Tektronix VM5000 Series, Quick Start User Manual

Page: 59 / 94

Getting Acquainted with Your Instrument
Option SD/HD Warning messages (cont.)
Number Text Possible causes
Operation where it
may occur
15 Noise: Invalid results for all channels. The line number is set incorrectly,
inappropriate input signal, or incorrect
con
fi guration.
Measuring Noise
16 Nonlinearity: Invalid Results: Channel
<x>: No ramp or step signal found The line number is set incorrectly or
inappropriate input signal. Measuring NonLinearity
17 Nonlinearity: Signal Change: Channel
<x>: The signal changed during
measurement. Measuring NonLinearity
18 Short Time Distortion: Bar Start Not
Found The line number is set incorrectly,
distorted signal, or incorrect format
selected. Measuring Short Time
Distortion
19 Short Time Distortion: Bar End Not
Found The line number is set incorrectly,
distorted signal, or incorrect format
selected. Measuring Short Time
Distortion
20 Short Time Distortion: Invalid results
for Channel<x>. The line number is set incorrectly,
inappropriate input signal, or incorrect
con
fi guration.
Measuring Short Time
Distortion
21 Sync Measurements Inconclusive The instrument cannot fi nd a proper
sync, the wrong format is selected, or
the signal is distorted.
Measuring Sync
22 Sync Measurement: <n> Not Found The instrument cannot fi nd a proper
sync.
Measuring Sync
23 2T pulse not found in luminance
component of signal The line number is set incorrectly,
inappropriate input signal, or incorrect
con
fi guration.
Measuring Short Time
Distortion
24 Writing over fi le < fi lename> The instrument is writing over an
existing
fi le.
Recalling settings;
Generating a report
25 Sync Acquisition Problem: Either
cannot trigger or the signal levels are
out of range. Triggering
Option VGA Warning messages
Number Text Possible causes
Operation where it may
occur
1
Sync edge locations questionable.
Make sure that the selected format is
correct. The format is set incorrectly. Measuring H Sync,
V Sync, and V Timing
2 H Timing: Incorrect signal in Channel
<1–3>. Use Black-White-Black signal.
Sync edge locations questionable.
Make sure that the selected format is
correct. The format is set incorrectly. Measuring H Timing
3 H Timing: Incorrect signal in Channel
<1–3>. Use Black-White-Black signal. Black-White-Black signal is not being
used. Measuring H Timing
VM Series Video Measurement System Quick Start User Manual 45