矢量示波器 VSM-61

厂家: Videotek
尺寸重量: 13x22x45cm 5.1kg

产品描述：

The VSM-61 is designed for convenience and ease of operation in observing the vector display of video signals. Market-proven traditional features are combined with ergonomically designed controls. Proven, reliable circuit design permits accurate measurement of differential gain and differential phase of color television signals. Selection of inputs (A, B or subcarrier A) and references (A, B or external subcarrier) are easily accomplished via tactile membrane control switches. Rapid A/B comparisons may be made by directly switching between the A and B inputs. Requiring only three rack units (5.25 inches) and one half-rack width, the VSM-61 vectorscope may be mounted in the optional DRC-1 double rackmount case along with Videotek’s TSM-51 or TSM-61 waveform monitor for complete signal monitoring.

特征：

• Inputs：Selectable A to B loop through, subcarrier A,external subcarrier, external PAL pulse (PAL only)
• Phase reference：Selectable A or B and external subcarrier loop through
• Test NTSC：Normal/Alternate Line/Test Circle selectable
• Test Pal/PAL-M：Normal/NTSC Display/Test Circle selectable
• Graticule：Internally etched to eliminate parallax errors
• High brightness CRT：With nonglare contrast filter for enhanced visibility
• Standards available：NTSC, PAL, PAL-M

性能参数：

• Input Return Loss：40 dB minimum, 46 dB typical, 50 Hz to 5 MHz
• Input Isolation：60 dB minimum, 70 dB typical at subcarrier frequency
• Input Level Range：AC：1.0V p-p ±6 dB DC： ±5V
• Front Panel Gain Control Range：12 dB minimum, -6 dB to +6 dB
• Gain Stability：Less than 3% change from 0°C to +50°C, mains varied ± 5% from center of range
• Chrominance Bandwidth：(3 dB points)
• Lower：
  (3.03 MHz ±150 kHz - NTSC)
  (3.88 MHz ±150 kHz - PAL)
  (3.02 MHz ±150 kHz - PAL-M)
• Upper：
  (4.13 MHz ±150 kHz - NTSC)
  (4.98 MHz ±150 kHz - PAL)
  (4.12 MHz ±150 kHz - PAL-M)
• Phase Shift With Input Channel
  Change：≤0.5°
  Phase Control Range：360°Minimum, 400°typical
  Vector Accuracy：≤1°
  Differential Gain：≤1%
  Differential Phase：≤1°

载波频率再生器：

Phase-locked to subcarrier or burst signal present at input selected by reference switches

• Nominal Frequency：
  (3.579545 MHz - NTSC)
  (4.433619 MHz - PAL)
  (3.575611 MHz - PAL-M)
• Pull-In Range：Within ± 50 Hz of nominal frequency
• Pull-In Time：Less than one second for any subcarrier frequency within lock-in range

Phase Shift With Subcarrier

• Frequency Shift：<0.025° per Hz deviation from nominal frequency

Phase Shift with Burst Amplitude

• Change： ≤0.5°per dB change in burst amplitude for 6 dB change from nominal burst amplitude

Phase Shift With Subcarrier

• Source Change：≤0.5°

PAL PULSE INPUT：(VSM-61 PAL and PAL-M only)

• Amplitude Range：1V to 5V p-p
• Polarity：Negative Going
• Wave Shape：Pulse or Square Wave
• Timing：Pulse or Square Wave
• PAL Phasing：Negative transition coincident with start of line sync on +V
• PAL Square Wave：Positive-going transitions coincident with start of line sync on +V

CRT显示尺寸：8 x 10 cm

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