Tm Trigger Mode; Figure 7-279 Tm Syntax - Agilent Technologies 8560E User Manual

Agilent technologies 8560 e-series and ec-series spectrum analyzers

Table of Contents

Language Reference

TM Trigger Mode

Figure 7-279

The TM command selects a trigger mode. Selected trigger conditions

must be met in order for a sweep to occur. The available trigger modes

are listed below. When any trigger mode other than free run is selected,

a T appears on the left edge of the display.

selects the external mode. Connect an external trigger

source to J5 EXT/GATE TRIG INPUT on the rear panel

of the spectrum analyzer. The source must range from 0

to 5 V (TTL). The trigger occurs on the rising, positive

edge of the signal (about 1.5 V).

selects the free-run mode. Sweep triggers occur as fast

as the spectrum analyzer will allow.

selects the line mode. Sweep triggers occur at intervals

synchronized to the line frequency.

selects the video mode. Sweep triggers occur whenever

the positively-sloped part of the input signal passes

through the video trigger level. This trigger level can be

changed (refer to the VTL command), and a dashed line

appears on the screen to denote (approximately) the