Atec Tektronix-VM5000 - Manual (Page 10)

Automated Video Measurement Set
VM5000
Video Measurement • www.tektronix.com/video 10
Options SD and HD Video Measurements (Continued)
Characteristic Description
Sync Measurement Accuracy
Sync Amplitude ±2 mV ±1.5% of reading Blanking interval measurements, including
sync amplitude, width and rise time
Sync Timing (0.06/sample rate + 15 ppm x |Reading|) RMS
Rise Time and Fall Time ±5 ns
Channel Delay CH 1 to CH 2, CH 1 to CH 3, CH 2
to CH 3; readouts in ns
Range Accuracy
Measurement ±35 ns ±5 ns
Delay Match Error Less than 1 ns Any two channels
Option VGA Video Measurements *2
Characteristic Accuracy Description
Amplitude Measurements
Luma Level, Max and Min ±8 mV ±2.0% of reading VESA 6.1
Color Bars ±3 mV ±1.8% of reading Channel voltage levels measured relative to back porch
Ch-Ch Mismatch (mV) ±3 mV ±3.6% of reading 32-step staircase signal. VESA 6.5 Channel
voltage levels measured relative to back porch
Ch-Ch Mismatch (%) ±0.4% ±(3.6%) x (Luma Level)/(Max
Luma Level); maximum ±4%
H & V sync Logic “0” and “1” ± [8mV ±(0.0085) x (p-p sync amplitude)] ±1.8% VESA 7.1
(p-p sync amplitude)=(logic 1 voltage)–(logic 0 voltage)
Linearity, Resolution, Monotonicity
Integral Linearity (%) ±2% VESA 6.4. Requires step response compliant
Differential Linearity ±0.25 LSB (8 bit) to VESA limits for overshoot/undershoot,
±0.5 LSB (10 bit) amplitude and settle time
RGB Video Monotonicity ±0.25 LSB (8 bit) Monotonicity checks every step on the ramp
±0.5 LSB (10 bit) to ensure signal is always rising
Resolution Measurement Range 5 to 10 bits Resolution measured in bits
HV Sync Monotonic Rise and Fall Detects monotonicity errors as small as 1% Checks sync for always rising and always-
of p-p sync amplitude falling characteristic. Requires VESA compliant
amplitude, noise, rise and fall
Noise
Noise (mV) Measurement Range 8 to 15 mV ±5.25 mV
Noise (mV) Measurement Range 15 to 25mV The lesser of ±7 mV or ±35%
Noise Injection Ratio (%) Measurement
Range 1.1% to 2.1%
±.75%
Noise Injection Ratio (%) Measurement
Range 2.1% to 3.6%
±1%
Timing
Channel Skew Measurement Range ±35 ns ±500 ps Alternate implementation of VESA 6.7; Any two channels
H Timing (ns) – Front and Back Porch, Left 360 ps ±15 ppm x Reading
and Right Border, Addressable Video
H Sync Period, H and V Sync Pulse width (ns) 80 ps ±15 ppm x Reading
V Sync Period (µs) 20 ns ±15 ppm x Reading Read out (precision) is 1 µs
Measurement of RGB noise on constant pedestal,
0 to 700 mV. Output in mV peak to peak, dB below
700 mV, VESA Sec 6.6. Displayed value corrected for
instrument noise. Specification applies with 500 MHz
bandwidth filter and 10 averages selected