Tektronix 1740A/1750A Configure Menu, INPUT, VECTOR, and, When, when, when, is selected, and, the internal reference is, is selected (sync is present only on the first channel)

Using the Menus

Configure Menu

Push the CONFIG button to display the configure menu, shown in Figure 3-6. Turn the left bezel control to select

INPUT, VECTOR, FORMAT, STANDARD, OFFSET, CALIBRATE,

REMOTE, or REFERENCE (a box appears around the selec- tion). Following are descriptions of each selection.

INPUT

HCOUPLING — Selects AC or DC coupling for rear-panel inputs.

HDC RESTORER — Selects the clamp speed. Slow will clamp while displaying any hum.

HCLAMP — Selects the point of the video signal that is clamped to 0. Can be set for ST (sync tip) or BP (back porch).

HA123 — 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

HBARS — 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.

HSETUP — (NTSC operation only) Configures the instrument to accept signals with or without setup.

HPAL — (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.

HTEST — Used by service personnel; refer to the service manual.

3-18 1740A/1750A Series Waveform/Vector Monitor User Manual