Fluke PM-3370B, PM-3380B, PM-3390B, PM-3394B, PM-3384B user manual External triggering

3 - 28 USING THE COMBISCOPE INSTRUMENTS

3.4.1.5External triggering

External triggering is only possible for the PM33x0B CombiScope instruments. Channel 4 is used as the external trigger channel with the following view possibilities:

-attenuator positions 0.1 and 1 V/div (AMP key).

-trigger slope positive or negative (EXT TRIG key).

-trigger coupling AC or DC (AC/DC key).

The view facility of the external trigger channel is switched on by sending the SENSe:FUNCtion:ON "XTIMe:VOLTage4" command, or by sending the SYSTem:KEY 812 command to simulate the pressing of the TRIG VIEW key on the front panel.

Note: The view facility of the external trigger channel can only be switched on when:

•EXTernal or INTernal4 (CH4) is programmed as the trigger source.

•Peak detection is off.

Autoset scans for the presence of a signal on channel 1, 2, and the external trigger input. If there is a signal present on the external trigger input, the EXTernal trigger channel is selected as trigger source, and the external trigger view facility becomes active.

Limitation: The amplitude of the external trigger signal must be high enough for the sensitivity of the external trigger input (0.1 or 1 V/div.).