Diamond SX-400 standing wave wattmeter covering frequencies from 140 to 525 MHz. The meter allows reading of maximum or average power and supports forward power, reverse power, or SWR measurement. It has three power ranges: 5W, 20W, and 200W.

• Frequency range: 140 to 525 MHz
• Power display range: 5W, 20W, 200W
• Accuracy:
  • 5W ±10% (F.S)
  • 20W ±5% (F.S)
  • 200W ±5% (F.S)
• Minimum power for SWR measurement: 4W
• Insertion loss:
  • Less than 0.1 dB (140 to 250 MHz)
  • Less than 0.2 dB (400 to 470 MHz)
  • Less than 0.3 dB (525 MHz)
• Measurement function: RF Forward, RF Reflected, SWR, PEP display
• Connector: PL (SO-239)
• Dimensions: 155W x 63H x 103D mm
• Weight: 540g
• Resistance: 5