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1780R-Series Service Manual
1–11
Table 1–5: Waveform Monitor dG and dP Display
Characteristic Performance Requirement Supplemental Information
Performance
Check Step
Differential Gain
Deflection Factor 5% dG deflects the trace 50 IRE
(NTSC) or 500 mV (PAL) ±5%.
Waveform gain X1, Var. Gain off.
Vector gain adjusted to place
chroma at compass rose.
39
Residual dG (10 – 90% APL) ≤0.2%, last 90% of trace. 39
Calibrated dG
CRT
re
a
d
out
.
39
Resolution 0.1%.
Accuracy 0.1% ±10% of reading.
Range ±5%.
Differential Phase
Deflection Factor 5_ dP deflects the trace 50 IRE
(NTSC) or 500 mV (PAL) ±5%.
Waveform gain X1, Var. Gain off.
Vector gain adjusted to place
chroma at compass rose.
40
Residual dP (10 – 90% APL) ≤0.1_, last 90% of trace. 40
Calibrated dP
CRT
re
a
d
out
.
4
0
Resolution 0.05_.
Accuracy ±0.1_ over any 10_ increment.
±0.1_ over full 360_, Ext. Ref.
±0.2_ burst lock.
Range 360_.
Recursive Filter
Noise Reduction ≈15 dB signal-to-noise reduction
with filter selected. Assumes
white noise source.
4
1
Cross-Luminance Rejection ≈30 dB with filter selected. 0 dB
in dual dP/dG mode.
Unit Sample Response Settles to within 1 dB in <50 lines
with a step in APL. Settles to
within 1 dB in <50 frames in line
select.
Chrominance Bandwidth 500 kHz ±100 kHz baseband.