The Tektronix 067-0508-00 is a 50-ohm amplitude calibrator designed to generate precise square-wave voltage sources for calibrating test equipment and precision measurement systems. Operating from 115 or 230 VAC (50–60 Hz) with adjustable line voltage taps, this fixture delivers calibrated amplitude levels with ±0.25% overall accuracy across a 12 mV to 1.2 V output range. The unit employs a precision constant-current source, 50-ohm termination, attenuator, switching transistor, and steering diodes to maintain consistent output impedance of 50 ohms throughout operation.
Technical Specifications
• Output voltage range: 12 mV to 1.2 V adjustable in increments maintaining constant 6-division display
• Additional 2 V output level for sampling bridge linearity verification
• Output impedance: 50 ohms
• Overall accuracy: ±0.25%
• Output signal: Square-wave
• Power input: 115 or 230 VAC, 50–60 Hz
• Transformer primary taps for line voltage adjustment: 105–125 V and 210–250 V in 10 V increments
• Output connector: GR-874
– Key Features
• Front-panel test point for monitoring attenuator input level
• TRIG OUT connector for external trigger coupling to oscilloscope vertical input
• Pretrigger output with sufficient delay for zero-percent zone establishment on select oscilloscope models
• Attenuator design ensures constant 6-division display scaling across all output levels
• Precision termination and constant-current source architecture enables stable 50-ohm source impedance
– Typical Applications
• Amplitude calibration of 50-ohm impedance equipment
• Precision comparison and transfer measurements
• Digital readout unit calibration
• Sampling bridge frequency response verification
• High-impedance input calibration when properly terminated to 50 ohms total load
– Compatibility & Integration
Designed as a primary calibration source for 50-ohm systems. The 067-0515-00 precision 50-ohm terminator is recommended for use with this fixture. For high-impedance vertical inputs on test scopes, external 50-ohm termination (±1% accuracy minimum) is required on the signal cable.
