QRF QRBA Quality Rack Isolation Amplifier

The QRF QRBA is a second-generation rack mount isolation amplifier engineered for RF signal conditioning in demanding industrial and broadcast environments. It delivers galvanic isolation between input and output stages, protecting sensitive circuitry from high voltages and common-mode noise while maintaining low distortion and excellent linearity across configurable bandwidth options. The unit houses five independent amplifiers within a 3.5-inch rack mount chassis and supports plug-in hybrid modules for application-specific tuning.

– Technical Specifications

Bandwidth: 200 MHz, 550 MHz, 750 MHz, or 870 MHz depending on model variant.

Gain: 13 dB or 21 dB, with QRCIA variants featuring internal 13 dB pad configuration for unity gain operation.

Isolation: Greater than 62 dB (auxiliary input to main RF input on QRCIA models); greater than 55 dB combining isolation.

Return Loss: 14 dB typical from 860 to 870 MHz (21 dB gain version).

Forward Isolation: Gain of hybrid plus 5 dB.

Power Input: 24 VAC or +24 VDC.

Output Level: FLAT across all models with full analog channel loading.

– Key Features

• Five independent amplifiers per unit
• Newest hybrid technology with separate heat sinks for thermal management
• U.L. approved transformer included
• Forward-facing RF output test point calibrated at −30 dB
• Galvanic isolation protects against high-voltage transients and common-mode interference
• 13 dB internal output pad option for maximum isolation and unity gain
• Plug-in hybrid and accessory support
• Power-doubled configurations available

– Typical Applications

• Motor control systems
• Power conversion and switching circuits
• Data acquisition channels
• Headend systems in cable television networks

– Compatibility & Integration

The QRBA accommodates plug-in hybrid modules and external accessories, enabling frequency and gain optimization for system-specific requirements. Dual RF input configuration (main RF and AUX input) with combined output supports flexible signal routing in multi-channel installations.