Trigger system

Trigger modes

Auto, Normal, and Single

Trigger coupling

DC, AC, HF reject (attenuates >50 kHz), LF reject (attenuates <50 kHz), noise reject (reduces sensitivity)

Trigger holdoff range

20 ns to 8 s

Trigger sensitivity (typical)

Edge type, DC coupled

Trigger source

Sensitivity

Any analog channel input

For 1 mV/div to 4.98 mV/div; 0.75 div from DC to 50 MHz,

increasing to 1.3 div at instrument bandwidth

≥ 5 mV/div: 0.40 div from DC to 50 MHz, increasing to 1 div at

instrument bandwidth

Aux In (External); available on two-channel instruments only

200 mV from DC to 50 MHz, increasing to 500 mV at 200 MHz

Line

Fixed

Trigger level ranges

Any input channel

±8 divisions from center of screen, ±8 divisions from 0 V when vertical LF reject trigger coupling is selected

Aux In (External)

±8 V

Line

The line trigger level is fixed at about 50% of the line voltage.

Trigger frequency readout

Provides 6-digit frequency readout of triggerable events.

Trigger types

Edge

Positive, negative, or either slope on any channel. Coupling includes DC, AC, HF reject, LF reject, and noise reject.

Sequence (B-trigger)

Trigger Delay by Time: 9.2 ns to 8 s. Or Trigger Delay by Events: 1 to 4,000,000 events. Not available when “Either” edge is

selected.

Pulse Width

Trigger on width of positive or negative pulses that are >, <, =, ≠, or inside/outside a specified period of time.

Timeout

Trigger on an event which remains high, low, or either, for a specified time period (4 ns to 8 s).

Runt

Trigger on a pulse that crosses one threshold but fails to cross a second threshold before crossing the first again.

Logic

Trigger when any logical pattern of channels goes false or stays true for specified period of time. Any input can be used as a clock

to look for the pattern on a clock edge. Pattern (AND, OR, NAND, NOR) specified for all input channels defined as High, Low, or

Don’t Care.

Setup and Hold

Trigger on violations of both setup time and hold time between clock and data present on any of the analog and digital input

channels.

Setup and hold trigger type

Description

Setup Time Range

-0.5 ns to 1.024 ms

Hold Time Range

1.0 ns to 1.024 ms

Setup + Hold Time Range

0.5 ns to 2.048 ms

Rise/Fall Time

Trigger on pulse edge rates that are faster or slower than specified. Slope may be positive, negative, or either and time range is

4.0 ns to 8 s.

Video

Trigger on all lines, odd, even, or all fields on NTSC, PAL, and SECAM video signals.

480p/60, 576p/50, 720p/30, 720p/50, 720p/60, 875i/60, 1080i/50, 1080i/60, 1080p/24, 1080p/24sF, 1080p/25, 1080p/30,

1080p/50, 1080p/60

Custom bi-level and tri-level sync video standards.

Parallel (available when option

3-MSO is installed)

Trigger on a parallel bus data value. Parallel bus can be from 1 to 20 bits (from the digital and analog channels) in size. Binary and

Hex radices are supported.

3 Series MDO

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