Tektronix 11A34

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The Tektronix 11A34 is a four channel vertical amplifier for the 11000 Series mainframes.

Two built-in four-pole bandwidth limit filters (100 MHz and 20 MHz) may be activated to reduce unwanted high frequency noise at 24 dB/octave for each channel.

Both coarse and fine deflection factors steps are calibrated. At 1 mV/div, the high resolution calibrated dc offset has a setability of 25 µV and a range of ±1 V (equivalent to 16 bits), giving an effective screen height of 2000 div, and permitting absolute dc measurement accuracies to ±0.4%.

• Four channels
• 1 mV/Div to 10 V/Div calibrated deflection factors in 1% increments
• Input impedance is switchable 50 Ω ±0.5% or 1 MΩ in parallel with 15 pF
• High resolution calibrated Dc offset
  • 1 mV/div to 99.5 mV/div: ±1 V, resolution 25 µV
  • 100 mV/div to 0.995 V/div: ±10 V, resolution 250 µV
  • 1 V/div to 10 V/div: ±100 V, resolution 2.5 mV
• Fast overdrive recovery
  • 1 mV/div to 99.5 mV/div: To within ±(0.3% + 0.1 div) within 50 ns from ±2 V step
  • 100 mV/div to 995 V/div: To within ±1% within 50 ns from ±20 V step
  • 1 V/div to 10 V/div: To within ±1% within 50 ns from ±200 V step
• Typical noise (RMS)
  • 1 mV/div to 1.99 mV/div: 0.12 div
  • 2 mV/div to 4.98 mV/div: 0.06 div
  • 4 mV/div to 9.95 mV/div: 0.025 div
  • 10 mV/div to 10 V/div: 0.014 div
• Input coupling modes: Ac, dc, and off
• Ac coupling low frequency - 3 dB point: 10 Hz or less (1 MΩ input impedance)
• Maximum input voltage
  • 1 MΩ: 500 V (dc + peak ac)
  • 50 Ω: Input automatically disconnects when the input signal exceeds safe limits