Specifications

Operation
VTM-200 Installation and Operation Handbook 3-16
AUDIO, VECTOR, and WAVEFORM ZOOM Buttons
There are three ZOOM buttons: WAVEFORM, VECTOR, and AUDIO. The following
subsections explain their use.
Expanding the Audio Display
NOTE: This button is only active when the OPT-1 option is installed.
Press AUDIO ZOOM to select one of the display options:
• Expand the audio scales around the 0 dB reference point and enable increased
resolution of readings.
• Select items in the SETUP menu that are only concerned with audio.
• Forces the SETUP menu to appear in the screen quadrant normally occupied by the
vector display.
Expanding the Vector Display
Press VECTOR ZOOM to select one of five expanded display options:
• Expand the center
• Expand the upper-left quadrant
• Expand the upper-right quadrant
• Expand the lower-right quadrant
• Expand the lower-left quadrant
As with AUDIO ZOOM, the VECTOR ZOOM is helpful when increased resolution of
phase or saturation readings is required.
Expanding the Waveform Display
Press WAVEFORM ZOOM to select one of three display options:
• NORMAL or no expansion display of –50 to +120 IRE
• ZOOM positioned with a center value of 0 IRE and going to +20 IRE
• ZOOM positioned on the 100 IRE and reaching to +120 IRE
At each zoom position, the graticule scale and waveform displays expand to provide
more resolution around the zoom point.