Fluke 45 Setting the Trigger Type Configuration, External Triggering via the Computer Interface

45

Users Manual

2.Press Eand Tsimultaneously.

"tri" and a number corresponding to the selected trigger type ("1", "2", "3", "4", or "5" from Table 5-3) are displayed.

Note

If Eis pressed before (rather than simultaneously with) T, the meter will toggle from autorange to manual range or vice-versa, depending upon the range mode you are in.

3.Press Uor Tto step up or down the trigger type list.

Step to trigger type "2" (external trigger with settling delay disabled) or "3" (external trigger with settling delay enabled) to allow measurements to be triggered from the front panel. (Typical settling delays are provided in Table 4-3.)

4.When the desired trigger type is highlighted, press Eto select that trigger type.

If trigger type "2" or "3" has been selected, "REMOTE" and "EXT TRG" will be displayed, confirming that you are in the remote mode and external trigger has been enabled. (If you are not in the remote mode, you will not be able to trigger measurements from the front panel.)

5.Press Tto trigger a measurement. Each subsequent press of the Ttriggers a measurement.

6.To exit the remote mode, press S.

You will still be in external trigger. In order to return the meter to its internal (continuous) trigger state, perform steps 1-3 above to select trigger type "1".

If you exit the remote mode with trigger type "4" or "5" selected, the meter will still be in external trigger, but because it is no longer in the remote mode, you will only be able to trigger measurements with the rear trigger (types "4" and "5") or over the computer interface (using the *TRG command). To re-enter the remote mode, re- select trigger type "2" or "3" as described above.

Setting the Trigger Type Configuration

To select a trigger type over the computer interface, send the command:

TRIGGER <type>

where <type> is a number between 1 and 5 that identifies a trigger type. See Table 5-3. If <type> is not one of these numbers, an Execution Error is generated.

Select a trigger type that enables the settling delay (type 3 or 5) when the input signal is not stable before a measurement is triggered. Typical settling delays are provided in Table 4-3. The reading transfer rates are provided in Table 5-4.

External Triggering via the Computer Interface

To trigger a measurement over the RS-232 or IEEE-488 computer interface, send the meter a *TRG command over the computer interface. See Table 5-8.

The following external triggering methods can be used only when the IEEE-488 interface is enabled:

•When the IEEE-488 interface is enabled, the receive pin (RX) of the RS-232 interface can be configured for use as an external trigger input. (See the TRIGGER command, Table 5-14).

5-12