User Guide Rev. D User Manual

VTG 300/300R • OperationVTG 300/300R • Operation
Operation, cont’d
Video Testing Features
The VTG can output a total of 13 different test patterns by
selecting from among six categories of test patterns: crosshatch,
H pattern, color bars, grayscale, alternating/multiburst, and
white field. See figure 2-12..
The output rate is selected by setting the signal range and the
scan rate. See the Front Panel Features section in this chapter for
descriptions of the Test Patterns button, the Range button, and
the Select button.
Refer to Test Pattern Setup menu in this chapter to
change the current Grayscale or White Field pattern.
2-192-18
Displayed levels are for high impedance loads. For
600-ohm loads, there is a -.7 dB (unbalanced) / -1.3 dB
(balanced) difference between the displayed and actual
levels.
Setting the audio frequency
The audio frequency for each audio signal type is selected from a
range of values using the or Frequency buttons and
observing the LCD. The following table lists the available
frequencies.
Audio
Signal Format Audio Frequencies
Pink Noise N/A
White Noise N/A
Sine Wave 20 Hz, 25 Hz, 31.5 Hz, 40 Hz, 50 Hz, 63 Hz, 80 Hz, 100 Hz,
125 Hz, 160 Hz, 200 Hz, 250 Hz, 315 Hz, 400 Hz, 500 Hz,
630 Hz, 800 Hz, 1.0 kHz, 1.25 kHz, 1.6 kHz, 2.0 kHz,
2.5 kHz, 3.15 kHz, 4.0 kHz, 5.0 kHz, 6.3 kHz, 8.0 kHz,
10 kHz, 12.5 kHz, 16 kHz, 20 kHz
Square Wave 20 Hz, 25 Hz, 31.5 Hz, 40 Hz, 50 Hz, 63 Hz, 80 Hz, 100 Hz,
125 Hz, 160 Hz, 200 Hz, 250 Hz, 315 Hz, 400 Hz, 500 Hz,
630 Hz, 800 Hz, 1.0 kHz, 1.25 kHz, 1.6 kHz, 2.0 kHz,
2.5 kHz, 3.15 kHz, 4.0 kHz, 5.0 kHz
Polarity Test 1 Hz
Swept Sine Wave Sweep speed (in seconds): 150, 120, 90, 60, 30, 15, 1.5
If the audio signal format is specified as swept sine wave,
the default menu cycle will not indicate an audio
frequency. A sweep speed will be displayed instead as
shown in the following flowchart.
VGA 31.5kHz
640x480 @60
Power
on
3 sec.
3 sec.
3 sec.
AUDIO LEVEL
-72dBu 0.20mV
Sweep Speed
30 sec
60-543-01
FW Ver. 1.00
EXTRON
VTG 300
Figure 2-11 — Sweep speed submenu