Tektronix 1740A/1750A - Manual (Page 73)

Using the Menus
1740A/1750A Series Waveform/Vector Monitor User Manual 3-18
Configure Menu
Push the CONFIG button to display the configure menu,
shown in Figure 3-6. Turn the left bezel control to select
I
NPUT , VECTOR , FORMAT , STANDARD , OFFSET , CALIBRATE ,
REMOTE , or REFERENCE (a box appears around the selec-
tion). Following are descriptions of each selection.
INPUT
H COUPLING
—
Selects AC or DC coupling for
rear-panel inputs.
H
DC RESTORER
—
Selects the clamp speed. Slow
will clamp while displaying any hum.
H CLAMP
—
Selects the point of the video signal that
is clamped to 0. Can be set for ST (sync tip) or BP
(back porch).
H A123
—
and B123
—
When COMPOSITE is se-
lected, the instrument’s internal reference is the
input channel currently selected for display. For
COMPONENT, the internal reference is A1 when A123
is selected, and B1 when B123 is selected (sync is
present only on the first channel).
VECTOR
H
BARS
— The instrument can be configured to accept
75% or 100% amplitude color bar signals . Dual-
Standard instruments allow color bar signal ampli-
tudes to be set for NTSC and for PAL operation.
H
SETUP
— (NTSC operation only) Configures the
instrument to accept signals with or without setup.
H
PAL
— (PAL operation only) When +V is chosen,
the phase reference of the --V lines is inverted, then
shown as an overlay on the +V lines to provide a
comparison display. +V shows +V and --V on
alternate lines.
H
TEST
— Used by service personnel; refer to the
service manual.