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3–2
VITS100 NTSC VITS Inserter Instruction Manual
Table 3–1: Program channel characteristics (Cont.)
Characteristic Information
Phase Matching of Inserted Test Signal to
Program Video
±1° (Program Sync and Burst Normal Level)
Pulse to Bar Ratio 100%±0.5% (Typically within ±0.25%)
Signal to Noise Ratio >70 dB (Unweighted Filter at 5 MHz. Measured 91 dB on VM700A, relative to reference)
Table 3–2: Test Signal and Black Burst general characteristics
Characteristic Information
Frequency Response ±1% to 5 MHz
±5% to 10 MHz
Luminance Amplitude Accuracy ±1%
Chrominance-to-Luminance Gain ±0.5%
Chrominance-to-Luminance Delay ≤5 ns
Diff Phase ≤0.3°
Diff Gain ≤0.3%
Line Tilt ±0.5%
Output Impedance 75 W
Signal to Noise Ratio >78 dB (Measured on a VM700A with an unweighted 5 MHz lowpass filter.)
Spurious Signals (5 MHz 50 MHz)
>55 dB down
Pulse to Bar Ratio 100% ±0.5%
K Factor (K2T) 0.3% (Typically 0.2%)
Crosstalk ≥60 dB down
DC Offset 0 V DC ±10 mV
SCH Phase Accuracy 0 ±5° (< ±2.5° typical)
Luminance Rise Time 140 ns ±20 ns
Chrominance Rise Time 300 ns ±35 ns
Table 3–3: Black and Gray Test Signal characteristics
Signal Information
0% Black 0 IRE Luminance with sync and burst; see Figure 3–1.
7.5% Black 7.5 IRE Luminance with sync and burst; see Figure 3–2.
50% Gray 50 IRE Luminance with sync and burst; see Figure 3–3.