



Product Details
The DIAMOND SX400 is a professional SWR and power meter designed for measuring both standing wave ratio (SWR) and forward/reflected power in VHF and UHF radio systems. It installs between a transmitter and antenna to help evaluate antenna matching and transmission efficiency. The unit features a clear, illuminated analog display with selectable power ranges, making it ideal for base, mobile, and field installations.
Key Specifications
Type: RF SWR & Power Meter
Frequency Range: 140 – 525 MHz
Power Measurement Ranges: 5W / 20W / 200W
Minimum Power for SWR Test: 4W
Connectors: SO-239 (UHF Female)
Measurement Functions: Forward power, reflected power, and SWR
Illuminated meter for easy reading
Power Supply: Requires 12V DC for operation/illumination
Compact and portable design suitable for base/mobile testing and antenna tuning.
- Stock: Out Of Stock
- Model: DIAMOND