The Tektronix TG 501 Time Mark Generator is a plug-in module for the TM 500 Series Power Module that generates highly accurate timing signals for calibration and verification of timebase accuracy in oscilloscopes and timing-sensitive equipment. The instrument delivers selectable time markers from 5 seconds down to 1 nanosecond in 1, 2, 5 sequence, with a Variable Timing Readout displaying timing errors as a direct percentage—eliminating complex calculations and parallax errors. Synchronized trigger outputs and multiple marker amplitudes accommodate various test configurations.
Technical Specifications
Marker Outputs
• Selectable intervals: 5 s through 1 ns (1, 2, 5 sequence)
• Rotary switch selection: 5 s through 10 ns
• Push-button selection (modified sine waves): 5 ns, 2 ns, 1 ns
• Amplitude (5 s–10 ns markers): >1 V peak into 50 Ω
• Amplitude (5 ns, 2 ns markers): >750 mV peak-to-peak into 50 Ω
• Amplitude (1 ns markers): >200 mV peak-to-peak into 50 Ω; separate output connector
Trigger Output
• Synchronized to marker output from 5 s through 100 ns
• Remains at 100 ns amplitude for all faster markers
Internal Reference (Standard)
• Crystal frequency: 1 MHz
• Stability (0°C to +50°C): ±1 ppm
Internal Reference (Option 01)
• Crystal frequency: 5 MHz
• Stability (0°C to +50°C): ±5 ppm after 1/2 hour warm-up
• Long-term drift: 1 part in 10⁷ per month
• Setability: ±5 parts in 10⁹
External Reference Input
• Acceptable frequencies: 1 MHz, 5 MHz, or 10 MHz (TTL compatible)
• Requires internal jumper configuration
Variable Timing Readout
• Range: ±7.5% minimum
• Display: Front-panel two-digit LED percentage indicator
– Key Features
• 1 nanosecond resolution for high-precision timing measurements
• Independent 1 ns marker output connector
• Temperature-compensated crystal oscillator option for extended stability
• TTL-compatible external reference input (1 MHz, 5 MHz, 10 MHz)
– Compatibility & Integration
Designed exclusively for Tektronix TM 500 Series Power Module systems. All marker outputs require 50 Ω termination for signal presence.
