Tektronix VM700T, User Manual

Page: 93 / 138

Vector Mode
3- 18
VM700T Option 01 (NTSC) & Option 11 (PAL) User Manual
The control knob is used in conjunction with the Move/Expand button to vary
the display phase Angle and Gain, and with the Display and Graticule buttons to
set the display’s Intensity. When the Select Line button is pressed, the control
knob performs a digital line select function.
Display Phase Angle. When entering Vector mode, the default function of the
control knob is to vary the display phase Angle (the Move LED is on). As a
phase shifter, the control knob rotates the display in one-tenth degree increments,
as indicated by the Angle (deg) readout in the upper right corner of the display.
Expand (Gain) Range. When the Expand button is pressed, the control knob
becomes a calibrated vector Gain control. Expand is also temporarily selected
when the screen is touched inside or near the graticule. The Gain readout in the
upper right corner of the display indicates the current Gain setting with a
multiplier (x) and in dB.
The default Vector Gain is x1.000 (0.000 dB), and can be compressed or
expanded from x0.250 (–12.195 dB) to x50.000 (34.055 dB) in 0.023 dB
increments.
Display and Graticule Intensity. Display and graticule intensity adjustments are
also made with the control knob. While the Display button is held in, the control
knob varies the intensity of the vector, menu information, and any other text on
the display not associated with the graticule. While the Graticule button is held
in, the control knob varies only the intensity of the graticule.
Pressing the Menu button either displays the Vector menu or toggles it off (if it is
already displayed). The Vector Menu is shown in Figure 3--7.
V-Axis Switch (PAL only):
inverts the vector around the V-axis for a line with a
–V-axis burst. It has no effect on lines with a +V-axis burst.
Display Select V (PAL only):
toggles between display of lines with a +V-axis, a
–V-axis, or both axes (default).
Vector Menu
Change
Setup
Burst
Reference
Noise
15.05 dB
75% Bar
Col
Burst in
Source
Burst in
Ch. A
Burst in
Ch. B
Burst in
Ch. C
Burst Reference Submenu
Figure 3- 7: Vector mode menu
Control Knob
Menu
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