Keithley 2302 Instruction Manual page 137

Table 6-2 (cont.)
External trigger sequences for various operating modes (cont.)
BOTH VOLT READ
OFF ON AUTO
OFF OFF AUTO
VOLT ON NONE
*
AUTO OFF AUTO
*
*NOTE: These two configurations where BOTH equals VOLT or AUTO may be combined to provide an additional configuration. In
this configuration, one channel's trigger in is configured to voltage step both channels while the other channel is configured
to automatically take measurements on both channels. This allows a single trigger in pulse to step both channels' voltage
while the other trigger in pulse is used to take automatic measurements on both channels. A channel's trigger out pulse may
control a trigger in pulse for the other channel. By doing this, only one trigger in pulse needs to be generated in the applica-
tion system to step voltages and take automatic measurements on both channels. To enable either one or both of these con-
figurations, use the BOTHTRIGEXT command. See programming example number 3.
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Sequence After Detecting Trigger In Pulse
(See programming example number 2.)
1. The channel voltage will step.
2. The step delay setting will elapse.
3. Automatically trigger and take a voltage, current, DVM, or pulse current measurement.
a. Pulse current measurements do not need a valid trigger level setting.
b. Pulse current measurement will not sync to a pulse edge – rising/falling.
4. Store measurement in buffer.
5. The channel trigger out pulse will handshake.
(See programming example number 1.)
1. The step delay setting will elapse.
2. Automatically trigger and take a voltage, current, DVM, or pulse current measurement.
a. Pulse current measurements do not need a valid trigger level setting.
b. Pulse current measurement will not sync to a pulse edge – rising/falling.
3. Store measurement in buffer.
4. The channel trigger out pulse will handshake.
1. Channel of trigger in pulse will step voltage.
2. Opposite channel from trigger in pulse will step voltage.
3. The channel step delay will elapse.
4. The channel trigger out pulse will handshake.
5. For example, if channel 1 is set to voltage step both channels then, channel 1 steps,
channel 2 steps, channel 1 step delay elapses then trigger out channel 1 pulses.
(See programming example number 4.)
1. The channel step delay will elapse.
2. Automatically trigger a voltage, current, DVM, or pulse current measurement on chan-
nel of trigger in pulse.
3. Automatically trigger a voltage, current, DVM, or pulse current measurement on chan-
nel opposite channel from trigger in pulse.
4. Pulse current measurements in steps 2 and 3 do not need a valid trigger level setting
and do not sync to a pulse a rising or falling pulse edge before triggering.
5. Store both measurements in buffer.
6. The channel trigger out pulse will handshake.
7. For example, if channel 2 configured to take AUTO measurements on both channels
then, delay for channel 2's step elapses, channel 2 gets triggered, channel 1 gets trig-
gered, measurements stored in buffer then trigger out channel 2 pulses.
External Triggering (Model 2306-VS Only) 6-15