Specifications
Operation
VTM-200 Installation and Operation Handbook 3-22
10. To cycle the waveform from normal to the zoomed displays around 0 IRE and 100
IRE, press WAVEFORM.
11. To change a user-settable parameter, press SETUP to display the on-screen menu
selections. (See the VTM-200 SETUP MENU table in this manual for a listing of
all possible menu items and their values).
12. To show just one selectable line of video on the waveform and vector displays,
press the LINE SELECT button.
13. Choose the line to be displayed by turning the LINE rotary control in either
direction.
14. Control the horizontal and vertical positions of the waveform with the H and V
rotary controls.
15. The VECTOR PHASE rotary control allows for the rotation of the vector display in
order to bring the vector tips into the target areas for burst and for color bar test
patterns.
The GPI/TALLY connector may be used to provide momentary contact closures (from,
for example, remotely located relays or switches) to select one of the four inputs, just
as the front panel INPUT button does. It also allows for the control of the ON AIR
status indicated on-screen.
Use a computer keyboard connected through a maximum of 25 feet of extension cable
to the back panel KEYBOARD connector to control the unit. See Table 3-8 for a
listing of admissible keystrokes and their functionality.
The VTM-200 may have its flash ROM, which holds the program for its embedded
microcontroller, updated by a computer via the COM connector, by cabling it to a
serial COM port on the computer. The communications parameters are no parity, 8
data bits, and the baud rate is selectable via the SETUP menu to be in the range of 300
to 38,400.