The Anritsu S818A is a portable, handheld cable and antenna analyzer for installation, maintenance, and troubleshooting of wireless communication systems from 3.3 GHz to 18 GHz. It delivers precise measurements of return loss, VSWR, cable loss, and distance-to-fault across high-frequency transmission lines and components. The instrument features proprietary interference immunity enabling accurate field measurements in live RF environments. Its compact, field-hardened design supports demanding operational conditions with up to two hours of battery runtime and external 12V DC power input capability.
## Technical Specifications
**Frequency Range:** 3.3 GHz to 18.0 GHz
**Measurement Capabilities:**
• Return Loss (RL) — signal power reflected from the device under test
• VSWR — voltage standing wave ratio indicating power transfer efficiency
• Cable Loss — signal power attenuation through transmission lines
• Distance-to-Fault (DTF) — fault location and impedance mismatch identification
• Spectrum Analysis — RF system problem identification and resolution
**Performance:**
• Interference Immunity: Proprietary design with superior on-channel and adjacent-channel RF rejection
• Directivity: 40 dB (precision calibration components)
• Warm-up Time: 5 minutes
**Power System:**
• Internal Battery: Rechargeable nickel-cadmium, 2 hours continuous operation
• External Input: 12–15 V DC @ 450 mA typical
**Interfaces:**
• RF Test Port: Precision N female connector, 50 Ω
• RF Input/Spectrum Analyzer: +20 dBm safe input, 50 Ω, +50 Vdc
• Serial Communication: RS-232, 9-pin D-sub (9600 baud, 8 data bits, no parity, 1 stop bit)
**Physical:**
• Dimensions: 25.4 cm × 17.8 cm × 6.1 cm
• Weight: 2.18 kg
• Display: Backlit LCD
## Key Features
• Live-site testing capability with on-channel and adjacent-channel interference rejection
• Field-oriented portability and battery operation
• DTF analysis for rapid fault isolation in cable assemblies and antenna systems
• Precision N connector for direct connection to system components
## Typical Applications
• Cellular and wireless base station installation and commissioning
• Cable and antenna performance verification in operational networks
• Transmission line troubleshooting and fault location
• Return loss and VSWR validation on RF systems
## Compatibility & Integration
RS-232 serial interface (9600 baud) supports integration with test automation and data logging systems. Accepts external 12–15 V DC power for extended field operation or simultaneous battery charging.
