Specifications

Operation
VTM-200 Installation and Operation Handbook 3-9
Figure 3-7 illustrates a four-quadrant display with no video signal present, and the
(audio) SETUP menu displayed as a result of the front panel SETUP button having
been pressed, followed by a press of the AUDIO ZOOM button. The menu area
overwrites the vector display area. The selected menu item is Analog Audio Scale, and
the selected item value is Type I (+8 dBm). By moving the menu area over the vector,
the audio quadrant becomes visible so the effects of menu changes can be viewed
before the menu is exited.
Figure 3-7. Four-Quadrant Display without a Video Signal (Audio Menu)
Figure 3-8 shows a four-quadrant display with no video signal present, and with audio
present. The waveform graticule has been zoomed to the region around 0 IRE. The
7.5 IRE is a dotted graticule line that corresponds to picture black level. The vector
graticule has been zoomed to the top left quadrant. The audio scales remain unzoomed.
Audio channel A has been selected, and the 0 marks on the vertical scales correspond
to the audio reference of +8 dBm. The STATUS is not ON AIR, and the SOURCE ID
has been set to read INPUT A. The signal standard is NTSC. The SC/H phase is
measured to be 0°. The vertical gain is x1, the horizontal time scale is 5.0 μs per major
division, and the FLAT (FL) filter has been selected.
Figure 3-8. Four-Quadrant Display with Upper Left Vector