWR protection via an electronic power output turndown system employing negative feedback techniques. The system is self-correcting as a function of load VSWR to infinity, at any phase angle. The typical response time is 60 μsec.

Input/Output Overdrive Protection

A leveling loop system protects the amplifiers from input overdrive signals of up to +8 dB. Under an overdrive condition, the output power is controlled at a level 2 to 10% above the rated output power at normal input level conditions. A power overshoot will be present at the beginning of the overdrive condition, which is a function of the amount of overdrive. Note that this characteristic can be used to obtain a 1 to 3 dB output (or more depending on model) power increase for narrow pulses with a low duty cycle.

The image is a representation of the actual product. Please see specifications and data sheet for details.

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