Tektronix 1A6 2 MHz Differential Amplifier

The Tektronix 1A6 is a 2 MHz differential amplifier plug-in for Tektronix 500-series oscilloscopes, engineered to amplify small differential signals while rejecting large common-mode voltages. It delivers a common-mode rejection ratio of 10,000:1 up to 100 kHz and handles input voltages to 600 V DC + peak AC, making it suitable for precision measurement and circuit troubleshooting applications where signal integrity and noise rejection are critical.

– Technical Specifications

• Bandwidth: 2 MHz (AC coupling: 2 Hz)
• Deflection Factor: 1 mV/Div to 50 V/Div in 1-2-5 sequence; 15 calibrated steps from 1 mV/Cm to 50 V/Cm
• Input Impedance: 1 MΩ // 33 pF (each input)
• Common-Mode Rejection Ratio: 10,000:1 up to 100 kHz
• Common-Mode Voltage Range: ±15 V
• Maximum Input Voltage: 600 V DC + peak AC
• Variable Attenuation: Continuously adjustable, extending range to at least 125 V/Cm
• Input Coupling: AC, Ground, DC
• Transient Response: 175 ns risetime or less
• Warm-up Time: 30 minutes at 25°C ±5°C for rated accuracy
• Input Stage: Matched pair of 8393 Nuvistors

– Key Features

• Exceptional common-mode rejection across audio and low-frequency ranges
• Dual-range step and variable attenuation for flexible gain selection
• Low input capacitance (33 pF) minimizes circuit loading
• Fast transient response supports clean signal reproduction
• Aluminum alloy chassis with anodized front panel

– Typical Applications

• Differential signal measurement in presence of high common-mode voltages
• Low-level signal amplification in audio and instrumentation circuits
• High-voltage circuit testing and troubleshooting
• AC and DC coupled measurement scenarios

– Compatibility & Integration

Designed for Tektronix 530, 540, 550, and 580 series oscilloscopes (580 series requires Type 81 or 81A Plug-In Adapter). Pairs effectively with the Tektronix Type P6023 X10 probe for high-voltage measurements requiring sustained CMRR performance.