Tektronix 1745A NTSC/PAL Waveform/Vector Monitor

Tektronix 1745A NTSC/PAL Waveform/Vector Monitor
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Tektronix 1745A NTSC/PAL Waveform/Vector Monitor Tektronix 1745A NTSC/PAL Waveform/Vector Monitor Tektronix 1745A NTSC/PAL Waveform/Vector Monitor
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Features

  • Composite or Component Waveform Monitoring
  • Composite Vector Display
  • Picture Display
  • Stereo Audio Display
  • Time Code Phasing and Amplitude
  • Eight Video Inputs

 

Applications

  • Analog Baseband Video Monitoring for Broadcast and Post Production Applications

 

Characteristics

Waveform Vertical Deflection
  • Deflection Factor: 1.0 V (0.2V x5 gain, 0.1 v x10 gain)
  • Variable Gain Range: 0.2x to 1.4x
  • DC Offset Between Channels: <1 IRE (7 mV)
  • 75 ohms Loop-through Return Loss: ≥40 dB to 6 MHz
  • Frequency Response
    • Flat: Within ± 2% to 10 MHz (x1 Gain)
    • Luminance Filter Gain of Flat Response: Within 1% @ 50 kHz, < 3 dB attenuation @ 1 MHz, ≥ 34 dB attenuation @ Fsc
    • Chrominance Filter, Bandwidth 1.5 MHz ± 0.3 MHz: Gain within 1% of flat response @ Fsc, attenuation > 25 dB @ 2 x Fsc
    • Differentiated Step Filter: >40 dB attenuation @ Fsc
  • Transient Response: Preshoot; Overshoot; Ringing; Field Rate Tilt; Line Rate Tilt;
    Differential Gain: 1% or better; Pulse-to-bar Ratio: 0.99:1 to 1.01:1
  • Pix Out:
    • Gain Unity
    • Frequency Response: ±3% to 6 MHz when terminated in 75 ohms
    • Differential Gain: ≤ 1%
    • Differential Phase: ≤ 1%
  • DC Restorer:
    • Slow ≤ 10%, Fast ≥ 95% attenuation at 50 Hz and 60 Hz
    • Offset Error: < 1 IRE (7 mV)
    • Fast Settling Time: ≤ 6 video lines

 

Waveform Horizontal Deflection
  • Sweep: Synchronization triggered by Horiz and Vert sync pulses.  Freeruns without input
  • Timing Accuracy 1 Line, 5 µs/div: ±1%
  • 2 Line, 10 µs/div: ±1%
  • Linearity 1 or 2 Line: ±1%
  • Magnified Sweep Accuracy: 1 line x25
  • 0.2 µS/div: ±1%; 2 line x10
  • 1.0 µS/div: ±1%
  • Magnified Sweep Linearity, 1 or 2 Line Magnified: ±1%
  • External Horizontal 0.5 V/div: ±2%
  • RGB/YRGB: Staircase input amplitude 12 V maximum, DC + peak AC not to exceed -12 V or +12 V, 10 V = 9 div ± 1 div display.  Field or line rate front panel selectable

 

Cursor Signals
 
  • Waveform Mode Accuracy:
    • Voltage: ±0.5%
    • Timing: ±0.5% for line rate sweeps
  • Voltage Mode Accuracy:
    • Amplitude: ±0.5 IRE (0.5%)
    • Phase

 

Calibrator Signals
  • Waveform Squarewave
    • Amplitude: 1.0 V ±0.5%
    • Frequency: 100 kHz ±0.1%
  • Waveform Sinewave
    • Amplitude: 1.0 V ±0.5%
    • Frequency: Nominal subcarrier for standard in use

 

Vector Mode
  • Input Requirements: 1 Vp-p ±6 dB composite video signal or black burst
  • Chrominance Bandwidth: 1 MHz ±200 kHz
  • Display: Phase accuracy within 1.25°.  Gain accuracy within 2.5%.   Quadrature phasing within 0.5°
  • Subcarrier Regenerator: Pull-in Range:
    • NTSC: ±50 Hz
    • PAL: ±10 Hz
    • Pull-in Time: ≤2 S