The premium Diamond SX-400N – SWR meter (stationary) and Wattmeter for VHF and UHF Coverage: 140-525 Mhz Measuring power: 5-20-200W Minimum SWR measurement power: 1 W Power supply: 13.8V DC. Dimensions: 155x63x103 mm Weight: 540 g is a commercial-grade, high-integrity inline diagnostic infrastructure instrument precision-engineered to deliver secure voice synchronization, accurate transmission loop monitoring, and absolute transmitter front-end protection across active radio grids. Built with an advanced mechanical movement layout to overhaul small, inaccurate stock indicators that mask impedance mismatches, this premium bench monitor provides real-time tracking metrics to preserve systemic balance. It stands as an essential operational procurement asset for commercial maritime communication hubs, tactical public safety dispatch rooms, telecommunication assembly testing facilities, and high-volume B2B radiocommunication hardware accessory wholesale networks looking to source original factory-genuine test equipment lines.
The advanced internal RF architecture of this specialized instrumentation node supports a continuous broad passband layout spanning an operational coverage: 140-525 Mhz spectrum, making it universally compatible with VHF and UHF network layouts. Built to handle standard tracking configurations safely without inducing localized signal path insertion drops, the internal processing block features a highly responsive multi-tier measuring power: 5-20-200W capacity threshold. Operators can easily adapt visual resolution properties to match varying transceiver outputs using a simple front-panel hardware selector switch that cycles across the integrated scale matrix, allowing deep micro-level tracking accuracy on low-power lines.
To preserve absolute technical system alignment across volatile operational conditions, the specialized internal meter coils handle multi-mode tracking configurations flawlessly. The unit executes a simultaneous forward and reflected power sequence to instantly compute voltage standing wave ratios without requiring complex manual alignment steps, demanding an ultra-sensitive minimum SWR measurement power: 1 W forward envelope to actuate the circuitry. Concurrently, an integrated peak-hold integration matrix allows the operator to perform accurate diagnostic mapping of modulated transmissions during intense tactical communication runs, utilizing a standard power supply: 13.8V DC connection line to actuate the internal meter backlight window illumination.
Housed inside an impact-resistant, heavy-duty sheet-metal shield casing measuring 155x63x103 mm that dampens ambient electromagnetic interference (EMI), this stationary wave meter registers a solid net structural weight: 540 g. The rear bulkhead path is configured with rugged, low-loss N-female coaxial connections engineered to prevent terminal tracking stress lines on ultra-high frequency transmission cables. Pre-calibrated and built to secure active transceiver power amplifiers from reverse-thermal breakdown failures, this turnkey wattmeter system ensures complete out-of-the-box field deployment readiness for your technical workshops.
Technical Specifications
| Technical Parameter | Specification |
|---|---|
| Product Brand Designation | Diamond Antenna (Original Factory Genuine High-Performance Test Bench Line) |
| Hardware Model Designation | SX-400N / SX400N High-Compliance Series |
| Primary Component Classification | Inline Stationary Wave SWR Meter and RF Wattmeter Diagnostic Terminal |
| Active Operational Spectrum | Continuous 140 MHz to 525 MHz VHF/UHF Band Pass Tracking Coverage |
| Total Scaled RF Power Range | 5 Watts / 20 Watts / 200 Watts Maximum Forward Power Handling Core Matrix |
| Minimum SWR Activation Sensation | 1 Watt (1 W) Minimum Forward Power Requirement for SWR Calibration |
| Telemetry Output Reading Profiles | • Radiated (Forward) RF Power Delivery • Reflected (Reverse) RF Power Feedback • Voltage Standing Wave Ratio (VSWR Direct Computation) |
| System Characteristic Impedance | 50 Ohm Nominal RF Link Standardization Profile |
| Primary Input/Output RF Ports | 2x N-Type Female (Low-Loss Threaded Chassis Coaxial Connectors) |
| Auxiliary Operating Voltage | 13.8V DC External Power Line Input for Internal Indicator Backlighting |
| Total Measured Chassis Size | 155 mm (Width) x 63 mm (Depth) x 103 mm (Height) Compact Bench Profile |
| Net Operational Hardware Mass | 540 grams (540 g Rigid Shielded Base Mechanical Weight) |
| Chassis Structure Coating | Rugged Steel Alloy Shield Case with Black Scratch-Resistant Matte Finish |
| Verified Hardware Compatibility Scope | VHF/UHF mobile transceivers, dual-band base station dummy loads, N-plug terminated low-loss coaxes, linear power amplifiers, and vertical omnidirectional antennas |
| Primary Fleet Utility Purpose | Turnkey maintenance bench outfitting, antenna loop line conditioning, real-time SWR mismatch tracking, and transmitter final transistor protection |
