Tektronix MSO46 — настройки триггера последовательного интерфейса RS-232 [486/628]

RS-232 serial bus trigger settings panel. Requires option SRCOMP. Mode & Holdoff panel (Bus Trigger configuration panel)

fields and controls

Field or control Description

Source Select the RS232 bus on which to trigger.

Trigger On Select the type of information on which to trigger.

Data Bytes Sets the number of data bytes (1 byte = 8 bits) on which to trigger (one to ten bytes). Use the A

knob to change the value.

Available when Trigger On = Data.

Data Sets the data pattern on which to trigger. The number of bits shown depends on the Data

Words setting.

Tap the Binary, Hex, or ASCII field and use the A and B knobs to select and change the

values. Or double-tap on the field and use the virtual keypad to enter values.

Available when Trigger On = Data.

A, B knob controls Use the A knob to select (highlight) the digit(s) to change.

Use the B knob to change the value of the digit(s).

Field or control Description

Trigger Mode The trigger mode determines how the instrument behaves in the absence or presence of a

trigger event:

Auto trigger mode enables the instrument to acquire and display a waveform even if a trigger

does not occur. Auto mode uses a timer that starts when the acquisition is started, and the

pretrigger information is obtained. If a trigger event is not detected before the timer times out,

the instrument forces a trigger. The length of time it waits for a trigger event depends on the

time base setting.

When forcing triggers in the absence of valid triggering events, Auto mode does not

synchronize the waveform on the display. The waveform will appear to jump across the screen.

If valid triggers occur, the display will become stable.

Normal trigger mode enables the instrument to acquire a waveform only when it is triggered. If

no trigger occurs, the last waveform record acquired remains on the display. If no last waveform

exists, no waveform is displayed.

Force Trigger Forces a trigger event regardless of whether the waveform meets any trigger conditions.

Menus and dialog boxes

456 4/5/6 Series MSO Help