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Specifications
1–16
1780R-Series Service Manual
Table 1–9: Vectorscope SCH Phase Display (Cont.)
Characteristic
Performance
Check Step
Supplemental InformationPerformance Requirement
Input Timing Correct relative SCH operation
with displayed video delayed up
to 2 ms or advanced up to 1.5 ms
relative to external reference.
Display Range
Ext Reference 360_.
Int Reference ±70_. Typically >80_. 56
Table 1–10: CRTs and High Voltage Supplies
Characteristic Performance Requirement Supplemental Information
Performance
Check Step
Waveform Monitor
Viewing Area 80 × 100 mm. Horizontal Scale
12.5 Divisions. Vertical Scale 170
IRE (NTSC), 1.19 V (PAL).
Accelerating Potential Nominally 20 kV.
Orthogonality ±1_. 57
Trace Rotation Range ≥±1_ from horizontal. Typical adjustment range is ≈8_. 57
Vectorscope
Viewing Area 80 × 100 mm.
Accelerating Potential Nominally 13.75 kV.
Orthogonality ±1_. 57
Table 1–11: Power Requirements
Characteristic Performance Requirement Supplemental Information
Performance
Check Step
Mains Voltage Ranges
110 VAC 90 – 132 V.
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220 VAC 200 – 250 V.
Mains Frequency Range 48 – 66 Hz.