Tektronix 1720SCH NTSC Vectorscope

Tektronix 1720SCH NTSC Vectorscope Simultaneous Channel A/B Display
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Tektronix Test Equipment 1720SCH
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NTSC Vectorscope with SCH Mode
 
Tektronix Test Equipment 1720SCH Features
  • Simultaneous Channel A and B Display
  • Parallax-free Internal Graticules
  • Differential Phase and Gain Measurement
  • Stereo Audio Phase Measurement
  • Vector Center Dot Clamping
  • Remote Control Capability
  • SCH Monitoring
Tektronix Test Equipment 1720SCH Specs
Signal Input (Video and External Reference)
  • Return Loss: >40 dB, 50 kHz to 6 MHz, power on or off
  • Maximum Input: ±5 V DC + peak AC
  • Loop-through Isolation: >70 dB at Fsc
  • Channel Isolation: >70 dB at Fsc

 

Chrominance Bandwidth
  • Upper: -3 dB point, Fsc +500 kHz, ±100 kHz
  • Lower: -3 dB point, Fsc -500 kHz, ±100 kHz
  • Vector Phase Accuracy: within 1.25°
  • Vector Gain Accuracy: within 2.5%, typical
  • Quadrature Phasing: within 0.5°, typical

 

Subcarrier Refrigerator
  • Pull-in Range: Fsc ±50 Hz
  • Pull-in Time: within 1 second

 

Synchronization
  • Internal: Composite video with sync ±6 dB of nominal
  • External Reference: Composite video or CW subcarrier

 

X Y Mode
  • Input: Differential, DC coupled
  • Input Amplitude: 2 to 9 V p-p, adjustable full scale deflection 0 dBm to +12 dBm for 600 ohms system, factory set to 0 dBm
  • Maximum Input: ±15 V peak signal DC
  • Frequency Response: DC to 500 kHz (DC to 100 kHz high-gain mode)
  • X and Y Phase Match: Less than a trace width separation at 20 kHz

 

SCH Mode
  • Accuracy: Absolute: ±5° phase at 25° C; Relative: ±2°
  • Acquisition Time: less than 1 second