Tektronix VM Series Quick Start User Manual

Getting Acquain
ted with Your Instrument
Option VGA Warning messages (cont.)
Number Text Possible causes
Operation where it may
occur
4 Invalid Results: A cquisition Problem:
Either cannot trigger or the signal
levels are out of range or acquired
less than the requested samples.
Acquisition failed: Tr igger missing,
format wrong or other cause of failure
to acquire signal.
All measurements
5
Linearity: Signal Change: Channel
<x>:
Stability problem while running
continuously: ramp went away or
number of steps changed.
Measuring Linearity
6
Linearity: Signal Fidelity Problem:
Channel <x> Resolution mismatch:
Line A<x> bits, Line B <y> bits: Steps
not found
For two-line ramps (lower portion of
ramp on one line and upper portion
of ramp on second line), the bit
resolution of the LSB staircase ramps
does not match or the total number
steps is not equal to (2^n — 1).
Measuring Linearity
7
Linearity: Error occurred in switch
accessory
The RGBHV Measurement Interface
Unit is not responding properly.
Measuring Linearity
8
Sync edge locations questionable.
Make sure that the selected format is
correct.
The format is set incorrectly. Measuring Color
Bars, Video Channel
Mismatch, Ch-Ch Skew,
Luma Levels, Video
Channel Mismatch, V
Sync, V Timing, and
Video Transient.
9
Color Bars: Yellow/Cyan/Green/Ma-
genta/Red/Blue/Black Bar not found.
Color Bars signal is not being used. Measuring Color Bars.
10
Ch-Ch Skew: Incorrect signal in
Channel <1–3>. Use the Alternate
White and Black bar signal.
The format is set incorrectl y. Measuring Ch-Ch Skew.
11 Luma Levels: Incorrect signal in
Channel <1–3>. Use the Alternate
White and Black bar signal.
Alternate White and Black signal is
not being used.
Measuring Luma Levels.
12 Video Transient: Incorrect signal in
Channel <1–3>. Use the Alternate
White & Black signal.
Alternate White and Black signal is
not being used.
Measuring Video
Tr ansient.
13
H Sync Jitter: Sync edge locations
questionable. Make sure the selected
format is correct.
The format is set incorrectly. Measuring H Sync Jitter.
14
Noise: Invalid results for some
channels.
The line number is set incorrectly,
inappropriate input signal, or incorrect
configuration.
Measuring Noise.
15
Ch-Ch Mismatch: Incorrect signal in
Channel <1–3>. Use the 32–step
Staircase signal in true color mode.
32–step Staircase signal not being
used.
Measuring Ch-Ch
Mismatch.
46 VM Series Video Measurement System Quick Start User Manual

Tektronix VM Series Specifications

General

Brand	Tektronix
Model	VM Series
Category	Test Equipment
Language	English