Functional Overview

Time Code

Longitudinal time code is monitored in a frame-rate display to allow observation of amplitude, synchronization, and phase with respect to reference vertical sync. Synchronization is confirmed by the stationary display and time code phase is determined by horizontal position of the time code sync word on the CRT.

Multiple

When MULTIPLE is pushed, any combination of front-panel DISPLAY modes can be selected at the same time, with the exception of TIME CODE and PICTURE displays.

With MULTIPLE selected, the SCH/AUDIO switch sequences through SCH, AUDIO, and both. If waveform or vector is also selected, the switch will also sequence to OFF. (At least one mode must be on at all times.)

When exiting MULTIPLE, the instrument will return to the previous (non-MULTIPLE) display settings. When entering MULTIPLE again, the previous MULTIPLE display settings will be restored.

Displaying a Signal

Inputs

There are eight rear-panel loop-through inputs, which may eliminate the need for an external routing switcher. The inputs can be displayed singly or in combination.

Without PARADE or OVERLAY selected, only one input selection can be made at a time. Each input channel button (in- cluding A123 / B123) toggles between A and B, and is cancelled when another input button is pressed.

With PARADE or OVERLAY selected, the input channels can be displayed in combination. Pushing an input channel button sequences through the labeled channels, both, then off. Pushing another input button does not cancel the current selec- tion, but adds to it. To return to “single input” operation, push the PARADE / OVERLAY button until it is off (LED is no longer lighted).

1740A/1750A Series Waveform/Vector Monitor User Manual

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