A and B Triggering both where applicable

COUPLING Determines the method used to couple signal to input of trigger circuits.

AC: Rejects DC and attenuates signals below about 60 Hz. Accepts signals above about 60 Hz.

LF REJ: Rejects DC and attenuates signals below about 50 kHz. Ac- LEVEL cepts signals above about 50 kHz.

HF REJ: Accepts signals between 60 Hz and 50 kHz. Rejects DC and attenuates all signals outside the above range.

DC: Accepts all trigger signals from DC to 100 MHz or greater.

Selects source of trigger signal.

NORM: Internal trigger signal obtained from Vertical Deflection System. Actual source is signal(s) displayed on CRT.

CH 1: A sample of the signal connected to the CH 1 OR X input connector is used as a trigger signal.

CH 2: A sample of the signal connected to the CH 2 OR Y input connector is used as a trigger signal.

EXT: Trigger signal is obtained from signal connected to the External Trigger Input connector.

EXT -M0 (A trigger circuit only): External trigger signal is attenuated by a factor of 10.

STARTS AFTER DELAY (B trigger circuit only): B sweep starts immediately after the delay time selected by the DELAY-TIME POSITION dial and the DELAY-TIME switch.

LINE (A trigger circuit only): Trigger signal is obtained from a sample of the line voltage applied to the instrument.

Selects the slope of the trigger signal which starts the sweep.

+: Sweep can be triggered from the positive-going portion of the trigger signal.

—: Sweep can be triggered from the negative-going portion of the trigger signal.

Selects the amplitude point on the trigger signal at which the sweep is triggered.

A TRIG MODE

ATRIG HOLDOFF

External Trigger Input (not labeled)

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