{"id":16255,"date":"2019-03-19T00:00:00","date_gmt":"2019-03-18T23:00:00","guid":{"rendered":"https:\/\/pihernz.com\/product\/diamond-sx400\/"},"modified":"2026-07-13T16:01:17","modified_gmt":"2026-07-13T14:01:17","slug":"diamond-sx400","status":"publish","type":"product","link":"https:\/\/pihernz.com\/en\/producto\/diamond-sx400\/","title":{"rendered":"Diamond SX400 Desktop SWR and Power Meter \u2013 Genuine High-Precision 140\u2013525 MHz Inline VHF\/UHF Cross-Needle Wattmeter with Selectable 5W\/20W\/200W Scaling"},"content":{"rendered":"

The Diamond SX400<\/strong> is a professional-grade, high-integrity RF diagnostic instrument precision-engineered to deliver absolute measurement accuracy and reliable impedance tracking across advanced wireless networks. Operating as a heavy-duty inline test station, this premium Diamond SX400 – SWR meter (stationary) and for VHF and UHF Wattmeter allows field technicians and bench engineers to continuously monitor system performance metrics, dropping the risks of unexpected transmission dropouts or early front-end radio failure. It stands as an essential operational asset for commercial radio base stations, laboratory testing environments, emergency communications dispatch hubs, and B2B specialty telecommunications distributors seeking to source industry-standard RF measurement hardware.<\/p>\n

The internal micro-stripline circuit architecture is optimized for low-insertion loss, providing a completely transparent window across an expansive operational frequency range of 140-525 Mhz<\/strong>. This comprehensive spectrum block guarantees highly accurate calibration tracking for both standard VHF and UHF<\/strong> equipment arrays, including commercial PMR networks<\/strong>, marine bands, amateur repeaters, and tactical aviation setups. Backed by a multi-stage power display rating with three selectable full-scale thresholds at 5-20-200 W, the system handles everything from low-power personal handheld walkie-talkies up to high-output mobile and base transceiver rigs with identical precision across the entire dial face.<\/p>\n

Housed inside a ruggedized, fully shielded metal enclosure built to deflect external electromagnetic interference, the station features an analog illuminated meter matrix for smooth tracking during low-light technical operations. The front control layout integrates physical toggle switches for swift selection between forward power, reflected power, and standing wave calculations, while the rear interface panel features premium gas-tight coaxial connectors to maintain a continuous 50-ohm line match. Delivered as a factory-calibrated diagnostic asset, this premium Diamond test meter ensures immediate out-of-the-box field deployment readiness for high-efficiency communications fleet maintenance.<\/p>\n

Technical Specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Technical Parameter<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Brand<\/td>\nDiamond Antenna<\/td>\n<\/tr>\n
Model Designation<\/td>\nSX400 \/ SX-400<\/td>\n<\/tr>\n
Component Classification<\/td>\nStationary SWR Meter, Forward\/Reflected RF Wattmeter<\/td>\n<\/tr>\n
Active Frequency Range<\/td>\n140 MHz to 525 MHz continuous transmission tracking range (140-525 Mhz)<\/td>\n<\/tr>\n
Power Display Rating Scales<\/td>\nSelectable full-scale metrics at 5 Watt, 20 Watt, and 200 Watt limits (5-20-200 W)<\/td>\n<\/tr>\n
Core Measurement Functions<\/td>\nStanding Wave Ratio (SWR), forward RF output power, and reflected return tracking<\/td>\n<\/tr>\n
System Nominal Impedance<\/td>\n50 Ohms matched passband layout<\/td>\n<\/tr>\n
Rear Interface Connectors<\/td>\nLow-loss SO-239 (UHF Female) terminal matching array<\/td>\n<\/tr>\n
Chassis Structure Finish<\/td>\nAnti-static shielded alloy enclosure frame with professional matte coating<\/td>\n<\/tr>\n
Primary Fleet Utility Purpose<\/td>\nAntenna system tuning, transceiver power verification, inline transmission tracking, and workbench backup inventory<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Package Content<\/h2>\n
    \n
  • 1x Diamond SX400 Stationary SWR and Wattmeter Base Unit<\/li>\n
  • 1x DC Internal Display Illumination Lead Cable<\/li>\n
  • 1x Factory Technical Calibration & Operation Instruction Sheet<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

    SWR\/power meter<\/p>\n","protected":false},"featured_media":21103,"template":"","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","inline_featured_image":false,"_joinchat":[]},"product_brand":[12171],"product_cat":[12289,12287,12275],"product_tag":[12985],"class_list":{"0":"post-16255","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-diamond-antenna-en","7":"product_cat-diamond-medidores-y-frecuencimetros-accesorios-emisoras-en-2","8":"product_cat-meters-and-frequency-meters","9":"product_cat-accesorios-emisoras-en","10":"product_tag-cb-en","12":"first","13":"instock","14":"taxable","15":"shipping-taxable","16":"purchasable","17":"product-type-simple"},"acf":[],"yoast_head":"\nDiamond SX400 SWR Meter and Wattmeter | 140-525 MHz VHF\/UHF<\/title>\n<meta name=\"description\" content=\"Source the genuine Diamond SX400 stationary SWR meter and power wattmeter. 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